View in EDS

Hierarchical, Ultrathin Single-Crystal Nanowires ofCdS Conveniently Produced in Laser-Induced Thermal Field.

Saved in:
Bibliographic Details
Title: Hierarchical, Ultrathin Single-Crystal Nanowires ofCdS Conveniently Produced in Laser-Induced Thermal Field.
Authors: Li-Li Han1, Huolin L. Xin1, Sergei A. Kulinich1, Li-Jun Yang1, Xi-Wen Du1
Source: Langmuir. Jul2015, Vol. 31 Issue 29, p8162-8167. 6p.
Subjects: Single crystals, Nanowires, Cadmium sulfide, Laser beams, Thermal analysis, Sphalerite
Abstract: Hierarchical nanowires (HNWs) exhibitunique properties and havewide applications, while often suffering from imperfect structure.Herein, we report a facile strategy toward ultrathin CdS HNWs withmonocrystal structure, where a continuous-wave (CW) Nd:YAG laser isemployed to irradiate an oleic acid (OA) solution containing precursorsand a light absorber. The high heating rate and large temperaturegradient generated by the CW laser lead to the rapid formation oftiny zinc-blende CdS nanocrystals which then line up into nanowireswith the help of OA molecules. Next, the nanowires experience a phasetransformation from zinc-blende to wurtzite structure, and the transformation-inducedstress creates terraces on their surface, which promotes the growthof side branches and eventually results in monocrystal HNWs with anultrathin diameter of 24 nm. The one-step synthesis of HNWs is conductedin air and completes in just 40 s, thus being very simple and rapid.The prepared CdS HNWs display photocatalytic performance superiorto their nanoparticle counterparts, thus showing promise for catalyticapplications in the future. [ABSTRACT FROM AUTHOR]
Copyright of Langmuir is the property of American Chemical Society and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
Database: Engineering Source
Description
Abstract:Hierarchical nanowires (HNWs) exhibitunique properties and havewide applications, while often suffering from imperfect structure.Herein, we report a facile strategy toward ultrathin CdS HNWs withmonocrystal structure, where a continuous-wave (CW) Nd:YAG laser isemployed to irradiate an oleic acid (OA) solution containing precursorsand a light absorber. The high heating rate and large temperaturegradient generated by the CW laser lead to the rapid formation oftiny zinc-blende CdS nanocrystals which then line up into nanowireswith the help of OA molecules. Next, the nanowires experience a phasetransformation from zinc-blende to wurtzite structure, and the transformation-inducedstress creates terraces on their surface, which promotes the growthof side branches and eventually results in monocrystal HNWs with anultrathin diameter of 24 nm. The one-step synthesis of HNWs is conductedin air and completes in just 40 s, thus being very simple and rapid.The prepared CdS HNWs display photocatalytic performance superiorto their nanoparticle counterparts, thus showing promise for catalyticapplications in the future. [ABSTRACT FROM AUTHOR]
ISSN:07437463
DOI:10.1021/acs.langmuir.5b01923