0000000000684308

AUTHOR

Valdeci Mestre

showing 2 related works from this author

Random Lasing of Rhodamine 6G Solution Containing TiO2:Silica Core:Shell Nanoparticles

2012

High efficiency and low rate of photodegradation was obtained in a random laser suspending TiO2@Silica nanoparticles in ethanol solution of Rhodamine 6G. The TiO2 nanoparticles were coated with a silica shell prepared via Stober method.

Rhodamine 6Gchemistry.chemical_compoundMaterials scienceDye laserRandom laserchemistryChemical engineeringShell (structure)NanoparticleComposite materialPhotodegradationRefractive indexLasing thresholdLatin America Optics and Photonics Conference
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Novel core–shell (TiO2@Silica) nanoparticles for scattering medium in a random laser: higher efficiency, lower laser threshold and lower photodegrada…

2013

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.

Random laserMaterials sciencebusiness.industryScatteringPhysics::OpticsNanoparticleengineering.materialLaserPhotobleachinglaw.inventionColloidOpticsCoatinglawengineeringOptoelectronicsGeneral Materials SciencePhotodegradationbusinessNanoscale
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