Issue 27, 2014

Graphene-based gas sensor: metal decoration effect and application to a flexible device

Abstract

Roles of metal nanoparticles (NPs) on graphene-based devices were investigated in terms of gas-sensing characteristics of NO2 and NH3, and flexible gas sensing was also realized for future applications. The synergistic combination of metal NPs and graphene modulates the electronic properties of graphene, leading to enhancement of selectivity and sensitivity in gas-sensing characteristics. Introduction of palladium (Pd) NPs on the graphene accumulates hole carriers of graphene, resulting in the gas sensor being sensitized by NH3 gas molecular adsorption. In contrast, aluminum (Al) NPs deplete hole carriers, which dramatically improves NO2 sensitivity. Furthermore, the sensitivity of flexible graphene-based gas sensors was also enhanced via the same approach, even after 104 bending cycles and was maintained after 3 months.

Graphical abstract: Graphene-based gas sensor: metal decoration effect and application to a flexible device

Supplementary files

Article information

Article type
Paper
Submitted
14 Mrz 2014
Accepted
01 Mai 2014
First published
07 Mai 2014

J. Mater. Chem. C, 2014,2, 5280-5285

Author version available

Graphene-based gas sensor: metal decoration effect and application to a flexible device

B. Cho, J. Yoon, M. G. Hahm, D. Kim, A. R. Kim, Y. H. Kahng, S. Park, Y. Lee, S. Park, J. Kwon, C. S. Kim, M. Song, Y. Jeong, K. Nam and H. C. Ko, J. Mater. Chem. C, 2014, 2, 5280 DOI: 10.1039/C4TC00510D

To request permission to reproduce material from this article, please go to the Copyright Clearance Center request page.

If you are an author contributing to an RSC publication, you do not need to request permission provided correct acknowledgement is given.

If you are the author of this article, you do not need to request permission to reproduce figures and diagrams provided correct acknowledgement is given. If you want to reproduce the whole article in a third-party publication (excluding your thesis/dissertation for which permission is not required) please go to the Copyright Clearance Center request page.

Read more about how to correctly acknowledge RSC content.

Social activity

Spotlight

Advertisements