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Multilayer Diffraction Reveals That Colloidal Superlattices Approach the Structural Perfection of Single Crystals

Toso, Stefano ; Baranov, Dmitry LU orcid ; Altamura, Davide ; Scattarella, Francesco ; Dahl, Jakob ; Wang, Xingzhi ; Marras, Sergio ; Alivisatos, A. Paul ; Singer, Andrej and Giannini, Cinzia , et al. (2021) In ACS Nano 15(4). p.6243-6256
Abstract
Colloidal superlattices are fascinating materials made of ordered
nanocrystals, yet they are rarely called “atomically precise”. That is
unsurprising, given how challenging it is to quantify the degree of
structural order in these materials. However, once that order crosses a
certain threshold, the constructive interference of X-rays diffracted by
the nanocrystals dominates the diffraction pattern, offering a wealth
of structural information. By treating nanocrystals as scattering
sources forming a self-probing interferometer, we developed a multilayer
diffraction method that enabled the accurate determination of the
nanocrystal size, interparticle spacing, and their fluctuations for
... (More)
Colloidal superlattices are fascinating materials made of ordered
nanocrystals, yet they are rarely called “atomically precise”. That is
unsurprising, given how challenging it is to quantify the degree of
structural order in these materials. However, once that order crosses a
certain threshold, the constructive interference of X-rays diffracted by
the nanocrystals dominates the diffraction pattern, offering a wealth
of structural information. By treating nanocrystals as scattering
sources forming a self-probing interferometer, we developed a multilayer
diffraction method that enabled the accurate determination of the
nanocrystal size, interparticle spacing, and their fluctuations for
samples of self-assembled CsPbBr3 and PbS nanomaterials. The
multilayer diffraction method requires only a laboratory-grade
diffractometer and an open-source fitting algorithm for data analysis.
The average nanocrystal displacement of 0.33 to 1.43 Å in the studied
superlattices provides a figure of merit for their structural perfection
and approaches the atomic displacement parameters found in traditional
crystals. (Less)
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; ; ; ; ; ; ; ; and , et al. (More)
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publishing date
type
Contribution to journal
publication status
published
keywords
disorder, grazing-incidence, multilayer diffraction, nanocrystal, superlattice, thermal annealing
in
ACS Nano
volume
15
issue
4
pages
14 pages
publisher
The American Chemical Society (ACS)
external identifiers
  • pmid:33481560
  • scopus:85100238938
ISSN
1936-0851
DOI
10.1021/acsnano.0c08929
language
English
LU publication?
no
additional info
Publisher Copyright: © 2021 American Chemical Society.
id
a3d87d57-a053-4858-9457-e3f82ae8ea68
date added to LUP
2023-01-17 11:55:03
date last changed
2024-04-18 08:24:30
@article{a3d87d57-a053-4858-9457-e3f82ae8ea68,
  abstract     = {{Colloidal superlattices are fascinating materials made of ordered <br>
nanocrystals, yet they are rarely called “atomically precise”. That is <br>
unsurprising, given how challenging it is to quantify the degree of <br>
structural order in these materials. However, once that order crosses a <br>
certain threshold, the constructive interference of X-rays diffracted by<br>
 the nanocrystals dominates the diffraction pattern, offering a wealth <br>
of structural information. By treating nanocrystals as scattering <br>
sources forming a self-probing interferometer, we developed a multilayer<br>
 diffraction method that enabled the accurate determination of the <br>
nanocrystal size, interparticle spacing, and their fluctuations for <br>
samples of self-assembled CsPbBr<sub>3</sub> and PbS nanomaterials. The <br>
multilayer diffraction method requires only a laboratory-grade <br>
diffractometer and an open-source fitting algorithm for data analysis. <br>
The average nanocrystal displacement of 0.33 to 1.43 Å in the studied <br>
superlattices provides a figure of merit for their structural perfection<br>
 and approaches the atomic displacement parameters found in traditional <br>
crystals.}},
  author       = {{Toso, Stefano and Baranov, Dmitry and Altamura, Davide and Scattarella, Francesco and Dahl, Jakob and Wang, Xingzhi and Marras, Sergio and Alivisatos, A. Paul and Singer, Andrej and Giannini, Cinzia and Manna, Liberato}},
  issn         = {{1936-0851}},
  keywords     = {{disorder; grazing-incidence; multilayer diffraction; nanocrystal; superlattice; thermal annealing}},
  language     = {{eng}},
  month        = {{04}},
  number       = {{4}},
  pages        = {{6243--6256}},
  publisher    = {{The American Chemical Society (ACS)}},
  series       = {{ACS Nano}},
  title        = {{Multilayer Diffraction Reveals That Colloidal Superlattices Approach the Structural Perfection of Single Crystals}},
  url          = {{http://dx.doi.org/10.1021/acsnano.0c08929}},
  doi          = {{10.1021/acsnano.0c08929}},
  volume       = {{15}},
  year         = {{2021}},
}