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Nanoporous Bicontinuous Structures via Addition of Thermally-Stable Amphiphilic Nanoparticles within Block Copolymer Templates

Authors
Kim, SeyongYoo, MisangKang, NanaMoon, BongjinKim, Bumjoon J.Choi, Soo-HyungKim, Jaeup U.Bang, Joona
Issue Date
26-6월-2013
Publisher
AMER CHEMICAL SOC
Keywords
Au nanoparticles; thermal stability; block copolymer; bicontinuous structure
Citation
ACS APPLIED MATERIALS & INTERFACES, v.5, no.12, pp.5659 - 5666
Indexed
SCIE
SCOPUS
Journal Title
ACS APPLIED MATERIALS & INTERFACES
Volume
5
Number
12
Start Page
5659
End Page
5666
URI
https://scholar.korea.ac.kr/handle/2021.sw.korea/102938
DOI
10.1021/am400999z
ISSN
1944-8244
Abstract
Herein, we fabricated the bicontinuous structures from nanocomposites of poly(styrene-b-methyl methacrylate) (PS-b-PMMA) block copolymer and the shell-cross-linked, thermally stable gold nanoparticles (Au NPs). The surface property, of Au NPs was controlled with ligands containing various compositions of PS and PMMA so that the resulting Au NPs were selective to PS or PMMA block or nonselective (i.e., neutral) to both blocks. The amphiphilic Au NPs were also prepared by coating the surface of Au NPs with equimolar mixtures of PS and PMMA selective ligands. Consequently, it was found that the morphological behaviors of thermally annealed nanocomposites containing amphiphilic Au NPs and PS-b-PMMA were dramatically different from the case of neutral Au NPs that were coated with nonselective ligands. With increasing the amount of amphiphilic Au NPs, a transition from lamellar to bicontinuous structures was observed, whereas the neutral Au NPs were aggregated within the PS-b-PMMA lamellae. Furthermore, the nanoporous bicontinuous thin films were fabricated on the silicon substrates and the morphological behaviors were quantitatively investigated by grazing incidence small-angle X-ray scattering (GISAXS) analysis.
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