Results 201 to 210 of about 25,996 (264)

AACVD synthesized tungsten oxide-NWs loaded with osmium oxide as a gas sensor array: enhancing detection with PCA and ANNs. [PDF]

RSC Adv
Santos-Betancourt A, Navarrete È, Cossement D, Bittencourt C, Llobet E.   +4 more
europepmc   +1 more source

Coordination Chemistry of Boron Subphthalocyanine With BINOL Derivatives: Unexpected Oxidation to Oxa[4]Helicene and Properties of the Resulting Axially Coordinated Complexes Containing Oxa[4]Helicene and/or BINOL Derivatives

Chemistry – A European Journal, EarlyView.
Treatment of BINOL with a boron subphthalocyanine derivative resulted in the formation of a complex coordinated to an oxa[4]helicene derivative, which is generated via a ring‐closure reaction of BINOL. In contrast, treatment of the monomethyl ether of 1,1′‐bi‐2‐naphthol (BINOL) afforded the expected axially coordinated complex.
Shafikul Islam, Kazuyuki Asahi, Hiroyuki Nishikawa, Daiki Tauchi, Masashi Hasegawa, Ken‐ichi Sugiura   +5 more
wiley   +1 more source

Effect of silver doping on the band gap tuning of tungsten oxide thin films for optoelectronic applications. [PDF]

Heliyon
Arifuzzaman M, Saha T, Podder J, Al-Bin F, Das HN.   +4 more
europepmc   +1 more source

Ultraviolet Light-Induced Surface Changes of Tungsten Oxide in Air: Combined Scanning Transmission Electron Microscopy and X-ray Photoelectron Spectroscopy Analysis. [PDF]

Nanomaterials (Basel)
Nakagawa Y, Shiratsuchi Y, Shibayama T, Takeguchi M.   +3 more
europepmc   +1 more source

Tungsten Oxide Coated Liquid Metal Electrodes via Galvanic Replacement as Heavy Metal Ion Sensors. [PDF]

Sensors (Basel)
Bhagwat S, Hambitzer L, Prediger R, Zhu P, Hamza A, Kilian SK, Kluck S, Pezeshkpour P, Kotz-Helmer F, Rapp BE.   +9 more
europepmc   +1 more source

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Tungsten Oxide Nanowires on Tungsten Substrates

Nano Letters, 2002
A simple method was discovered to prepare tungsten oxide nanowires directly from tungsten metal. The structure and composition of the nanowires were characterized by high resolution tunneling electron microscopy (HRTEM) and energy dispersive X-ray scattering (EDX), respectively.
Gu, G., Zheng, B., Han, W., Roth, S., Liu, J.   +4 more
openaire   +2 more sources

Sequential oxidation and reduction of tungsten/tungsten oxide

Thin Solid Films, 2015
Abstract The reduction of oxide films on the surface of tungsten was studied. The oxide films were created by briefly exposing smooth W foils to oxygen plasma generated using a microwave discharge at 500 W and an oxygen pressure of 40 Pa. Oxidation resulted in the formation of a WO3 film with a thickness of approximately 1700 nm. The oxidised samples
Vesel, Alenka, Mozetič, Miran, Balat-Pichelin, Marianne   +2 more
openaire   +2 more sources

Oxidation of Tungsten

Journal of The Electrochemical Society, 1956
Two oxide layers form during the oxidation of tungsten between 700° and 1000°C. The outer layer is porous, powdery, yellow tungstic oxide, , and the inner layer is a dense, thin, dark‐blue, tightly adherent oxide of uncertain composition. The oxidation reaction follows initially the parabolic rate law, but eventually there is a transition to the linear
Watt W. Webb, John T. Norton, Carl Wagner   +2 more
openaire   +1 more source

Reduction of tungsten oxide to tungsten metal

Metallurgical Transactions B, 1976
Tungsten oxide, WO2.96, was reduced toα-W in hydrogen for various time periods over the temperature range 500°C to 900°C. Intermediate oxides were determined using X-ray diffraction analysis of the semireduced powders. Several dopant conditions were used, to find the effect on oxide structures and reaction kinetics of the usual dopants K, Si and Al ...
Theodore R. Wilken, William R. Morcom, Charles A. Wert, John B. Woodhouse   +3 more
openaire   +1 more source

Chemistry of Tungsten Oxide Bronzes

International Journal of Refractory Metals and Hard Materials, 1995
Abstract Ammonium paratungstate (APT) is the generally accepted starting material in tungsten manufacturing. The dopants, which are responsible for the non-sag properties, are given to some tungsten oxide bronze (TOB)-type compounds which are formed by thermal reductive decomposition of APT.
L. Bartha, A.B. Kiss, T. Szalay
openaire   +1 more source