Surface enhanced Raman effect of Ag/TiO2 thin films with arbitrarily cut, flexible and reusable performance

Abstract In this work, the controllable Ag/TiO 2 SERS composites were successfully synthesized based on Ti foils with hydro-thermal treatment method. Flexible Ag/TiO 2 SERS substrates could be pasted onto the surface of object with arbitrary shape to detect organic pollutants. Using R6G as probe molecule, Ag/TiO 2 nonabelts could detect SERS signal up to 10 −7 M. TiO 2 can be used not only as the template of SERS substrate, but also as photo-catalytic material, which played a decisive role in photo-catalytic activity. The result of cycling experiment for the as-prepared SERS substrates indicated that it maintained good detection performance after 10 cycles.