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

Journal Article · · Nano Letters
ORCiD logo [1];  [2];  [1]
  1. Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
  2. Univ. of California, Los Angeles, CA (United States)

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.

Research Organization:
Lawrence Livermore National Laboratory (LLNL), Livermore, CA (United States)
Sponsoring Organization:
USDOE National Nuclear Security Administration (NNSA)
Grant/Contract Number:
AC52-07NA27344
OSTI ID:
1470709
Report Number(s):
LLNL-JRNL-710158; 846207
Journal Information:
Nano Letters, Vol. 17, Issue 6; ISSN 1530-6984
Publisher:
American Chemical SocietyCopyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 28 works
Citation information provided by
Web of Science

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Cited By (3)

Reversible self-assembly of gold nanorods mediated by photoswitchable molecular adsorption journal April 2019
Space- and time-resolved small angle X-ray scattering to probe assembly of silver nanocrystal superlattices journal October 2018
Stimuli-responsive self-assembly of nanoparticles journal January 2019