Journal
JOURNAL OF NANOSCIENCE AND NANOTECHNOLOGY
Volume 13, Issue 9, Pages 6140-6144Publisher
AMER SCIENTIFIC PUBLISHERS
DOI: 10.1166/jnn.2013.7660
Keywords
Positively Charged Gold Nanoparticles; Zeta Potential; Stainless Steel
Categories
Funding
- Ministry of Education, Science, and Technology (MEST)
- National Research Foundation of Korea (NRF)
- Human Resources Development Program (R&D Workforce Cultivation Track for Solar-Cell Materials and Processes) through a Korea Institute of Energy Technology Evaluation and Planning (KETEP) grant
- Korean Ministry of Knowledge Economy
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A novel, rapid, one-pot, and facile approach was developed to synthesize positively charged gold nanoparticles [(+) AuNPs] by employing an aqueous solution of HAuCl4 center dot 3H(2)Oas a precursor at 30 degrees C and a stainless-steel mesh as a reducing agent. The penetration of Cl- ions into the stainless-steel surface results in corrosion on the stainless-steel surface and excretion of electrons which are used for reduction of Au3+ -> Au-0. As a result, (+) AuNPs 5-20 nnn in size, mostly monodispersed, were synthesized within 3 h. The as-synthesized AuNPs were charaterized by UV-vis, DLS, XRD, TEM, HR-TEM, EDX and SAED. The utilization of non-toxic chemicals and easily available materials, and the non-requirement of energy input, make this methodology easy, inexpensive, and efficient. The new findings about the role of the stainless-steel mesh, which provides electrons in the presence of Cl- ions, for the reduction of Au3+ -> Au-0, makes it a novel material for (+) AuNPs synthesis.
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