Topic
Vapours
About: Vapours is a research topic. Over the lifetime, 1153 publications have been published within this topic receiving 15022 citations.
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TL;DR: In this paper, it has been shown that the ethanol vapours action at certain drain voltage leads to the introduction of defects in the Si-thin SiO 2 structure, which are a source of electrically active centres.
Abstract: Processes taking place in Si-thin SiO 2 structures (oxide thickness 135 A) after exposure to ethanol vapours have been investigated by measurements of the inversion channel I - V characteristics. It has been established that the changes in the SiSiO 2 structure under the action of ethanol vapours relax with time after their removing and the extent of relaxation depends on the drain voltage duration as well as on the time interval separation of the drain voltage pulses. The I D ( t ) dependence obeys two exponents, reflecting the presence of two different processes (one of them being slower than the other one), characterized with different time constants. They appear to be a unique function of the ethanol vapour reaction with the oxide surface. It has been shown that the ethanol vapours action at certain drain voltage leads to the introduction of defects in the Si-thin SiO 2 structure. The defects are a source of electrically active centres. The total value of these charges originating after the interaction of ethanol vapours with the SiO 2 surface is of the order of (1.5–1.7) × 10 11 cm −2 . It is proposed that the surface oxide charge is mainly responsible for the ethanol vapours-introduced positive charge in the SiSiO 2 structure. The paper proposes some concepts for the interpretation of the results obtained. Adsorption of ethanol molecules, surface reaction and desorption of decomposition products are included.
6 citations
TL;DR: In this article, the results of vapour permeation of acetone and isopropanol through a commercially available "Membralox" membrane with pore diameter of 4nm at three temperature levels: 160, 180 and 200°C.
6 citations
TL;DR: The results of experiments on the heating of hydrogen and nitrogen of high initial pressure (20 -40 MPA) by high-current discharge with discharge current amplitude up to 1,5 MA, initiated by wire explosion, are represented in this paper.
6 citations
TL;DR: Antifungal activities of volatile vapours of essential oils were investigated, finding spores of dermatophytic filamentous fungi are more susceptible to volatile vapour strength than mycelia.
Abstract: Antifungal activities of volatile vapours of essential oils were investigated. Volatile vapours of test essential oils except Cedar-wood and Pachouri showed inhibitory activity against test fungi. Volatile vapours of Birch essential oils exhibited fungistatic activity against dermatophytic filamentous fungi while others did fungicidal activity. Spores of dermatophytic filamentous fungi are more susceptible to volatile vapours of essential oils than mycelia.
6 citations
TL;DR: Absorption of volatile solvent vapours into siloxane polymers is found to follow two distinct mechanisms with different absorption rates that are associated with different excess volumes of mixing and may be accompanied by a polymer restructuring step.
Abstract: The response of polysiloxane materials to volatile organic compounds (VOCs) including benzene, toluene, ethylbenzene, and toluene (BTEX), as well as cyclohexane, acetone, methanol and isopropanol is studied using thin film large-angle refractometry Refractive index and thickness changes are measured to quantify the diffusion rate and partition coefficients associated with the absorption and desorption of VOC vapours into polydimethylsiloxane (PDMS) and polydiphenylsiloxane (PDPS) - PDMS copolymer films Absorption of volatile solvent vapours into siloxane polymers is found to follow two distinct mechanisms with different absorption rates These mechanisms are also associated with different excess volumes of mixing and may be accompanied by a polymer restructuring step
6 citations