Synthesis and growth mechanism of selenium nanowire bundles via a polymer-controlled chemical route.
This article describes a polymer-controlled chemical method for synthesis of trigonal selenium (t-Se) nanowire bundles in the presence of poly(vinyl alcohol) (PVA) at 100 degrees C. Electron microscope images show that Se nanowires have diameters of 30-50 nm and lengths of up to a few tens of micrometers. TEM images display the direct evidence for the growth process of single-crystalline Se nanowire bundles, which suggested that Se nanowire bundles were directly converted from the initial amorphous Se micro-particles in the presence of PVA. UV-Vis absorbance of t-Se nanowire bundles revealed that the bandgap and absorbance peaks displayed larger blue shifts relative to those of bulk t-Se.
Department of Chemistry, Hefei National Laboratory for Physical Science at Microscale, University of Science and Technology of China, Hefei, Anhui 230026, P R China.
Qin
Q
Xie
Jianwei
J
Liu
Jianbo
J
Liang
Weichao
W
Yu
Yitai
Y
Qian
D003460:Crystallization / Q000379:methods*; D004559:Electric Wiring; D008422:Materials Testing; D036103:Nanotechnology / Q000379:methods*; D043942:Nanotubes / Q000737:chemistry* / Q000648:ultrastructure*; D010316:Particle Size; D011108:Polymers / Q000737:chemistry; D011142:Polyvinyl Alcohol / Q000737:chemistry*; D012643:Selenium / Q000737:chemistry*
D011108:Polymers; D011142:Polyvinyl Alcohol; D012643:Selenium