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Title: Superstructures generated from truncated tetrahedral quantum dots

Abstract

The assembly of uniform nanocrystal building blocks into well ordered superstructures is a fundamental strategy for the generation of meso- and macroscale metamaterials with emergent nanoscopic functionalities(1-)(10). The packing of spherical nanocrystals, which frequently adopt dense, face-centred-cubic or hexagonal-close-packed arrangements at thermodynamic equilibrium, has been much more widely studied than that of non-spherical, polyhedral nanocrystals, despite the fact that the latter have intriguing anisotropic properties resulting from the shapes of the building blocks(11-13). Here we report the packing of truncated tetrahedral quantum dot nanocrystals into three distinct superstructures-one-dimensional chiral tetrahelices, two-dimensional quasicrystal-approximant superlattices and three-dimensional cluster-based body-centred-cubic single supercrystals- by controlling the assembly conditions. Using techniques in real and reciprocal spaces, we successfully characterized the superstructures from their nanocrystal translational orderings down to the atomic-orientation alignments of individual quantum dots. Our packing models showed that formation of the nanocrystal superstructures is dominated by the selective facet-to-facet contact induced by the anisotropic patchiness of the tetrahedra. This study provides information about the packing of non-spherical nanocrystals into complex superstructures, and may enhance the potential of self-assembled nanocrystal metamaterials in practical applications.

Authors:
; ; ; ; ; ; ; ;
Publication Date:
Research Org.:
Argonne National Lab. (ANL), Argonne, IL (United States)
Sponsoring Org.:
USDOE Office of Science - Office of Basic Energy Sciences - Scientific User Facilities Division; National Science Foundation (NSF)
OSTI Identifier:
1477503
DOE Contract Number:  
AC02-06CH11357
Resource Type:
Journal Article
Journal Name:
Nature (London)
Additional Journal Information:
Journal Volume: 561; Journal Issue: 7723; Journal ID: ISSN 0028-0836
Publisher:
Nature Publishing Group
Country of Publication:
United States
Language:
English

Citation Formats

Nagaoka, Yasutaka, Tan, Rui, Li, Ruipeng, Zhu, Hua, Eggert, Dennis, Wu, Yimin A., Liu, Yuzi, Wang, Zhongwu, and Chen, Ou. Superstructures generated from truncated tetrahedral quantum dots. United States: N. p., 2018. Web. doi:10.1038/s41586-018-0512-5.
Nagaoka, Yasutaka, Tan, Rui, Li, Ruipeng, Zhu, Hua, Eggert, Dennis, Wu, Yimin A., Liu, Yuzi, Wang, Zhongwu, & Chen, Ou. Superstructures generated from truncated tetrahedral quantum dots. United States. https://doi.org/10.1038/s41586-018-0512-5
Nagaoka, Yasutaka, Tan, Rui, Li, Ruipeng, Zhu, Hua, Eggert, Dennis, Wu, Yimin A., Liu, Yuzi, Wang, Zhongwu, and Chen, Ou. Sat . "Superstructures generated from truncated tetrahedral quantum dots". United States. https://doi.org/10.1038/s41586-018-0512-5.
@article{osti_1477503,
title = {Superstructures generated from truncated tetrahedral quantum dots},
author = {Nagaoka, Yasutaka and Tan, Rui and Li, Ruipeng and Zhu, Hua and Eggert, Dennis and Wu, Yimin A. and Liu, Yuzi and Wang, Zhongwu and Chen, Ou},
abstractNote = {The assembly of uniform nanocrystal building blocks into well ordered superstructures is a fundamental strategy for the generation of meso- and macroscale metamaterials with emergent nanoscopic functionalities(1-)(10). The packing of spherical nanocrystals, which frequently adopt dense, face-centred-cubic or hexagonal-close-packed arrangements at thermodynamic equilibrium, has been much more widely studied than that of non-spherical, polyhedral nanocrystals, despite the fact that the latter have intriguing anisotropic properties resulting from the shapes of the building blocks(11-13). Here we report the packing of truncated tetrahedral quantum dot nanocrystals into three distinct superstructures-one-dimensional chiral tetrahelices, two-dimensional quasicrystal-approximant superlattices and three-dimensional cluster-based body-centred-cubic single supercrystals- by controlling the assembly conditions. Using techniques in real and reciprocal spaces, we successfully characterized the superstructures from their nanocrystal translational orderings down to the atomic-orientation alignments of individual quantum dots. Our packing models showed that formation of the nanocrystal superstructures is dominated by the selective facet-to-facet contact induced by the anisotropic patchiness of the tetrahedra. This study provides information about the packing of non-spherical nanocrystals into complex superstructures, and may enhance the potential of self-assembled nanocrystal metamaterials in practical applications.},
doi = {10.1038/s41586-018-0512-5},
url = {https://www.osti.gov/biblio/1477503}, journal = {Nature (London)},
issn = {0028-0836},
number = 7723,
volume = 561,
place = {United States},
year = {2018},
month = {9}
}

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