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.
Zhang
Chao
C
Institute of Polyoxometalate Chemistry, Department of Chemistry, Northeast Normal University, Changchun 130024, P R China.
Kang
Zhenhui
Z
Shen
Enhong
E
Wang
Enbo
E
Gao
Lei
L
Luo
Fang
F
Tian
Chungui
C
Wang
Chunlei
C
Lan
Yang
Y
Li
Jixue
J
Cao
Xuejing
X
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