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Title: Reversible, Tunable, Electric-Field Driven Assembly of Silver Nanocrystal Superlattices

Nanocrystal superlattices are typically fabricated by either solvent evaporation or destabilization methods that require long time periods to generate highly ordered structures. In this paper, we report for the first time the use of electric fields to reversibly drive nanocrystal assembly into superlattices without changing solvent volume or composition, and show that this method only takes 20 min to produce polyhedral colloidal crystals, which would otherwise need days or weeks. This method offers a way to control the lattice constants and degree of preferential orientation for superlattices and can suppress the uniaxial superlattice contraction associated with solvent evaporation. As a result, in situ small-angle X-ray scattering experiments indicated that nanocrystal superlattices were formed while solvated, not during drying.
Authors:
ORCiD logo [1] ;  [2] ;  [1]
  1. Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
  2. Univ. of California, Los Angeles, CA (United States)
Publication Date:
Report Number(s):
LLNL-JRNL-710158
Journal ID: ISSN 1530-6984; 846207
Grant/Contract Number:
AC52-07NA27344
Type:
Accepted Manuscript
Journal Name:
Nano Letters
Additional Journal Information:
Journal Volume: 17; Journal Issue: 6; Journal ID: ISSN 1530-6984
Publisher:
American Chemical Society
Research Org:
Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
Sponsoring Org:
USDOE National Nuclear Security Administration (NNSA)
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; Ag nanocrystals; colloidal crystals; field-driven assembly; grazing incidence small-angle X-ray scattering; Superlattice
OSTI Identifier:
1470709

Yu, Yixuan, Yu, Dian, and Orme, Christine A. Reversible, Tunable, Electric-Field Driven Assembly of Silver Nanocrystal Superlattices. United States: N. p., Web. doi:10.1021/acs.nanolett.7b01323.
Yu, Yixuan, Yu, Dian, & Orme, Christine A. Reversible, Tunable, Electric-Field Driven Assembly of Silver Nanocrystal Superlattices. United States. doi:10.1021/acs.nanolett.7b01323.
Yu, Yixuan, Yu, Dian, and Orme, Christine A. 2017. "Reversible, Tunable, Electric-Field Driven Assembly of Silver Nanocrystal Superlattices". United States. doi:10.1021/acs.nanolett.7b01323. https://www.osti.gov/servlets/purl/1470709.
@article{osti_1470709,
title = {Reversible, Tunable, Electric-Field Driven Assembly of Silver Nanocrystal Superlattices},
author = {Yu, Yixuan and Yu, Dian and Orme, Christine A.},
abstractNote = {Nanocrystal superlattices are typically fabricated by either solvent evaporation or destabilization methods that require long time periods to generate highly ordered structures. In this paper, we report for the first time the use of electric fields to reversibly drive nanocrystal assembly into superlattices without changing solvent volume or composition, and show that this method only takes 20 min to produce polyhedral colloidal crystals, which would otherwise need days or weeks. This method offers a way to control the lattice constants and degree of preferential orientation for superlattices and can suppress the uniaxial superlattice contraction associated with solvent evaporation. As a result, in situ small-angle X-ray scattering experiments indicated that nanocrystal superlattices were formed while solvated, not during drying.},
doi = {10.1021/acs.nanolett.7b01323},
journal = {Nano Letters},
number = 6,
volume = 17,
place = {United States},
year = {2017},
month = {5}
}