Sol Gel – Page 3 – TechConnect Briefs

Sol-gel Synthesis of Ferrite Foam Materials for H2 Generation from Water-Splitting Reaction

Bhosale R., Shende R., Puszynski J., South Dakota School of Mines & Technology, US

Ferrites in the form of spinel, doped spinel, and wustite are used for H2 generation from thermochemical water-splitting reaction. Although these ferrites have been synthesized by solid-state mixing, self-propagation high temperature synthesis and aerosol-spray pyrolysis [...]

Preparation of Y3Al5O12:Eu3+ waveguide films by sol-gel method

García Hernández M., García-Murillo A., de J. Carrillo Romo F., Torres Orozco C., García Hernández M., García-Murillo A., Ramírez-Meneses E., Cicata - IPN Unidad Altamira, MX

In this work, Y3Al5O12:Eu3+ (5 mol% Eu3+) optical thick films were obtained by sol-gel process. The films were dip-coated by dip-coating technique. The synthesis was accomplished using metal organic precursors, such as Al(tri-sec-butoxide) Al(OC4H9)3, yttrium [...]

Preparation and applications of transition metal oxide nanofibres and nanolines

Tätte T., Paalo M., Part M., Kisand V., Lõhmus A., Kink I., University of Tartu, EE

Recently many nanoscale silica structures have been suggested for optics device design. For example silica nanoneedles are used for focusing light into spot some tens of nanometers in diameter and sub-wavelength diameter silica fibres are [...]

Synthesis and Characterization of Nanocrystalline Eu3+-doped Gd2O3

Jáuregui-Rosas S., Tomar M., Jia W., Vásquez O., Fachini E., University of Puerto Rico, Mayaguez Campus, PR

Nanocrystalline Gd2-xEuxO3 phosphors by a simple sol-gel method have been synthesized. The effects of the annealing temperature and atomic fraction of Eu3+ ions (x) on the structural and luminescence properties of the mixed oxides have [...]

Evaluation of Antibacterial Activities of Zinc Oxide-Titanium Dioxide Nanocomposites Prepared by Sol-Gel Method

Chang H., Leung H., Nanyang Polytechnic, SG

Antibacterial activity of ceramic powders has attracted attention as a new technique that can substitute for conventional methods using organic agents. Ceramic powders of zinc oxide (ZnO), calcium oxide (CaO) and magnesium oxide (MgO) were [...]

Biphenyl-functionalized Ethane-silica Hybrid Materials with Ordered Hexagonal Mesoporous Structure

Virtudazo R., Magdaluyo Jr E., dela Cruz L., Castriciones E., Mendoza H., University of the Philippines, PH

A biphenyl-containing hybrid organic-inorganic mesoporous materials have been synthesized and characteized. The synthesis was done via surfactant-templated polymerization of 4,4’-bis(triethoxysilyl)biphenyl and 1,2-bis(triethoxysilyl)ethane under basic condition. The composition, structure and morphology of the mesoporous materials were [...]

Structure of Ni nanoparticles/TiO2 films prepared by sol-gel dip-coating

García-Murillo A., Ramírez-Meneses E., Ramírez-Salgado J., Sandoval-Robles B.G., Montiel-Palma V., Dorantes-Rosales H., Del Angel-Vicente P., Cicata - IPN Unidad Altamira, MX

Titania thin films were synthesized by sol-gel dip-coating method with metallic Ni nanoparticles from an organometallic precursor. Titania matrix and Ni nanoparticles were prepared separately. Titania precursor solution was prepared mixing titanium isopropoxide in isopropanol [...]

Structural and Magneto-Optical Properties of Co-doped ZnO Thin Films Prepared by Sol-Gel Method

Neamtu J., Teodorescu C., Georgescu G., Ferré J., Malaeru T., Jitaru I., National Institute for Research&Development in Electrical Engineering, RO

Co doped ZnO thin film has promising potential for spintronic devices. Theoretical calculations predict ferromagnetism for Diluted Magnetic Semiconductors (DMS): ZnO doped with transition metals (Fe,Co,Ni). We have investigated Co (x=0.05-0.30) doped ZnO (Zn1-xCoxO), films [...]

Nanostructuration of sol-gel thin films

Peroz C., Goletto V., Foresti M., Heitz C., Le Gratiet L., Barthel E., Sondergard E., Laboratoire mixte CNRS/Saint-Gobain, FR

Sol-gel chemistry is very versatile and structuring sol-gel materials will allow a fine tuning of chemistry, electromagnetic, optical and mechanical properties. We explore the possibilities to combine sol-gel chemistry to large scale patterning at low [...]

Low-Temperature Synthesis and Characterization of Fe-Doped ZnO Nanocrystals

Parra-Palomino A., Singhal R., Perales-Perez O., Tomar M.S., University of Puerto Rico, PR

We present here our results on synthesis and characterization of bare and Fe-doped ZnO nanocrystals by a modified sol-gel method, which does not require annealing of the samples. Metal acetate solutions in 2-ethylhexanoic acid were [...]