Influence of Water Molecules on Properties of Binuclear or Bridged Structures for Chiral CuII-NiII, CuII-PdII, and CuII-PtIITetracyano-Bimetallic Assemblies

The anticipated diagnosis of various fatal diseases from the analysis of volatile organic compounds (VOC) biomarkers of the volatolome is the object of very dynamic research. Nanocomposite-based quantum resistive vapor sensors (vQRS) exhibit strong advantages in the detection of biomarkers, as they can operate at room temperature with low consumption and sub ppm (part per million) sensitivity. However, to meet this application they need to detect some ppm or less amounts of biomarkers in patients' breath, skin, or urine in complex blends of numerous VOC, most of the time hindered by a huge amount of water molecules. Therefore, it is crucial to analyze the effects of moisture on the chemo-resistive sensing behavior of carbon nanotubes based vQRS. We show that in the presence of water molecules, the sensors cannot detect the right amount of VOC molecules present in their environment. These perturbations of the detection mechanism are found to depend on the chemical interactions between water and other VOC molecules, but also on their competitive absorption on sensors receptive sites, located at the nanojunctions of the conductive architecture. This complex phenomenon studied with down to 12.5 ppm of acetone, ethanol, butanone, toluene, and cyclohexane mixed with 100 ppm of water was worth to investigate in the prospect of future developments of devices analysing real breath samples in which water can reach a concentration of 6%.

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The Role of Adsorbed Water Molecules in Bulk Restructuring of Amorphous Tungsten Trioxide Films

MRS Proceedings ◽

10.1557/proc-417-391 ◽

1995 ◽

Vol 417 ◽

Author(s):

I. V. Shiyanovskaya

Keyword(s):

Tungsten Trioxide ◽

Aqueous Electrolyte ◽

Adsorbed Water ◽

High Energy ◽

Water Molecules ◽

High Energy Electron ◽

Film Stability ◽

Influence Of Water ◽

Scanning Electron

AbstractThe influence of water molecules adsorbed at the surface of electrochromic WO3 films on film stability in aqueous electrolyte has been studied by scanning electron microscopy and high energy electron diffraction.

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Domain Structure Reversible Reconstruction of Amorphous Ferromagnetic by Water Molecules Weak Adsorption

Solid State Phenomena ◽

10.4028/www.scientific.net/ssp.152-153.428 ◽

2009 ◽

Vol 152-153 ◽

pp. 428-430 ◽

Cited By ~ 1

Author(s):

V.E. Zubov ◽

A.D. Kudakov ◽

N.L. Levshin ◽

N.A. Mezenkov

Keyword(s):

Domain Wall ◽

Domain Structure ◽

Domain Walls ◽

Sample Surface ◽

Wall Structure ◽

Water Molecules ◽

Wall Width ◽

Influence Of Water ◽

Weak Adsorption ◽

Domain Wall Structure

Influence of water molecules reversible adsorption on domain structure and domain wall structure in amorphous Fe-rich ferromagnet samples is investigated by magnetooptical method. Before investigation the samples were kept in the air. Domain structure of the samples significantly changes in wacuum: instead one 180-degree domain wall several domain walls appear which are oriented with angle 45o to the long side of the sample. This effect is completely reversible. Another new effect is found: domain wall width on the sample surface in vacuum is 35% bigger (13.5 µm) than in atmosphere of water vapor (10 µm).

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Uniaxial Magnetic Anisotropy of Bismuth-Doped Ferrite-Garnet Films, Induced by Weak Adsorption

Solid State Phenomena ◽

10.4028/www.scientific.net/ssp.215.154 ◽

2014 ◽

Vol 215 ◽

pp. 154-157

Author(s):

Victor E. Zubov ◽

Andrey D. Kudakov ◽

Nikolay L. Levshin

Keyword(s):

Magnetic Anisotropy ◽

Faraday Effect ◽

Perpendicular Magnetic Anisotropy ◽

Effective Field ◽

Water Molecules ◽

Uniaxial Magnetic Anisotropy ◽

Garnet Films ◽

Influence Of Water ◽

Weak Adsorption ◽

Iron Garnet

Abstract. With the use of magneto-optical Faraday effect effective field of perpendicular magnetic anisotropy of iron garnet films is measured in vacuum and in the atmosphere of water vapor. It is established that a decrease of the mentioned field takes place due to adsorption of the water molecules by 20% in comparison with the value of field in vacuum. This result is in accordance with the conclusion reached on the base of investigation of influence of water molecules adsorption on domain structure of iron garnet films earlier.

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On the hydrates of codeine phosphate: the remarkable influence of hydrogen bonding on the crystal size

Chemical Communications ◽

10.1039/c4cc01430h ◽

2014 ◽

Vol 50 (53) ◽

pp. 6970-6972 ◽

Cited By ~ 6

Author(s):

Tomče Runčevski ◽

Gjorgji Petruševski ◽

Petre Makreski ◽

Sonja Ugarkovic ◽

Robert E. Dinnebier

Keyword(s):

Hydrogen Bonding ◽

Strong Influence ◽

Crystal Size ◽

Water Molecules ◽

Codeine Phosphate ◽

Size And Shape ◽

Influence Of Water

The strong influence of water molecules on the crystal size and shape of codeine phosphate hydrates is reported.

