11-09 :: September 2011
nanotimes News in Brief
the researchers have shown that the antennas can be fabricated densely over large areas using cheap colloidal lithography.
The research field of nanoplasmonics is a rapidly growing area, and concerns controlling how visible light behaves at the nanoscale using a variety of metal nanostructures. Scientists now have a whole new parameter – asymmetric material composition – to explore in order to control the light.
Nanoplasmonics can be applied in a variety of areas, says Mikael Käll, professor in the research group at Chalmers.
Researchers of the Chemical Engineering depart- ment and the Kavli institute of the TU Delft have demonstrated that electrons can move freely in layers of linked semiconductor nanoparticles under the influence of light. This new knowledge will be very useful for the development of cheap and effi- cient quantum dot solar cells.
Elise Talgorn, Yunan Gao, Michiel Aerts,Lucas T. Kunne- man, Juleon M. Schins, T. J. Savenije, Marijn A. van Huis, Herre S. J. van der Zant, Arjan J. Houtepen & Laurens D. A. Siebbeles: Unity quantum yield of photogenerated charges and band-like transport in quantum-dot solids, In: Nature Nanotechnology AOP, September 25, 2011, DOI:10.1038/nnano.2011.159: http://dx.doi.org/10.1038/nnano.2011.159
The nanoantenna acts as a router for red and blue light, due to the nanoparticles of gold and silver having diffe- rent optical properties. © Timur Shegai
Timur Shegai, Si Chen, Vladimir D. Miljković, Gülis Zengin, Peter Johansson, Mikael Käll: A bimetallic nano- antenna for directional colour routing, In: Nature Com- munications, Vol. 2(2011), September 2011, Article number: 481, DOI:10.1038/ncomms1490: http://dx.doi.org/10.1038/ncomms1490
Masaaki Tamura, Kansas State University (U.S.) professor of anatomy and physiology, and his research team are working on several projects that use nanoparticles to treat and directly target the “bull‘s-eye”: cancer cells. Tamura has focused his research on peptide nanoparticle-based gene therapy, which is the process of treating diseases by introducing therapeutic genes. His research team is collaborating with University of Kansas researchers to develop a way to treat cancer other than current chemotherapy practices.
Tamura has found the potential for safer therapy in cationic peptide nanoparticles. This small peptide helps transfer an important gene called angiotensin