Abstract
Water-soluble CdS nanocrystals (NCs) capped with mercaptoacetic acid (MA) weresynthesized in aqueous solution. Hydrogen peroxide directly oxidized the MA-capped CdSNCs and produced strong chemiluminescence (CL) emission in basic conditions. It wasfound that the CL of CdS NCs was size-dependent, and the CL intensity increased withincreasing CdS NCs size. UV–visible spectra, CL spectra, photoluminescence (PL) spectra,and transmission electron microscopy (TEM) were used to investigate the CLreaction mechanism. Moreover, the effects of reactant concentrations, surfactants,and some biological molecules and metal ions were carefully investigated. Somebiological molecules and metal ions were observed to inhibit the CL signal of theH2O2–CdS NCs system, which makes it applicable for the detection of such species.
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