title: Synthesis of single-crystal PbS nanorods via a simple hydrothermal process using PEO-PPO-PEO triblock copolymer as a structure-directing agent.
abstract: Single-crystal PbS nanorods were successfully synthesized through a simple hydrothermal route using PEO-PPO-PEO triblock copolymer (P123) as a structure-directing agent. The XRD pattern indicates that the crystal structure of the nanorods is face-centre-cubic rocksalt. A SEM image shows that the nanorods have a diameter of 40-70 nm and a length of 200-600 nm, and both tips exhibit taper-like structures. HRTEM and SAED images reveal the single-crystalline nature of the nanorods with the growth along the (111) direction. The experimental results indicated that the P123 concentration and reaction temperature played important roles in controlling the morphology of the PbS nanostructures. The optical property of PbS nanorods was investigated by UV-Vis absorption spectroscopy and the band structure was calculated by the B3LYP hybrid density functional theory.
authors.affiliation: Department of Chemistry, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen, People's Republic of China.
authors.forename: Junfu
authors.initials: J
authors.lastname: Bu
authors.forename: Chageng
authors.initials: C
authors.lastname: Nie
authors.forename: Jinxia
authors.initials: J
authors.lastname: Liang
authors.forename: Lan
authors.initials: L
authors.lastname: Sun
authors.forename: Zhaoxiong
authors.initials: Z
authors.lastname: Xie
authors.forename: Qi
authors.initials: Q
authors.lastname: Wu
authors.forename: Changjian
authors.initials: C
authors.lastname: Lin