Metal oxide rods and dots-based structures and devices: cost-effective fabrication and surface chemistry control
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1209-P01-07
Metal oxide rods and dots-based structures and devices: Cost-effective fabrication and surface chemistry control Lionel Vayssieres International Center for Materials NanoArchitectonics, National Institute for Materials Science, Namiki 1-1, Tsukuba, 305-0044 Japan ABSTRACT The necessity of materials development which is not limited to materials that can achieve their theoretical limits, but makes it possible to raise theoretical limits by changing the fundamental underlying physics and chemistry while keep the fabrication cost to a minimum is crucial. Materials nanotechnologies based on chemical fabrication approaches is one of the immediate answer to the enormous need for cost-effective new materials for energy, environment, and health. R&D and businesses exploiting chemical nanotechnology has the greatest potential to efficiently contribute to such challenging goals. Indeed, the creation of new materials with higher performance and improved stability achieved by atomic, molecular and nanostructural design and control using unique nanoscale phenomena such as quantum confinements is the key. A synthesis involving the aqueous condensation of metal ions from solutions of metal salts for the low-cost fabrication of engineered arrays consisting of oriented nanorods of metal oxides orientations onto various substrates as well as the ability to control the surface acidity of quantum dots from acidic to neutral to basic by size effect are presented INTRODUCTION New materials bring new knowledge and new fields of science which in turn evolve into new technologies. In many respects, materials can be considered as the parents of almost all technologies. Most technological breakthrough has been achieved by the development of new materials (and technologies based on them). New technologies create new industries, which in turn provide jobs as well as better and more secure living conditions and societies [1]. It is well established by economists (and not just scientists) that long term economic growth depends on innovation and technological progress (which account for about 90% of the economic growth). However, to address these new challenges, current materials and conventional technologies are simply not good enough. The necessity of materials development which is not limited to materials that can achieve their intrinsic theoretical limits, but makes it possible to raise those limits by changing the fundamental underlying physics and chemistry is crucial. The demand of novel multi-functional materials is a major challenge for scientists to address to solve crucial contemporary issues such as energy, environment and health. For instance, the transition of energy resource from its fossil fuel-based beginning to a clean and renewable technology relies on the widespread implementation of solar-related energy systems, however the high cost of energy production and relatively low efficiency of currently used material combinations pose an intrinsic limitation. (R)evolutionary development is required to achieve the necessar
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