Structural features and existence of three photon absorption in Ag doped TiO2 nanoparticles, synthesized by sol–gel technique

Nonlinear Absorption Response Correlated to Embedded Ag Nanoparticles in BGO Single Crystal: From Two-Photon to Three-Photon Absorption

“…The two-photon absorption converts to three-photon absorption by the embedded Ag nanoparticles using the ion implantation technology. It should be noted that the observed three-photon absorption response is actually an effective three-photon absorption, which is arising from the two-photon absorption followed by excited state absorption 41 , 42 . Besides, the saturable absorption mechanism of Ag nanoparticles and the two-photon absorption of amorphous implanted BGO layer could also contribute to the obtained z scan results.…”

“…For Ag:BGO, the pump-probe result indicates the two-photon absorption after zero-time-delay because of the combined contribution of Ag nanoparticles and implanted BGO layer. On one hand, the excited state absorption caused by free carriers (generated by two-photon absorption) happens in the nanoparticle system 41 , 42 , 44 ; on the other hand, the two-photon absorption of the implanted BGO layer becomes much weaker due to the amorphous state. Besides, there is an un-obvious peak at the end of the valley, which indicates the SA mechanism is also exist but it is relatively weaker compared with the two-photon absorption mechanism and excited state absorption mechanism.…”

Antimicrobial activity of TiO2:Ag nanocrystalline heterostructures: Experimental and theoretical insights

“…The average nanocrystal particle-size distribution was The short-range order of TiO 2 and TiO 2 :Ag samples was investigated by FTRaman analysis. All Raman modes observed for the TiO 2 sample were attributed to the anatase phase, with peaks centered at 149, 200, 402, 518, and 642 cm -1 being related to the five Raman-active modes with the symmetries E g(1) , E g (2) , B 1g(3) , A 1g (4) , and E g (3) , respectively [24,42]. As recently reported from theoretical calculations, 518 cm -1 corresponds to a B 1g Raman-active mode [21].…”

Ag‐Doped TiO2Nanoparticles as an Effective Photocatalyst for Degradation of Indigo Carmine Dye under Visible Light

“…The pure and doped TiO 2 samples show a similar Raman peak pattern. All five Raman bands linked to the six Raman active modes had been observed, and a strong Raman peak at 144 cm À 1 confirms the anatase phase of TiO 2 [37,38] . Raman peaks related to other phases of TiO 2 and Silver were absent imply a well accordant with that of XRD.…”