NSTI's annual nanotechnology conference provides the most prestigious forum in the world for leading nano scientists, and Nanotech 2007 is no exception. The papers from this years conference have been compiled into four volumes to create the most authoritative and comprehensive compendium now available across all of nanotechnology. Including the latest information on industrial development, investments, and ventures, each volume explores cutting-edge research and applications. Volume IV looks at nanoscale characterization, nanoparticles, and nanofabrication. It also considers Cleantech issues focusing on and environmental and energy issues including the development of fuel cells and other novel technology.