School of Materials Science and Engineering, Nanyang Technological University, 50 Nanyang Avenue, 639798 Singapore, Singapore, Website: http://www.ntu.edu.sg/home/chenxd/
Small. 2012 Nov 19;8(22):3412-6. doi: 10.1002/smll.201201650. Epub 2012 Aug 23.
A fast and simple colorimetric detection system for sulfite, based on diazonium-gold-nanoparticle(AuNP) complexation, has high selectivity and sensitivity in aqueous media. The positively charged diazonium has affinity for the AuNP surface due to an electrostatic effect, which prevents AuNPs from aggregating in highly saline solutions. Upon addition of sulfite, the AuNPs are free to aggregate due to the formation of a neutral and insoluble phenylhydrazine derivative.
一种基于重氮-金纳米粒子(AuNP)络合的快速简单的比色检测亚硫酸盐的方法，在水介质中具有高选择性和灵敏度。带正电荷的重氮由于静电效应而对 AuNP 表面具有亲和力，这防止了 AuNP 在高盐溶液中聚集。当加入亚硫酸盐时，由于形成中性且不溶的苯肼衍生物，AuNP 可以自由聚集。
