tag:blogger.com,1999:blog-55705339124116044092024-03-14T07:46:23.351+01:00The Nanolithic Era- Blog de curiositats sobre el nanomón i fabricació de nano-dispositius -Jordihttp://www.blogger.com/profile/13561912915672900403noreply@blogger.comBlogger49125tag:blogger.com,1999:blog-5570533912411604409.post-72307829177302650322022-06-21T09:58:00.003+02:002022-06-21T09:58:19.707+02:00Towards the fabrication of Silicon Nanowires with Quantum Dot as a Platform for experimentation in Quantum Tecnologies (oral contribution to E-MRS)In the following video, it is explained the last advances we have made in our research project.
Our main objective is to build a semiconductor qbit platform for experimentation. We are exploring two main nano-fabrication approaches:</br></br>
- Mix and Match between electron beam lithography (EBL) and optical lithography </br></br>
- Focused ion beam implantation (FIB-i) and EBL</br>
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<iframe width="480" height="270" src="https://youtube.com/embed/DnQd0mhGZmc" frameborder="0"></iframe>
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We can produce single charge transistors at low temperature but also to scale the fabrication to wafer level, getting more than 5000 independently connected NWs in a single wafer.Jordihttp://www.blogger.com/profile/13561912915672900403noreply@blogger.com0tag:blogger.com,1999:blog-5570533912411604409.post-22682470978808631972021-09-27T12:47:00.003+02:002022-06-21T10:08:17.132+02:00MNE 2021 - Turin (Italy) Silicon NanowiresAs introduced in the last post, we are presenting our last results in the international conference Micro Nano Engineering (MNE). This year the conference is hosted in Turin (Italy) and its the first hybrid (in-situ and also on-line) conference Im participating.
The last day of the conference I presented the following work. Here, we presented a new approach for advanced electronic devices and mechanical resonators based in silicon nanowires with embedded quantum dots. Here there is the abstract:
<div class="separator" style="clear: both;"><a href="https://1.bp.blogspot.com/-0OX157T19oY/YVGhOmyNj7I/AAAAAAAAILk/LP5HTAAi4LgJQkh98MqmgAC60JxNHQbXgCLcBGAsYHQ/s2048/abstract%2Bmne%2Bllobet.png" style="display: block; padding: 1em 0; text-align: center; "><img alt="" border="0" width="400" data-original-height="1500" data-original-width="2048" src="https://1.bp.blogspot.com/-0OX157T19oY/YVGhOmyNj7I/AAAAAAAAILk/LP5HTAAi4LgJQkh98MqmgAC60JxNHQbXgCLcBGAsYHQ/s400/abstract%2Bmne%2Bllobet.png"/></a></div>Jordihttp://www.blogger.com/profile/13561912915672900403noreply@blogger.com0tag:blogger.com,1999:blog-5570533912411604409.post-77571807926477664192021-09-22T10:56:00.003+02:002021-09-22T10:59:23.571+02:00MNE 2021 - Turin (Italy)We are very happy to be presenting our last results in the international conference Micro Nano Engineering (MNE). This year the conference is hosted in Turin (Italy) and its the first hybrid (in-situ and also on-line) conference Im participating.
<a href="https://www.mne2021.org/"><a href="https://www.mne2021.org/" target="_blank"><div class="separator" style="clear: both;"><a href="https://1.bp.blogspot.com/-BaQZ40GiA1I/YUrpiTCBOWI/AAAAAAAAIKk/QevEYHw5zAo_YnF-0407FfNJr-mp53R3wCLcBGAsYHQ/s448/mne2021.jpg" style="display: block; padding: 1em 0; text-align: center; "><img alt="" border="0" width="400" data-original-height="112" data-original-width="448" src="https://1.bp.blogspot.com/-BaQZ40GiA1I/YUrpiTCBOWI/AAAAAAAAIKk/QevEYHw5zAo_YnF-0407FfNJr-mp53R3wCLcBGAsYHQ/s400/mne2021.jpg"/></a></div></a></a>
Yesterday we had been presenting two oral contributions and a poster. If you are interested to see what are we working on I invite you to their abstract ;)
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- New solutions for photovoltaics:
<div class="separator" style="clear: both;"><a href="https://1.bp.blogspot.com/-IbKFtxQ49Q4/YUrsjQWoRJI/AAAAAAAAIKs/ix3pAiKf1H0aKKvdQU9EC02bTj835uRNACLcBGAsYHQ/s2048/abstract%2Bimatge.png" style="display: block; padding: 1em 0; text-align: center; "><img alt="" border="0" width="400" data-original-height="1451" data-original-width="2048" src="https://1.bp.blogspot.com/-IbKFtxQ49Q4/YUrsjQWoRJI/AAAAAAAAIKs/ix3pAiKf1H0aKKvdQU9EC02bTj835uRNACLcBGAsYHQ/s400/abstract%2Bimatge.png"/></a></div>
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- Three level replication of polymer structures:
