EAN: 9783954892938

METAL-SEMICONDUCTOR HYBRID NANOPARTICLES HALOGE...

Metal-semiconductor hybrid nanoparticles combine materials with different physical properties
in one nanostructure. Charge separation processes and potentially increased conductivity in
thin film devices make them promising candidates for advanced applications in photocatalysis or
(opto) electronics. The work on hand deals with the preparation of CdSe nanoparticles that
later act as seeds for the defined deposition of metals and with the electrical
characterisation of monolayers of the resulting hybrid structures. In context with the shape
control of the semiconductor component in a hot injection synthesis  the role of halogen
compounds and the influence of their molecular structure are examined. Analytically as well as
theoretically supported explanations for the formation of the evolving hexagonal pyramidal
shape  which is especially favourable for metal deposition  are presented. The deposition of
different metals onto the obtained semiconductor components is examined and unusual
instabilities of an Au shell on CdSe hybrid nanoparticles are investigated. Furthermore  the
impact of deposited Pt on the electrical transport of CdSe nanopyramids is demonstrated.

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