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journal article·2016-03-01Open access

Material characteristics and equivalent circuit models of stacked graphene oxide for capacitive humidity sensors

Kook In Han, Seung Du Kim, Woo Seok Yang, Hyeong Seok Kim, Myunghun Shin, Jong Pil Kim, In Gyu Lee, Byung Jin Cho, Wan Sik Hwang

AIP Advances· Volume 6· Issue 3
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Source abstract

Abstract

The oxidation properties of graphene oxide (GO) are systematically correlated with their chemical sensing properties. Based on an impedance analysis, the equivalent circuit models of the capacitive sensors are established, and it is demonstrated that capacitive operations are related to the degree of oxidation. This is also confirmed by X-ray diffraction and Raman analysis. Finally, highly sensitive stacked GO sensors are shown to detect humidity in capacitive mode, which can be useful in various applications requiring low power consumption.
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Research context

Nanomaterials

OpenAlex topics: Gas Sensing Nanomaterials and Sensors · Graphene research and applications · Analytical Chemistry and Sensors

SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.

Affiliations

Korea Aerospace University 1 Department of Materials Engineering, , Goyang 412-791, Korea

Korea Electronics Technology Institute 2 Electronic Materials and Device Research Center, , Seongnam 463-816, Korea

Korea Aerospace University 3 School of Electronics and Information Engineering, , Goyang 412-791, Korea

Korea Basic Science Institute 4 Division of High Technology Materials Research & Molecular Materials Research Team, , Busan 168-230, Korea

KAIST 5 Department of Electrical Engineering, , Daejeon 305-701, Korea

Funding

National Research Foundation of Korea · Ministry of Science, ICT and Future Planning

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