Hybrid polymer/nanocrystals structures: fabrication and studies of energy transfer, charge generation and transport
Final Report Abstract
We developed a facile grafting-from strategy towards the synthesis of inorganic-organic composites of semiconductor nanocrystals and wide-bandgap polymers. Amino-functional fluorenes have been used as co-ligands for CdSe nanocrystals, thus enabling to design their surface directly during the synthesis. Highly monodisperse, strongly emitting CdSe nanocrystals have been obtained. Subsequently, a straightforward Yamamoto C-C coupling protocol was used to carry out surface polymerisation, hence modifying CdSe nanocrystals with oligo- and poly(fluorene) moieties. Both amino-fluorene capped CdSe nanocrystals and the resulting nanocrystal-polymer composites were characterized in detail by optical and FT-IR spectroscopy, TEM, AFM, and gel permeation chromatography, showing their potential as novel functional inorganic-organic hybrid materials.
Publications
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Cascaded FRET in Conjugated Polymer / Quantum Dot / Dye-labeled DNA Complexes for DNA Hybridization Detection. ACS NANO, Vol.3. 2009, pp. 4127-4131.
G. Jiang, A. S. Susha, A. A. Lutich, F. D. Stefani, J. Feldmann, A. L. Rogach
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Energetic Disorder Limits Energy Transfer in Semiconductor Nanocrystal – DNA – Dye Conjugates. Appl. Phys. Lett. 2009, 95, 143101
K. Becker, A. L. Rogach, J. Feldmann, D. V. Talapin, J. M. Lupton
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Energy Transfer versus Charge Separation in Type-II Hybrid Organic-Inorganic Nanocomposites. NanoLett. 2009, 9, 2636-2640
A. A. Lutich, G. Jiang, A. S. Susha, A. L. Rogach, F. D. Stefani, J. Feldmann
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Efficient Energy Transfer in Layered Hybrid Organic/Inorganic Nanocomposites: A Dual Function of Semiconductor Nanocrystals. Applied Physics Letters, Vol. 96. 2010, 083109
A. A. Lutich, A. Poeschl, G. Jiang, F. D. Stefani, A. S. Susha, A. L. Rogach, J. Feldmann
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Nanoscale Interaction between CdSe or CdTe Nanocrystals and Molecular Dyes Fostering or Hindering Directional Charge Separation. Small, Vol.6.2010, pp.221-225.
I. Mora-Sero, D. Gross, T. Mittereder, A. A. Lutich, A. S. Susha, T. Dittrich, A. Belaidi, R. Caballero, F. Langa, J. Bisquert, A. L. Rogach
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Inorganic-Organic Nanocomposites of CdSe Nanocrystals Surface-Modified with Oligo- and Poly(fluorene) Moieties. Journal of Materials Chemistry, Vol. 21. 2011, pp. 2656-2662.
I. Kanelidis, A. Vaneski, D. Lenkeit, S. Pelz, V. Elsner, R. M. Stewart, J. Rodriguez-Fernandez, A. A. Lutich, A. S. Susha, R. Theissmann, S. Adamczyk, A. L. Rogach, E. Holder
