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Dual Atomic Coherence in the Self-Assembly of Patchy Heterostructural Nanocrystals

Journal Article · · ACS Nano
 [1];  [2];  [1];  [3];  [4];  [1];  [1];  [1];  [5];  [1]
  1. Brown University, Providence, RI (United States)
  2. Department of Chemistry, University of Utah, Salt Lake City, Utah 84112, United States
  3. University Medical Center Hamburg-Eppendorf, Hamburg ((Germany); Heinrich Pette Institute-Leibniz Institute for Experimental Virology, Hamburg (Germany)
  4. Argonne National Laboratory (ANL), Argonne, IL (United States). Center for Nanoscale Materials
  5. University of Utah, Salt Lake City, UT (United States)

Advances in the synthesis and self-assembly of nanocrystals have enabled researchers to create a plethora of different nanoparticle superlattices. But while many super lattices with complex types of translational order have been realized, rotational order of nanoparticle building blocks within the lattice is more difficult to achieve. Self-assembled superstructures with atomically coherent nanocrystal lattices, which are desirable due to their exceptional electronic and optical properties, have been fabricated only for a few selected systems. Here, we combine experiments with molecular dynamics (MD) simulations to study the self-assembly of heterostructural nanocrystals (HNCs), consisting of a near-spherical quantum dot (QD) host decorated with a small number of epitaxially grown gold nanocrystal (Au NC) "patches ". Self-assembly of these HNCs results in face-centered-cubic (fcc) superlattices with well-defined orientational relationships between the atomic lattices of both QD hosts and Au patches. MD simulations indicate that the observed dual atomic coherence is linked to the number, size, and relative positions of gold patches. Here this study provides a strategy for the design and fabrication of NC superlattices with large structural complexity and delicate orientational order.

Research Organization:
Argonne National Laboratory (ANL), Argonne, IL (United States)
Sponsoring Organization:
USDOE Office of Science (SC), Basic Energy Sciences (BES); National Science Foundation (NSF); Camille & Henry Dreyfus Foundation; Alfred P. Sloan Foundation
Grant/Contract Number:
AC02-06CH11357
OSTI ID:
1969697
Journal Information:
ACS Nano, Journal Name: ACS Nano Journal Issue: 9 Vol. 16; ISSN 1936-0851
Publisher:
American Chemical Society (ACS)Copyright Statement
Country of Publication:
United States
Language:
English

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