A hybrid mat consisting of anatase-phase TiO2 nanofibers (similar to 75 wt.%) and structurally amorphous SiO2 nanofibers (similar to 25 wt.%) was prepared for the first time by electrospinning with dual spinnerets followed by pyrolysis in air at 500 degrees C. Unlike many other TiO2 nanostructures, the TiO2/SiO2 hybrid mat was mechanically flexible; after being sensitized with N719 dye, the dye-sensitized mat was then assembled as a photo-detector for visible light. The fabricated photo-detector was also flexible; it exhibited excellent sensitivity and reproducibility/reversibility under varied light intensities, and it also showed high performance under the bending condition. Additionally, it is envisioned that the reported method could be a general approach for the preparation of flexible hybrid mats with different electrospun nanofibers of semiconducting metal oxides (e.g., TiO2 and ZnO) for various applications. (C) 2014 Elsevier B.V. All rights reserved.