Synthesis and characterization of CdS nanoparticles embedded in a polymethylmethacrylate matrix.
CdS nanopowder capped with sodium bis(2-ethylhexyl)sulfosuccinate was synthesized by using water-in-oil microemulsions. The CdS nanoparticles of about 5 nm obtained were embedded in polymethylmethacrylate matrix by a photocuring process. The transparent yellow solid compound was characterized by optical absorption and emission spectroscopy, high-resolution transmission electron microscopy, and energy-dispersive X-ray spectroscopy. The properties of this compound were compared with those of the nanopowder dispersed in heptane and in methylmethacrylate. The results obtained indicate that the nanoparticles are homogeneously dispersed in the matrix and do not change in size during the embedding process. Even if the surface slightly changes its luminescence properties, as a consequence of the different new chemical environment, the final product seems to be suitable for practical applications.
Pedone
Lucia
L
Università di Palermo, Dipartimento di Chimica Fisica and INSTM-UdR Palermo, Viale delle Scienze, Parco d'Orleans II, I-90128 Palermo, Italy. lucia.pedone@tin.it
Caponetti
Eugenio
E
Leone
Maurizio
M
Militello
Valeria
V
Pantò
Valentina
V
Polizzi
Stefano
S
Saladino
Maria Luisa
ML