title: Laser-induced photodynamic effects at silica nanocomposite based on cadmium sulphide quantum dots.
abstract: In this paper we study the laser-induced modification of optical properties of nanocomposite based on cadmium sulphide quantum dots encapsulated into thiomalic acid shell which were embedded into a porous silica matrix. We found red shift of luminescence of the nanocomposite when exposed to laser radiation at λ = 405 nm. Using pump-probe method and Small-Angle X-ray Scattering technique it was found that laser radiation at λ = 405 nm also increases the absorption coefficient of the nanocomposite in 15 times due to agglomeration of quantum dots. The modification of absorption properties is fully reversible.
authors: S S
authors: SS
authors: Voznesenskiy
authors: A A
authors: AA
authors: Sergeev
authors: A N
authors: AN
authors: Galkina
authors: Yu N
authors: YN
authors: Kulchin
authors: Yu A
authors: YA
authors: Shchipunov
authors: I V
authors: IV
authors: Postnova
mesh_terms: D019187:Cadmium Compounds / Q000737:chemistry* / Q000528:radiation effects; D007834:Lasers; D008163:Luminescent Measurements / Q000379:methods*; D008422:Materials Testing; D053761:Nanocomposites / Q000737:chemistry* / Q000528:radiation effects; D045663:Quantum Dots; D011829:Radiation Dosage; D012822:Silicon Dioxide / Q000737:chemistry* / Q000528:radiation effects; D013440:Sulfides / Q000737:chemistry* / Q000528:radiation effects
chemical_list: D019187:Cadmium Compounds; D013440:Sulfides; C034939:cadmium sulfide; D012822:Silicon Dioxide