Linear and nonlinear optical properties of gold nanocrystal-incorporated mesoporous silica thin films

Synthesis and applications of mesoporous nanocomposites containing metal nanoparticles

“…In all cases, reduction of the metal ions into metallic particles is the last step. The reduction can be performed by thermal treatment [23], UV irradiation [27,[35][36][37] or by chemical reduction, using formaldehyde [38,39], hydrogen gas [25,29,31,32,36,[40][41][42] or NaBH 4 [30,34,39], among other reducing agents. It has been demonstrated that the NP size and spatial distribution within the film depends on the specific reducing treatment [28], particularly on the strength of the selected reducing agent.…”

“…By using these composites, it is possible to ensure a high dispersion and a good distribution uniformity of the NP in the films and thus, the nonlinear optical properties can be carefully controlled. With this approach, relatively high third order nonlinear optical susceptibilities (v (3) ) were obtained, by using Au@MP TiO 2 [40,66] and Au@MP SiO 2 composites [31,32,41]; and it was even possible to control the v (3) value by controlling the amount of Au incorporated in the matrix [32].…”

TiO2 mesoporous thin film architecture as a tool to control Au nanoparticles growth and sensing capabilities

“…30 Such differences over the metallic NPs growth have consequences over the final properties of the composite. In particular, it has been shown that electrochemical sensing activity, 31,32 electrical conductivity, 33 and nonlinear optical properties 34 depend on the mesoporous size, interconnectivity and accessibility.…”

Surfactant-dependant thermally induced nonlinear optical properties of l-ascorbic acid-stabilized colloidal GNPs and GNP–PVP thin films

“…In this study, they established the dependence of c (3) on the size of the gold nanoparticles and concentration. Fang et al 19 reported the third-order optical nonlinearities of gold nanoparticles incorporated in mesoporous silica thin lms. In this study, they found that the linear and nonlinear optical properties can be tuned by changing the factors such as particle size, shape, and lling factor as well as by changing experimental conditions such as the use of different surfactants and calcination.…”