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Synthesis and evolution of PbS nanocrystals through a surfactant-assisted solvothermal route.

Authors
  • Zhang, Chao
  • Kang, Zhenhui
  • Shen, Enhong
  • Wang, Enbo
  • Gao, Lei
  • Luo, Fang
  • Tian, Chungui
  • Wang, Chunlei
  • Lan, Yang
  • Li, Jixue
  • Cao, Xuejing
Type
Published Article
Journal
The Journal of Physical Chemistry B
Publisher
American Chemical Society
Publication Date
Jan 12, 2006
Volume
110
Issue
1
Pages
184–189
Identifiers
PMID: 16471519
Source
Medline
License
Unknown

Abstract

We present a surfactant-assisted solvothermal approach for the controllable synthesis of a PbS nanocrystal at low temperature (85 degrees C). Nanotubes (400 nm in length with an outer diameter of 30 nm), bundle-like long nanorods (about 5-15 mum long and an average diameter of 100 nm), nanowires (5-20 mum in length and with a diameter of 20-50 nm), short nanorods (100-300 nm in length and an axial ratio of 5-10), nanoparticles (25 nm in width with an aspect ratio of 2), and nanocubes (a short axis length of 10 nm and a long axis length of 15 nm) were successfully prepared and characterized by transmission electron microscopy, scanning electron microscopy, and powder X-ray diffraction pattern. A series of experimental results indicated that several experimental factors, such as AOT concentration, ratio of [water]/[surfactant], reaction time, and ratio of the reagents, play key roles in the final morphologies of PbS. Possible formation mechanisms of PbS nanorods and nanotubes were proposed.

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