NanoScienceWorks

Andrey Rogach Ph.D.

Andrey Rogach's research interests focus on the chemistry and physics of nanometer-sized materials, with an emphasis on the synthesis, supramolecular chemistry and spectroscopy of colloidal metal and semiconductor nanocrystals. Using the colloidal chemistry approaches, his group synthesizes semiconductor and metal nanorystals of variable sizes, shapes and compositions, tuning the emission of semiconductor nanocrystals and surface plasmon resonances of metal nanoparticles through the visible and near-IR spectral range.

Dr. Rogash's group focuses on research on colloidal semiconductor (quantum dots) and metal nanocrystals. Colloidal nanocrystals, with their variable surface chemistry determined by a reach choice of capping ligands are ideal building blocks for fabrication of different hybrid nanostructures. His group applys optical spectroscopy to study energy transfer and charge separation in these nanostructures and look for different applications of semiconductor and metal nanocrystals, ranging from photovoltaics and water splitting to biological fluorescent labels and SERS substrates.

After finishing his PhD in 1995 on the “Formation and properties of ultrafine silver particles in different media” Dr. Rogach mainly worked with semiconductor nanocrystals. A number of new wet chemical syntheses of nanocrystals with strong, size-dependent emission in the visible and near-IR range were developed, and their structural and optical characterization was done.

Dr. Rogach's team widely used and further developed fabrication methods leading to the nanocrystals-containing composite materials like layer-by-layer assembly on planar substrates and colloidal particles. In the last years I was increasingly dealing with applications of semiconductor nanocrystals in the areas where their unique luminescent properties are highly desirable. The results of these activities are reflected in the list of publication.

His interests also cover formation of hybrid nanocrystal structures, Förster resonance energy transfer in composite systems containing semiconductor nanocrystals, and the use of water-soluble semiconductor nanocrystals as luminescent markers in biological systems.

Books

Contributor to Dekker Encyclopedia of Nanoscience and Nanotechnology

Important Articles

• Atomic Force Microscopy and Optical Microscopy Measurements as a Method to Investigate Particle Uptake by Cells. Small (2006)
• nterplay between Auger and Ionisation Processes in Nanocrystal Quantum Dots. J. Phys. Chem. (2005) with R. M. Kraus, P. G. Lagoudakis, A. L. Rogach, J. M. Lupton, J. Feldmann, D. V. Talapin, H. Weller.
• Monitoring Surface Charge Migration in the Spectral Dynamics of Single CdSe/CdS Nanodot/Nanorod Heterostructures. Phys. Rev. B (2005) with J. Müller, J. M. Lupton, A. L. Rogach, J. Feldmann, D. V. Talapin, H. Weller
• Wave Function Engineering in Elongated Semiconductor Nanocrystals with Heterogeneous Carrier Confinement. NanoLett. (2005) with 100.) J. Müller, J. M. Lupton, P. Lagoudakis, R. Koeppe, A. Rogach, J. Feldmann, D. Talapin, H. Weller.
• Reply: Self-Assembly of Monodisperse Nanocrystals into Facetted Crystal Superlattices. Adv. Mater. (2005) with D. V. Talapin, E. V. Shevchenko, N. Gaponik, I. L. Radtchenko, A. Kornowski, M. Haase, A. L. Rogach, H. Weller

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