High-density arrays of titania nanoparticles using monolayer micellar films of diblock copolymers as templates

Highly dense arrays of titania nanoparticles were fabricated using surface micellar films of poly(styrene-block-2-vinylpyridine) diblock copolymers (PS-b-P2VP) as reaction scaffolds. Titania could be introduced selectively within P2VP nanodomains in PS-b-P2VP films through the binary reaction betwee...

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Veröffentlicht in:Langmuir : the ACS journal of surfaces and colloids. - 1992. - 21(2005), 11 vom: 24. Mai, Seite 5212-7
1. Verfasser: Li, Xue (VerfasserIn)
Weitere Verfasser: Lau, King Hang Aaron, Kim, Dong Ha, Knoll, Wolfgang
Format: Aufsatz
Sprache:English
Veröffentlicht: 2005
Zugriff auf das übergeordnete Werk:Langmuir : the ACS journal of surfaces and colloids
Schlagworte:Journal Article
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245 1 0 |a High-density arrays of titania nanoparticles using monolayer micellar films of diblock copolymers as templates 
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520 |a Highly dense arrays of titania nanoparticles were fabricated using surface micellar films of poly(styrene-block-2-vinylpyridine) diblock copolymers (PS-b-P2VP) as reaction scaffolds. Titania could be introduced selectively within P2VP nanodomains in PS-b-P2VP films through the binary reaction between water molecules trapped in the P2VP domains and the TiCl(4) vapor precursors. Subsequent UV exposure or oxygen plasma treatment removed the organic matrix, leading to titania nanoparticle arrays on the substrate surface. The diameter of the titania domains and the interparticle distance were defined by the lateral scale present in the microphase-separated morphology of the initial PS-b-P2VP films. The typical diameter of titania nanoparticles obtained by oxygen plasma treatment was of the order of approximately 23 nm. Photoluminescence (PL) properties were investigated for films before and after plasma treatment. Both samples showed PL properties with major physical origin due to self-trapped excitons, indicating that the local environment of the titanium atoms is similar 
650 4 |a Journal Article 
700 1 |a Lau, King Hang Aaron  |e verfasserin  |4 aut 
700 1 |a Kim, Dong Ha  |e verfasserin  |4 aut 
700 1 |a Knoll, Wolfgang  |e verfasserin  |4 aut 
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