Record number :
Title of article :
Manipulation of silver nanostructures using supercritical fluids in the presence of polyvinylpyrrolidone and ethylene glycol
Author/Authors :
Cheng، نويسنده , , Wen-Tung and Chih، نويسنده , , Yu-Wen، نويسنده ,
Issue Information :
روزنامه با شماره پیاپی سال 2010
Pages :
From page :
To page :
Abstract :
This study reports on a new method for manipulating the size and shape of silver nanostructures using supercritical carbon dioxide (CO2) in the presence of polyvinyl pyrrolidone (PVP) and ethylene glycol (EG). The temperature and pressure of CO2 as well as the ratio of the capping agent PVP to the precursor of silver nitrate are used to control the growth of the silver nuclei and grains during the synthesis of silver nanostructures in ethylene glycol. The as-synthesized nanostructures were characterized by UV–vis spectroscopy, transmission electron microscopy (TEM), field emission scanning electron microscopy (FESEM), atomic force microscopy (AFM), and X-ray powder diffraction (XRD). The results indicate that the aspect ratio of silver nanostructures, in particular, increases with an increase in the temperature and pressure of supercritical CO2 from 3.5 to 50.
Keywords :
manipulation , Silver nanostructure , Polyol process , Polymeric capping agent , Supercritical fluid
Journal title :
Journal of Supercritical Fluids
Journal title :
Journal of Supercritical Fluids
Serial Year :
Link To Document :