We report the fabrication and characterization of a photonic crystal fiber (PCF) having a sol-gel core doped with ionic copper. Optical measurements demonstrate that the ionic copper is preserved in the silica glass all along the preparation steps up to fiber drawing. The photoluminescence results clearly show that such an ionic copper-doped fiber constitutes a potential candidate for UV-C (200...

in this work firstly zno nanoparticles were synthesized via a simple precipitation method. at the second step titanium dioxide and silicon dioxide shell were synthesized on the core. for preparation zno-tio2-sio2 the sol product was calcinated at 500 ºc for 2h. properties of the product were examined by x-raydiffraction pattern (xrd), scanning electron microscope (sem) and fourier transform inf...

The research here described presents an investigation over the efficiency of nanostructured TiO2 films as photocatalysts either in air purification systems or to be integrated in light devices, based on the exploitation of UV or Vis irradiation to induce the degradation of hazardous chemical compounds. Gas pollutants (NO) and dyes (rhodamine B) will be considered as model reactants. Several oxi...

Sample-pretreatment is of great interest for micro-total-analysis-system due to the needs of relevant sample concentration and separation techniques for efficient detection. In this study, we demonstrated a novel 3-dimensional sol-gel matrix based microdevice that can process a large volume of the sample and capture target cells with magnetic nanoparticles (MNPs)-mediated colorimetric signal. T...

Hydroxyapatite (HAP) ceramics belongs to a class of calcium phosphate-based biomaterial, which has been widely used as bone substitute for long time. In recent years, synthetic HAP has assumed substantial interest and importance due to its chemical similarity with the natural Ca phosphate mineral present in a biological hard tissue. Considering the wide applications of calcium phosphate compoun...

Tunable Diode Laser Absorption Tomography (TDLAT) is a non-intrusive measurement technique for determining two-dimensional spatially resolved distributions of temperature and species concentration in high enthalpy flows. TDLAT combines infrared laser absorption spectroscopy with tomographic image reconstruction. The TDLAT technique has been implemented at the University of Virginia's Aerospace ...

UV patternable high refractive index inorganic–organic hybrid materials prepared by sol–gel process can be nanoimprinted in order to get photonic crystal nanopatterns. Non-hydrolytic sol–gel process can make a UV curable and relatively high refractive index hybrid material, which can be cured without a significant shrinkage for nanoimprinting. Sol–gel process of heterogeneously functionalized s...

The magnetic properties of copper ferrite (CuFe2O4) nanoparticles prepared via sol-gel auto combustion and facile solvothermal method are studied focusing on the effect of nanoparticle arrangement. Randomly oriented CuFe2O4 nanoparticles (NP) are obtained from the sol-gel auto combustion method, while the solvothermal method allows us to prepare iso-oriented uniform spherical ensembles of CuFe2...

The objective of this research was to investigate how the photocatalytic activity pure TiO2 can be improved by SnO2 modification. Different molar ratios tin titanium were prepared. correlation between concentration and structural properties investigated explain mechanism efficiency optimize synthesis conditions obtain enhanced SnO2-modified photocatalysts under UV-irradiation. prepared a low-te...