title: Colorimetric detection of sulfide based on target-induced shielding against the peroxidase-like activity of gold nanoparticles.
abstract: Colorimetric recognition and sensing of sulfide with high sensitivity was proposed based on target-induced shielding against the peroxidase-like activity of bare gold nanoparticles. Significant features of the new assay system are its simplicity and cost-effectiveness. The recognition of sulfide by bare gold nanoparticles can be fulfilled in a few seconds and the assay can be accomplished in about 10 min. Furthermore, the new assay system does not require surface modification of GNPs to obtain the specificity for sulfide, and a salt-induced aggregation step is not needed. The detection limit of this method for sulfide was 80 nM. These features make this sensor a potentially powerful tool for the quantitative determination of sulfide in water samples.
authors.affiliation: Department of Pharmaceutical Analysis, School of Pharmacy, Fujian Medical University, Fuzhou 350004, China; Nano Medical Technology Research Institute, Fujian Medical University, Fuzhou 350004, China.
authors.forename: Hao-Hua
authors.initials: HH
authors.lastname: Deng
authors.affiliation: Department of Pharmaceutical Analysis, School of Pharmacy, Fujian Medical University, Fuzhou 350004, China; Nano Medical Technology Research Institute, Fujian Medical University, Fuzhou 350004, China.
authors.forename: Shao-Huang
authors.initials: SH
authors.lastname: Weng
authors.affiliation: Department of General Chemistry, School of Pharmacy, Fujian Medical University, Fuzhou 350004, China.
authors.forename: Shuang-Lu
authors.initials: SL
authors.lastname: Huang
authors.affiliation: Department of Pharmaceutical Analysis, School of Pharmacy, Fujian Medical University, Fuzhou 350004, China; Nano Medical Technology Research Institute, Fujian Medical University, Fuzhou 350004, China.
authors.forename: Ling-Na
authors.initials: LN
authors.lastname: Zhang
authors.affiliation: Department of Pharmaceutical Analysis, School of Pharmacy, Fujian Medical University, Fuzhou 350004, China; Nano Medical Technology Research Institute, Fujian Medical University, Fuzhou 350004, China.
authors.forename: Ai-Lin
authors.initials: AL
authors.lastname: Liu
authors.affiliation: Department of Pharmaceutical Analysis, School of Pharmacy, Fujian Medical University, Fuzhou 350004, China; Nano Medical Technology Research Institute, Fujian Medical University, Fuzhou 350004, China.
authors.forename: Xin-Hua
authors.initials: XH
authors.lastname: Lin
authors.affiliation: Department of Pharmaceutical Analysis, School of Pharmacy, Fujian Medical University, Fuzhou 350004, China; Nano Medical Technology Research Institute, Fujian Medical University, Fuzhou 350004, China. Electronic address: chenandhu@163.com.
authors.forename: Wei
authors.initials: W
authors.lastname: Chen
mesh_terms: D001560:Benzidines / Q000737:chemistry; D003124:Colorimetry / Q000191:economics / Q000379:methods*; D006046:Gold / Q000737:chemistry*; D057230:Limit of Detection; D053768:Metal Nanoparticles / Q000737:chemistry*; D010544:Peroxidases / Q000737:chemistry*; D013440:Sulfides / Q000032:analysis*; D014867:Water / Q000032:analysis
chemical_list: D001560:Benzidines; D013440:Sulfides; D014867:Water; C021758:3,3',5,5'-tetramethylbenzidine; D006046:Gold; D010544:Peroxidases
keywords: 3,3′,5,5′-Tetramethylbenzidine; Colorimetric sensor; Gold nanoparticles; Peroxidase-like activity; Sulfide