Dresden 2006 – wissenschaftliches Programm

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AKB: Biologische Physik

AKB 20: Nano-Biomaterials and Devices

AKB 20.2: Hauptvortrag

Donnerstag, 30. März 2006, 10:15–10:45, ZEU 255

Synthesis, properties and perspectives of complex nanocrystal structures — •Liberato Manna — National Nanotechnology Laboratory of CNR-INFM, Distretto Tecnologico - Isufi, Via Arnesano Km 5, 73100 Lecce, ITALY

Research on colloidal nanocrystals has moved from the synthesis of simple structures, such as spherical nanoparticles, to more elaborate shapes such as rods,[1-3] stars, discs, branched nanocrystals [1,4] and recently to nanoparticles based on inorganic sections interconnected without the need of organic linkers.[5-8] Nanocrystal heterostructures represent a convenient approach to the development of nanoscale building blocks, as they group inorganic sections with different functionalities in the same particle. The present talk will give an overview of the synthetic strategies to complex nanocrystals and will highlight their structural properties, as well as the perspectives in this field.

[1] Manna, L.; Scher, E. C.; Alivisatos, A. P., Synthesis of soluble and processable rod-, arrow-, teardrop-, and tetrapod-shaped CdSe nanocrystals. Journal of the American Chemical Society 2000, 122, (51), 12700-12706.

[2] Peng, X. G.; Manna, L.; Yang, W. D.; Wickham, J.; Scher, E.; Kadavanich, A.; Alivisatos, A. P., Shape control of CdSe nanocrystals. Nature 2000, 404, (6773), 59-61.

[3] Hu, J. T.; Li, L. S.; Yang, W. D.; Manna, L.; Wang, L. W.; Alivisatos, A. P., Linearly polarized emission from colloidal semiconductor quantum rods. Science 2001, 292, (5524), 2060-2063.

[4] Manna, L.; Milliron, D. J.; Meisel, A.; Scher, E. C.; Alivisatos, A. P., Controlled growth of tetrapod-branched inorganic nanocrystals. Nature Materials 2003, 2, (6), 382-385.

[5] Milliron, D. J.; Hughes, S. M.; Cui, Y.; Manna, L.; Li, J. B.; Wang, L. W.; Alivisatos, A. P., Colloidal nanocrystal heterostructures with linear and branched topology. Nature 2004, 430, (6996), 190-195.

[6] Kudera, S.; Carbone, L.; Casula, M. F.; Cingolani, R.; Falqui, A.; Snoeck, E.; Parak, W. J.; Manna, L., Selective growth of PbSe on one or on both tips of colloidal semiconductor nanorods. Nano Letters 2005, 5, (3), 445-449.

[7] Mokari, T.; Rothenberg, E.; Popov, I.; Costi, R.; Banin, U., Selective growth of metal tips onto semiconductor quantum rods and tetrapods. Science 2004, 304, (5678), 1787-1790.

[8] Gu, H. W.; Zheng, R. K.; Zhang, X. X.; Xu, B., Facile one-pot synthesis of bifunctional heterodimers of nanoparticles: A conjugate of quantum dot and magnetic nanoparticles. Journal of the American Chemical Society 2004, 126, (18), 5664-5665.