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5


Teoret. i eksperim. khimiya. 2004. Vol.40 No. 2. p. 91-99

Photochemical Synthesis, Spectral and Electrophysical Properties
of Composite ZnO/Ag Nanoparticles

 

A. L. Stroyuk, V. V. Shvalagin, S. Ya. Kuchmy


L. V. Pysarzhevsky Institute of Physical Chemistry, National Academy of Sciences of Ukraine
31 Prosp. Nauky, 03028 Kyiv, Ukraine. E-mail: photochem@ukrpost.net


Photochemical synthesis of ZnO/Ag nanoparticles was carried out in 2-propanolic solutions. Their optical properties were studied and parameters of plasmon resonance bands of silver nanoparticles within the ZnO/Ag composites were calculated. It was established that hypsochromic shifts of silver plasmon bands under the irradiation of nanocomposite arise due to the accumulation of excessive electrons on ZnO/Ag nanoparticle, the last resulting in the equilibration of conduction band potentials of semiconductor and metal components of the composite.


Key words nanoparticles of semiconductors, nanoparticles of metals, metal-semiconductor composites, zinc oxide, sil-
ver, photochemical synthesis.