A high-stability Eu-complex has been achieved by coating with a silica glass via a low temperature sol-gel process using deuterated methanol. A three-dimensional glass network protects Eu-complex from free-oxygen and/or water to change the ligand structure. In addition, the chemical bond of deuterated Eu-complex is more stable than that of the conventional Eu-complex. Therefore, we achieved the...

pure and antimony doped sno2 thin films have been prepared by the sol-gel dip coating technique on glass substrate using starting material sncl2.2h2o as a host and sbcl3 as a dopant. our experimental results revealed that, the quality of the coated films on the glass depends on process parameters. the effect of annealing temperature, dipping numbers and the dopant concentration on the structura...

Hydroxyapatite (HA), fluor-hydroxyapatite (FHA) with varying levels of fluoride ion substitution and fluorapatite (FA) were synthesised by the sol-gel method as possible implant coating or bone-grafting materials. Calcium nitrate and triethyl phosphite were used as precursors under an ethanol-water based solution. Different amounts of ammonium fluoride were incorporated for the preparation of t...

BACKGROUND The major hazard to the orthodontic tooth movement is the friction developing at the bracket wire interface. In the past, there have been various attempts to reduce this friction. We believe that coating the commercially available orthodontic wires with nanoparticles can result in a successful reduction of this friction. The objective of this study is to develop a novel method of coa...

In order to improve the stability of high color-purity red phosphors for ultraviolet excitation, we encapsulated an Eu-chelate, Eu(HFA)3(TPPO)2, by sol-gel derived glass networks and studied its thermal stability as well as photoluminescence (PL) characteristics. The PL quantum yield of an encapsulated sample was ten times higher than that without encapsulation after annealing at 160 °C for 2 h...

The mixed oxide Zn1-xMgxO (x=0.01-0.2) were prepared by sol-gel synthesis using metal-organic precursors. Zn1-xMgxO films were grown on glass substrates using sol-gel deep and spin coating. Different thickness of films, annealed at various temperatures, were tried to observe the thickness and temperature effects on structural properties. The surface morphologies of all samples were characterize...

Pb(Zr,Ti)O3 compositions are under investigation for applications that include integrated capacitors, piezoelectric sensors, and actuators. Sol–gel synthesis and spin coating are popular routes to the formation of high quality, dense, crack free, insulating films. However, the electrical properties of the films are often different than those measured for bulk specimens of the same composition. ...

The present research investigated the sol–gel preparation, dielectric and ferroelectric properties of PZT films doped with 5 mol% vanadium oxide. Stable PZTV sols can be readily formed, and homogeneous, micrometer thick and pinhole-free PZTV films were obtained by using spin coating followed with rapid annealing. The X-ray diffraction patterns revealed that no parasitic or secondary phases were...

Introduction. Polybrominated diphenyl ethers (PBDEs) are undoubtedly the most important group of organohalogenated compounds that captures the attention of environmental scientists in recent years. PBDEs are widely used flame retardant additives in polymers and textiles and are present in nearly all of our daily appliances. There are growing evidences that these brominated flame retardants are ...