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나노 구조 물리 연구단
나노구조물리 연구단
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Sensitive photo-thermal response of graphene oxide for mid-infrared detection

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Title
Sensitive photo-thermal response of graphene oxide for mid-infrared detection
Author(s)
Jung Jun Bae; Jung Hyun Yoon; Sooyeon Jeong; Byoung Hee Moon; Joong Tark Han; Hee Jin Jeong; Geon-Woong Lee; Ha Ryong Hwang; Young Hee Lee; Seung Yol Jeong; Seong Chu Lim
Publication Date
2015-10
Journal
NANOSCALE, v.7, no.38, pp.15695 - 15700
Publisher
ROYAL SOC CHEMISTRY
Abstract
This study characterizes the effects of incident infrared (IR) radiation on the electrical conductivity of graphene oxide (GO) and examines its potential for mid-IR detection. Analysis of the mildly reduced GO (m-GO) transport mechanism near room temperature reveals variable range hopping (VRH) for the conduction of electrons. This VRH behavior causes the m-GO resistance to exhibit a strong temperature dependence, with a large negative temperature coefficient of resistance of approximately −2 to −4% K−1. In addition to this hopping transport, the presence of various oxygen-related functional groups within GO enhances the absorption of IR radiation significantly. These two GO material properties are synergically coupled and provoke a remarkable photothermal effect within this material; specifically, a large resistance drop is exhibited by m-GO in response to the increase in temperature caused by the IR absorption. The m-GO bolometer effect identified in this study is different from that exhibited in vanadium oxides, which require added gold-black films that function as IR absorbers owing to their limited IR absorption capability.
URI
https://pr.ibs.re.kr/handle/8788114/1855
ISSN
2040-3364
Appears in Collections:
Center for Integrated Nanostructure Physics(나노구조물리 연구단) > Journal Papers (저널논문)
Files in This Item:
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