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Title: Prediction of binary nanoparticle superlattices from soft potentials

Journal Article · · Journal of Chemical Physics
DOI:https://doi.org/10.1063/1.4939238· OSTI ID:1235588
 [1];  [2]
  1. Iowa State Univ., Ames, IA (United States)
  2. Ames Lab., Ames, IA (United States); Iowa State Univ., Ames, IA (United States)

Driven by the hypothesis that a sufficiently continuous short-ranged potential is able to account for shell flexibility and phonon modes and therefore provides a more realistic description of nanoparticle interactions than a hard sphere model, we compute the solid phase diagram of particles of different radii interacting with an inverse power law potential. From a pool of 24 candidate lattices, the free energy is optimized with respect to additional internal parameters and the p-exponent, determining the short-range properties of the potential, is varied between p = 12 and p = 6. The phase diagrams contain the phases found in ongoing self-assembly experiments, including DNA programmable self-assembly and nanoparticles with capping ligands assembled by evaporation from an organic solvent. Thus, the resulting phase diagrams can be mapped quantitatively to existing experiments as a function of only two parameters: Nanoparticle radius ratio (γ) and softness asymmetry.

Research Organization:
Ames Laboratory (AMES), Ames, IA (United States)
Sponsoring Organization:
USDOE
Grant/Contract Number:
AC02-07CH11358; BES DE-AC02-07CH11358
OSTI ID:
1235588
Alternate ID(s):
OSTI ID: 1234147
Report Number(s):
IS-J-8896; JCPSA6
Journal Information:
Journal of Chemical Physics, Vol. 144, Issue 1; ISSN 0021-9606
Publisher:
American Institute of Physics (AIP)Copyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 34 works
Citation information provided by
Web of Science

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Cited By (5)

Capping Ligand Vortices as “Atomic Orbitals” in Nanocrystal Self-Assembly journal September 2017
Nanoparticle Superlattices as Quasi-Frank-Kasper Phases journal September 2017
Assembly by solvent evaporation: equilibrium structures and relaxation times journal January 2019
Potential of mean force for two nanocrystals: Core geometry and size, hydrocarbon unsaturation, and universality with respect to the force field journal July 2018
Crystal engineering with DNA journal February 2019

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