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Hierarchical Materials Design by Pattern Transfer Printing of Self-Assembled Binary Nanocrystal Superlattices

Authors
Paik, TaejongYun, HongseokFleury, BlaiseHong, Sung-HoonJo, Pil SungWu, YaotingOh, Soong-JuCargnello, MatteoYang, HaoranMurray, Christopher B.Kagan, Cherie R.
Issue Date
3월-2017
Publisher
AMER CHEMICAL SOC
Keywords
Transfer patterning; nanocrystals; self-assembly; binary superlattices; liquid interfacial assembly
Citation
NANO LETTERS, v.17, no.3, pp.1387 - 1394
Indexed
SCIE
SCOPUS
Journal Title
NANO LETTERS
Volume
17
Number
3
Start Page
1387
End Page
1394
URI
https://scholar.korea.ac.kr/handle/2021.sw.korea/84381
DOI
10.1021/acs.nanolett.6b04279
ISSN
1530-6984
Abstract
We demonstrate the fabrication of hierarchical materials by controlling the structure of highly ordered binary nanocrystal superlattices (BNSLs) on multiple length scales. Combinations of magnetic, plasmonic, semiconducting, and insulating colloidal nano crystal (NC) building blocks are self-assembled into BNSL membranes via the liquid interfacial assembly technique. Free-standing BNSL membranes are transferred onto topographically structured poly(dimethylsiloxane) molds via the Langmuir-Schaefer technique and then deposited in patterns onto substrates via transfer printing. BNSLs with different structural motifs are successfully patterned into various meso-and microstructures such as lines, circles, and even three-dimensional grids across large-area substrates. A combination of electron microscopy and grazing incidence small-angle X-ray scattering (GISAXS) measurements confirm the ordering of NC building blocks in meso-and micropatterned BNSLs. This technique demonstrates structural diversity in the design of hierarchical materials by assembling BNSLs from NC building blocks of different composition and size by patterning BNSLs into various size and shape superstructures of interest for a broad range of applications.
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공과대학 (신소재공학부)
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