<div class="separator" style="clear: both;"><a href="https://1.bp.blogspot.com/-CaD40kUU4kg/YUru_nhC9PI/AAAAAAAAIK0/9UuAzolVe28I7vzBoDjU1PNS4IB35lY8gCLcBGAsYHQ/s2048/MNE%2Binjecci%25C3%25B3.png" style="display: block; padding: 1em 0; text-align: center; "><img alt="" border="0" width="400" data-original-height="1471" data-original-width="2048" src="https://1.bp.blogspot.com/-CaD40kUU4kg/YUru_nhC9PI/AAAAAAAAIK0/9UuAzolVe28I7vzBoDjU1PNS4IB35lY8gCLcBGAsYHQ/s400/MNE%2Binjecci%25C3%25B3.png"/></a></div>
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- New resist Medusa:
<div class="separator" style="clear: both;"><a href="https://1.bp.blogspot.com/-TZzDZp4KMkc/YUrvKfci9JI/AAAAAAAAIK4/Umo3vepcLV4m_FkUM7SNsY2rdb4rxq9CQCLcBGAsYHQ/s2048/medusa.png" style="display: block; padding: 1em 0; text-align: center; "><img alt="" border="0" width="400" data-original-height="1530" data-original-width="2048" src="https://1.bp.blogspot.com/-TZzDZp4KMkc/YUrvKfci9JI/AAAAAAAAIK4/Umo3vepcLV4m_FkUM7SNsY2rdb4rxq9CQCLcBGAsYHQ/s400/medusa.png"/></a></div>
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There is still another presentation for tomorrow where I am going to show our last advances towards quantum computing. Our approach consists to embed quantum dots inside silicon nanowires and I think it is a very promising work. Hope to see you there!Jordihttp://www.blogger.com/profile/13561912915672900403noreply@blogger.com0tag:blogger.com,1999:blog-5570533912411604409.post-53233848774361748412021-09-15T17:24:00.003+02:002021-12-31T20:17:04.861+01:00European researcher's night: Dissemination poster of the project I am working inThis is an outreach dissemination poster (for general audiences) in order to explain the project I am working in. This time the poster has been writen in catalan, it is expected its presentation during the European Researcher's Night. The event aims to bring researchers closer to the general public and to increase public awareness of research and innovation activities, creating an understanding of the impact of researchers’ work on citizens’ daily lives and encouraging young people to embark on research careers.
<div class="separator" style="clear: both;"><a href="https://1.bp.blogspot.com/-0BgZY1LRlLk/YUITP2X5BwI/AAAAAAAAIJs/EttVYgZhqhgvwGw5y7lVKNrPYWnQ8dEhQCLcBGAsYHQ/s2048/poster%2Boutreach%2BJordi%2BLlobet%2B_%2Bfor%2Binternet%2Bpurposes.png" style="display: block; padding: 1em 0; text-align: center; "><img alt="" border="0" height="600" data-original-height="2048" data-original-width="1408" src="https://1.bp.blogspot.com/-0BgZY1LRlLk/YUITP2X5BwI/AAAAAAAAIJs/EttVYgZhqhgvwGw5y7lVKNrPYWnQ8dEhQCLcBGAsYHQ/s600/poster%2Boutreach%2BJordi%2BLlobet%2B_%2Bfor%2Binternet%2Bpurposes.png"/></a></div>Jordihttp://www.blogger.com/profile/13561912915672900403noreply@blogger.com0tag:blogger.com,1999:blog-5570533912411604409.post-71008946326201490912021-03-12T10:50:00.003+01:002021-03-12T10:56:36.148+01:00Introduction to research for undergraduate and graduate students<p>There is this very interesting call for being introduced into research. I think two of the projects are specially interesting, here there are some details enclosed. </p><p> </p><p></p><p></p><p><iframe height="480" src="https://drive.google.com/file/d/1JLsQThY6rbUBkEImh4E5IVa7TUytPh8A/preview" width="640"></iframe></p>
<iframe src="https://drive.google.com/file/d/1xUZ75tJWy6sGjdqtKzpDX1lTyySETrjV/preview" width="640" height="480"></iframe>Jordihttp://www.blogger.com/profile/13561912915672900403noreply@blogger.com0tag:blogger.com,1999:blog-5570533912411604409.post-11160927850378936522020-01-31T12:41:00.000+01:002020-01-31T12:41:17.133+01:00An efficient and deterministic photon management using deep subwavelength featuresIn this communication, we are presenting a novel method to enhance light trapping and the broadband absorption of the solar radiation absorption-based photonic devices.
Specifically, efficient broadband absorption was recently demonstrated
with arrays of subwavelength structures. The current study examines both
numerically and experimentally light trapping driven by deep sidewall
subwavelength structures (DSSS) in silicon nanopillar (NP) arrays (DSSS
arrays). Particularly, the focus is on DSSS geometries that are an
inherent outcome of the top-down dry etch approach used in arrays of
high aspect ratio NPs due to the periodical operationality of the Bosch
dry etch method. ~10% enhancement in the broadband absorption of DSSS
arrays compared with NP arrays is demonstrated numerically, as well as
the generation of near-IR absorptivity peaks of ~25% for DSSS arrays.
