Issue 24, 2013

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

Abstract

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.

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

Supplementary files

Article information

Article type
Paper
Submitted
13 Jul 2013
Accepted
27 Sep 2013
First published
04 Oct 2013

Nanoscale, 2013,5, 12512-12517

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

E. Jimenez-Villar, V. Mestre, P. C. de Oliveira and G. F. de Sá, Nanoscale, 2013, 5, 12512 DOI: 10.1039/C3NR03603K

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