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Three-dimensional (3-D) Nb 2 O 5 nanotube layers with honeycomb structures were successfully synthesized using polystyrene (PS) microsphere templates and NbO x nanocrystals. A densely packed monolayer of monodisperse PS microspheres was deposited onto a silica glass substrate using the Langmuir–Blodgett film technique. NbO x nanocrystals were prepared via proton-exchange...
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