Highly sensitive optical hydrogen sensor using biomimetic nano-needle

Sungwon Hwang

doi:10.1117/12.2569085

20 August 2020 Highly sensitive optical hydrogen sensor using biomimetic nano-needle

Sungwon Hwang

Proceedings Volume 11465, Low-Dimensional Materials and Devices 2020; 114651J (2020) https://doi.org/10.1117/12.2569085
Event: SPIE Nanoscience + Engineering, 2020, Online Only

Conference Poster

Abstract

Two dimensional (2-D) atomic layers have several advantages such as flexibility in choosing substrates, easy fabrication, large package area, minimum change of components, enhanced expiration date, and reduced defects by oxygen blocking structure for smart sensor. Individual graphene quantum dots (GQDs) become sensitive to H2 gas when their surfaces are decorated with Pd metal, and previous reports measure typical chemoresistive increases to be approximately 2-fold. Here, thousand-fold increases in resistance are demonstrated in the specific case where a Pd cluster decorates a GQDs defect site. Measurements on GQDs, performed both before and after defect incorporation, prove that defects have extraordinary consequences on the chemoresistive response, especially in the case of GQDs with metallic band structure.

Citation Download Citation

Sungwon Hwang "Highly sensitive optical hydrogen sensor using biomimetic nano-needle", Proc. SPIE 11465, Low-Dimensional Materials and Devices 2020, 114651J (20 August 2020); https://doi.org/10.1117/12.2569085

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