One-dimensional semiconductors such as nanowires and nanotubes are attractive materials for incorporation in photovoltaic devices as they potentially offer short percolation pathways to charge-collecting contacts. We report the observation of free-electron lifetimes in TiOExpand abstract
2nanotubes of the order of tens of picoseconds. These lifetimes are surprisingly short compared to those determined in films of TiO 2nanoparticles. Samples of ordered nanotube arrays with several diffe...
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