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Title: Shape-controlled narrow-gap SnTe nanostructures: From nanocubes to nanorods and nanowires

Abstract

In this study, the rational design and synthesis of narrow-gap colloidal semiconductor nanocrystals (NCs) is an important step toward the next generation of solution-processable photovoltaics, photodetectors, and thermoelectric devices. SnTe NCs are particularly attractive as a Pb-free alternative to NCs of narrow-gap lead chalcogenides. Previous synthetic efforts on SnTe NCs have focused on spherical nanoparticles. Here we report new strategies for synthesis of SnTe NCs with shapes tunable from highly monodisperse nanocubes, to nanorods (NRs) with variable aspect ratios, and finally to long, straight nanowires (NWs). Reaction at high temperature quickly forms thermodynamically favored nanocubes, but low temperatures lead to elongated particles. Transmission electron microscopy studies of reaction products at various stages of the synthesis reveal that the growth and shape-focusing of monodisperse SnTe nanocubes likely involves interparticle ripening, while directional growth of NRs and NWs may be initiated by particle dimerization via oriented attachment.

Authors:
 [1]; ;  [2];  [2];  [3];  [1];  [1];  [1]
  1. Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
  2. Brookhaven National Lab. (BNL), Upton, NY (United States)
  3. New Mexico State Univ., Las Cruces, NM (United States)
Publication Date:
Research Org.:
Brookhaven National Laboratory (BNL), Upton, NY (United States); Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22)
OSTI Identifier:
1235859
Alternate Identifier(s):
OSTI ID: 1409770
Report Number(s):
BNL-111619-2015-JA; LA-UR-17-22648
Journal ID: ISSN 0002-7863; KC0403020
Grant/Contract Number:  
SC0012704; AC52-06NA25396
Resource Type:
Accepted Manuscript
Journal Name:
Journal of the American Chemical Society
Additional Journal Information:
Journal Volume: 137; Journal Issue: 48; Journal ID: ISSN 0002-7863
Publisher:
American Chemical Society (ACS)
Country of Publication:
United States
Language:
English
Subject:
77 NANOSCIENCE AND NANOTECHNOLOGY; shape-controlled; SnTe; nanostructures; Center for Functional Nanomaterials

Citation Formats

Guo, Shaojun, Andrew F. Fidler, He, Kai, Su, Dong, Chen, Gen, Lin, Qianglu, Pietryga, Jeffrey M., and Klimov, Victor I. Shape-controlled narrow-gap SnTe nanostructures: From nanocubes to nanorods and nanowires. United States: N. p., 2015. Web. doi:10.1021/jacs.5b09490.
Guo, Shaojun, Andrew F. Fidler, He, Kai, Su, Dong, Chen, Gen, Lin, Qianglu, Pietryga, Jeffrey M., & Klimov, Victor I. Shape-controlled narrow-gap SnTe nanostructures: From nanocubes to nanorods and nanowires. United States. doi:10.1021/jacs.5b09490.
Guo, Shaojun, Andrew F. Fidler, He, Kai, Su, Dong, Chen, Gen, Lin, Qianglu, Pietryga, Jeffrey M., and Klimov, Victor I. Fri . "Shape-controlled narrow-gap SnTe nanostructures: From nanocubes to nanorods and nanowires". United States. doi:10.1021/jacs.5b09490. https://www.osti.gov/servlets/purl/1235859.
@article{osti_1235859,
title = {Shape-controlled narrow-gap SnTe nanostructures: From nanocubes to nanorods and nanowires},
author = {Guo, Shaojun and Andrew F. Fidler and He, Kai and Su, Dong and Chen, Gen and Lin, Qianglu and Pietryga, Jeffrey M. and Klimov, Victor I.},
abstractNote = {In this study, the rational design and synthesis of narrow-gap colloidal semiconductor nanocrystals (NCs) is an important step toward the next generation of solution-processable photovoltaics, photodetectors, and thermoelectric devices. SnTe NCs are particularly attractive as a Pb-free alternative to NCs of narrow-gap lead chalcogenides. Previous synthetic efforts on SnTe NCs have focused on spherical nanoparticles. Here we report new strategies for synthesis of SnTe NCs with shapes tunable from highly monodisperse nanocubes, to nanorods (NRs) with variable aspect ratios, and finally to long, straight nanowires (NWs). Reaction at high temperature quickly forms thermodynamically favored nanocubes, but low temperatures lead to elongated particles. Transmission electron microscopy studies of reaction products at various stages of the synthesis reveal that the growth and shape-focusing of monodisperse SnTe nanocubes likely involves interparticle ripening, while directional growth of NRs and NWs may be initiated by particle dimerization via oriented attachment.},
doi = {10.1021/jacs.5b09490},
journal = {Journal of the American Chemical Society},
number = 48,
volume = 137,
place = {United States},
year = {2015},
month = {11}
}

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