Metal‐Containing Polymers: Cryochemical Synthesis, Structure, and Physicochemical Properties

Трахтенберг, Л. И.; Герасимов, Г. Н.

doi:10.1002/0471695432.ch2

Cited by 7 publications

(4 citation statements)

References 39 publications

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“…Various methods have been reviewed of synthesis and properties of polymer composites for sensor applications (Godovski, 1995;Woehrle, 1996;Pomogailo, et al, 2000;Trakhtenberg & Gerasimov, 2005;Gerasimov & Trakhtenberg, 2007). The polymer matrix prevents aggregation of nanoparticles of metal and metal oxide embedded in the matrix to form composites with high particle concentration.…”

Section: Sensors Based On Polymer Compositementioning

confidence: 99%

“…The polymer matrix prevents aggregation of nanoparticles of metal and metal oxide embedded in the matrix to form composites with high particle concentration. Conductometric sensory properties are included in such systems by the change in the tunneling electron transfer between the nanoperticles under the influence of substances being sensed, penetrating into the composite film from the environment and adsorbed onto the nanoperticles (Godovski, 1995;Trakhtenberg & Gerasimov, 2005). Vorontsov et al (1998) observed sensor response to low hydrogen pressures at ambient temperature in poly-p-xylylene film containing Pd nanocrystals.…”

Section: Sensors Based On Polymer Compositementioning

confidence: 99%

See 1 more Smart Citation

Gas Semiconducting Sensors Based on Metal Oxide Nanocomposites

Трахтенберг¹,

Герасимов²,

Громов³

et al. 2012

JMSR

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This paper reviews the important problems associated with the synthesis of metal-oxide nanocomposites, charge transfer phenomena in these composites, their conductive and sensory properties, modeling of sensory effect and the role on this sensory effect of the electronic structure of the metal oxide. The size of metal particles and temperature significantly influence the efficiency of such systems. However, the electronic interactions between the different components of the nanocomposite films play the dominant role in the exploitation of the properties of such sensory systems. Depending on the chemical nature of the analyzed gas and the electronic structure of the semiconducting metal oxides, such interactions can result in either an increase or a decrease of the sensory effect. Thus, by varying the electronic structure of the metal oxide composite sensors as well as the temperature and size of the metal-oxide nanoparticles, the inherent characteristics of the sensor can be changed and tailored for detection of various gases. Such findings clearly open up new opportunities for development of novel selective sensors.

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Section: Sensors Based On Polymer Compositementioning

confidence: 99%

Section: Sensors Based On Polymer Compositementioning

confidence: 99%

Gas Semiconducting Sensors Based on Metal Oxide Nanocomposites

Трахтенберг¹,

Герасимов²,

Громов³

et al. 2012

JMSR

Self Cite

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“…For example, μ tot increases by 0.013 eV (or ∼150 K) upon increase of R from 5 to 50 nm at 500 K. As the conduction electron concentration near the surface of the nanoparticle is also independent of its radius, the electron transfer between nanoparticles of different radii is negligible. But there are always mutual charging effects in the system of nanoparticles at thermal equilibrium associated with statistical redistribution of additional electrons over the nanoparticles to increase the entropy of the system. − Such entropically driven charging is independent of the surface charges due to oxygen surface adsorbates O – .…”

Section: Resultsmentioning

confidence: 99%

Inhomogeneous Charge Distribution in Semiconductor Nanoparticles

et al. 2015

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The inhomogeneous spatial distribution of charge carriers within semiconductor oxide nanoparticles is investigated by taking into account processes involving the interaction of conduction electrons with oxygen donor vacancies in the bulk and with oxygen adsorbates at the surface. The main characteristics of the semiconductor nanoparticles, such as the surface charge, the distributions of positive and negative charges in the bulk, and the temperature dependence of the concentration of conduction electrons, are determined selfconsistently by taking into account the interaction of all charges in the system under conditions of complete thermodynamic equilibrium. The developed statistical mechanics model allows us to determine the net surface negative charge on oxygen atoms, the spatial distributions of the conduction electrons, the positively charged ionized donors, and the electrical potential inside the nanoparticle as a function of nanoparticle radius and temperature.

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“…[ 138 ] For instance, depending on the metal nature and the polymer structure, the resulted configurations may form as organometallic units incorporated into polymer chains, metal–polymer complexes, metal clusters, or as physically connected nanoparticles to the polymer matrix. [ 139 ] These films are widely applied in such different fields as membrane preparation targets.…”

Section: Polymer Film Compositesmentioning

confidence: 99%

Polyvinyl alcohol‐based membranes for filtration of aqueous solutions: A comprehensive review

Razmgar

Nasiraee

2021

Polymer Engineering & Sci

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This review provides a comprehensive overview on applications, preparation methods, and most notably the performance efficiency of polyvinyl alcohol (PVA)-based membranes for filtration of aqueous environments. Incorporation of PVA into the membrane matrix significantly enhances such characteristics as antifouling and antibacterial properties as well as hydrophilicity and permeability in the water and wastewater filtrations. Contribution of different PVAbased modular membranes for water purification targets via a comparative review on previous researches is the main theme in this work. Alongside with the focused topic, some basic theories and principals of blend and composite polymer films as well as polymer fibers are debated before the main discussions. This review will ultimately facilitate further development of PVA membranes for the future investigations.

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Metal‐Containing Polymers: Cryochemical Synthesis, Structure, and Physicochemical Properties

Cited by 7 publications

References 39 publications

Gas Semiconducting Sensors Based on Metal Oxide Nanocomposites

Gas Semiconducting Sensors Based on Metal Oxide Nanocomposites

Inhomogeneous Charge Distribution in Semiconductor Nanoparticles

Polyvinyl alcohol‐based membranes for filtration of aqueous solutions: A comprehensive review

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