Importantly, it is shown that the introduction of DSSS systematically
blue-shifts the absorptivity peaks of the NP arrays and in this manner a
deterministic light trapping is possible. Finally, decrements of ~40%
in direct reflectivity and ~7% in diffused reflectivity in DSSS arrays
realized on silicon wafers is demonstrated experimentally.<br />
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The paper has been published in Nano Energy journal (Elsevier) and this is the link to the journal: <a aria-label="Persistent link using digital object identifier" class="doi" href="https://doi.org/10.1016/j.nanoen.2020.104521" rel="noreferrer noopener" target="_blank" title="Persistent link using digital object identifier">https://doi.org/10.1016/j.nanoen.2020.104521</a><br />
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<a href="https://doi.org/10.1016/j.nanoen.2020.104521" target="_blank"><img alt="https://doi.org/10.1016/j.nanoen.2020.104521" border="0" data-original-height="1054" data-original-width="1600" height="420" src="https://1.bp.blogspot.com/-H49-1zjf6u0/XjQSBbyqtwI/AAAAAAAAHHw/FDy-c84b5fsE_PDY9KZ-FJYST4SfaIwNwCLcBGAsYHQ/s640/1-s2.0-S2211285520300781-gr4_lrg.jpg" width="640" /><span id="goog_1764693367"></span></a><span id="goog_1764693368"></span></div>
Jordihttp://www.blogger.com/profile/13561912915672900403noreply@blogger.com0tag:blogger.com,1999:blog-5570533912411604409.post-39588032261431722752019-10-25T14:58:00.001+02:002019-10-25T15:03:39.854+02:00Automated characterisation and analysis of large arrays of nanostructures fabricated at wafer scaleIn this paper we are presenting a fast and automatic way of characterisation and data analysis using a general purpose SEM (Scanning Electron Microscope). This is a very interesting approach for us (International Iberian Nanotechnology Laboratory) as we are fabricating millions and millions of nanostructures everyday and we need to get feedback from how the structures look like in order to control and improve our fabrication tools and processes.<br />
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The paper has been published in Precision Engineering journal (Elsevier) and this is the link to the journal: <a class="anchor anchor-external-link" data-react-checksum="-177255439" data-reactid="1" data-reactroot="" href="http://doi.org/10.1016/j.precisioneng.2019.08.017" target="_blank"><span class="anchor-text" data-reactid="2">10.1016/j.precisioneng.2019.08.017</span></a><br />
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<a href="https://1.bp.blogspot.com/-wOlNKMVRfSM/XbLZ3d6HJrI/AAAAAAAAHDg/o2LJqlBBNi0sGtCM_HsjqKKOZX5OsEo-QCLcBGAsYHQ/s1600/abstract%2Bfigure.tiff" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" data-original-height="591" data-original-width="1534" height="244" src="https://1.bp.blogspot.com/-wOlNKMVRfSM/XbLZ3d6HJrI/AAAAAAAAHDg/o2LJqlBBNi0sGtCM_HsjqKKOZX5OsEo-QCLcBGAsYHQ/s640/abstract%2Bfigure.tiff" width="640" /></a></div>
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<span class="anchor-text" data-reactid="2">By this method we are able to check more than 300000000 (3 ∙ 10^8) pillars in one night or to study in detail 40000 </span><span class="anchor-text" data-reactid="2"><span class="anchor-text" data-reactid="2">(4 ∙ 10^4) </span>pillars in different positions of the wafer (1600 SEM images in both cases). We developed the scripts for iFast (programming of the SEM acquisition), Labview (image processing) and Mathematica (data visualization). </span><br />
<span class="anchor-text" data-reactid="2"><br /></span>
<span class="anchor-text" data-reactid="2">This is an example of the images we are processing:</span><br />
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<a href="https://1.bp.blogspot.com/-EtZkn87HnR4/XbLwjKdrS_I/AAAAAAAAHDs/jXQS4F2TwIEk0Q-wOsEfIVaJ_zl1aL8yACLcBGAsYHQ/s1600/figure2.tiff" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" data-original-height="1072" data-original-width="1600" height="427" src="https://1.bp.blogspot.com/-EtZkn87HnR4/XbLwjKdrS_I/AAAAAAAAHDs/jXQS4F2TwIEk0Q-wOsEfIVaJ_zl1aL8yACLcBGAsYHQ/s640/figure2.tiff" width="640" /></a></div>
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<span class="anchor-text" data-reactid="2"><br /></span>
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This is the abstract of the work you can find in <a href="https://doi.org/10.1016/j.precisioneng.2019.08.017" target="_blank">Precision Engineering</a> (<a aria-label="Persistent link using digital object identifier" class="doi" href="https://doi.org/10.1016/j.precisioneng.2019.08.017" rel="noreferrer noopener" target="_blank" title="Persistent link using digital object identifier">https://doi.org/10.1016/j.precisioneng.2019.08.017</a>):<br />
Large-area and dense arrays of nanometric scale structures are commonly
fabricated for several applications. The characterisation of sub-micron
structures (below 1 μm) at a large scale as well as the related data
analysis are challenging tasks. Here, we present a method to address the
image acquisition, the data extraction and the data analysis, applied
to the evaluation of the uniformity of nanometric structures in a
silicon master. Automated routines for both high and low magnification
Scanning Electron Microscope (SEM) imaging have been successfully
developed. SEM images have been automatically acquired by scripting
routines, which collect large amounts of images of the nanometric
structures covering multiple regions of the wafer in a few hours.
