Morphology and photoluminescence study of titania nanoparticles.

Morphology and photoluminescence study of titania nanoparticles.
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DOI:
10.1007/s00396-011-2421-0
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发表时间:
2011-06
影响因子:
2.4
通讯作者:
Gutmann JS
Gutmann JS
中科院分区:
化学4区
文献类型:
--
作者:
Memesa M;Lenz S;Emmerling SG;Nett S;Perlich J;Müller-Buschbaum P;Gutmann JS

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Titania nanoparticles are prepared by sol–gel chemistry with a poly(ethylene oxide) methyl ether methacrylate-block-poly(dimethylsiloxane)-block-poly(ethylene oxide) methyl ether methacrylate triblock copolymer acting as the templating agent. The sol–gel components—hydrochloric acid, titanium tetraisopropoxide, and triblock copolymer—are varied to investigate their effect on the resulting titania morphology. An increased titania precursor or polymer content yields smaller primary titania structures. Microbeam grazing incidence small-angle X-ray scattering measurements, which are analyzed with a unified fit model, reveal information about the titania structure sizes. These small structures could not be observed via the used microscopy techniques. The interplay among the sol–gel components via our triblock copolymer results in different sized titania nanoparticles with higher packing densities. Smaller sized titania particles, (∼13–20 nm in diameter) in the range of exciton diffusion length, are formed by 2% by weight polymer and show good crystallinity with less surface defects and high oxygen vacancies.
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发表时间: 1993-06-01
期刊: APPLIED PHYSICS B-PHOTOPHYSICS AND LASER CHEMISTRY
影响因子: --
作者:
FORSS, L;SCHUBNELL, M
通讯作者: SCHUBNELL, M
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发表时间: 2005-01-31
影响因子: 4
作者:
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