This study investigates the pool boiling heat transfer of water over cylindrical heating tubes for different orientations and surface roughness tubes. First, two a smooth tube, horizontal vertical, were used in chamber. For given flux, coefficient achieved with tube was always higher than that vertical tube. To investigate influence roughness, rough fully outer developed through metal etching p...

The authors report a new, important phenomenon: photo-assisted etching of p-type Si in chlorinecontaining plasmas. This mechanism was discovered in mostly Ar plasmas with a few percent added Cl2, but was found to be even more important in pure Cl2 plasmas. Nearly monoenergetic ion energy distributions (IEDs) were obtained by applying a synchronous dc bias on a “boundary electrode” during the af...

We demonstrate the hybrid integration of a lithium niobate microring resonator with silicon nitride waveguide in vertical configuration to achieve efficient light coupling. The is fabricated on insulator (LNOI) substrate using photolithography assisted chemo-mechanical etching (PLACE). A fused silica cladding layer deposited LNOI ring resonator. further produced by first fabricating trench whil...

OBJECTIVES The aim of this study was to evaluate the (1) bond strength of a etch-and-rinse and self-etching adhesive systems to cavosurface enamel, (2) influence of the previous acid etching with phosphoric acid 35% to the self-etching adhesive application on bond strength values, and (3) analysis of the cavosurface enamel morphology submitted to different types of conditioning, with the use of...

in this paper, we have studied the electrical properties of the randomly distributed metallic (co and fe) nano/ micro wires on silicon substrate. deposition was carried out potentiostatically into the pores of the track-etch polycarbonate membrane spin coated onto the si substrate. spin coated films were irradiated with 150mev ni (+11) ions at a fluence of 8e7 ions/cm2, followed by uv irradiati...

In this work, a deliberate etching-based top-down approach is proposed to fabricate the GaN nanorod (NR) Schottky barrier diode (SBD). As key step during fabrication, impact of wet-etching process on device performance systematically studied. By virtue reduced surface states at sidewall, NR SBD with substantially improved, delivering forward turn-on voltage 0.65 V, current density ∼10 kA/cm2 3 ...

AIMS These were to firstly evaluate the shear bond strength of a composite resin to primary dental enamel treated with a standard adhesive system but with varying phosphoric acid etching times along with a self-etching prime, secondly to analyse the etching patterns using SEM. METHODS Forty primary molars were used. In the first three groups, following acid etching, a layer of Prime & Bond NT...