Geometric parameters of the nanometric structures such as diameter,
period and height have been extracted from the raw images using the
developed image processing scripts. Finally, the data extracted from
more than 4800 images acquired with three different characterisation
scripts (1600 images for each study) have been analysed and plotted
according to their position in the wafer.<br />
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And we can get visual results as:<br />
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<a href="https://1.bp.blogspot.com/-pL6eaZ5LsQM/XbLwpo2IOFI/AAAAAAAAHDw/zbC3Tx_Ik9cUE4cDGmCPWaxyove-tx0RgCLcBGAsYHQ/s1600/figure7.tiff" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" data-original-height="1191" data-original-width="1600" height="476" src="https://1.bp.blogspot.com/-pL6eaZ5LsQM/XbLwpo2IOFI/AAAAAAAAHDw/zbC3Tx_Ik9cUE4cDGmCPWaxyove-tx0RgCLcBGAsYHQ/s640/figure7.tiff" width="640" /></a></div>
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To cite our work this is the reference:<br />
Llobet J, Martins M, Calaza C, Antunes M, Martins S, Fonseca H, Pires B and Gaspar J <br /> Precis. Eng. 60, 320-325 (2019).<br />
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For any question or suggestion do not hesitate to contact me.<br />
<a class="anchor anchor-external-link" data-react-checksum="-177255439" data-reactid="1" data-reactroot="" href="http://doi.org/10.1016/j.precisioneng.2019.08.017" target="_blank"><span class="anchor-text" data-reactid="2"><br /></span></a>Jordihttp://www.blogger.com/profile/13561912915672900403noreply@blogger.com0tag:blogger.com,1999:blog-5570533912411604409.post-26480041800794974782017-12-19T13:09:00.000+01:002017-12-19T13:11:17.372+01:00Happy new year!!!<a href="http://inl.int/inl-greetings-2017-2018/ "><div class="separator" style="clear: both; text-align: center;"><a href="https://4.bp.blogspot.com/-ZePyNzb2zMs/WjkBr6CJk-I/AAAAAAAAGh4/ugIxrHEx8Jc5_RemQCXsNREwC8b9z_QAACLcBGAs/s1600/aaa.jpg" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" src="https://4.bp.blogspot.com/-ZePyNzb2zMs/WjkBr6CJk-I/AAAAAAAAGh4/ugIxrHEx8Jc5_RemQCXsNREwC8b9z_QAACLcBGAs/s640/aaa.jpg" width="640" height="638" data-original-width="597" data-original-height="595" /></a></div></a>
I una petita <a href="http://inl.int/inl-greetings-2017-2018/ ">animació </a>:)Jordihttp://www.blogger.com/profile/13561912915672900403noreply@blogger.com0tag:blogger.com,1999:blog-5570533912411604409.post-21048959464744213542017-05-17T16:44:00.001+02:002017-05-17T16:45:58.985+02:00Research IDAquest és l'enllaç al meu Research ID: <span id='badgeCont803402' style='width:126px'><script src='http://labs.researcherid.com/mashlets?el=badgeCont803402&mashlet=badge&showTitle=false&className=a&rid=K-1414-2016'></script></span>
Aquí es pot veure les publicacions a les quals he participat i, les que son open-source, poden ser descarregades lliurement.
Jordihttp://www.blogger.com/profile/13561912915672900403noreply@blogger.com0tag:blogger.com,1999:blog-5570533912411604409.post-24292689842667582962017-02-19T18:58:00.001+01:002017-02-19T18:58:23.874+01:00Nova etapa a l'INLAquesta ha estat la meva primera setmana a l'INL. L'INL és un laboratori de recerca internacional i interdisciplinar, orientat a l'estudi de la nanociència i nanotecnologia, ubicat a la ciutat de Braga (Portugal)<br />
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<a href="http://inl.int/" target="_blank"><img border="0" height="41" src="https://4.bp.blogspot.com/-YtsB86xOPxY/WKncMaPtAjI/AAAAAAAAFqA/HzS32ZgcBs85IxiJ6dmuSJ0XUBDEiOsZACLcB/s320/logo%2Binl.png" width="320" /></a><span id="goog_89714524"></span><span id="goog_89714525"></span><a href="https://www.blogger.com/"></a></div>
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De moment comença la meva etapa d'adaptació però estic molt content i motivat de tirar endavant els nous reptes que tot just comencen.Jordihttp://www.blogger.com/profile/13561912915672900403noreply@blogger.com0tag:blogger.com,1999:blog-5570533912411604409.post-78060852616115478572016-12-19T14:55:00.001+01:002016-12-19T14:55:21.551+01:00Micro-naus interestelars a l'hangar (imatge cedida a Fotciencia)<span class="notaFormulario izquierda clearBoth marginBottom20" id="TBFotografiasResumen"><b><a href="http://fotciencia.es/Publico/Galeria/FormAmpliacionImg.aspx?Fotografia=15953" target="_blank">Imatge</a></b> obtinguda mitjançant un microscopi electrònic d'escombrat. </span><br />
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<a href="https://2.bp.blogspot.com/-zKkGWGnqxPY/WFfleuP7CqI/AAAAAAAAFm8/KT4VfvbpStUBpeFwYSL1xu_EbqdvE-iFACLcB/s1600/naus%2Brepostant.jpg" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" height="268" src="https://2.bp.blogspot.com/-zKkGWGnqxPY/WFfleuP7CqI/AAAAAAAAFm8/KT4VfvbpStUBpeFwYSL1xu_EbqdvE-iFACLcB/s400/naus%2Brepostant.jpg" width="400" /></a></div>
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<span class="notaFormulario izquierda clearBoth marginBottom20" id="TBFotografiasResumen">Es pot
apreciar vuit nanofils de silici suspesos (silicon nanowires) entre set
plataformes d'ancoratge i dos elèctrodes per a la seva excitació
elèctrica.
