Synthesis and evolution of PbS nanocrystals through a surfactant-assisted solvothermal route.
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.
Institute of Polyoxometalate Chemistry, Department of Chemistry, Northeast Normal University, Changchun 130024, P R China.
Chao
C
Zhang
Zhenhui
Z
Kang
Enhong
E
Shen
Enbo
E
Wang
Lei
L
Gao
Fang
F
Luo
Chungui
C
Tian
Chunlei
C
Wang
Yang
Y
Lan
Jixue
J
Li
Xuejing
X
Cao
D007854:Lead / Q000737:chemistry*; D049329:Nanostructures / Q000737:chemistry*; D010316:Particle Size; D013440:Sulfides / Q000138:chemical synthesis* / Q000737:chemistry*; D013499:Surface Properties; D013501:Surface-Active Agents / Q000737:chemistry*; D013696:Temperature; D013997:Time Factors; D014867:Water / Q000737:chemistry
D013440:Sulfides; D013501:Surface-Active Agents; D014867:Water; C018391:lead sulfide; D007854:Lead