Silk fabrics modification by sol–gel method

Sol–gel is a very effective method to obtain high purity ceramic and hybrid coatings on a variety of substrates. Thanks to their unique structure and extremely reduced thicknesses, sol–gel coatings can remain adherent and transparent even on flexible substrates such as textiles. Hence, their versatile chemistry can be exploited to impart a variety of properties to fabrics. Here, we evaluated the potential of sol–gel coatings for the functionalization of silk fabrics, and in particular for the preparation of coatings able to simultaneously improve abrasion resistance and attain water-repellency. To this end, tetra-ethyl-ortho-silicate based (TEOS) hybrid coatings were prepared using different Si-alkoxides functionalized with either alkyl chains or fluorinated groups. Abrasion resistance, oil and water contact angle, mechanical properties and water vapor permeability were assessed on treated fabrics to identify the more promising formulations.

Characteristics of Fe2O3/SiO2 Nano-Composites Particles Prepared by a Diffusion Flame with Premixed Precursor

Fe2O3 nano-particles coated with SiO2 are synthesized using H2/O2 co-axial diffusion flame with the state-of-the-art electro-spraying (e-spray) technique at atmospheric condition. Fe(CO)5 and TEOS (tetra-ethyl-ortho-silicate) mixture in liquid phase is injected directly into the center of the flame using the electro-spraying method. The synthesized particle characteristics are analyzed with HRTEM, XRD, SQUID. The core (iron oxide)-shell(silica) structured spherical particles are obtained. Most of the particles synthesized are magemite() regardless of the particles sampling positions inside the flame.

Layout Pattern Density and Oxide Deposition Profile Effects on Dielectrics CMP

ABSTRACTTest mask for characterizing pattern dependent variation of the remaining thickness after chemical-mechanical polishing (CMP) was designed with taking the experimentally obtained interaction distance into consideration. Measured interaction distance was constant independent of pattern variables such as pattern density and pattern shapes between line and area. And systematic exploration regarding pitch effects on remaining nitride thickness in STI (Shallow Trench Isolation) CMP was performed with comparing PETEOS (Plasma Enhanced Tetra Ethyl Ortho Silicate) and HDP (High Density Plasma) oxide. Both measured remaining nitride thickness and expected oxide pattern density from consideration of deposition profile effects showed a good correlation with respect to pitch variation for a constant layout pattern density.

Characteristics of XeCl Excimer-Laser Annealed Insulator

The laser annealing effects on the TEOS (Tetra-Ethyl-Ortho-Silicate) oxide of MOS (AI/TEOS/n+ Silicon ) structures was investigated with different initial oxide conditions, such as breakdown field. The breakdown field increased upto the 170 mJ/cm2 with increasing laser energy density and decreased at 220 mJ/cm2. It is considered that the increase of breakdown field is originated from the restore of strains which exist mainly at the metal/oxide interface.

Characteristics of XeCI Excimer-Laser Annealed Insulator

The laser annealing effects on the TEOS (Tetra-Ethyl-Ortho-Silicate) oxide of MOS (Al/TEOS/n+ Silicon ) structures was investigated with different initial oxide conditions, such as breakdown field. The breakdown field increased upto the 170 mJ/cm2 with increasing laser energy density and decreased at 220 mJ/cm2. It is considered that the increase of breakdown field is originated from the restore of strains which exist mainly at the metal/oxide interface.