期刊
ACS NANO
卷 5, 期 1, 页码 450-456出版社
AMER CHEMICAL SOC
DOI: 10.1021/nn102207y
关键词
block copolymers; template synthesis; nanostructures; titanium dioxide; self-assembly
类别
资金
- New York State Energy Research Development Authority (NYSERDA)
- U.S. Army Research Office [W911NF-05-1-0339]
- Center for Advanced Materials Processing, CAMP (a New York State Center for Advanced Technology, funded through NYSTAR)
- Department of Chemistry & Biomolecular Science
The deposition of periodic titania nanostructures, templated by a polystyrene-block-poly(4-vinylpyridine)(PS-b-P4VP) block copolymer, is reported. When cast as a thin film (30-50 nm thick), the PS-b-P4VP forms a morphology that consists of P4VP cylinders that are orientated Perpendicular to the Substrate. The P4VP phase was lightly cross-linked by exposing the film to diiodobutane. When the block copolymer film was exposed to the sol-gel titania precursor, titanium(IV) bis(ammonium lactate) dihydroxide (TALH), titania was formed. in the P4VP, phase. The resulting titania structures were identical in size to the P4VP cylinders and only formed (under the deposition conditions used in this study) when the block copolymer film was present on the substrate, thus providing evidence that the block copolymer indeed acts as a template The process works for both silicon and indium tin oxide substrates.
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