Thermally stimulated discharge conductivity study of zinc oxide thermoelectrets

Sangawar, Vijaya S.; Golchha, Manisha C.

doi:10.1007/s12034-014-0102-6

Cited by 6 publications

(3 citation statements)

References 13 publications

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“…. The increased absorption near the edge is due to the generation of neutral excitations and/or to the transition of electrons from the valence band to the conduction band that results in a large probability of electronic transitions . The intercept of the extrapolation of the linear portion of the absorption coefficient, α , vs. photon energy, E to zero absorption was determined to obtain the values of the absorption edge, A edge .…”

Section: Resultsmentioning

confidence: 99%

Surface and spectroscopic properties of CdSe/ZnS/PVC nanocomposites

Ahmed

2015

Polymer Composites

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It is valuable to understand the way the wettability is affected by the solid and the liquid surface free energies. For this study, transparent films of CdSe/ZnS/PVC nanocomposites have been prepared and characterized by FTIR and contact angle measurements. Moreover, the presence of polar interactions at the liquid/polymer interfaces, which show a proportionality to the polar components of the liquid surface energy for pure polyvinyl chloride (PVC) and all CdSe/ZnS/PVC nanocomposites, is also studied. By using the surface polarizability hypothesis, there is possibility to obtain the dispersion component of surface‐free energies of pure PVC and also its nanocomposites from the contact angles measurement of only polar liquids. This approximately is coincident with that published data for pure PVC obtained from both polar and nonpolar liquids' contact angles. In addition to this, the absorption spectra and the photoluminescence illustrate clearly the effect of CdSe/ZnS quantum dots on their host matrix. The calculated values of the optical parameters, such as energy gap and Urbach energy, illustrate an inverse proportionality between them. POLYM. COMPOS., 38:749–758, 2017. © 2015 Society of Plastics Engineers

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Section: Resultsmentioning

confidence: 99%

Surface and spectroscopic properties of CdSe/ZnS/PVC nanocomposites

Ahmed

2015

Polymer Composites

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“…By analogy with metals where the deformation potential is proportional to the Fermi energy, it is assumed that the deformation potential of dielectric materials is proportional to the band gap. With E g = 4.05 eV 55 for polystyrene, this leads to U = 1.62 eV. This ensures to obtain the standard order of magnitude of a few eV for the deformation potential 53 .…”

Section: Appendix A: Electron-phonon Collision Frequencymentioning

confidence: 99%

Modeling the electron collision frequency during solid-to-plasma transition of polystyrene ablator for direct-drive inertial confinement fusion applications

Pineau

Chimier

et al. 2020

Physics of Plasmas

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Within the inertial confinement fusion (ICF) framework, the solid-to-plasma transition of the ablator arouses increasingly interest, in particular due to the laser-imprint issue. Phase evolution of the ablator is linked to the evolution of the electron collision frequency which is of crucial importance since it drives electron heating by laser energy absorption, and lattice-ion heating due to collisions between electrons and the lattice-ion system. Thus, an accurate description of electron collisions over the whole temperature range occurring in ICF, starting from a few tens of kelvins (solid state) up to tens of millions of kelvins (plasma state), is necessary. In this work, polystyrene ablator is considered and a model of chemical fragmentation is presented to describe the heated polystyrene evolution. Electron collisions are described by electron-phonon collisions in the solid state, and by electron-ion and electron-neutral collisions in plasma state. An effective electron collision frequency valid over the whole range of temperatures reached in ICF experiments is established and discussed. Thermal conductivity is also deduced from collisions in the plasma state and shows a good agreement with the one evaluated by ab initio calculations.

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“…Typical representatives of electret are shown in Table 1 . Silicon dioxide (SiO 2 ) [ 28 , 29 ], aluminum oxide (Al 2 O 3 ) [ 30 , 31 ], zinc oxide (ZnO) [ 32 , 33 ], and hydroxyapatite (HA) [ 34 , 35 ] are widely used inorganic electret materials, which have the advantage of excellent charge retention ability and high surface charge density. More importantly, good biocompatibility supports their further potential applications in biomedicine [ 10 , 14 ].…”

Section: Introductionmentioning

confidence: 99%

Biomedical Applications of Electrets: Recent Advance and Future Perspectives

Zhang

Zhao

Xie

et al. 2023

JFB

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Recently, electrical stimulation, as a non-pharmacological physical stimulus, has been widely exploited in biomedical and clinical applications due to its ability to significantly enhance cell proliferation and differentiation. As a kind of dielectric material with permanent polarization characteristics, electrets have demonstrated tremendous potential in this field owing to their merits of low cost, stable performance, and excellent biocompatibility. This review provides a comprehensive summary of the recent advances in electrets and their biomedical applications. We first provide a brief introduction to the development of electrets, as well as typical materials and fabrication methods. Subsequently, we systematically describe the recent advances of electrets in biomedical applications, including bone regeneration, wound healing, nerve regeneration, drug delivery, and wearable electronics. Finally, the present challenges and opportunities have also been discussed in this emerging field. This review is anticipated to provide state-of-the-art insights on the electrical stimulation-related applications of electrets.

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Thermally stimulated discharge conductivity study of zinc oxide thermoelectrets

Cited by 6 publications

References 13 publications

Surface and spectroscopic properties of CdSe/ZnS/PVC nanocomposites

Surface and spectroscopic properties of CdSe/ZnS/PVC nanocomposites

Modeling the electron collision frequency during solid-to-plasma transition of polystyrene ablator for direct-drive inertial confinement fusion applications

Biomedical Applications of Electrets: Recent Advance and Future Perspectives

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