Live Templates of a Supramolecular Block Copolymer for the Synthesis of Ordered Nanostructured TiO2 Films via Guest Exchange

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Title:	Live Templates of a Supramolecular Block Copolymer for the Synthesis of Ordered Nanostructured TiO2 Films via Guest Exchange
Authors:	孫亞賢;Chuang, Wei-Tsung;Hsu, Yan-Ming;Lin, En-Li;Lin, I-Ming;Sun, Ya-Sen;Chiang, Yeo-Wan;Su, Chun-Jen;Lee, Yao-Chang;Jeng, U-Ser
Contributors:	工學院化學工程與材料工程學系
Date:	2016-12-07
Issue Date:	2026-04-21 14:57:34 (UTC+8)
Publisher:	American Chemical Society;United States
Abstract:	摘要： In this work, we introduce a facile method based on host-guest chemistry to synthesize a range of nanostructured TiO materials using supramolecular templates of a dendron-jacketed block copolymer (DJBCP). The DJBCP is composed of amphiphilic dendrons (4'-(3,4,5-tridodecyloxybenzoyloxy)benzoic acid, TDB) selectively incorporated into a P4VP block of polystyrene-block-poly(4-vinylpyridine) (PS-b-P4VP) via hydrogen bonding. The PS-b-P4VP host acts as a structure-directing template, while the guest molecules (TDB) assist the self-assembly nanostructures and zone-axis alignment, resulting in the nanostructured template of vertically oriented cylinders formed via successive phase transformations from Im3̅m to R3̅m to P6mm upon thermal annealing in the doctor-blade-cast film. The guest molecules subsequently direct the titania precursors into the P4VP domains of the templates via supramolecular guest exchange during immersion of the film in a designated precursor solution containing a P4VP-selective solvent. The subsequent UV irradiation step leads to the formation of PS-b-P4VP/TiO hybrids. Finally, removal of the host template by calcination leaves behind mesoporous channels and makes sacrifices to be a carbon source for carbon-doping TiO materials. Various TiO nanoarchitectures, namely, vertical and wiggly micrometer-length channels, inverse opals, fingerprint-like channels, heterogeneous multilayers, and nanotubes, have been fabricated by highly tunable DJBCP nanostructures. 其他題名： ACS Appl Mater Interfaces 出版者： United States 出版日期： 2016-12-07 出處： ACS applied materials & interfaces, 2016-12, Vol.8 (48), p.33221-33229 資源來源： American Chemical Society Journals 識別號： ISSN: 1944-8244 識別號： EISSN: 1944-8252 識別號： DOI: 10.1021/acsami.6b12216 識別號： PMID: 27934174
Appears in Collections:	[Department of Chemical and Materials Engineering] journal & Dissertation

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