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Scalable free‐standing V2O5/CNT film. a) Schematic diagram illustrating the processes for preparing V2O5/CNT free‐standing film; b) Optical image of V2O5/CNT film with length over 13 cm; c) Optical image of highly dense V2O5/CNT film cover the surface of a bottle, inset is the contact angle of this film; d) SEM image of highly dense V2O5/CNT film; e) EDX mapping images (carbon, oxygen, and vanadium mapping). Reproduced with permission.33
