文摘
One-dimensional silver nanowires with uniform diameters and different aspect ratios grown in large scale have been synthesized by self-seeding polyol process. The microstructure of Ag nanowires was tested by XRD, SEM, and TEM. The different growth process of the Ag nanowires has been traced by UV8211;visible absorption spectra and SEM. The X-ray photoelectron spectroscopy investigation and Raman spectra further show that the PVP molecules are adsorbed on the surface of Ag nanowires through Ag:O coordination. A possible growth mechanism of the Ag nanowires has been proposed. It is implied that the PVP molecules are used as both a protecting agent and a structure-directing agent for the growth of Ag nanowires. The results indicate that the selective adsorption of PVP on the side surfaces of {100} and the end surfaces of {111} plays a crucial role for the growth of the anisotropic silver nanostructures.