Topic
Oxygen
About: Oxygen is a research topic. Over the lifetime, 48149 publications have been published within this topic receiving 1113788 citations. The topic is also known as: O & Oxygen.
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167 citations
TL;DR: A device was constructed to record continually the oxygen consumption of a dog and to summate as the oxygen deficit the difference between normal oxygen use and oxygen use during hypotension.
Abstract: A device was constructed to record continually the oxygen consumption of a dog and to summate as the oxygen deficit the difference between normal oxygen use and oxygen use during hypotension. Dogs ...
167 citations
Patent•
29 Mar 2004TL;DR: In this article, a method for depositing a low dielectric constant film using cyclic organosiloxane and N 2 O as an oxidizing gas to a chamber and applying RF power to the gas mixture was proposed.
Abstract: A method for depositing a low dielectric constant film includes providing a gas mixture including a cyclic organosiloxane and N 2 O as an oxidizing gas to a chamber and applying RF power to the gas mixture to deposit a low dielectric constant film. The gas mixture may also include oxygen and/or a linear hydrocarbon. In one aspect, the gas mixture includes N 2 O and oxygen as oxidizing gases, and a ratio of the flow rate of the N 2 O to a total flow rate of the N 2 O and the oxygen is between about 0.1 and about 0.5.
166 citations
TL;DR: In this article, a composite material is presented that contains two indicators incorporated into a single polymer matrix, thus allowing simultaneous determination of oxygen partial pressure and temperature, which is suitable for high-resolution oxygen profiling, and for imaging temperature in the range between 0 and 60°C.
Abstract: A novel kind of composite material is presented that contains two indicators incorporated into a single polymer matrix, thus allowing simultaneous determination of oxygen partial pressure and temperature. The temperature-sensitive dye (ruthenium tris-1,10-phenanthroline) was chosen for its highly temperature-dependent luminescence which is the highest among the RuII polypyridyl complexes. A fluorinated palladium(II) tetraphenylporphyrin served as the oxygen probe. The indicators were incorporated into either poly(styrene-co-acrylonitrile) microparticles (to sense oxygen) or into poly(acrylonitrile) (for temperature sensing, since this polymer is virtually impermeable to oxygen). The luminescence of both dyes can be separated either spectrally (due to different absorption and emission spectra of the indicators) or via luminescence decay time. The material is suitable for temperature-compensated oxygen sensing, for example, in high-resolution oxygen profiling, and for imaging temperature in the range between 0 and 60 °C. This enables one to “see” (rather than to “feel”) temperature in this important range. Simultaneous imaging of pressure and temperature also has been achieved. It enables contactless imaging of the two parameters, for example, in wind tunnels. Due to the use of a biocompatible hydrogel matrix, the material conceivably is suited for biomedical applications.
166 citations
TL;DR: Evidence is provided for a charge transfer–induced diffusion mechanism for O2 molecules adsorbed on a rutile TiO2(110) surface and the O2 hopping rate depended on the number of surface donors (oxygen vacancies), which determines the density of conduction band electrons.
Abstract: Diffusion of oxygen molecules on transition metal oxide surfaces plays a vital role for the understanding of catalysis and photocatalysis on these materials. By means of time-resolved scanning tunneling microscopy, we provide evidence for a charge transfer-induced diffusion mechanism for O2 molecules adsorbed on a rutile TiO2(110) surface. The O2 hopping rate depended on the number of surface donors (oxygen vacancies), which determines the density of conduction band electrons. These results may have implications for the understanding of oxidation processes on metal oxides in general.
166 citations