TY - JOUR
T1 - Rapid and high-yield synthesis of silver nanowires using air-assisted polyol method with chloride ions
AU - Tang, Xinling
AU - Tsuji, Masaharu
AU - Jiang, Peng
AU - Nishio, Michiko
AU - Jang, Sang Min
AU - Yoon, Seong Ho
N1 - Funding Information:
This work was supported by the Joint Project of Chemical Synthesis Core Research Institutions, and a Grant-in-Aid for Scientific Research on Priority Areas “Unequilibrium electromagnetic heating” and Grant-in-Aid for Scientific Research (B) from the Ministry of Education, Culture, Sports, Science, and Technology of Japan (Nos. 19033003 and 19310064). We thank IMCE, Kyushu University for financial support to Prof. P. Jiang as a visiting professor during April to June 2007.
PY - 2009/4/15
Y1 - 2009/4/15
N2 - Effects of gas bubbling were studied for synthesis of silver nanostructures from a mixture of AgNO3/NaCl/poly(vinylpyrrolidone) (PVP) in ethylene glycol (EG). Monodispersed silver nanowires were synthesized under oil-bath heating in high yield (>90% without isolation) using bubbling of air through a reagent solution from ca. 20 °C to the boiling point of EG (198 °C) for 20 min. On the other hand, mixtures of cubes, bipyramids, and wires were prepared under bubbling of N2. The Ag nanostructures' growth mechanism was studied by observing ultraviolet-visible (UV-vis) spectra and transmission electron microscope (TEM) images at various temperatures. Results show that the formation process of Ag nanostructures under gas bubbling is separable into two stages: a low temperature range of 20-180 °C at 0-17 min, where mixtures of variously shaped Ag seeds are produced independent of the bubbling gas; and a high temperature range of 180-198 °C at 17-20 min, where rapid growth of nanowires and oxidative etching of cubes and bipyramids by Cl-/O2 occur simultaneously in bubbling of air, thereby producing long nanowires in high yield. Because the etching process is absent during processing by bubbling of N2, mixtures of shorter nanowires, cubes, and bipyramids are produced.
AB - Effects of gas bubbling were studied for synthesis of silver nanostructures from a mixture of AgNO3/NaCl/poly(vinylpyrrolidone) (PVP) in ethylene glycol (EG). Monodispersed silver nanowires were synthesized under oil-bath heating in high yield (>90% without isolation) using bubbling of air through a reagent solution from ca. 20 °C to the boiling point of EG (198 °C) for 20 min. On the other hand, mixtures of cubes, bipyramids, and wires were prepared under bubbling of N2. The Ag nanostructures' growth mechanism was studied by observing ultraviolet-visible (UV-vis) spectra and transmission electron microscope (TEM) images at various temperatures. Results show that the formation process of Ag nanostructures under gas bubbling is separable into two stages: a low temperature range of 20-180 °C at 0-17 min, where mixtures of variously shaped Ag seeds are produced independent of the bubbling gas; and a high temperature range of 180-198 °C at 17-20 min, where rapid growth of nanowires and oxidative etching of cubes and bipyramids by Cl-/O2 occur simultaneously in bubbling of air, thereby producing long nanowires in high yield. Because the etching process is absent during processing by bubbling of N2, mixtures of shorter nanowires, cubes, and bipyramids are produced.
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U2 - 10.1016/j.colsurfa.2008.12.029
DO - 10.1016/j.colsurfa.2008.12.029
M3 - Article
AN - SCOPUS:60649113192
SN - 0927-7757
VL - 338
SP - 33
EP - 39
JO - Colloids and Surfaces A: Physicochemical and Engineering Aspects
JF - Colloids and Surfaces A: Physicochemical and Engineering Aspects
IS - 1-3
ER -