Journal ArticleDOI
Gold Nanoparticle-Catalyzed Luminol Chemiluminescence and Its Analytical Applications
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Gold colloids with nanoparticles of different sizes were found to enhance the chemiluminescence (CL) of the luminol-H2O2 system, and the most intensive CL signals were obtained with 38-nm-diameter gold nanoparticles.Abstract:
Gold colloids with nanoparticles of different sizes were found to enhance the chemiluminescence (CL) of the luminol-H2O2 system, and the most intensive CL signals were obtained with 38-nm-diameter gold nanoparticles. UV-visible spectra, X-ray photoelectron spectra, and transmission electron microscopy studies were carried out before and after the CL reaction to investigate the CL enhancement mechanism. The CL enhancement by gold nanoparticles of the luminol-H2O2 system was supposed to originate from the catalysis of gold nanoparticles, which facilitated the radical generation and electron-transfer processes taking place on the surface of the gold nanoparticles. The effects of the reactant concentrations, the size of the gold nanoparticles. and some organic compounds were also investigated. Organic compounds containing OH, NH2, and SH groups were observed to inhibit the CL signal of the luminol-H2O2-gold colloids system, which made it applicable for the determination of such compounds.read more
Citations
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Aptamers from Cell-Based Selection for Bioanalytical Applications
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Nanomaterial-based amplified transduction of biomolecular interactions.
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Intrinsic catalytic activity of Au nanoparticles with respect to hydrogen peroxide decomposition and superoxide scavenging.
Weiwei He,Yu-Ting Zhou,Yu-Ting Zhou,Wayne G. Wamer,Xiaona Hu,Xiaochun Wu,Zhi Zheng,Mary D. Boudreau,Jun-Jie Yin +8 more
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References
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Journal ArticleDOI
Controlled nucleation for the regulation of the particle size in monodisperse gold suspensions
TL;DR: In this article, a series of monodisperse suspensions of the same chemical composition but of rather different particle sizes was used to study particle size dependent phenomena, such as Brownian motion, light scattering, sedimentation and electrophoresis of small particles.
Journal ArticleDOI
Monolayer-Protected Cluster Molecules
TL;DR: The present state of the rapidly emerging field of monolayer-protected cluster (MPC) molecules with regard to their synthesis andmonolayer functionalization, their core and monolayers structure, their composition, and their properties is evaluated.
Journal ArticleDOI
On the origin of the catalytic activity of gold nanoparticles for low-temperature CO oxidation
Núria López,Ton V. W. Janssens,Clausen Bjerne Steffen,Ye Xu,Manos Mavrikakis,Thomas Bligaard,Jens K. Nørskov +6 more
TL;DR: In this paper, it is suggested that there may be several effects contributing to the catalytic properties of supported nanosized gold particles, and that it is useful to order them in a hierarchy.
Journal ArticleDOI
Selective Vapor-Phase Epoxidation of Propylene over Au/TiO2Catalysts in the Presence of Oxygen and Hydrogen
TL;DR: In this article, it was shown that propylene adsorbed on a gold surface may react with oxygen species formed at the perimeter interface between the gold particles and the TiO2support through the reaction of oxygen with hydrogen.
Journal ArticleDOI
Gold on Carbon as a New Catalyst for Selective Liquid Phase Oxidation of Diols
Laura Prati,Michele Rossi +1 more
TL;DR: In this article, gold-based catalysts have been used for catalytic diol conversion to α-hydroxy carboxylates with dioxygen in an alkaline solution.