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Title: Triclinic nematic colloidal crystals from competing elastic and electrostatic interactions

Abstract

The self-assembly of nanoparticles can enable the generation of composites with predesigned properties, but reproducing the structural diversity of atomic and molecular crystals remains a challenge. We combined anisotropic elastic and weakly screened electrostatic interactions to guide both orientational and triclinic positional self-ordering of inorganic nanocrystals in a nematic fluid host. The lattice periodicity of these low-symmetry colloidal crystals is more than an order of magnitude larger than the nanoparticle size. The orientations of the nanocrystals, as well as the crystallographic axes of the ensuing triclinic colloidal crystals, are coupled to the uniform alignment direction of the nematic host, which can be readily controlled on large scales. We examine colloidal pair and many-body interactions and show how triclinic crystals with orientational ordering of the semiconductor nanorods emerge from competing long-range elastic and electrostatic forces.

Authors:
 [1];  [1];  [2]
  1. Univ. of Colorado, Boulder, CO (United States)
  2. Univ. of Colorado, Boulder, CO (United States); National Renewable Energy Lab. (NREL), Golden, CO (United States)
Publication Date:
Research Org.:
Univ. of Colorado, Boulder, CO (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22). Materials Sciences & Engineering Division
OSTI Identifier:
1595171
Grant/Contract Number:  
SC0010305
Resource Type:
Accepted Manuscript
Journal Name:
Science
Additional Journal Information:
Journal Volume: 352; Journal Issue: 6281; Journal ID: ISSN 0036-8075
Publisher:
AAAS
Country of Publication:
United States
Language:
English
Subject:
42 ENGINEERING

Citation Formats

Mundoor, Haridas, Senyuk, Bohdan, and Smalyukh, Ivan I. Triclinic nematic colloidal crystals from competing elastic and electrostatic interactions. United States: N. p., 2016. Web. doi:10.1126/science.aaf0801.
Mundoor, Haridas, Senyuk, Bohdan, & Smalyukh, Ivan I. Triclinic nematic colloidal crystals from competing elastic and electrostatic interactions. United States. https://doi.org/10.1126/science.aaf0801
Mundoor, Haridas, Senyuk, Bohdan, and Smalyukh, Ivan I. Fri . "Triclinic nematic colloidal crystals from competing elastic and electrostatic interactions". United States. https://doi.org/10.1126/science.aaf0801. https://www.osti.gov/servlets/purl/1595171.
@article{osti_1595171,
title = {Triclinic nematic colloidal crystals from competing elastic and electrostatic interactions},
author = {Mundoor, Haridas and Senyuk, Bohdan and Smalyukh, Ivan I.},
abstractNote = {The self-assembly of nanoparticles can enable the generation of composites with predesigned properties, but reproducing the structural diversity of atomic and molecular crystals remains a challenge. We combined anisotropic elastic and weakly screened electrostatic interactions to guide both orientational and triclinic positional self-ordering of inorganic nanocrystals in a nematic fluid host. The lattice periodicity of these low-symmetry colloidal crystals is more than an order of magnitude larger than the nanoparticle size. The orientations of the nanocrystals, as well as the crystallographic axes of the ensuing triclinic colloidal crystals, are coupled to the uniform alignment direction of the nematic host, which can be readily controlled on large scales. We examine colloidal pair and many-body interactions and show how triclinic crystals with orientational ordering of the semiconductor nanorods emerge from competing long-range elastic and electrostatic forces.},
doi = {10.1126/science.aaf0801},
journal = {Science},
number = 6281,
volume = 352,
place = {United States},
year = {Fri Apr 01 00:00:00 EDT 2016},
month = {Fri Apr 01 00:00:00 EDT 2016}
}

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