Novel core-shell (TiO2@Silica) nanoparticles for scattering medium in a random laser: higher efficiency, lower laser threshold and lower photodegradation

被引：49
|
作者：
Jimenez-Villar, Ernesto [1 ]
Mestre, Valdeci [2 ]
de Oliveira, Paulo C. [2 ]
de Sa, Gilberto F. [3 ]
机构：
[1] Univ Valencia, Inst Ciencia Mol, Paternan 46980, Spain
[2] Univ Fed Paraiba, Dept Fis, BR-58051970 Joao Pessoa, Paraiba, Brazil
[3] Univ Fed Pernambuco, Dept Quim Fundamental, BR-50670901 Recife, PE, Brazil
来源：
NANOSCALE | 2013年 / 5卷 / 24期
关键词：
SILICA-COATED TITANIA; PBTE QUANTUM DOTS; LIGHT; ABLATION; LOCALIZATION; FABRICATION; NANOSECOND; ETHANOL; POWDER; LIQUID;
D O I：
10.1039/c3nr03603k
中图分类号：
O6 [化学];
学科分类号：
0703 ;
摘要：
There has been growing interest in scattering media in recent years, due to their potential applications as solar collectors, photocatalyzers, random lasers and other novel optical devices. Here, we have introduced a novel core-shell scattering medium for a random laser composed of TiO2@Silica nanoparticles. Higher efficiency, lower laser threshold and long photobleaching lifetime in random lasers were demonstrated. This has introduced a new method or parameter ( fraction of absorbed pumping), which opens a new avenue to characterize and study the scattering media. Optical chemical and colloidal stabilities were combined by coating a suitable silica shell onto TiO2 nanoparticles.
引用
收藏
页码：12512 / 12517
页数：6
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