Size-controlled synthesis of colloidal gold nanoparticles at room temperature under the influence of glow discharge.

Nanoscale Research Letters
Xi LiangChang-Jun Liu

Abstract

Highly dispersed colloidal gold (Au) nanoparticles were synthesized at room temperature using glow discharge plasma within only 5 min. The prepared Au colloids were characterized with UV-visible absorption spectra (UV-vis), X-ray photoelectron spectroscopy (XPS), and transmission electron microscopy (TEM) equipped with an energy dispersion X-ray spectrometer (EDX). UV-vis, XPS and EDX results confirmed that Au3+ ions in HAuCl4 solution could be effectively reduced into the metallic state at room temperature with the glow discharge plasma. TEM images showed that Au nanoparticles were highly dispersed. The size of colloidal Au nanoparticles could be easily tuned in the nanometer range by adjusting the initial concentration of HAuCl4 solution. Moreover, the as-synthesized Au colloids (dav = 3.64 nm) exhibited good catalytic activity for glucose oxidation. The nucleation and growth of colloidal Au particles under the influence of the plasma was closely related with the high-energy electrons generated by glow discharge plasma.

References

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Citations

Jun 30, 2011·Nanoscale Research Letters·Joseph K YoungRebekah A Drezek
Apr 14, 2015·Chemistry : a European Journal·Aila Jimenez-RuizRafael Prado-Gotor
May 23, 2012·Langmuir : the ACS Journal of Surfaces and Colloids·Yaolin XuYuping Bao
Dec 16, 2020·The Journal of Physical Chemistry. a·Totan MondalHaya Kornweitz

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