Els nanofils suspesos son estructures molt prometedores en els camps de
la nanoelectrònica i nanomecànica, on s'investiga emprar-los com a
transistors electrònics (ordinadors, telèfons intel·ligents, components
electrònics específics,...) i com a sensors/actuadors de dimensions
sub-micromètriques (nano-robors, sensors de massa,...) </span><br />
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<span class="notaFormulario izquierda clearBoth marginBottom20" id="TBFotografiasResumen">Els nanofils de la imatge mesuren 4 micròmetres de llarg, 0,1 micròmetre
d'ample i 0,04 micròmetre d'espessor. Cada plataforma d'ancoratge
presenta quatre estructures de compensació per evitar el sobregravat
durant la fabricació, donant peu a la seva similitud amb naus espacials.</span><br />
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<br />Jordihttp://www.blogger.com/profile/13561912915672900403noreply@blogger.com0tag:blogger.com,1999:blog-5570533912411604409.post-67964021984799531762016-12-19T14:55:00.000+01:002016-12-19T14:59:20.704+01:00Micro-expansió de l'agricultura per l'antic Egipte (imatge cedida a Fotciencia)<span class="notaFormulario izquierda clearBoth marginBottom20" id="PHPrincipal_TBFotografiasResumen"><b><a href="http://fotciencia.es/Publico/Galeria/FormAmpliacionImg.aspx?Fotografia=15954" target="_blank">Imatge</a></b>
obtinguda mitjançant un microscopi electrònic d'escombrat. </span><br />
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<a href="https://1.bp.blogspot.com/-nX4TI6on3O8/WFfmjQXlXTI/AAAAAAAAFnA/BvyrHMPwvcsSdmGtagwDdYrCC4qH1b_4ACLcB/s1600/Riego-en-el-Nilo.jpg" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" height="268" src="https://1.bp.blogspot.com/-nX4TI6on3O8/WFfmjQXlXTI/AAAAAAAAFnA/BvyrHMPwvcsSdmGtagwDdYrCC4qH1b_4ACLcB/s400/Riego-en-el-Nilo.jpg" width="400" /></a></div>
<span class="notaFormulario izquierda clearBoth marginBottom20" id="PHPrincipal_TBFotografiasResumen"><br /></span>
<span class="notaFormulario izquierda clearBoth marginBottom20" id="PHPrincipal_TBFotografiasResumen"> La imatge
mostra una punta micromecanitzada de silici (pel seu ús en microscopia
de forces atòmiques, AFM) juntament amb una partícula de 10 micròmetres
de diàmetre i una tela de pols.
La microscòpia de forces atòmiques és una eina de gran importància i
molt utilitzada en investigació per realitzar mapes topogràfics i
interactuar amb la materia a escala nanomètrica. </span><br />
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<span class="notaFormulario izquierda clearBoth marginBottom20" id="PHPrincipal_TBFotografiasResumen">La informació es
produeix de la interacció i detecció de forces moleculars i atòmiques
que actuen entre la punta i la mostra.
La imatge ens transporta a l'expansió de l'agricultura durant l'antic
Egipte. La partícula representaria el sol, la tela de pols l'aigua del
Nil, la punta d'AFM s'assembla a una piràmide i la textura de la
micropalanca de suport representaria una plantació.</span><br />
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<br />Jordihttp://www.blogger.com/profile/13561912915672900403noreply@blogger.com0tag:blogger.com,1999:blog-5570533912411604409.post-8205501482826058292016-11-21T14:55:00.003+01:002016-11-21T14:55:34.870+01:00Evaluating the compressive stress generated during fabrication of Si doubly clamped nanobeams with AFM<br />
En aquest <a href="http://scitation.aip.org/content/avs/journal/jvstb/34/6/10.1116/1.4967930?TRACK=RSS" target="_blank">treball </a>que acabem de publicar al "Journal of Vacuum Science & Technology B", hem emprat el mètode de "Peak Force tapping" i espectroscòpia de força per avaluar l'estrès generat durant la fabricació de nano-palanques suspeses de silici doblement ancorades de secció rectangular. Les nano-palanques, alliberades al darrer estadi de fabricació, presenten curvatura que suggereix comportament biestable, típic d'estructures que retenen un estrès compressiu residual. L'estrès residual i el Mòdul de Young han sigut extrets de dades experimentals emprant dues metodologies diferents: a) anàlisi dels perfils de defecció de les nano-palanques i b) flexió mecànica induïda amb una punta d'AFM. Els resultats dels dos mètodes han estat comparats aportant informació de les limitacions dels dos mètodes.<br />
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Jordihttp://www.blogger.com/profile/13561912915672900403noreply@blogger.com0tag:blogger.com,1999:blog-5570533912411604409.post-40793295508507469902016-11-08T14:54:00.002+01:002016-11-08T14:54:26.324+01:00Taula periòdica dels elements i principals usosDeixo un <a href="http://elements.wlonk.com/ElementsTable.htm" target="_blank">enllaç </a>d'una pàgina web interactiva d'una taula periòdica on s'indica els principals usos dels diferents elements. Un treball molt interessant i divulgatiu des del punt de vista dels materials. Enjoy!<br />
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<a href="http://elements.wlonk.com/ElementsTable.htm" target="_blank"><img alt="http://elements.wlonk.com/ElementsTable.htm" border="0" height="270" src="https://2.bp.blogspot.com/-UB_-Gld8Vck/WCHYtMwF54I/AAAAAAAAFkU/OKCO2WB6xTYV46vKy04NWNPHost1wUJwQCLcB/s320/taula%2Bperiodica.jpg" width="320" /></a> </div>
