Premium
Optical Reading of Contaminants in Aqueous Media Based on Gold Nanoparticles
Author(s) -
Du Jianjun,
Zhu Bowen,
Peng Xiaojun,
Chen Xiaodong
Publication year - 2014
Publication title -
small
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 3.785
H-Index - 236
eISSN - 1613-6829
pISSN - 1613-6810
DOI - 10.1002/smll.201303256
Subject(s) - aqueous medium , colloidal gold , nanotechnology , materials science , environmental science , nanoparticle , computer science , biochemical engineering , aqueous solution , chemistry , engineering
With increasing trends of global population growth, urbanization, pollution over‐exploitation, and climate change, the safe water supply has become a global issue and is threatening our society in terms of sustainable development. Therefore, there is a growing need for a water‐monitoring platform with the capability of rapidness, specificity, low‐cost, and robustness. This review summarizes the recent developments in the design and application of gold nanoparticles (AuNPs) based optical assays to detect contaminants in aqueous media with a high performance. First, a brief discussion on the correlation between the optical reading strategy and the optical properties of AuNPs is presented. Then, we summarize the principle behind AuNP‐based optical assays to detect different contaminants, such as toxic metal ion, anion, and pesticides, according to different optical reading strategies: colorimetry, scattering, and fluorescence. Finally, the comparison of these assays and the outlook of AuNP‐based optical detection are discussed.