Laser-induced direct space-selective precipitation of CdS nanoparticles embedded in a transparent silica xerogel.
A simple method, suitable for direct space-selective precipitation of semiconducting nanoparticles inside a transparent silica xerogel, is presented. The porous silica monoliths, prepared by the sol-gel method, are first loaded with specific CdS precursors. Then, the samples can be irradiated using either a femtosecond laser to generate the nanoparticles inside the deep volume of the silica matrix or a continuous visible laser to yield a nanocrystal growth under the surface. The resulting CdS nanoparticles are characterized using absorption and Raman spectroscopies, x-ray diffraction analysis and transmission electron microscopy.
El Hamzaoui
H
H
Laboratoire de Physique des Lasers, Atomes et Molécules (CNRS, UMR 8523), Centre d'Etudes et de Recherches Lasers et Applications (CERLA), Université de Lille 1, Villeneuve d'Ascq, France. hicham.elhamzaoui@phlam.univ-lille1.fr
Bernard
R
R
Chahadih
A
A
Chassagneux
F
F
Bois
L
L
Jegouso
D
D
Hay
L
L
Capoen
B
B
Bouazaoui
M
M