Optical study of Ag-TiO₂nanocermet thin films prepared by R.F. co-sputtering

Embedding Ag Nanoparticles into MgF2 Nanorod Arrays

“…For example, metal or semiconductor nanoparticles embedded in dielectric or polymer materials show distinct optical properties for potential applications in optics, optoelectronics, optical coating for solar energy collection and conversion, sensing, and bioengineering; [2,3] Transition metal catalysts improve the hydrogen storage thermodynamics and kinetics of metal (like Mg) hydrides for the development in solid state hydrogen storage application; [1] Single wall carbon nanotube polymer composite shows ultrafast optical switching properties for high-quality all-optical switches; [5] etc. Intense efforts have been carried out to develop various methods for fabricating novel nanocomposites/doped nanomaterials, mainly via chemical and physical routes, including sol-gel, [6] ball milling, [1] ion implantation, [7] ultrasound radiation, [8] electrodeposition, [9] chemical vapor deposition, [10] physical vapor co-deposition (co-evaporation and co-sputtering), [11][12][13][14][15][16][17][18][19][20][21] and hybrid growth techniques. [2] Using these methods, most of the obtained nanocomposites/doped nanomaterials are in the form of powders or films.…”

“…We chose to use MgF 2 as the dielectric host due to its high dielectric constant, and Ag as the metal guest due to its well defined surface plasmon resonant (SPR) absorbance peak. [14][15][16][17] The GLACD technique is a combination of co-deposition and glancing angle deposition (GLAD) technique in a physical vapor deposition system. The co-deposition provides a way to evaporate two or more materials simultaneously to form composite or doped materials, and to change the composition of the resulting composite/doped structures by varying the relative ratio of the deposition rates of two or more sources.…”

Quantum efficiency modeling for a thick back-illuminated astronomical CCD

“…Wavelength (nm) [42], DeVore [40], and SOPRA [16]. "NT" indicates "new target," "UT" indicates "used target."…”

Nanocomposite Thin Films Resulting from Au Nanoclusters Dispersed in Titanium Oxide Dielectric Matrixes: the Surface Plasmon Resonance Effect

“…This higher effect of the SPR on the samples annealed at temperatures at 500º C or higher, can be clearly seen on the reflectance ( Figure 9), colour coordinates ( Figure 10) and absorbance ( Figure 11) results. It is important to highlight that TiO 2 films do not show any of these optical changes under the same heat treatment (Dakka et al 2000). Once all the experimental results and the theoretical models are exposed, the reasons of the changes in the optical properties are clarified.…”