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학술지 Hierarchical Materials Design by Pattern Transfer Printing of SelfAssembled Binary Nanocrystal Superlattices
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백태종, Hongseok Yun, Blaise Fleury, 홍성훈, Pil Sung Jo, Yaoting Wu, 오승주, Matteo Cargnello, Haoran Yang, Christopher B. Murray, Cherie R. Kagan
Nano Letters, v.17 no.3, pp.1387-1394
American Chemical Society(ACS)
17JB1300, 파동에너지 제어 ICT 극한물성시스템 융합기술, 홍성훈
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 nanocrystal (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.
KSP 제안 키워드
Assembly technique, Binary nanocrystal superlattices, Building block, Colloidal nanocrystal, Different compositions, Electron Microscopy, Free-standing, Interfacial assembly, Langmuir-Schaefer(LS), Multiple length scales, Pattern transfer