Speaker: Prof. C N R Rao, FRS, Linus Pauling Research Professor & Honorary President Jawaharlal Nehru Centre for Advanced Scientific Research Jakkur, Bangalore
Abstract
Chemistry has played a major role in the synthesis and assembly of nanostructures. Thus, nanocrystals of metals, semiconducting chalcogenides and oxides of varying shapes and dimensions have been prepared by employing single-source precursors, solvothermal conditions and other soft chemical routes. A specially interesting innovation is the synthesis of ultrathin nanocrystalline films at the liquid-liquid interface. Nanowires of a variety of exotic inorganic materials have been synthesized recently, and many of them have required the use of ingeneous chemistry. It is noteworthy that nanowires of metals, chalcogenides, nitrides and oxides have all been obtained by soft chemical methods, as distinct from the well-known VLS, VS and template methods. In the case of nanotubes, the story is even more interesting. Chemical routes have been successful in the synthesis of carbon nanotubes, including Y-junction nanotubes, but equally importantly, new classes of inorganic nanotubes have been discovered in the last 3-4 years. These include nanotubes of metal chalcogenides, oxides and nitrides. Soft chemistry has been useful in the synthesis of nanotubes of inorganic materials such as oxides and sulfates. In this presentation, an overview of the design, synthesis and characterization of novel nanostructures will be provided, based on the work carried out in Bangalore.
Date: November 25, 2005 at 11.30 A.M.
| Close |