<br />Jordihttp://www.blogger.com/profile/13561912915672900403noreply@blogger.com0tag:blogger.com,1999:blog-5570533912411604409.post-22579670972504961072016-11-03T15:31:00.001+01:002016-11-03T15:44:28.250+01:00Fotciencia 14S'ha obert el plaç de presentació d'imatges per a la 14ª edició del <a href="https://www.fotciencia.es/" target="_blank">FOTCIENCIA</a>.<br />
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El FOTCIENCIA és una iniciativa organitzada per la Fundació Espanyola per a la Ciència i la Tecnologia (FECYT) i el Consell Superior d'Investigacions Científiques (CSIC) amb l'objectiu d'apropar la ciència als ciutadans a través d'una visió artística i estètica d'imatges científiques, que s'esposaran juntament amb la descripció o comentari sobre el fet científic que il·lustren.<br />
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Si voleu més informació la trobareu en aquest <a href="https://www.fotciencia.es/" target="_blank">enllaç</a>. Teniu temps fins al 20 de novembre! <br />
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<br />Jordihttp://www.blogger.com/profile/13561912915672900403noreply@blogger.com0tag:blogger.com,1999:blog-5570533912411604409.post-7052674328365040712016-10-18T11:49:00.001+02:002016-10-18T11:50:57.307+02:001r premi - Young investigator award (Swisslitho and IBM)El passat gener d'aquest mateix any, el Dr. Matteo Lorenzoni i un servidor vam guanyar el primer premi d'idea de recerca per a investigadors joves organitzat per l'empresa Swisslitho i per IBM.<br />
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La idea bàsicament consisteix en investigar els efectes de realitzar un tractament tèrmic, a través d'un microscopi de forces atòmiques, sobre dispositius de silici amorf i suspesos. D'aquesta forma hauriem de ser capaços de dissenyar i fabricar transistors d'un sol electró (SET en anglès) de característiques elèctriques i capacitats tunnel desitjades .<br />
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<a href="https://swisslitho.com/press-young-researcher-competition/" target="_blank">Enllaç: Young researcher competition</a></div>
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En aquesta fotografia apareixen els membres del jurat, el president de Swisslitho, i els guanyadors del primer, segon i tercer premiJordihttp://www.blogger.com/profile/13561912915672900403noreply@blogger.com0tag:blogger.com,1999:blog-5570533912411604409.post-27910590292790926852016-10-03T11:46:00.000+02:002016-10-03T11:49:08.734+02:00Tesi doctoral<div class="Tesistext">
El passat 28 de Març del 2016 vaig defensar la<span lang="CA" style="mso-ansi-language: CA;"> meva tesi doctoral
titulada “Focused ion beam implantation as a tool for the fabrication of nano
electromechanical devices”, on s'aborda el repte de la fabricació de ressonadors nano-mètrics
des d’una nova òptica basada en la implantació iònica mitjançant un feix de ions
focalitzat (FIB). Aquest nou mètode permet fabricar nano-dispositius suspesos funcionals,
des del punt de vista elèctric i mecànic, sense necessitat d’utilitzar resina d’una
forma i) ràpida i simple, només son necessàries tres etapes de fabricació; ii)
flexible, permet definir dispositius amb gran llibertat geomètrica; iii) alta
resolució, es demostra la fabricació de dispositius suspesos de 4 </span><!--[if gte mso 9]><xml>
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</xml><![endif]--><span lang="CA" style="font-family: "calibri" , "sans-serif"; font-size: 11.0pt; line-height: 115%;">μ</span><span lang="CA" style="mso-ansi-language: CA;">m de longitud per 10 nm de diàmetre; iv)
reproduïble i v) compatible amb la tecnologia CMOS.</span></div>
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<span lang="CA" style="mso-ansi-language: CA;">La tesi es pot descarregar punxant en <a href="http://nanonems.imb-cnm.csic.es/images/Thesis/llobet.pdf">aquesta imatge</a> que apunta directament a la web del grup <a href="http://nanonems.imb-cnm.csic.es/" target="_blank">NanoNEMS (IMB-CNM CSIC)</a></span></div>
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<span lang="CA" style="mso-ansi-language: CA;"></span><span lang="CA" style="font-family: "calibri" , "sans-serif"; font-size: 11.0pt; line-height: 115%;">Partint d’un xip
de silici o SOI (silici - diòxid de silici - silici), el mètode de fabricació
comença amb un procés d’implantació FIB on es defineixen les estructures i les
connexions elèctriques del dispositiu. El segon pas consisteix en el gravat
humit del silici, on s’ataca el silici que no està protegit per la implantació
FIB, permetent la suspensió o alliberació dels dispositius. En aquest estadi, on
les estructures ja estan definides, el silici és amorf, conté gal·li i no és
elèctricament funcional (ρ</span><span lang="CA" style="mso-ansi-language: CA;"> ~1 </span><span lang="CA" style="font-family: "calibri" , "sans-serif"; font-size: 11.0pt; line-height: 115%;">Ω</span><span lang="CA" style="mso-ansi-language: CA;">·m</span><span lang="CA" style="font-family: "calibri" , "sans-serif"; font-size: 11.0pt; line-height: 115%;">). El darrer pas consisteix en un tractament
tèrmic a alta temperatura fins a 1000ºC, en ambient de nitrogen i amb un
precursor sòlid de bor on es propicia la recristal·lització del silici formant
nano-cristalls, dopar el silici amb bor (tipus p) i eliminar el gal·li. Aquest
tractament a alta temperatura, on les estructures no son oxidades, permet
