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ZnO nanostructures have been electrochemically synthesized on three-dimensional, interconnected, and porous carbon nanofiber Buckypaper substrates. Using potentiostatic deposition, wurtzite ZnO with controlled microstructure and morphology has been deposited. While all ZnO deposits exhibit a band gap value of around 3.2 eV, impurity states determined by photoluminescence (PL) measurements show strong...