Improved metal-graphene contacts for low-noise, high-density microtransistor arrays for neural sensing
| Autor: | Nikolaos Mavredakis, Javier Martínez-Aguilar, Jessica Bousquet, David Jiménez, Jose A. Garrido, Anton Guimerà-Brunet, Nathan Schaefer, Antonio P. Pérez-Marín, Elisabet Prats-Alfonso, Eduard Masvidal-Codina, Andrea Bonaccini Calia, Elena del Corro, Clément Hébert, Laura Rodríguez, José Pedro De La Cruz, Rosa Villa, Xavi Illa, Ramon Garcia-Cortadella |
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| Rok vydání: | 2020 |
| Předmět: |
Imagination
Materials science Fabrication media_common.quotation_subject 02 engineering and technology Metal-contact interfaces 010402 general chemistry Two-dimensional materials 01 natural sciences State of the art law.invention law Ultraviolet-ozone Homogeneity (physics) General Materials Science Flicker noise Electronics media_common business.industry Graphene Contact treatment Linearity General Chemistry Graphene contacts 021001 nanoscience & nanotechnology 0104 chemical sciences Optoelectronics 0210 nano-technology business Science technology and society Neural interfaces Theoretical modeling |
| Zdroj: | Dipòsit Digital de Documents de la UAB Universitat Autònoma de Barcelona Recercat: Dipósit de la Recerca de Catalunya Varias* (Consorci de Biblioteques Universitáries de Catalunya, Centre de Serveis Científics i Acadèmics de Catalunya) Recercat. Dipósit de la Recerca de Catalunya instname Carbon |
| Popis: | Poor metal contact interfaces are one of the main limitations preventing unhampered access to the full potential of two-dimensional materials in electronics. Here we present graphene solution-gated field-effect-transistors (gSGFETs) with strongly improved linearity, homogeneity and sensitivity for small sensor sizes, resulting from ultraviolet ozone (UVO) contact treatment. The contribution of channel and contact region to the total device conductivity and flicker noise is explored experimentally and explained with a theoretical model. Finally, in-vitro recordings of flexible microelectrocorticography (μ-ECoG) probes were performed to validate the superior sensitivity of the UVO-treated gSGFET to brain-like activity. These results connote an important step towards the fabrication of high-density gSGFET μ-ECoG arrays with state-of-the-art sensitivity and homogeneity, thus demonstrating the potential of this technology as a versatile platform for the new generation of neural interfaces. |
| Databáze: | OpenAIRE |
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