상세정보
학술지
Colorimetric Quantitative Sensing of Alkali Metal Ions Based on Reversible Assembly and Disassembly of Gold Nanoparticles
- 발행일
- 201311
- 출처
- Current Applied Physics, v.13 no.9, pp.1889-1893
- ISSN
- 1567-1739
- 출판사
- Elsevier
- 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.
- KSP 제안 키워드
- Alkali metal ions, Assembly and disassembly, Assembly processes, Au nanoparticles(Au-NPs), Colloidal Au, Color changes, Critical concentration, Ionic radii, Metal ion concentration, Nanoparticle size, Reversible self-assembly