Colorimetric quantitative sensing of alkali metal ions based on reversible assembly and disassembly of gold nanoparticles
- Authors
- Ah, Chil Seong; Kim, Wan-Joong; Yun, Wan Soo; Joo, Sang-Woo
- Issue Date
- Nov-2013
- Publisher
- ELSEVIER SCIENCE BV
- Keywords
- Alkali metal ion sensing; Reversible assembly and disassembly; Gold nanoparticle; Colorimetric; Quantitative
- Citation
- CURRENT APPLIED PHYSICS, v.13, no.9, pp.1889 - 1893
- Journal Title
- CURRENT APPLIED PHYSICS
- Volume
- 13
- Number
- 9
- Start Page
- 1889
- End Page
- 1893
- URI
- http://scholarworks.bwise.kr/ssu/handle/2018.sw.ssu/11123
- DOI
- 10.1016/j.cap.2013.07.026
- ISSN
- 1567-1739
- Abstract
- 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. (C) 2013 Elsevier B. V. All rights reserved.
- Files in This Item
- There are no files associated with this item.
- Appears in
Collections - College of Natural Sciences > Department of Chemistry > 1. Journal Articles
![qrcode](https://api.qrserver.com/v1/create-qr-code/?size=55x55&data=https://scholarworks.bwise.kr/ssu/handle/2018.sw.ssu/11123)
Items in ScholarWorks are protected by copyright, with all rights reserved, unless otherwise indicated.