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

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 o...

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Bibliographic Details
Published in:AIP advances 2016-03, Vol.6 (3), p.035203-035203-7
Main Authors: Han, Kook In, Kim, Seung Du, Yang, Woo Seok, Kim, Hyeong Seok, Shin, Myunghun, Kim, Jong Pil, Lee, In Gyu, Cho, Byung Jin, Hwang, Wan Sik
Format: Article
Language:English
Subjects:
Circuits
EQUIVALENT CIRCUITS
GRAPHENE
HUMIDITY
IMPEDANCE
NANOSCIENCE AND NANOTECHNOLOGY
Organic chemistry
Oxidation
OXIDES
Power consumption
RAMAN EFFECT
Raman spectroscopy
SENSORS
X RADIATION
X-RAY DIFFRACTION
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Summary: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.
ISSN:2158-3226
2158-3226
DOI:10.1063/1.4943509