Investigation of Morphology and Structure of Poly(ethylene glycol)-Coated Silver Nanowires by Electron Microscopy
10.3724/SP.J.1096.2010.00149
- VernacularTitle:电子显微镜技术表征聚乙二醇包覆的银纳米线的显微结构特征
- Author:
Lijian HUANG
;
Erkang WANG
- Publication Type:Journal Article
- Keywords:
Silver nanowires;
Electron microscopy;
Structure characterization;
Fivefold twinned structure
- From:
Chinese Journal of Analytical Chemistry
2010;38(2):149-152
- CountryChina
- Language:Chinese
-
Abstract:
Poly(ethylene glycol)(PEG) coated silver nanowires has been hydrothermally prepared at a very slow rate, in which PEG was used as both a mild capping agent and a weak reductant. As-prepared silver nanowires(SNWs) have been characterized using scanning electron microscopy) and transmission electron microscope), which showed that the SNWs are usually longer than 100 μm and their diameters(each SNW has a uniform thickness) vary mainly in the range of 80～300 nm. Surprisingly, some of these silver nanowires connected) by their two ends to form some close-looped silver nanowires, which hitherto has not been reported elsewhere. The existence of close-looped silver nanowires supports the mechanism that nanowires can evolve from fusion of some nanoparticles and/or shorter nanorods. Careful TEM characterization and selected area electron) diffraction revealed that the silver nanowires kept a five-fold twinned structure, which is opposite to some reports) that a long-time incubation will lead to the disappearance of this twin structure. This work demonstrates the situation that deeper investigation is still needed for understanding the structure transformation of silver) nanowires.
