Preparation of poly(N-vinylpyrrolidone)-stabilized ZnO colloid nanoparticles.
We propose a method for the synthesis of a colloidal ZnO solution with poly(N-vinylpyrrolidone) (PVP) as stabilizer. Stable colloidal solutions with good luminescence properties are obtained by using PVP as stabilizer in the synthesis of ZnO nanoparticles by a sol-gel method assisted by ultrasound. Nanoparticles with sizes of 30-40 nm in a PVP matrix are produced as a solid product. The colloidal ZnO/PVP/methanol solution, apart from the most intense PL band at 356 nm coming from the PVP, exhibits a strong PL band at 376 nm (3.30 eV) which corresponds to the emission of the free exciton recombination in ZnO nanoparticles.
Institute of Electronic Engineering and Nanotechnologies D. Ghitu, Academy of Sciences of Moldova, 3 Academiei str., Chisinau, MD-2028, Moldova.
Tatyana
T
Gutul
Institute of Electronic Engineering and Nanotechnologies D. Ghitu, Academy of Sciences of Moldova, 3 Academiei str., Chisinau, MD-2028, Moldova.
Emil
E
Rusu
Institute of Electronic Engineering and Nanotechnologies D. Ghitu, Academy of Sciences of Moldova, 3 Academiei str., Chisinau, MD-2028, Moldova.
Nadejda
N
Condur
Institute of Electronic Engineering and Nanotechnologies D. Ghitu, Academy of Sciences of Moldova, 3 Academiei str., Chisinau, MD-2028, Moldova.
Veaceslav
V
Ursaki
State University of Republic of Moldova, 60 Alexe Mateevici str., Chisinau MD-2009, Moldova.
Evgenii
E
Goncearenco
National Institute of Electrochemistry and Condensed Matter, 144 Dr. A. Paunescu Podeanu str., Timisoara 300569, Romania.
Paulina
P
Vlazan
colloidal solutions; nanocomposite; poly(N-vinylpyrrolidone); sol–gel; zinc oxide