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Alberto Veses Premio Extraordinario de Doctorado 2016-2017
2 March, 2018

The Doctorate School of The University of Zaragoza has published the list of PhD awards 2016-2017

https://escueladoctorado.unizar.es/sites/escueladoctorado.unizar.es/files/users/docto/prop_def_premios_2016_17_report-3.pdf

Alberto Veses Roda appears in the Engineering and Architecture section, in the doctorate program of Renewable Energies and Energy Efficiency.

Congratulations to Alberto Veses and thesis supervisors Tomás García and Ramón Murillo

The Environmental Research Group has appeared in the TV program “En ruta con la ciencia” of Aragón Televisión
26 October, 2017

GIM members have appeared in the program “En ruta con la ciencia” of Aragón Televisión its chapter 72 (25/10/2017): El mundo del motor.

The interview with the group’s leader Ramón Murillo can be watched in the following link, briefly in the opening of the program and more extensively from minute 14.

http://alacarta.aragontelevision.es/buscador-avanzado/resultados-buscados_1/?palabra=en+ruta+con+la+ciencia&buscar=

 

Conferencia en el ICB: Monitoring the integration process of individual single-walled carbon nanotubes into sensing devices
5 July, 2017

El Dr. Miro Haluska  de Micro and Nanosystems ETH en Zurich,  Suiza dará una conferencia el 13 de Julio en el  ICB-CSIC: Monitoring the integration process of individual single-walled carbon nanotubes into sensing devices.

El Seminario tendrá lugar en el salón de actos del ICB-CSIC, Zaragoza.

Jueves 13 de Julio, 12:30

RESUMEN:

Monitoring the integration process of individual single-walled carbon nanotubes into sensing devices 

Miro Haluska, Wei Liu, Sebastian Eberle, Lalit Kumar, Laura Vera Jenni, Pooriya Gh Ghanbari, Pol Peiffer, Cosmin Roman, Christofer Hierold.   Micro and Nanosystems ETH Zürich, Tannenstrasse 3, 8092 Zurich, Switzerland

Our nanotube devices (gas sensors and nanoresonators) are based on individual single-walled carbon nanotubes (SWCNTs) and were fabricated either by standard photo- or electron-beam lithography, or by ultra-clean mechanical transfer from dedicated growth substrates onto the final devices [1]. SWCNTs were synthesized on SiO2/Si chips or SOI structures from ferritinbased Fe catalyst nanoparticles by LPCVD at 850°C in CH4/H2 [2]. As-grown suspended SWCNTs were visualized by post-synthesis deposition of volatile nanoparticles and inspected by optical microscopy and by Raman spectroscopy. For the optical microscopic visualization we used a para-nitrobenzoic acid (pNBA) based approach as introduced in [3]. Substrate bound CNTs were pre-characterized by AFM and Raman spectroscopy. The combination of this visualization and characterization methods allows for the determination of the position of CNTs with respect to predefined chip structures and the selection of pre-characterized nanotubes for further device fabrication.

Devices based on individual SWCNTs often do not perform as expected from nanotubes’ outstanding intrinsic properties. Additionally, variations in electrical characteristics of individual carbon nanotube field effect transistors (iCNFETs), cannot be explained solely by the variation in intrinsic properties of different SWCNTs [4]. Both above-mentioned observations can be caused by physical and chemical impacts of device fabrication processes on SWCNTs. To monitor the impact of the device fabrication, selected SWCNTs were characterized by Raman spectroscopy after individual processing steps. By this approach we determined, for example, the minimum thickness of sacrificial alumina layer required to protect SWCNTs from the impact of plasma ashing used for removing lithography resist residuals [5]. Using the process flow monitoring for optimization of the device fabrication helped narrowing the variation of devices resistance and 1.8 times improvement in median value of device resistance.

References:

  1. Muoth, M., Hierold, C., (2012). Transfer of carbon nanotubes onto microactuators for hysteresisfree transistors at low thermal budget. IEEE MEMS 2012, Paris, pp 1352-1355.
  2. Durrer, L., Greenwald, J., Helbling, T., Muoth, M., Riek, R., Hierold, C., (2009). Narrowing SWNT diameter distribution using size-separated ferritin-based Fe catalysts. Nanotechnology 20, 355601-7
  3. Zeevi, G., et al., (2016) Automated circuit fabrication and direct characterization of carbon nanotube vibrations. Nature Comms. Art Nr.: 12153, DOI: 10.1038/ncomms12153.
  4. Park, H., Afzali, A., Han S.J., Tulevski, G.S., Franklin, A.D., Tersoff, J., Hannon J.B., Haensch, W., (2012). High-density integration of carbon nanotubes via chemical self-assembly. Nature nanotechnology 7, 787-791.
  5. Liu, W., Chikkadi, K., Hierold, C., Miroslav Haluska, (2016) Enabling fabrication of clean electrical contacts to carbon nanotubes using oxygen plasma ashing. physica status solidi b, 253, 2417-2423.

 

 

2016 Highly Cited Researchers
31 October, 2016

thomson-reuters-awardProf Juan Adanez, Dr. Luis de Diego, Dr. Francisco Garcia Labiano, Dr. Pilar Gayan and Dr. Alberto Abad  appear in the 2016 “highly cited researchers” list published by Thompson Reuters for second year in a row.

This prestigious list includes those scientific researchers who have written the greatest number of reports officially designated by  Essential Science Indicators as Highly Cited Papers – ranking among the top 1% most cited for their subject field and year of publication, earning them the mark of exceptional impact. Those listed are identified as being among the world’s most influential scientific minds.

2015 Highly Cited Researchers
31 October, 2016

galardonProf Juan Adanez, Dr. Luis de Diego, Dr. Francisco Garcia Labiano, Dr. Pilar Gayan and Dr. Alberto Abad  appear in the 2015 “highly cited researchers” list published by Thompson Reuters. This prestigious list includes those scientific researchers who have written the greatest number of reports officially designated by  Essential Science Indicators as Highly Cited Papers – ranking among the top 1% most cited for their subject field and year of publication, earning them the mark of exceptional impact.

Those listed are identified as being among the world’s most influential scientific minds.