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http://dx.doi.org/10.5012/jkcs.2017.61.4.191

Preparation and Characterization of Thiolate-Protected Gold Nanoparticles Using Modified One-Phase Method  

Park, Jisu (Department of Chemistry, College of Natural Sciences, Dankook University)
Kim, Youhyuk (Department of Chemistry, College of Natural Sciences, Dankook University)
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Abstract
One-phase method to prevent the initial formation of Ag(I) thiolate layered materal from the mixture of $AgNO_3$ and thiols was previously developed to generate TP (Thiolate-Protected)-nanosilver. In this modified method, $AgNO_3$ is added to the mixtures of $NaBH_4$ and thiols in ethanol. This method was so successful that it was applied to synthesize TP-nanogold and nanoplatinum. The synthesis and characterization of these nanoparticles by ultraviolet-visible (UV-vis) absorption spectra, transmission electron microscopy (TEM) pictures, X-ray powder differaction (XRD) patterns and infrared(IR) spectra are described. The results show that colloidal nanoparticles are spherical or oval shape and the mean sizes for TP-nanogold and nanoplatinum are about 3~7 nm and below 2 nm, respectively. The conformation of polymethylene [$-(CH_2)_7-$] sequence in octanethiolate attached to nanogold was elucidated as trans.
Keywords
TP(Thiolate-Protected)-; Nanoparticles; One phase synthetic method; Conformation of polymethylene;
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