L-cysteine functionalized gold nanoparticles for the colorimetric detection of Hg2+ induced by ultraviolet light.
A simple, cost-effective yet rapid and sensitive colorimetric sensor for the detection of Hg(2+) using L-cysteine functionalized gold nanoparticles induced by ultraviolet radiation was developed. The sensitivity and selectivity of detection was also investigated. The L-cysteine modified gold nanoparticles can be induced to aggregate quickly in the presence of Hg(2+), especially with the assistance of ultraviolet radiation. The presence of Hg(2+) can be monitored by the colorimetric response of gold nanoparticles. The detection of Hg(2+) could be realized, after measuring the UV-vis spectra, with a detection limit of 100 nM. The selectivity of this method has been investigated by other divalent metal ions. The effective colorimetric sensor can be used for on-site and real-time Hg(2+) detection.
Chai
Fang
F
Institute of Functional Material Chemistry, Faculty of Chemistry, Northeast Normal University, Changchun, People's Republic of China.
Wang
Chungang
C
Wang
Tingting
T
Ma
Zhanfang
Z
Su
Zhongmin
Z
D003124:Colorimetry / Q000295:instrumentation*; D003545:Cysteine / Q000737:chemistry* / Q000528:radiation effects; D004867:Equipment Design; D019544:Equipment Failure Analysis; D006046:Gold / Q000737:chemistry* / Q000528:radiation effects; D008628:Mercury / Q000032:analysis* / Q000737:chemistry / Q000528:radiation effects; D053758:Nanoparticles / Q000737:chemistry* / Q000528:radiation effects; D036103:Nanotechnology / Q000295:instrumentation*; D014159:Transducers; D014466:Ultraviolet Rays
D006046:Gold; D008628:Mercury; D003545:Cysteine