A Concise Route to Fabricate TiO2 Nanoporous and Nanopillar Films Based on Block Copolymer Self-Assembly

Yu Mei Gong; Ying Xin He; Jing Guo; Hong Zhang

doi:10.4028/www.scientific.net/AMR.774-776.931

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Optimization of Microwave-Assisted Extraction of Polysaccharides from Panax japlcus Var
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The Cascaded Effects in the Frequency Selective Surfaces Sculpted from Carbon Fabric Reinforced Epoxy Composite Panels Coated with Conductive Silver Paste
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Preparation and Properties of poly (n-butyl acrylate)/ poly (methyl methacrylate-co-styrene) Emulsion Polymer with Pentaerythritol Triacrylate as a Cross-Linking Agent
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A Concise Route to Fabricate TiO₂ Nanoporous and Nanopillar Films Based on Block Copolymer Self-Assembly
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Properties of Ba-Hexaferrite Thin Films with Different Layer Structures
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Study on Properties of Lightweight Aggregate Concrete Characterized by Environment Protection
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Numerical Investigation of Transverse Tensile Behaviors of Marine Composites under Different Strain Rates
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Preparation and Research of Porous KGM/ Collagen II Composite Cartilage Scaffolds
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HomeAdvanced Materials ResearchAdvanced Materials Research Vols. 774-776A Concise Route to Fabricate TiO2 Nanoporous and...

A Concise Route to Fabricate TiO₂ Nanoporous and Nanopillar Films Based on Block Copolymer Self-Assembly

Abstract:

This study developed a concise route to fabricate TiO₂ nanoporous and nanopillar films based on the self-assembly of block-copolymer thin films in periodic nanostructures. We obtained the perpendicularly oriented cylindrical domains in polystyrene-b-poly (methyl methacrylate) (PS-b-PMMA) diblock copolymer (BCP) films by thermal annealing on ITO substrate modified by a cross-linkable random copolymer, and then these films were immersed into the titanium oxide sol in acetic acid for a few hours. The acetic acid in the sol can selectively swell the PMMA component, which results in titanium oxide sol being loaded to the PMMA component selectively. Then the films were calcined at high temperature to remove the PS-b-PMMA block copolymer, and simultaneously the titanium oxide was transferred in situ to the substrate. As a result, a highly ordered array of nanoporous and nanopillar TiO₂ thin film is observed on the ITO substrates depending upon the block copolymer used with PS and PMMA cylinder-forming components. In principle, it can be a general and versatile approach for fabricating functional nanoparticle arrays.