Localized Surface Plasmon Resonance Sensing Properties of Ag/TiO2 Films

Abstract

Ag nanoparticles were deposited on TiO2 films (Ag/TiO2 films) by photocatalytic means. When the film was immersed in various kinds of alcohols, the linear relationship was observed between the wavelength of localized surface plasmon resonance peak and the refractive index of the alcohols in the range of 1.33–1.41. The Ag/TiO2 films can be applied to the SPR sensors.

Preparation of M@BiFeO3 Nanocomposites (M = Ag, Au) Bowl Arrays with Enhanced Visible Light Photocatalytic Activity

“…On the one hand, these samples have larger surface area‐to‐volume ratios, which lead to stronger photon absorption. On the other hand, it may be ascribed to the LSPR effect of spatially confined electrons in metallic Ag NPs . The higher absorption in the visible range may implicate higher activity in photocatalysis.…”

“…On the other hand, it may be ascribed to the LSPR effect of spatially confined electrons in metallic Ag NPs. [37][38][39] The higher absorption in the visible range may implicate higher activity in photocatalysis. The visible-light photocatalytic property of the BFO bowl arrays and BFO bowl array coated with 10 nm Ag film, followed by annealing at 400°C for 20, 40, 60, and 80 min were evaluated by the degradation of RhB solution.…”

Localized surface plasmon resonance sensing properties of photocatalytically prepared Ag/TiO2 films

“…6,7 A linear relationship was observed between the peak wavelength and the n 20 D of the alcohols in the range of 1.33 to 1.41. 6,7 It is also reported that the absorbance and peak wavelength of the LSPR absorption of metal nanoparticles are influenced by the size and shape of the metal particles themselves, the density of the particles, and the kinds of substrates on which they are deposited. 16 However, the effects of the number, size, and shape of the Ag nanoparticles on the sensitivity of the SPR sensors with the Ag/TiO 2 films have not been clarified.…”

“…[8][9][10] Only a few papers reported the controllable formation of monodispersed metal nanoparticles by using the photoreduction method. 11 In our previous studies, 6,7 we have reported that the Ag/TiO 2 films showed the SPR sensing properties for the alcohols in the refractive index range of 1.33 to 1.41. However, the sensitivity of the SPR sensor using the Ag/TiO 2 films with different sizes and shapes of Ag nanoparticles has not been clarified.…”

“…The SPR sensors with Au and Ag nanoparticles avoid the complicated traditional optical instrument in the measurement. [4][5][6][7] Among the precious metal nanoparticles, special attention has been devoted to Ag nanoparticles. This focus is because Ag is a cheaper and biocompatible metal compared with Au and Pt.…”