Conductive properties of TiO2 nanoparticles and TiO2/BC hybrid inorganic/organic fibres were investigated by electrostatic force microscopy (EFM). TiO2/BC hybrid composites were prepared based on bacterial cellulose produced by Gluconobacter xylinum, being the bacterial cellulose as a hydrophilic substrate for TiO2 nanoparticles synthesized via sol-gel. Taken into account hydrophilic nature of the cellulose, TiO2 nanoparticles were located on the surface of the fibres due to hydrogen bonding interactions. EFM was used to determine qualitatively conductive properties of TiO2 nanoparticles and their TiO2/BC hybrid inorganic/organic fibres. Results indicate that TiO2/BC hybrid fibres respond to applied bias regardless of the sign of the applied voltage. (C) 2012 Published by Elsevier Inc.