Alkaline electrolyzers are the most widespread technology due to their maturity, low cost, and large capacity in generating hydrogen. However, compared proton exchange membrane (PEM) electrolyzers, they request use of potassium hydroxide (KOH) or sodium (NaOH) since electrolyte relies on a liquid solution. For this reason, performances alkaline governed by concentration operating temperature. D...

Abstract Wet anisotropic etching is extensively employed in silicon bulk micromachining to fabricate microstructures for various applications the field of microelectromechanical systems (MEMS). In addition, it most widely used surface texturing minimize reflectance light improve efficiency crystalline solar cells. wet micromachining, etch rate a major factor that affects throughput. Slower incr...

We investigate the interfaces and polarity domains at atomic scale in epitaxial AlN GaN/AlN grown by hot-wall metal organic chemical vapor epitaxy on carbon face of SiC. X-ray diffraction, potassium hydroxide (KOH) wet etching, scanning transmission electron microscopy combined provide an in-depth understanding evolution with film thickness, which is crucial to optimize growth. The a 3D mode fo...

The synthesis of titanate nanostructures from low-cost mineral precursors is a topic continuous interest, considering not only their fundamental aspects but also the benefits incorporating such nanomaterials in wide variety applications. In this work, iron-rich nanosheets were synthesized Ecuadorian ilmenite sands (ilmenite–hematite solid solution-IHSS) through an alkaline hydrothermal treatmen...

Activated carbon was produced from Cocos nucifera (coconut) fibers by carbonization and activation processes. The sample first pretreated before processes at 450°C 700°C respectively in an electric furnace. Chemical using Potassium hydroxide (KOH) 4:1 (weight basis) carried out to increase the activated adsorption properties. element contained analyzed Energy Dispersive Spectroscopy (EDS) while...

Si-doped InN layer by molecular beam epitaxy was subjected to anodic oxidation in 0.1 M potassium hydroxide KOH electrolyte and characterized by electrochemical methods to derive carrier profile at the InN surface. The obtained results were compared to the characteristics of a planar resistor structure and vertical metal-oxide-semiconductor MOS diodes with Ni-metal contacts on the oxidized InN....

Biodiesel is a promising sector worldwide and experiencing significant rapid growth. Several studies have been undertaken to utilize homogeneous base catalysts in the form of KOH develop biodiesel order establish commercially viable sustainable industry. This research centers around extracting potassium hydroxide (KOH) from banana trunks employing it transesterification reaction generate waste ...

BACKGROUND Microscopy of a potassium hydroxide preparation of skin scrapings or nail clippings, although widely advocated as a test for dermatomycosis, is used in only a small proportion of cases. AIM This study set out to investigate the effect of potassium hydroxide testing on the subjectively assessed probability that a dermatomycosis was present. METHOD The study was undertaken in 1992 ...

In this paper, a single-mask substrate transfer process for the fabrication of high-aspect-ratio (HAR) suspended structures is presented. The HAR silicon structures are fabricated using a deep reactive ion etching (DRIE) technique and then transferred to a glass wafer using silicon/thin film/glass anodic bonding and silicon thinning techniques. The HAR structures are released using self-aligned...

The agar diffusion assay was used to examine the effect of pH on the ability of alkaline salts of 3 fatty acids (FA) to inhibit growth of bacteria associated with poultry processing. FA solutions were prepared by dissolving 0.5 M concentrations of caprylic, capric, or lauric acid in separate aliquots of 1.0 M potassium hydroxide (KOH). Citric acid was added to the FA-KOH mixtures to reduce the ...