Thermal annealing induced strong photoluminescence enhancement in Ag-TiO2 plasmonic nanocomposite thin films

Ag-enriched TiO2 nanocoating apposite for self-sanitizing/ self-sterilizing/ self-disinfecting of glass surfaces

“…to tune the band structure of TiO 2 semiconductor by doping with Ag metal in order to boost the visible-light absorption without diminishing photocatalytic efficiency [ 26 , 28 , [35] , [36] , [37] , [38] ]. The excitation spectra of anatase Ag–TiO 2 NCs were achieved by detecting photons emitted from the atoms in the excited state at an emission wavelength of 285 nm in the TiO 2 emission-range while scanning the excitation for different wavelengths in the TiO 2 absorption-range.…”

The Response of UV/Blue Light and Ozone Sensing Using Ag-TiO2 Planar Nanocomposite Thin Film

“…The transmission spectra of AT10 and AT20 reveal a redshift due to the influence of the added silver nanoparticles. The spectra of AT10, AT20, AT30, and AT40 exhibit transmission edges at ~330 nm and a broad wave around 500 nm [17,19,20,29,30]. The transmission spectra of the semiconductor and metal nanoparticles overlap, which indicates that the TiO 2 and Ag metal nanoparticles were simultaneously excited by the light.…”

“…Via the SPR effect, the metal-nanoparticle composite provides additional electrons to the semiconductor. Different metal nanoparticles (Ag, Au) doped on MOSs are widely used in many fields to generate SPR and enhance photocatalysis; they are also used in gas sensors, environmental protection technologies, solar cells, energy storage devices, and photoelectric materials [17,18,19]. For example, researchers have applied SPR with magnetic microspheres for prion protein detection [20,21,22], a magnetic biochip (Au/Fe 2 O 3 /Au) for antigen detection [23], core-shell γ -Fe2O3@Au nanoparticles for low-field nuclear magnetic resonance [24], a gold film-coated side-polished fiber for temperature sensor fabrication [25], and Au@SiO 2 core-shell NPs into TiO 2 scaffold layer to increase the power conversion efficiency of solar cells [26].…”

“…With their excellent characteristics, MOSs doped with metal nanoparticles are highly desirable composite materials. In this study, we discuss the Ag-TiO 2 planar composite film [17]. The methods used in the complexation of metal nanoparticles in TiO 2 are primarily chemical-based.…”

“…However, it is difficult to ensure the uniform doping of silver nanoparticles in TiO 2 for large-scale and mass production [18,19,27,28,29]. We coated silver nanoparticles with TiO 2 by electron-beam (e-beam) evaporation during the semiconductor fabrication process to ensure that the silver nanoparticles were in complete contact with the TiO 2 , without the use of high-temperature annealing, while still successfully sensing 100 ppb ozone [17]. This approach can significantly improve the practical application of silver particles in areas such as the manufacturing of gas sensors and wearable devices.…”