Graphene field effect transistors as gas sensors: Lessons learned in new collaborations

Authors

  • Arnel A. Salvador National Institute of Physics, University of the Philippines Diliman

Abstract

Graphene field effect transistors as gas sensors, with sensitivities as low as 1 ppm to ammonia, nitrogen dioxide, and methanol were fabricated. The fabricated devices have active surface areas of at least 40x40 μm2. The studies indicate that sensitivity was enhanced with a deposition of a thin layer of Pd on top of graphene. Measurements also show that the geometry of the chamber for gas sensing affect the transient response of the gas sensor. This PCARI funded project, done in collaboration with UC Berkeley also show the synergy between physics institutions in the Philippines.

About the Speaker

Arnel A. Salvador, National Institute of Physics, University of the Philippines Diliman

Arnel Salvador is a professor of physics at the National Institute of Physics, University of the Philippines Diliman. He completed his BS in Physics from the University of the Philippines Diliman and PhD in Physics from the University of Illinois at Urbana-Champaign. His research interests include molecular beam epitaxial growth of III-V thin films and nanostructures, and device fabrication for sensor and optoelectronic applications. In 2018 he was elected as Academician to the National Academy of Science and Technology.

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Published

2020-10-19

How to Cite

[1]
AA Salvador, Graphene field effect transistors as gas sensors: Lessons learned in new collaborations, Proceedings of the Samahang Pisika ng Pilipinas 38, SPP-2020-INV-2F-01 (2020). URL: https://proceedings.spp-online.org/article/view/SPP-2020-INV-2F-01.