منابع مشابه
Synthesis of Fe-doped CeO2 Nanoparticles Prepared by Solgel Method
Nanomaterials have achieved remarkable technological advances in bulk materials due to their excellent physical, chemical and biological properties. cerium oxide (CeO2) nanostructured doped with Fe ions is attractive due to improvement in redox properties, transport property and surface-to-volume ratio. In this research, Fe-doped CeO2 nanoparticles (NPs) were prepared by s...
متن کاملOn the angular dependence of focused laser ablation by nanosecond pulses in solgel and polymer materials
Focused laser ablation by single laser pulses at varying angles of incidence is studied in two materials of interest: a solgel ~Ormocer 4! and a polymer ~SU8!. For a range of angles ~up to 70° from normal!, and for low-energy ~,20 mJ!, 40 ns pulses at 266 nm wavelength, the ablation depth along the direction of the incident laser beam is found to be independent of the angle of incidence. This a...
متن کاملUltralow-threshold Yb(3+):SiO(2) glass laser fabricated by the solgel process.
A Yb-doped silica microcavity laser on a silicon chip is fabricated from a solgel thin film. The high-Q micro-toroid cavity, which has a finesse of 10,000, is evanescently coupled to an optical fiber taper. We report a threshold of 1.8 microW absorbed power that is, to the best of our knowledge, the lowest published threshold to date for any Yb-doped laser. The effect of Yb(3+) concentration on...
متن کاملSelective-area doping of porous solgel films for integrated optics.
A technique for doping of porous films by surface adsorption of ions from aqueous solution is demonstrated. Fabrication of the films by use of the solgel technique gives a nanometer-scale porosity, which provides high doping levels and homogeneity. Doping through a masking layer patterned by photolithography is thus possible. With Pb as a dopant, lead silicate films with refractive indices of 1...
متن کاملCOMPARATIVE STUDY ON PROPERTIES OF NANOSTRUCTURED TITANIA SYNTHESIZED BY COLLOIDAL AND POLYMERIC SOLGEL ROUTES
Abstract:Nanostructured titania was synthesized by colloidal and polymeric sol-gel routes. Stable colloidal and polymeric titania sols were prepared by adjusting the proper values of the acid/alkoxide and the water/alkoxide molar ratios. The properties of sols were determined by dynamic light scattering technique and synthesized titania was characterized by thermogravimetry and differential the...
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ژورنال
عنوان ژورنال: Active and Passive Electronic Components
سال: 1995
ISSN: 0882-7516,1563-5031
DOI: 10.1155/1995/32178