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Semiconductor Nanoparticles in the Channels of Mesoporous Silica and Titania Thin Films
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SYSNO ASEP 0181633 Document Type C - Proceedings Paper (int. conf.) R&D Document Type Conference Paper Title Semiconductor Nanoparticles in the Channels of Mesoporous Silica and Titania Thin Films Author(s) Wark, M. (DE)
Wellman, H. (DE)
Rathouský, Jiří (UFCH-W) RID, ORCID
Zukal, Arnošt (UFCH-W) RIDSource Title Impact of Zeolites and Other Porous Materials on the New Technologies at the Beginning of the New Millennium / Aiello R. ; Giordano G. ; Testa F.. - Amsterdam : Elsevier, 2002 Pages s. 1457-1464 Number of pages 8 s. Action International of FEZA /2./ Event date 01.09.2002-05.09.2002 VEvent location Taormina Country IT - Italy Event type WRD Language eng - English Country NL - Netherlands Keywords semiconductor nanoparticles ; mesoporous silica ; thin films Subject RIV CF - Physical ; Theoretical Chemistry R&D Projects IAA4040804 GA AV ČR - Academy of Sciences of the Czech Republic (AV ČR) CEZ AV0Z4040901 - UFCH-W Annotation A procedure for the preparation of porous silica thin films was developed, which is based on the use of block copolymers as structure directing agents and the application of the dip-coating technique. The prepared films exhibit an uniform thickness and a large roughness factor indicating the highly developed porosity. The addition of Cd2+ ions to the reaction gel for silica films prior to their formation, followed by the calcination of films at 623 K and treatment with H2S or H2Se is the preferred procedure for the creation of CdS or CdSe nanoparticles. The occurrence of the size-quantization effect confirms that the particles are located within the pores and that their size corresponds to the pore width of the host. The porous structure of titania films prepared using a poly(alkylene) block copolymer in an ethanolic medium depends on their thickness because the completeness of the hydrolysis of the titania precursor is decided by its accessibility for air humidity. Workplace J. Heyrovsky Institute of Physical Chemistry Contact Michaela Knapová, michaela.knapova@jh-inst.cas.cz, Tel.: 266 053 196 Year of Publishing 2004
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