title: Effect of aggregated silver nanoparticles on luminol chemiluminescence system and its analytical application.
abstract: We found that after silver nanoparticles (AgNPs) aggregated, its catalytic activity on luminol CL reaction obviously changed, and the change characteristic was closely related to the sizes of AgNPs. UV-visible spectra, X-ray photoelectron spectra, zeta potential and transmission electron microscopy studies were carried out to investigate the CL effect mechanism. The different CL responses of aggregated AgNPs with different size were suggested to be due to the two effects of quantum size and electron density in nanoparticle's conduction bands, and which one played a major role. The poisonous organic contaminants such as anilines, could induce the aggregation of AgNPs, were observed to affect effectively the luminol-H2O2-7 nm and 15 nm AgNPs CL systems and were detectable by use of a flow injection method with the enhanced or inhibited CL detection.
authors.affiliation: Department of Environment and Equipment Engineering, Fujian University of Technology, Fuzhou 350108, PR China; Key Laboratory of Analytical Chemistry for Life Science of Shaanxi Province, School of Chemistry & Chemical Engineering, Shaanxi Normal University, Xi'an 710062, PR China.
authors.forename: Yingying
authors.initials: Y
authors.lastname: Qi
authors.affiliation: Key Laboratory of Analytical Chemistry for Life Science of Shaanxi Province, School of Chemistry & Chemical Engineering, Shaanxi Normal University, Xi'an 710062, PR China. Electronic address: libaoxin@snnu.edu.cn.
authors.forename: Baoxin
authors.initials: B
authors.lastname: Li
authors.affiliation: Department of Environment and Equipment Engineering, Fujian University of Technology, Fuzhou 350108, PR China.
authors.forename: Furong
authors.initials: F
authors.lastname: Xiu
mesh_terms: D000814:Aniline Compounds / Q000032:analysis* / Q000737:chemistry; D008163:Luminescent Measurements / Q000379:methods*; D008165:Luminol / Q000737:chemistry*; D053768:Metal Nanoparticles / Q000737:chemistry* / Q000648:ultrastructure; D010316:Particle Size; D012834:Silver / Q000737:chemistry*
chemical_list: D000814:Aniline Compounds; D012834:Silver; D008165:Luminol
keywords: Aggregated silver nanoparticles; Catalysis; Chemiluminescence; Luminol