Synthesis and Evolution of PbS Nanocrystals through a Surfactant-Assisted Solvothermal Route

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.

Synthesis and Characterization PbS and Bi2S3 Nanostructures via Microwave Approach and Investigation of Their Behaviors in Solar Cell

“…The absorption edge of PbS exhibits a large blue shift [32] when one shrinks the crystallite size to the nanometer size regime. Recently, various methods have been developed to synthesize PbS submicro-/nano-crystals, including solvothermal method [33], chemical vapor deposition (CVD) method [34], ultrasonic method [35], and electrodeposited route [36]. Microwave-assisted synthesis [37] is a very attractive process for producing a variety of materials.…”

Zinc blende versus wurtzite ZnS nanoparticles: control of the phase and optical properties by tetrabutylammonium hydroxide

“…39,[70][71][72][73][74][75][76][77][78] The modifier plays a different role in each type of synthesis, and their effects are not completely understood. The use of a modifier in the chemical synthesis of nanomaterials has been employed to obtain new shapes with different sizes, which promotes the formation of materials with different chemical behaviour.…”

Synthesis and Thermoelectrical Characterization of Lead Chalcogenide Nanowires

“…A variety of methods have been utilized to synthesize PbX (X = S, Se, Te) nanowires, including templating in mesoporous silica channels, [11] oriented attachment of nanoparticles, [12] seeded solution synthesis, [13] colloidal synthesis, [14] and solvothermal, [15] hydrothermal, [16] and soft template routes. [17] A facile chemical vapor transport (CVT) synthesis of thin, highaspect ratio PbS nanowire arrays has also been reported.…”