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학술지 Colorimetric Quantitative Sensing of Alkali Metal Ions Based on Reversible Assembly and Disassembly of Gold Nanoparticles
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저자
아칠성, 김완중, 윤완수, 주상우
발행일
201311
출처
Current Applied Physics, v.13 no.9, pp.1889-1893
ISSN
1567-1739
출판사
Elsevier
DOI
https://dx.doi.org/10.1016/j.cap.2013.07.026
협약과제
13VB1900, 에너지 절감을 위한 7인치기준 2W급 환경적응 디스플레이 신모드 핵심 원천 기술 개발, 추혜용
초록
A novel and simple method for the colorimetric quantitative sensing of individual alkali metal ions (Li+, Na+, K+, and Rb+) based on the reversible properties of self-assembled aggregates and individual gold nanoparticles (Au NPs) is described. This paper demonstrates reversible self-assembly processes where the degree of assembly and disassembly is dependent on the individual alkali metal ion concentration, nanoparticle size, and alkali metal ionic radii. The color changes of the colloidal Au NPs with metal ion concentrations in colloidal NP solutions occur reversibly. Below a certain concentration of alkali metal ions, the aggregates of Au NPs are redispersed. As the Au NP diameters and the alkali metal ionic radii increase, the critical concentration decreases. © 2013 Elsevier B.V.
키워드
Alkali metal ion sensing, Colorimetric, Gold nanoparticle, Quantitative, Reversible assembly and disassembly
KSP 제안 키워드
Alkali metal ions, Assembly and disassembly, Au nanoparticles(Au-NPs), Colloidal Au, Color changes, Critical concentration, Ionic radii, Metal ion concentration, Metal ion sensing, Nanoparticle size, Reversible self-assembly