Recently, piezoelectric transducer has been used for generation and detection of ultrasound. in medical ultrasound equipment and ultrasound non-destructive inspection equipment. In our laboratory, we fabricated a piezoelectric transducer with PZT poly-crystalline film deposited on the titanium substrate by a hydrothermal synthesis method which is one of crystal growth technology. Fabrication of...

Porous polyurethane foam was evaluated to replace the eight nylon meshes used as a substrate to collect nanoparticles in the Nanoparticle Respiratory Deposition (NRD) sampler. Cylindrical (25-mm diameter by 40-mm deep) foam with 110 pores per inch was housed in a 25-mm-diameter conductive polypropylene cassette cowl compatible with the NRD sampler. Pristine foam and nylon meshes were evaluated ...

In this article, using finite element analysis (FEA) and an X-ray diffractometer (XRD), cold-sprayed titanium particles on a steel substrate is investigated in term of cooling time and the development of residual strains. Three cooling-down models of sprayed particles after deposition stage are simulated and discussed: the first model (m1) considers conduction effect to the substrate only, the ...

Photocatalytic degradation of chemical pollutants in water was investigated using semiconductor oxide catalysts, zinc oxide (ZnO) and titanium dioxide (TiO2) and phenol as the substrate. Influence of various parameters such as characteristics of the catalyst, irradiation time, substrate and catalyst concentrations, pH etc. has been studied and optimum conditions for the complete degradation of ...

The physical vapor deposition process of serial bideposition is adapted to the fabrication of uniaxial optical coatings. During the coating process the vapor impinges at an angle of incidence of about 70 on to the substrate, and a stepwise axial rotation with 90 increments causes a columnar structure to grow normal to the substrate. Symmetry considerations that follow from the choice of 90 for ...

Micro power sources are required to be used in autonomous microelectromechanical system (MEMS). In this paper, we designed and fabricated a three dimensional (3D) MEMS supercapacitor, which is consisting of conformal silicon dioxide/titanium/polypyrrole (PPy) layers on silicon substrate. At first, through-structure was fabricated on the silicon substrate by high-aspect-ratio deep reactive ion e...

Titanium dioxide was applied as an immobilized photocatalyst in a microstructured falling film reactor for the continuous-flow C–H arylation of heteroarenes with aryldiazonium salts as the starting material. Detailed investigations of the catalyst and a successful long-term run proved its excellent usability for this process. Very good yields up to 99% were achieved with broad substrate scope a...

This work elucidates the optoelectronic properties of graphene/methylammonium lead iodide (MAPbI3)/titanium dioxide (TiO2)/porous Si heterostructure diodes. The porous silicon substrates can accommodate more MAPbI3/TiO2 than the polished silicon substrate such that the MAPbI3/TiO2/porous Si substrate heterostructures have better optoelectronic properties. Photocurrents from 300 to 900 nm were m...

1. Easy to plate: steel, copper and brass. These can be coat* with adherent deposits that will riot fail at the deposit-substrate interface. 2. Special treatment: stainless steels, aluminum, beryllium, magnesium and plastics. These can also be coated with adherent deposits that will not fail at the deposit-substrate interface. 3. Very difsicult: titanium, molybdenum, tungsten, niobium, tantalum...

The indentation of a brittle film on a ductile substrate is analysed for obtaining the interface toughness. This measurement method of adhesion provides a simple technique for sampling a small area of the interface on practical geometries with common laboratory equipment. Mechanics solutions are presented to access the interface toughness, Fc, from measurements of the applied load, delamination...