Thermal conductivity of carbon nanotubes and their polymer nanocomposites: A review

We review basic quantum electrodynamics and quantum optics aspects in microstructures that exhibit a gap in the spectrum of the electromagnetic radiation they support, known as photonic crystals. After a brief sketch of the properties of such materials we discuss the behaviour of few-level atoms or collections thereof with transition frequencies inside and in the vicinity of the gap. The discussion is cast in terms of a unified formalism which facilitates the comparison with standard cavity-atom physics.

https://iopscience.iop.org/article/10.1088/0034-4885/63/4/201/pdf

Fundamental quantum optics in structured reservoirs

Thermal conductivity of transparent and flexible polymers containing fillers: A literature review

Dielectric and AC conductivity studies have been carried out for chitosan-based proton-conducting electrolytes Chitosan-phosphoric acid (CP) and chitosan composite (CPS) electrolytes were prepared using the solution cast method In both systems, the frequency dependence of e r , M i and tan δ is non-Debye type The AC conductivity in both electrolytes follows the Jonscher power law Conduction mechanism studies show that the CP sample follows the quantum mechanical tunneling (QMT) model and the CPS electrolyte follows the overlapping large polaron-tunneling (OLPT) model

Electrical behavior of proton-conducting chitosan-phosphoric acid-based electrolytes

The present work critically reviews the scientific and patent literature on low melting bismuth based oxide glass frits in materials for electronics, sensors and related applications such as sealing glasses, solar cells, architectural and automotive glass, the main motivation being to replace lead based materials by environmentally more benign ones. Due to similar glass forming properties of Bi and Pb, Bi based glasses are the closest ‘drop-in’ alternative for lead bearing formulations, and are therefore actually replacing them in many applications, helped also by previous experience with Bi containing materials in thick film technology and component metallisations. The outstanding issues are discussed, e.g. matching the lowest processing temperatures achieved by the classical lead based glasses without sacrificing durability and stability, as well as stability versus chemical reduction. Finally, consideration is also given to special ‘heavy’ glasses (often containing Bi and Pb together) that are ...

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Review of Bi2O3 based glasses for electronics and related applications

The dc electrical conductivity of (100−x)Na2B4O7−xWO3 (x = 5, 15, 20 and 30 mol%) glasses is reported in the temperature range 323–473 K. The density and molar volume for these glasses are consistent with the ionic size, atomic weight and amount of different elements in the glasses. At high temperatures the Mott model of phonon-assisted small polaron hopping between nearest neighbours is consistent with conductivity data, while at intermediate temperatures the Greaves variable-range hopping model is found to be appropriate. The estimated model parameters such as number of ions per unit volume, hopping distance, polaron radius and activation energy are found to be consistent with the formation of localized states in these glasses. The electrical conduction of these glasses is confirmed to be that of non-adiabatic small polaron hopping. (© 2003 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim)

Non-adiabatic small polaron hopping conduction in sodium borate tungstate glasses

Crystallization kinetics of melt-spun Fe83B17 metallic glass

Structural and other physical properties of barium vanadate glasses

Semiconducting oxide glasses of the system Fe2O3–Bi2O3–Na2B4O7 were prepared by a press-quenching method Their DC conductivity was measured in the temperature range of 300–473 K In this temperature range, the DC conductivity increased from 10−9 to 10−5 Scm−1 with increasing Fe2O3 concentration Bi2O3 acted as a reducing agent for redox reaction during glass synthesis and affected the conductivity Mossbauer results revealed that the relative fraction of Fe2+ increases with an increasing Fe2O3 concentration The conduction mechanism was found to obey the non-adiabatic small polaron hopping model, and was mainly due to hopping between Fe-ions in the glasses The small polaron coupling γp was calculated and found to be in the range of 1706–2625 For varying glass compositions, hopping mobility and carrier density were calculated and their values were in the range of 366×10−8–817×10−5 cm2V−1s−1 and 129×1017–504×1018 cm−3 at 400 K, respectively

A. Al-Hajry

Papers

Non-adiabatic small polaron hopping conduction in sodium borate tungstate glasses

Crystallization kinetics of melt-spun Fe83B17 metallic glass

Structural and other physical properties of barium vanadate glasses

Characterization and transport properties of semiconducting Fe2O3–Bi2O3–Na2B4O7 glasses

Temperature-dependant non-catalytic growth of ultraviolet-emitting ZnO nanostructures on silicon substrate by thermal evaporation process