Morphology control and application aspects of gold nanoparticles

DIPC Seminars

Prof. Andrey L. Rogach, Department of Physics and Materials Science, City University of Hong Kong
Donostia International Physics Center (DIPC).Paseo Manuel de Lardizabal, 4 (nearby the Facultad de Quimica), Donostia
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Morphology control and application aspects of gold nanoparticles Morphology control and application aspects of gold nanoparticles Andrey L. Rogach Department of Physics and Materials Science & Centre for Functional Photonics, City University of Hong Kong, Tat Chee Avenue, Kowloon, Hong Kong __ Noble metal nanoparticles have been the subject of widespread research over the past decades. The bottom-up colloid chemical synthesis has emerged as a powerful and economical design tool for morphology control in metal nanoparticles.1 Anisotropic features associated with their non-spherical morphologies offer numerous innovative potentials for technological applications.2 In this lecture, some of the synthetic and application aspects related to the noble metal nanoparticles of complex shapes will be reviewed, with a focus on gold nanoshells for optical sensing3 and gold nanostars for surface enhanced Raman scattering (SERS).4 Gold nanoparticles and their aggregates5 offer ample opportunities for a controlled local heating,6 which may be important for remote release of encapsulated materials and development of novel drug delivery systems.7,8 The luminescence properties of few-atom thiolated Au clusters9 will be shortly discussed. **References** 1. T. K. Sau, A. L. Rogach. Nonspherical Noble Metal Nanoparticles: Colloid-Chemical Synthesis and Morphology Control. Adv. Mater. 2010, 22, 1781. 2. T. K. Sau, A. L. Rogach, F. Jäckel, T. A. Klar, J. Feldmann. Properties and Applications of Colloidal Nonspherical Noble Metal Nanoparticles. Adv. Mater. 2010, 22, 1805. 3. G. Raschke, S. Brogl, A. S. Susha, A. L. Rogach, T. A. Klar, J. Feldmann, B. Fieres, N. Petkov, T. Bein, A. Nichtl, K. Kürzinger. Gold Nanoshells Improve Single Nanoparticle Molecular Sensing. NanoLett. 2004, 4, 1853. 4. C. Hrelescu, T. K. Sau, A. L. Rogach, F. Jäckel, J. Feldmann. Single Gold Nanostars Enhance Raman Scattering. Appl. Phys. Lett. 2009, 54, 153113. 5. A. G. Skirtach, C. Déjugnat, D. Braun, A. S. Susha, A. L. Rogach, G. B. Sukhorukov. Nanoparticles Distribution Control by Polymers: Aggregates versus Non-Aggregates. J. Phys. Chem. C, 2007, 111, 555. 6. A. G. Skirtach, Ch. Dejugnat, D. Braun, A. S. Susha, A. L. Rogach, W. J. Parak, H. Möhwald, G. B. Sukhorukov. The Role of Metal Nanoparticles in Remote Release of Encapsulated Materials. NanoLett. 2005, 5, 1371. 7. T. K. Sau, A. S. Urban, S. K. Dondapati, M. Fedoruk, M. R. Horton, A. L. Rogach, F. D. Stefani, J. O. Rädler, J. Feldmann. Controlling Loading and Optical Properties of Gold Nanoparticles on Liposome Membranes. Coll. Surf. A 2009, 342, 92. 8. G. B. Sukhorukov, A. L. Rogach, M. Garstka, S. Springer, W. J. Parak, A. Munoz-Javier, O. Kreft, A. G. Skirtach, A. S. Susha, Y. Ramaye, R. Palankar, M. Winterhalter. Multifunctionalized Polymer Microcapsules: Novel Tools for Biological and Pharmacological Applications. Small 2007, 3, 944. 9. A. S. Susha, M. Ringler, A. Ohlinger, M. Paderi, N. LiPira, G. Carotenuto, A. L. Rogach, J. Feldmann. Strongly Luminescent Films Fabricated by Thermolysis of Gold-Thiolate Complexes in a Polymer Matrix. Chem. Mater. 2008, 20, 6169. **Andrey L. Rogach** is a Professor at the Department of Physics and Materials Science, City University of Hong Kong. He received his Ph.D. in chemistry (1995) from the Belarusian State University in Minsk, and worked at the University of Hamburg (Germany) from 1995 to 2002. From 2002–2009 he was a lead staff scientist at the Ludwig-Maximilians-Universität in Munich (Germany), where he completed his habilitation in experimental physics. Since 2008 he is also an Adjunct Professor at Trinity College Dublin (Ireland). His research focuses on synthesis, assembly and optical spectroscopy of colloidal semiconductor and metal nanocrystals and their hybrid structures, and their use for energy transfer, light harvesting, and biosensing. He has published more than 200 papers and book contributions in these areas, which have been cited more than 10,000 times so far. His name is on the list of Top 100 Materials Scientists and on the list of Top 20 Authors publishing on nanocrystals in the past decade by Thomson Reuters, ISI Essential Science Indicators.