obtenir dispositius elèctricament funcionals (ρ</span><span lang="CA" style="font-family: "calibri" , "sans-serif"; font-size: 11.0pt; line-height: 115%;"> ~10<sup>-4 </sup>Ω</span><span lang="CA" style="mso-ansi-language: CA;">·m). </span>
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<span lang="CA" style="mso-ansi-language: CA;">Els<span style="mso-spacerun: yes;"> </span>principals resultats obtinguts es poden
classificar en tres àmbits: </span></div>
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<b style="mso-bidi-font-weight: normal;"><span lang="CA" style="mso-ansi-language: CA;">Investigació de l’efecte de la implantació amb
ions gal·li en el silici</span></b><span lang="CA" style="mso-ansi-language: CA;">,
pel que fa tant a aspectes de processament com de propietats
nanoelectromecàniques del material.</span></div>
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<span lang="CA" style="mso-ansi-language: CA;">En aquest treball
hem caracteritzat l’estructura del material en les diferents etapes de
fabricació i hem caracteritzat elèctrica i electromecànicament els dispositius
finals obtinguts pel mètode descrit. </span></div>
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<b style="mso-bidi-font-weight: normal;"><span lang="CA" style="line-height: 150%; mso-ansi-language: CA; mso-bidi-font-size: 11.0pt;">Desenvolupament
i optimització del procés de fabricació</span></b><span lang="CA" style="line-height: 150%; mso-ansi-language: CA; mso-bidi-font-size: 11.0pt;">,
especialment pel que respecte al control de dimensions i a la combinació amb
altres processos</span></div>
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<span lang="CA" style="mso-ansi-language: CA;">Es mostra el
treball realitzat en la optimització dels diferents paràmetres de fabricació,
des de la posta a punt de la dosi d’ions fins a la selectivitat del gravat. A
través del disseny de les estructures es pot establir estratègies per controlar
i minimitzar els efectes d’”under-etching” en el silici, a través de la
definició d’estructures de compensació, i també evitar el col·lapse de les
estructures més llargues, degut a les tensions superficials que es produeixen
durant els processos de gravat humit, fabricant pilars per sostenir les
estructures. </span></div>
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<span lang="CA" style="mso-ansi-language: CA;">Aquest mètode de
fabricació permet obtenir dispositius a mida convertint-lo en una eina versàtil
de prototipatge i de fabricació petites quantitats, que permet aconseguir
dispositius de dimensions nano-mètriques per a l’experimentació acadèmica i
científica. </span></div>
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<b style="mso-bidi-font-weight: normal;"><span lang="CA" style="line-height: 150%; mso-ansi-language: CA; mso-bidi-font-size: 11.0pt;">Investigació
de les propietats electròniques, mecàniques i electromecàniques dels
dispositius</span></b><span lang="CA" style="line-height: 150%; mso-ansi-language: CA; mso-bidi-font-size: 11.0pt;">, i concretament en el cas de nanofils
de silici suspesos que es poden aplicar com a ressonadors mecànics d’altra
freqüència o transistors d’un sol forat. </span></div>
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<span lang="CA" style="mso-ansi-language: CA;">Hem pogut
fabricar ressonadors de diferents geometries que ens ha permès estudiar i
demostrar la relació que existeix entre la simetria/asimetria dels dispositius
i el senyal piezoresistiu mesurat durant la transducció electromecànica. Hem
investigat i fabricat transistors d’efecte camp ultra-fins (10 ~ 15 nm) i
transistors suspesos on les característiques elèctriques a baixa temperatura mostren
efectes de “Coulomb blockade” gracies als nano-cristalls que es formen, dins
dels nano-fils de silici suspesos, durant l’etapa de tractament tèrmic. </span></div>
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Jordihttp://www.blogger.com/profile/13561912915672900403noreply@blogger.com0tag:blogger.com,1999:blog-5570533912411604409.post-85101137159910499412016-09-30T14:28:00.001+02:002016-09-30T14:35:10.970+02:00MNE 2016 a ViennaLa setmana del 19 de setembre vam assistir i presentar resultats a la conferencia <a href="http://mne2016.org/" target="_blank">Micro and nano engineering (MNE)</a> 2016 a Vienna. Fruit dels últims treballs vam presentar <a href="http://mne2016.org/programme/programme-2/" target="_blank">un pòster i una xerrada</a>.<br />
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Els treballs es basen en el nou mètode de fabricació, que hem <a href="http://iopscience.iop.org/article/10.1088/0957-4484/25/13/135302/meta" target="_blank">desenvolupat</a>, que permet obtenir estructures suspeses de silici que son elèctrica i mecànicament funcionals.<br />
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Va ser un congrés molt interessant i vam aprendre un munt de coses en noves tendències de nanofabricació i nanociència. Jordihttp://www.blogger.com/profile/13561912915672900403noreply@blogger.com0tag:blogger.com,1999:blog-5570533912411604409.post-18108351276252647552015-08-21T10:41:00.001+02:002015-08-21T10:41:07.380+02:00http://nanolithography.spiedigitallibrary.org/article.aspx?articleid=2422286<a href="http://nanolithography.spiedigitallibrary.org/article.aspx?articleid=2422286">http://nanolithography.spiedigitallibrary.org/article.aspx?articleid=2422286</a>Jordihttp://www.blogger.com/profile/13561912915672900403noreply@blogger.com0tag:blogger.com,1999:blog-5570533912411604409.post-25454213240039714492015-01-15T18:37:00.002+01:002015-01-15T18:37:36.683+01:00Forma ràpida de resoldre una multiplicació de polinomisMai saps quan hauràs de resoldre un polinomi! A través d'aquest giny (widget) et resultarà molt ràpid i fàcil.<br />
