Structural diversity in binary superlattices self-assembled from polymer-grafted nanocrystals

Ye, Xingchen; Zhu, Chenhui; Ercius, Peter; Raja, Shilpa N.; He, Bo; Jones, Matthew R.; Hauwiller, Matthew R.; Liu, Yi; Xu, Ting; Alivisatos, A. Paul

doi:10.1038/ncomms10052

Title: Structural diversity in binary superlattices self-assembled from polymer-grafted nanocrystals

Journal Article · Wed Dec 02 00:00:00 EST 2015 · Nature Communications

DOI:https://doi.org/10.1038/ncomms10052· OSTI ID:1255541

Ye, Xingchen ^[1]; Zhu, Chenhui ^[2];

^[3]; Raja, Shilpa N. ^[4]; He, Bo ^[3]; Jones, Matthew R. ^[1]; Hauwiller, Matthew R. ^[1]; Liu, Yi ^[3]; Xu, Ting ^[4]; Alivisatos, A. Paul ^[5]

Univ. of California, Berkeley, CA (United States)
Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States). Advanced Light Source (ALS)
Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
Univ. of California, Berkeley, CA (United States); Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
Univ. of California, Berkeley, CA (United States); Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States); Kavli Energy NanoScience Institute, Berkeley, CA (United States)

Multicomponent nanocrystal superlattices represent an interesting class of material that derives emergent properties from mesoscale structure, yet their programmability can be limited by the alkyl-chain-based ligands decorating the surfaces of the constituent nanocrystals. Polymeric ligands offer distinct advantages, as they allow for more precise tuning of the effective size and 'interaction softness' through changes to the polymer' s molecular weight, chemical nature, architecture, persistence length and surrounding solvent. Here we show the formation of 10 different binary nanocrystal superlattices (BNSLs) with both two- and three-dimensional order through independent adjustment of the core size of spherical nanocrystals and the molecular weight of densely grafted polystyrene ligands. These polymer-brush-based ligands introduce new energetic contributions to the interparticle potential that stabilizes various BNSL phases across a range of length scales and interparticle spacings. Our study opens the door for nanocrystals to become modular elements in the design of functional particle brush solids with controlled nanoscale interfaces and mesostructures.

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Research Organization:: Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States)

Sponsoring Organization:: USDOE Office of Science (SC), Basic Energy Sciences (BES)

Grant/Contract Number:: AC02-05CH11231

OSTI ID:: 1255541

Alternate ID(s):: OSTI ID: 1378674

Journal Information:: Nature Communications, Vol. 6; ISSN 2041-1723

Publisher:: Nature Publishing GroupCopyright Statement

Country of Publication:: United States

Language:: English

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Cited by: 185 works

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