Fluorophore-Free Luminescent Organosilica Nanoparticles
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- 作者：Lin Wang ; M.-Carmen Esté ; vez ; Meghan O'Donoghue ; Weihong Tan
- 刊名：Langmuir
- 出版年：2008
- 出版时间：March 4, 2008
- 年：2008
- 卷：24
- 期：5
- 页码：1635 - 1639
- 全文大小：391K
- 年卷期：v.24,no.5(March 4, 2008)
- ISSN：1520-5827
文摘
In this paper, we report the preparation and characterization of fluorophore-free luminescent organosilica nanoparticles(NPs) with sizes varying from 50 to 250 nm. These NPs were synthesized by the Stöber method by incorporatingseveral organosilanes together with the silicate precursor (tetraethyl orthosilicate, TEOS) to the silica matrix. Thecalcination of these NPs at high temperatures (600 and 700 
C) led to fluorescent and phosphorescent properties, whichproved to be highly dependent on the initial composition of the silanization mixture and the heating temperature.Further characterization of this material in terms of its structural and optical properties is reported. Although the NPsare not very bright, the lifetime measurements revealed values in the millisecond range, which makes these NPspotentially attractive as luminescent materials and for time-resolved optical spectroscopic studies and bioassays.
C) led to fluorescent and phosphorescent properties, whichproved to be highly dependent on the initial composition of the silanization mixture and the heating temperature.Further characterization of this material in terms of its structural and optical properties is reported. Although the NPsare not very bright, the lifetime measurements revealed values in the millisecond range, which makes these NPspotentially attractive as luminescent materials and for time-resolved optical spectroscopic studies and bioassays.