Papers by Author: Xiao Wei Di

Abstract: Biomolecule functionalized gold nanoparticles offer a broad range of applications in biomedical and bioanalytical areas. In this work, we investigated the spectroscopy behavior of gold nanoparticles modified with mercapto amino acid, cysteine. We found that the interaction of gold nanoparticles with cysteine resulted in a shift in the plasmon bands to higher wavelengths at the lower concentration of cysteine and in acidity solution.

Abstract: P₂O₅/CaCl₂/Fe₃O₄ composite catalysts for the esterification of oleic acid was proposed. Optimum conditions for the esterification of oleic acid to produce methyl ester of oleic acid were investigated which yielded a maximum conversion of oleic acid to the methyl ester. The variables were: 1) temperature and time of reaction; 2) amounts of catalyst and 3) ratio of alcohol to fatty acid.