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Controlling Anisotropic Growth of Colloidal ZnSe Nanostructures

Journal Article · · Journal of the American Chemical Society
DOI:https://doi.org/10.1021/jacs.8b05941· OSTI ID:1485251
 [1];  [2];  [3];  [4];  [1]
  1. Hebrew Univ. of Jerusalem (Israel). Inst. of Chemistry. The Center for Nanoscience and Nanotechnology
  2. Stony Brook Univ., NY (United States). Dept. of Materials Science and Chemical Engineering; Manhattan College, Riverdale, NY (United States). Dept. of Physics
  3. Hebrew Univ. of Jerusalem (Israel). The Center for Nanoscience and Nanotechnology. Inst. of Life Sciences
  4. Stony Brook Univ., NY (United States). Dept. of Materials Science and Chemical Engineering; Brookhaven National Lab. (BNL), Upton, NY (United States). Dept. of Chemistry
Semiconductor nanocrystals serve as outstanding model systems for studying quantum confined size and shape effects. Shape control is an important knob for controlling their properties but so far it has been well developed mainly for heavy-metal containing semiconductor nanocrystals, limiting their further widespread utilization. We report a synthesis of heavy-metal free ZnSe nanocrystals with shape and size control through utilization of well-defined molecular clusters. In this approach, ZnSe nanowires are synthesized and their length and shape control is achieved by introduction of controlled amounts of molecular clusters. As a result of [Zn4(SPh)10](Me4N)2 clusters (Zn4 clusters) addition, short ZnSe nanorods or ZnSe nanodots can be obtained through tuning the ratio of Zn4 clusters to ZnSe. A study using transmission electron microscopy revealed the formation of a hybrid inorganic–organic nanowire, whereby the ligands form a template for self-assembly of ZnSe magic size clusters. The hybrid nanowire template becomes shorter and eventually disappears upon increasing amount of Zn4 clusters in the reaction. The generality of the method is demonstrated by using isostructural [Cu4(SPh)6](Me4N)2 clusters, which presented a new approach to Cu doped ZnSe nanocrystals and provided also a unique opportunity to employ X-ray absorption fine structure spectroscopy for deciphering the changes in the local atomic-scale environment of the clusters and explaining their role in the process of the nanorods formation. The introduction of molecular clusters presented here opens a path for growth of colloidal semiconductor nanorods, expanding the palette of materials selection with obvious implications for optoelectronic and biomedical applications.
Research Organization:
Brookhaven National Lab. (BNL), Upton, NY (United States); Hebrew Univ. of Jerusalem (Israel); Stony Brook Univ., NY (United States)
Sponsoring Organization:
National Science Foundation (NSF) (United States); USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22); United States-Israel Binational Science Foundation (BSF)
Grant/Contract Number:
AC02-06CH11357; AC02-76SF00515; SC0012704
OSTI ID:
1485251
Alternate ID(s):
OSTI ID: 1491879
Report Number(s):
BNL--209665-2018-JAAM
Journal Information:
Journal of the American Chemical Society, Journal Name: Journal of the American Chemical Society Journal Issue: 44 Vol. 140; ISSN 0002-7863
Publisher:
American Chemical Society (ACS)Copyright Statement
Country of Publication:
United States
Language:
English

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Cited By (8)

Multi-Element Topochemical-Molten Salt Synthesis of One-Dimensional Piezoelectric Perovskite journal July 2019
Strain-controlled shell morphology on quantum rods journal January 2019
Heavy‐Metal‐Free Colloidal Semiconductor Nanorods: Recent Advances and Future Perspectives journal April 2019
Shell Stabilization of Photocatalytic ZnSe Nanorods journal October 2019
Recent Advances in Zinc‐Containing Colloidal Semiconductor Nanocrystals for Optoelectronic and Energy Conversion Applications journal July 2019
Spontaneous shape and phase control of colloidal ZnSe nanocrystals by tailoring Se precursor reactivity journal January 2019
Synthesis of InP branched nanostructures by controlling the intermediate nanoclusters journal January 2020
Chemically reversible isomerization of inorganic clusters journal February 2019

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