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Humidity-independent Conducting Polyaniline Films Synthesized using Advanced Atmospheric Pressure Plasma Polymerization with in-situ Iodine Doping
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- Authors
- Choon-Sang Park, Do Yeob Kim, Dong Ha Kim, Hyung-Kun Lee, Bhum Jae Shin, Heung-Sik Tae
- Issue Date
- 2017-01
- Citation
- Applied Physics Letters, v.110, no.3, pp.1-5
- ISSN
- 0003-6951
- Publisher
- American Institute of Physics (AIP)
- Language
- English
- Type
- Journal Article
- Abstract
- This study reports on the synthesis and characterization of conducting polyaniline (PANI) thin films when using advanced atmospheric pressure plasma jets (APPJs). A simple method for synthesizing conducting polymers (CPs) with humidity-independent characteristics is introduced using advanced APPJs and an in-situ iodine doping method. In the case of ex-situ I2 doping, a humidity effect study showed that increasing the relative humidity produced significant changes in the electrical resistance (R) of the PANI, indicating strong humidity-dependent characteristics similar to conventional CPs. In contrast, in the case of in-situ I2 doping, the R and sensitivity of the PANI remained essentially unchanged when increasing the relative humidity, except for a very low sensitivity of 0.5% under 94% relative humidity. In addition, the R for the PANI with in-situ I2 doping showed no aging effect, while the R for the ex-situ-doped PANI increased dramatically over time. Thus, it is anticipated that the use of in-situ doping during plasma polymerization can be widely used to design stable and high-performance CPs with humidity-independent characteristics for a variety of applications.
- KSP Keywords
- Atmospheric pressure plasma polymerization, Conducting polyaniline films, Conducting polymers, Doping method, Electrical Resistance, Ex-situ, High performance, Humidity effect, In-situ doping, Over time, Relative Humidity