Results 31 to 40 of about 7,276 (219)

Visible Light Driven Hydrogen Evolution with a Noble Metal Free CuGa$_{2}$In$_{3}$S$_{8}$ Nanoparticle System in Water [PDF]

open access: yes, 2016
CuGa$_{2}$In$_{3}$S$_{8}$ (CGIS) nanoparticles were synthesised by a hot-injection method and rendered water dispersible by modification with the hydrophilic ligand 3-mercaptopropionic acid (MPA).
Kandiel, Tarek A   +2 more
core   +2 more sources

Dual-Surface Modification of AlGaN/GaN HEMTs Using TMAH and Piranha Solutions for Enhancing Current and 1/f-Noise Characteristics

open access: yesIEEE Journal of the Electron Devices Society, 2018
We demonstrated dual-surface modification of GaN/AlGaN/GaN high-electron mobility transistors using tetramethylammonium hydroxide (TMAH) and piranha solutions prior to gate metallization.
M. Siva Pratap Reddy   +3 more
doaj   +1 more source

Controllable arrangement of integrated obstacles in silicon microchannels etched in 25 wt.% TMAX [PDF]

open access: yesHemijska Industrija, 2021
In this paper, fabrication of silicon microchannels with integrated obstacles by using 25 wt.% tetramethylammonium hydroxide (TMAH) aqueous solution at the temperature of 80°C is presented and analysed.
Smiljanić Milče M.   +7 more
doaj   +1 more source

The analysis of European lacquer : optimization of thermochemolysis temperature of natural resins [PDF]

open access: yes, 2016
In order to optimize chromatographic analysis of European lacquer, thermochemolysis temperature was evaluated for the analysis of natural resins. Five main ingredients of lacquer were studied: sandarac, mastic, colophony, Manila copal and Congo copal ...
A Heginbotham   +53 more
core   +2 more sources

Origin and Control of OFF-State Leakage Current in GaN-on-Si Vertical Diodes [PDF]

open access: yes, 2015
Conventional GaN vertical devices, though promising for high-power applications, need expensive GaN substrates. Recently, low-cost GaN-on-Si vertical diodes have been demonstrated for the first time.
Azize, Mohamed   +12 more
core   +1 more source

InGaN Laser Diodes with Etched Facets for Photonic Integrated Circuit Applications

open access: yesMicromachines, 2023
The main objective of this work is to demonstrate and validate the feasibility of fabricating (Al, In) GaN laser diodes with etched facets. The facets are fabricated using a two-step dry and wet etching process: inductively coupled plasma—reactive ion ...
Krzysztof Gibasiewicz   +6 more
doaj   +1 more source

Determination of precise crystallographic directions for mask alignment in wet bulk micromachining for MEMS [PDF]

open access: yes, 2016
In wet bulk micromachining, the etching characteristics are orientation dependent. As a result, prolonged etching of mask openings of any geometric shape on both Si{100} and Si{110} wafers results in a structure defined by the slowest etching planes.
Pal, Prem   +4 more
core   +1 more source

Characterization of humic acids from low-rank coals by 13C-NMR and pyrolysis-methylation. Formation of benzenecarboxylic acid moieties during the coalification process [PDF]

open access: yes, 1994
Instituto de Recursos Naturales y Agrobiologia de Sevilla, C.S.I.C., P.O. Box 1052, 41080-Seville, Spain; E-mail address: delrio@irnase.csic.esHumic acid (HA) fractions isolated from a peat and lignite deposit were studied by CP/MAS 13C-NMR and pyrolysis-
González-Vila, Francisco Javier   +3 more
core   +4 more sources

Effect of tetramethylammonium hydroxide/isopropyl alcohol wet etching on geometry and surface roughness of silicon nanowires fabricated by AFM lithography

open access: yesBeilstein Journal of Nanotechnology, 2016
The optimization of etchant parameters in wet etching plays an important role in the fabrication of semiconductor devices. Wet etching of tetramethylammonium hydroxide (TMAH)/isopropyl alcohol (IPA) on silicon nanowires fabricated by AFM lithography is ...
Siti Noorhaniah Yusoh   +1 more
doaj   +1 more source

Presentations of tetramethylammonium hydroxide dermal exposure and the valuable potential of diphoterine solution in decontamination: a retrospective observational study

open access: yesBMC Pharmacology and Toxicology, 2020
Background Tetramethylammonium hydroxide (TMAH) is a quaternary ammonium compound that is both a base corrosive and a cholinergic agonist, and it is widely used in the photoelectric and semiconductor industries.
Chih-Kang Huang   +6 more
doaj   +1 more source

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