Multilayer Diffraction Reveals That Colloidal Superlattices Approach the Structural Perfection of Single Crystals
(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)
Please use this url to cite or link to this publication:
https://lup.lub.lu.se/record/a3d87d57-a053-4858-9457-e3f82ae8ea68
- author
- publishing date
- 2021-04-27
- 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}}, }