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Semiconductor nanocrystals of essentially every composition can nowadays be synthesized in large quantities by inexpensive and versatile solution based approaches. Recent advances in solution-phase colloidal synthesis and self-assembly allow us to control the size, shape, arrangement, and topology of nanomaterials, enabling complex multi-component structures to be created by design with nanometer precision, and offering new ways for manipulating wavefunctions and excitons. Due to their size-dependent optical properties and versatile surface chemistry, colloidal semiconductor nanocrystals are particular attractive objects for use as building blocks in different functional nanostructures, often in combination with other components. We will review our recent efforts on fabrication and optical studies of hybrid nanostructures comprising semiconductor nanocrystals with a specific aim of designing energy and/or charge transfer between components, and demonstrate their use in photovoltaics and biolabeling [1-3].
[1] A. L. Rogach. Fluorescence Energy Transfer in Hybrid Structures of Semiconductor Nanocrystals. Nano Today 2011, 6, 355-365. [2] S. Gimenez, A. L. Rogach, A. A. Lutich, D. Gross, A. Poeschl, A. S. Susha, I. Mora-Sero, T. Lana-Villarreal, J. Bisquert. Energy Transfer versus Charge Separation in Hybrid Systems of Semiconductor Quantum Dots and Ru-Dyes as Potential Co-Sensitizers of TiO2-based Solar Cells. J. Appl. Phys. 2011, 110, 014314. [3] Y. Wang, S. Li, S. V. Kershaw, F. Hetsch, A. Y. Y. Tam, G. Shan, A. S. Susha, C.-C. Ko, V. W. W. Yam, K. K. W. Lo, A. L. Rogach. Design of a Water-Soluble Hybrid Nanocomposite of CdTe Quantum Dots and an Iridium-Complex for Photoinduced Charge Transfer. ChemPhysChem 2012, in press. |
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