1 research outputs found
Simple Synthesis of Monodisperse, Quasi-spherical, Citrate-Stabilized Silver Nanocrystals in Water
Monodisperse,
quasi-spherical silver nanocrystals (Ag NCs) have
been produced directly in water via adding the aqueous solution of
a mixture of AgNO<sub>3</sub>, sodium citrate, and KI into the boiling
aqueous solutions of ascorbic acid (AA). The AA is used to significantly
accelerate reduction of AgNO<sub>3</sub> in order to promote a very
fast nucleation, and the KI is used to tailor the growth of the Ag
NCs into a quasi-spherical shape via its preferential adsorption on
the NC {111} facets. The major role of citrate is to stabilize the
newly formed NCs, whereas it has a minor contribution to reduction
of AgNO<sub>3</sub>. The synergy of the effects of AA, citrate, and
KI can significantly narrow the size distributions of the Ag NCs obtained
so and transform the NC shapes to be truly quasi-spherical