Colorimetric Effect of Au Nanoparticle Chain/Polymer Film under Mechanical Stress and Gas Pressure
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- 2023.04.05
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- 2018.01
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서지정보
ㆍ발행기관 : 한국재료학회
ㆍ수록지정보 : 한국재료학회지 / 28권 / 1호
ㆍ저자명 : Gowoon Shim, Kiryung Eom, Gyuyeon Lee, Hyungtak Seo
목차
1. Introduction
2. Experimental procedure
2.1 Synthesis of Au NPs
2.2 Assembly of Au NP chains
2.3 Fabrication of Au films
2.4 Compression test
2.5 Stretching test
2.6 Gas pressurization
2.7 Characterization
3. Results and Discussion
4. Conclusion
Acknowledgement
References
영어 초록
Gas detection is necessary for various reasons, including the prevention of gas leakages and the creation of necessary environmental conditions. Among the gas detection methods, leakage of gas can be confirmed using materials that undergo color changes that are easily distinguished by the naked eye. Metal nanoparticles (NPs) experience variations in their absorption wavelengths under the localized surface plasmon effect (LSPR) with mechanical stresses, which change the distance between NPs. In this study, we attempted to detect the presence of gas utilizing the LSPR-related color change of a chain of Au NPs. The assembly of Au NPs, arranged in a chain shape, experienced a color change from dark blue to purple with a change in the distance between the NPs by applying a physical force, i.e., compression, stretching, and gas pressure. As the force of compression and the degree of stretching increased, the absorption wavelength shifted from doublet peaks at 650 and 550 nm to a singlet peak at 550 nm. Further, applying gas pressure caused an identical color change. With this result, we propose a method that could be applied to all gases that require detection based on gas pressure.
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