Abstract
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.
| Original language | English |
|---|---|
| Pages (from-to) | 15074-15077 |
| Number of pages | 4 |
| Journal | Journal of the American Chemical Society |
| Volume | 137 |
| Issue number | 48 |
| DOIs | |
| Publication status | Published - Dec 9 2015 |
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ASJC Scopus subject areas
- Chemistry(all)
- Catalysis
- Biochemistry
- Colloid and Surface Chemistry
Cite this
Shape-Controlled Narrow-Gap SnTe Nanostructures : From Nanocubes to Nanorods and Nanowires. / Guo, Shaojun; Fidler, Andrew F.; He, Kai; Su, Dong; Chen, Gen; Lin, Qianglu; Pietryga, Jeffrey M.; Klimov, Victor I.
In: Journal of the American Chemical Society, Vol. 137, No. 48, 09.12.2015, p. 15074-15077.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Shape-Controlled Narrow-Gap SnTe Nanostructures
T2 - From Nanocubes to Nanorods and Nanowires
AU - Guo, Shaojun
AU - Fidler, Andrew F.
AU - He, Kai
AU - Su, Dong
AU - Chen, Gen
AU - Lin, Qianglu
AU - Pietryga, Jeffrey M.
AU - Klimov, Victor I
PY - 2015/12/9
Y1 - 2015/12/9
N2 - 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.
AB - 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.
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UR - http://www.scopus.com/inward/citedby.url?scp=84949599621&partnerID=8YFLogxK
U2 - 10.1021/jacs.5b09490
DO - 10.1021/jacs.5b09490
M3 - Article
AN - SCOPUS:84949599621
VL - 137
SP - 15074
EP - 15077
JO - Journal of the American Chemical Society
JF - Journal of the American Chemical Society
SN - 0002-7863
IS - 48
ER -