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Modified fuel to reduce the harmful emissions of an internal combustion engine

MORSKIE INTELLEKTUAL`NYE TEHNOLOGII ◽

10.37220/mit.2021.53.3.011 ◽

2021 ◽

pp. 83-87

Author(s):

И.И. Бочкарева ◽

В.П. Зайцев ◽

О.В. Рослякова

Keyword(s):

Molecular Weight ◽

Diesel Engine ◽

Combustion Chamber ◽

Diesel Fuel ◽

Active Zone ◽

Combustion Engine ◽

Water Molecules ◽

Heating Systems ◽

Harmful Emissions ◽

Influence Of Water

В работе представлены экспериментальные результаты о влиянии воды в топливных системах – в виде водотопливной эмульсии и в растворенном состоянии в дизельном топливе. На основании экспериментальных данных установлено, что одна из причин снижения интенсивности образования оксидов азота является перевод работы дизеля с мазута на водотопливную эмульсию. При использовании эмульсии наблюдается сокращение объема активных зон – мест образования оксидов азота, а также уменьшение максимальных локальных температур газа. Были проведены исследования водотопливных систем, где молекулы воды находятся в растворенном состоянии в виде истинных растворах. Для повышения растворимости воды в дизельном топливе вводили модификаторы различной природы: высокомолекулярный спирт и соль четвертичного аммониевого основания. В результате испытаний, проведенных на двигателе 1Ч15/18, было установлено, что наличие растворенной воды в модифицированном топливе приводит к снижению токсичных компонентов CO и NOx в выхлопных газах. Thos works presents experimental results of influence of water in heating systems – in a form of water-fuel emulsion and in the form of solution in diesel fuel. Based on experimental evidence established that one of the reasons for reducing the intensity of the education nitrogen oxides is the translation work of a diesel engine with vodotoplivnuju oil to emulsify. When using emulsions significantly reduced the volume of an active zone of the combustion chamber, where it is impossible the formation of NOx. Studies have been carried out vodotoplivnyh systems where water molecules are dissolved State as true solutions. To increase the solubility of water in diesel fuel injected modifiers of different nature: high molecular weight alcohols and Quaternary ammonievogo salt Foundation. As a result of tests carried out on the engine 1Ch15/18 it was found that the presence of water dissolved in the modified fuel leads to reduced toxic components CO and NOx in the exhaust.

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Influence of water absorption on mechanical properties and glass transition temperatures of polyamide6/hexagonal boron nitride composites

International Journal of Structural Integrity ◽

10.1108/ijsi-05-2021-0049 ◽

2021 ◽

Vol ahead-of-print (ahead-of-print) ◽

Author(s):

Kawaljit Singh Randhawa ◽

Ashwin Patel

Keyword(s):

Glass Transition ◽

Thermal Properties ◽

Hexagonal Boron Nitride ◽

Water Molecules ◽

Mechanical And Thermal Properties ◽

Transition Temperatures ◽

Glass Transition Temperatures ◽

Content Type ◽

Environmental Humidity ◽

Influence Of Water

PurposeThe absorption of moisture/water can affect the mechanical and thermal properties of polymers and polymer composites as many polymers, mainly polyamide thermoplastics, are sensitive to environmental humidity and can absorb a large amount of moisture. This paper investigates the effect of water molecules' absorption on mechanical and thermal properties of polyamide6/hexagonal boron nitride (PA6/h-BN) composites.Design/methodology/approachThe PA6/h-BN composites were exposed to an open environment and water for 15 days to analyse the effect of humidity/water molecules' absorption on mechanical and thermal properties. The tensile strength, hardness and impact strength of materials were measured and compared. The scanning electron microscopy (SEM), x-ray diffraction (XRD) and differential scanning calorimetry (DSC) analyses were utilized to see the influence of water absorption on microstructure, crystallinity and glass transition temperatures.FindingsAfter exposing materials to an open environment and water, the tensile strength and hardness were found to decline, while improvement in impact strength was noticed. SEM characterization revealed the formation of voids/pockets in water-immersed materials. DSC analysis revealed the loss in glass transition temperatures, and XRD analysis revealed the loss in crystallinity of water-immersed materials.Originality/valueEnvironmental conditions vary according to the geographical areas, and it varies in many countries throughout the year. Polyamides are sensitive to the environmental humidity and can absorb a large amount of moisture from the environment. It becomes necessary to test these materials in their original working conditions, and sometimes it is mandatory to see the effects of extreme environmental conditions on a component. In this article, efforts have been made to investigate the influence of extreme humidity/water conditions on thermo-mechanical properties of PA6/h-BN composites.

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