TY - JOUR
T1 - Synthesis of positively charged gold nanoparticles using a stainless-steel mesh
AU - Han, Thi Hiep
AU - Khan, Mohammad Mansoob
AU - Kalathil, Shafeer
AU - Lee, Jintae
AU - Cho, Moo Hwan
PY - 2013/9/1
Y1 - 2013/9/1
N2 - A novel, rapid, one-pot, and facile approach was developed to synthesize positively charged gold nanoparticles [(+) AuNPs] by employing an aqueous solution of HAuCl4 ·3H2O as a precursor at 30 °C and a stainless-steel mesh as a reducing agent. The penetration of Cl- ions into the stainlesssteel surface results in corrosion on the stainless-steel surface and excretion of electrons which are used for reduction of Au3+ → Au0. As a result, (+) AuNPs 5-20 nm 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+ → Au0, makes it a novel material for (+) AuNPs synthesis.
AB - A novel, rapid, one-pot, and facile approach was developed to synthesize positively charged gold nanoparticles [(+) AuNPs] by employing an aqueous solution of HAuCl4 ·3H2O as a precursor at 30 °C and a stainless-steel mesh as a reducing agent. The penetration of Cl- ions into the stainlesssteel surface results in corrosion on the stainless-steel surface and excretion of electrons which are used for reduction of Au3+ → Au0. As a result, (+) AuNPs 5-20 nm 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+ → Au0, makes it a novel material for (+) AuNPs synthesis.
KW - Positively charged gold nanoparticles
KW - Stainless steel
KW - Zeta potential
U2 - 10.1166/jnn.2013.7660
DO - 10.1166/jnn.2013.7660
M3 - Article
AN - SCOPUS:84879350886
VL - 13
SP - 6140
EP - 6144
JO - Journal of Nanoscience and Nanotechnology
JF - Journal of Nanoscience and Nanotechnology
SN - 1533-4880
IS - 9
ER -