Metal and semiconductor heteronanostructures
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Abstract
Energy, the environment and health have emerged as strategic priorities in all aspects of our lives. Hybrid materials have already demonstrated good promise in addressing and offering solutions in each of these priority areas. Particularly hybrid nanomaterials containing metal and semiconductor parts are prospective materials for the optoelectronics, photocatalysis and other applications at the nanoscale. Development of new approaches to create such materials is very important direction in nanotechnology.
In this thesis I report several different heterostructures synthesized by means of heterogeneous nucleation. Theoretical aspects of the growth strategies leading to heterostructured nanocrystals are explained together with the descriptions of common characterization techniques.
Approaches to obtain hollow gold nanostructures based on nanorods and gold-tipped CdTe and CdS hybrid materials are described in experimental chapters. These materials demonstrate high catalytic activity, sensitivity to refractive index changes and unusual optical properties as an ensemble and as single particles.