Effects of chemical and physical defects on the humidity sensitivity of graphene surface

Young Jun Son; Kyoung Yong Chun; Jun Sik Kim; Jong Heun Lee; Chang-Soo Han

doi:10.1016/j.cplett.2017.10.028

Effects of chemical and physical defects on the humidity sensitivity of graphene surface

Young Jun Son, Kyoung Yong Chun, Jun Sik Kim, Jong Heun Lee, Chang-Soo Han

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3 Citations (Scopus)

Abstract

We investigate the effect of the chemical and physical defects on the humidity sensitivity of graphene. For this we apply reactive ion etching for physical defects and the poly(methyl methacrylate) (PMMA) coating for chemical defects to the CVD graphene. The tendency of humidity sensing is hardly found by the physical defects while the distinct changes are observed with chemical defects by control of the thickness and the coverage area of the PMMA on the graphene surface. The graphenes covered with thinner or smaller area of PMMA show an enhanced humidity sensitivity, indicating the possibility of H₂O sensing.

Original language	English
Pages (from-to)	206-211
Number of pages	6
Journal	Chemical Physics Letters
Volume	689
DOIs	https://doi.org/10.1016/j.cplett.2017.10.028
Publication status	Published - 2017 Dec 1

Bibliographical note

Funding Information:
This work was supported by Center for Advanced Soft Electronics , ERC project ( 2016R1A5A1010148 ) and Basic Science Research Program funded by the Korea government (MSIP) ( 2015R1A2A2A01004751 , 2015R1A2A1A01005931 ).

Publisher Copyright:
© 2017 Elsevier B.V.

Keywords

Defect
Graphene
Humidity sensing
Poly(methyl methacrylate)

ASJC Scopus subject areas

Physics and Astronomy(all)
Physical and Theoretical Chemistry

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10.1016/j.cplett.2017.10.028

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title = "Effects of chemical and physical defects on the humidity sensitivity of graphene surface",

abstract = "We investigate the effect of the chemical and physical defects on the humidity sensitivity of graphene. For this we apply reactive ion etching for physical defects and the poly(methyl methacrylate) (PMMA) coating for chemical defects to the CVD graphene. The tendency of humidity sensing is hardly found by the physical defects while the distinct changes are observed with chemical defects by control of the thickness and the coverage area of the PMMA on the graphene surface. The graphenes covered with thinner or smaller area of PMMA show an enhanced humidity sensitivity, indicating the possibility of H2O sensing.",

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AU - Chun, Kyoung Yong

AU - Kim, Jun Sik

AU - Lee, Jong Heun

AU - Han, Chang-Soo

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PY - 2017/12/1

Y1 - 2017/12/1

N2 - We investigate the effect of the chemical and physical defects on the humidity sensitivity of graphene. For this we apply reactive ion etching for physical defects and the poly(methyl methacrylate) (PMMA) coating for chemical defects to the CVD graphene. The tendency of humidity sensing is hardly found by the physical defects while the distinct changes are observed with chemical defects by control of the thickness and the coverage area of the PMMA on the graphene surface. The graphenes covered with thinner or smaller area of PMMA show an enhanced humidity sensitivity, indicating the possibility of H2O sensing.

AB - We investigate the effect of the chemical and physical defects on the humidity sensitivity of graphene. For this we apply reactive ion etching for physical defects and the poly(methyl methacrylate) (PMMA) coating for chemical defects to the CVD graphene. The tendency of humidity sensing is hardly found by the physical defects while the distinct changes are observed with chemical defects by control of the thickness and the coverage area of the PMMA on the graphene surface. The graphenes covered with thinner or smaller area of PMMA show an enhanced humidity sensitivity, indicating the possibility of H2O sensing.

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KW - Graphene

KW - Humidity sensing

KW - Poly(methyl methacrylate)

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JO - Chemical Physics Letters

JF - Chemical Physics Letters

ER -

Effects of chemical and physical defects on the humidity sensitivity of graphene surface

Abstract

Bibliographical note

Keywords

ASJC Scopus subject areas

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