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KMID : 1059520170610040191
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Journal of the Korean Chemical Society
2017 Volume.61 No. 4 p.191 ~ p.196
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Preparation and Characterization of Thiolate-Protected Gold Nanoparticles Using Modified One-Phase Method
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Park Ji-Su
Kim You-Hyuk
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Abstract
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One-phase method to prevent the initial formation of Ag(I) thiolate layered materal from the mixture of AgNO3 and thiols was previously developed to generate TP (Thiolate-Protected)-nanosilver. In this modified method, AgNO3 is added to the mixtures of NaBH4 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 [-(CH2)7-] sequence in octanethiolate attached to nanogold was elucidated as trans.
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KEYWORD
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TP(Thiolate-Protected)-, Nanoparticles, One phase synthetic method, Conformation of polymethylene
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