<a href="http://www.wolframalpha.com/widgets/view.jsp?id=cf8ab64252a6279ef56f6142a2aabc1" target="_blank">Solucionar multipliacions de polinomis</a><br />
Jordihttp://www.blogger.com/profile/13561912915672900403noreply@blogger.com0tag:blogger.com,1999:blog-5570533912411604409.post-655947486822748772014-11-24T12:16:00.001+01:002014-11-24T12:16:45.427+01:00Link molt interesant per calcular derivades i integralsMolt recomanable, no has d'instal·lar cap software: <br /><br />
<a href="http://www.wolframalpha.com/widgets/view.jsp?id=a7d6c8e18f8b1ac4f5e383bbd82b75d5">Calculadora de Derivadas e Integrales</a>Jordihttp://www.blogger.com/profile/13561912915672900403noreply@blogger.com0tag:blogger.com,1999:blog-5570533912411604409.post-15017229829844974132012-03-27T16:01:00.004+02:002012-03-27T16:04:46.242+02:00Pels amants de la litografia per feix d'electronsEn aquesta entrada parafrasejo n'Amelia, una investigadora que treballa a Columbia i que es va formar amb nosaltres.<br />
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<span style="background-color: black; color: white; font-family: Arial, Tahoma, Helvetica, FreeSans, sans-serif; font-size: 14px; line-height: 20px;">"A very nice recipe I have learned here in NY is a new method to develop chips where you have written your design into PMMA with an e-beam. Instead of using IPA : MIBK (3:1), it is possible to develop with IPA : H2O (3:1). The only thing you have to do is to keep the mixture in the fridge, this is why it is called a cold developer. Here in Columbia they heard this method from IBM and apparently it is cleaner than developing with MIBK. Apart from that, by replacing the MIBK by H2O you are contaminating the environment less, it is less toxic for the user and it is cheaper and it works just great!"</span><br />
<span style="background-color: white; color: #333333; font-family: Arial, Tahoma, Helvetica, FreeSans, sans-serif; font-size: 14px; line-height: 20px;"><br /></span><br />
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<a href="http://3.bp.blogspot.com/-zm9xNPqra4g/T3HICF9Z2-I/AAAAAAAAAdQ/qVNwiXW07vE/s1600/800px-Water_droplet_blue_bg05.jpg" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" height="426" src="http://3.bp.blogspot.com/-zm9xNPqra4g/T3HICF9Z2-I/AAAAAAAAAdQ/qVNwiXW07vE/s640/800px-Water_droplet_blue_bg05.jpg" width="640" /></a></div>
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El seu blog és <a href="http://nanoamelia.blogspot.com/" target="_blank">aquest </a><br />
Enjoy!Jordihttp://www.blogger.com/profile/13561912915672900403noreply@blogger.com2tag:blogger.com,1999:blog-5570533912411604409.post-33014470444005028862012-03-26T10:31:00.001+02:002012-03-27T16:07:35.687+02:00nekein: ilustraciones y diseño gráfico: SUPERTIPO o TIPOVELOZD'això ja fa uns quants dies però encara ho trobo suprem.<br />
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<a href="http://nekeindesign.blogspot.com/2012/02/supertipo-o-tipoveloz.html?spref=bl">SUPERTIPO o TIPOVELOZ</a><br />
Ho trobareu a la web de l'artista <a href="http://nekeindesign.blogspot.com.es/" target="_blank">Nekein</a>.<br />
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It's really awesome!!Jordihttp://www.blogger.com/profile/13561912915672900403noreply@blogger.com0tag:blogger.com,1999:blog-5570533912411604409.post-81592434243421318672012-03-23T15:03:00.002+01:002012-03-23T15:08:45.263+01:00Científics i tecnòlegs tocats del boletDiuen que els científics estan una mica tocats del bolet. Puc certificar que és cert.<br />
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"Aquests" que surten a la foto volien demostrar la segona llei de Newton (F=ma)<br />
Concretament volien saltar tots alhora per crear una força tal que fos capaç de desviar la trajectòria del planeta unes dècimes de grau. Per sort no ho van aconseguir ;)<br />
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L'experiment que estàvem duent a terme era el de "fer sonar", com si fos un tambor, el cràter del volcà de Santa Margarida (Olot).<br />
En JP (per molts anys tità!) fa el gest però ens va enganyar a tots! El tiu no va ni saltar ;)Jordihttp://www.blogger.com/profile/13561912915672900403noreply@blogger.com0tag:blogger.com,1999:blog-5570533912411604409.post-64546285092857259622012-03-09T21:48:00.000+01:002012-03-09T21:48:20.228+01:00I ara una de tecnologia + tradicióAquest vídeo m'ha fet somriure.<br />
Trobo que la gent de Shackleton ha fet una molt bona campanya.<br />
Enjoy!<br />
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<div class="separator" style="clear: both; text-align: center;"><iframe allowfullscreen='allowfullscreen' webkitallowfullscreen='webkitallowfullscreen' mozallowfullscreen='mozallowfullscreen' width='320' height='266' src='https://www.youtube.com/embed/uE6iG7i9z1o?feature=player_embedded' frameborder='0'></iframe></div>Jordihttp://www.blogger.com/profile/13561912915672900403noreply@blogger.com0