Temperature characteristic of carrier scattering and dark resistivity of semi-insulating GaAs

2021 ◽  
Vol 130 (19) ◽  
pp. 195107
Author(s):  
Liqiang Tian ◽  
Guangcheng Sun ◽  
Dong Jing ◽  
Cong Pan ◽  
Zeen Ran ◽  
...  
Keyword(s):  
Temperature Characteristic ◽  
Carrier Scattering

Charge Carrier Scattering Mechanisms in Thermoelectric PbTe:Sb

2014 ◽  
Vol 59 (7) ◽  
pp. 706-711 ◽  
Author(s):  
D.M. Freik ◽  
◽  
S.I. Mudryi ◽  
I.V. Gorichok ◽  
R.O Dzumedze ◽  
...  
Keyword(s):  
Charge Carrier ◽  
Scattering Mechanisms ◽  
Carrier Scattering ◽  
Charge Carrier Scattering

High Temperature Characteristic in Electrical Breakdown and Electrical Conduction of Epoxy/Boron-nitride Composite

2012 ◽  
Vol 132 (2) ◽  
pp. 142-147
Author(s):  
Yutaka Takenaka ◽  
Muneaki Kurimoto ◽  
Yoshinobu Murakami ◽  
Masayuki Nagao
Keyword(s):  
High Temperature ◽  
Boron Nitride ◽  
Electrical Conduction ◽  
Electrical Breakdown ◽  
Temperature Characteristic

Analysis on High Temperature Characteristic of High Power Semiconductor Laser Array

2020 ◽  
Vol 41 (9) ◽  
pp. 1158-1164
Author(s):  
Bo LI ◽  
◽  
Zhen-fu WANG ◽  
Bo-cang QIU ◽  
Guo-wen YANG ◽  
...  
Keyword(s):  
High Temperature ◽  
Semiconductor Laser ◽  
High Power ◽  
Temperature Characteristic ◽  
Laser Array ◽  
Power Semiconductor

Band-to-band auger recombination and carrier-carrier scattering in power rectifiers

1972 ◽  
Vol 8 (23) ◽  
pp. 580 ◽  
Author(s):  
N.G. Nilsson
Keyword(s):  
Auger Recombination ◽  
Carrier Scattering

scholarly journals Terahertz Photoconductivity Spectra of Electrodeposited Thin Bi Films

Materials ◽  
2021 ◽  
Vol 14 (12) ◽  
pp. 3150
Author(s):  
Ignas Nevinskas ◽  
Zenius Mockus ◽  
Remigijus Juškėnas ◽  
Ričardas Norkus ◽  
Algirdas Selskis ◽  
...  
Keyword(s):  
Spatial Separation ◽  
Thz Radiation ◽  
Electron Dynamics ◽  
Optical Pulses ◽  
Electrolyte Additive ◽  
Spectra Analysis ◽  
Grain Sizes ◽  
Carrier Scattering ◽  
Bismuth Films ◽  
Triton X

Electron dynamics in the polycrystalline bismuth films were investigated by measuring emitted terahertz (THz) radiation pulses after their photoexcitation by tunable wavelength femtosecond duration optical pulses. Bi films were grown on metallic Au, Pt, and Ag substrates by the electrodeposition method with the Triton X-100 electrolyte additive, which allowed us to obtain more uniform films with consistent grain sizes on any substrate. It was shown that THz pulses are generated due to the spatial separation of photoexcited electrons and holes diffusing from the illuminated surface at different rates. The THz photoconductivity spectra analysis has led to a conclusion that the thermalization of more mobile carriers (electrons) is dominated by the carrier–carrier scattering rather than by their interaction with the lattice.

scholarly journals Efficacy of the Method of Four Coefficients to Determine Charge-Carrier Scattering

2021 ◽  
Vol 16 (2) ◽  
Author(s):  
Caitlin M. Crawford ◽  
Erik A. Bensen ◽  
Haley A. Vinton ◽  
Eric S. Toberer
Keyword(s):  
Charge Carrier ◽  
Carrier Scattering ◽  
Charge Carrier Scattering

scholarly journals A Comprehensive Spectroscopic Analysis of the Ibuprofen Binding with Human Serum Albumin, Part II

2021 ◽  
Vol 89 (3) ◽  
pp. 30
Author(s):  
Anna Ploch-Jankowska ◽  
Danuta Pentak ◽  
Jacek E. Nycz
Keyword(s):  
Fatty Acids ◽  
Human Serum Albumin ◽  
Serum Albumin ◽  
Human Serum ◽  
Tertiary Structure ◽  
Temperature Characteristic ◽  
The Body ◽  
Structural Modifications ◽  
Influence Of Temperature On ◽  
Exogenous Substances

Human serum albumin (HSA) is the most abundant human plasma protein. HSA plays a crucial role in many binding endos- and exogenous substances, which affects their pharmacological effect. The innovative aspect of the study is not only the interaction of fatted (HSA) and defatted (dHSA) human serum albumin with ibuprofen (IBU), but the analysis of the influence of temperature on the structural modifications of albumin and the interaction between the drug and proteins from the temperature characteristic of near hypothermia (308 K) to the temperature reflecting inflammation in the body (312 K and 314 K). Ibuprofen is a non-steroidal anti-inflammatory drug. IBU is used to relieve acute pain, inflammation, and fever. To determine ibuprofen’s binding site in the tertiary structure of HSA and dHSA, fluorescence spectroscopy was used. On its basis, the fluorescent emissive spectra of albumin (5 × 10−6 mol/dm3) without and with the presence of ibuprofen (1 × 10−5–1 × 10−4 mol/dm3) was recorded. The IBU-HSA complex’s fluorescence was excited by radiation of wavelengths of λex 275 nm and λex 295 nm. Spectrophotometric spectroscopy allowed for recording the absorbance spectra (zero-order and second derivative absorption spectra) of HSA and dHSA under the influence of ibuprofen (1 × 10−4 mol/dm3). To characterize the changes of albumin structure the presence of IBU, circular dichroism was used. The data obtained show that the presence of fatty acids and human serum albumin temperature influences the strength and type of interaction between serum albumin and drug. Ibuprofen binds more strongly to defatted human serum albumin than to albumin in the presence of fatty acids. Additionally, stronger complexes are formed with increasing temperatures. The competitive binding of ibuprofen and fatty acids to albumin may influence the concentration of free drug fraction and thus its therapeutic effect.

Temperature characteristic analysis of C-SenseFET integrated Feedback-MOS structure

2020 ◽  
Author(s):  
Yishang Zhao ◽  
Zehong Li ◽  
Shanghan Yang ◽  
Zhaofeng Sun ◽  
Yang Yang ◽  
...  
Keyword(s):  
Temperature Characteristic ◽  
Characteristic Analysis ◽  
Mos Structure

scholarly journals TEMPERATURE CHARACTERISTICS FOR PULSATION FREQUENCY IN GONIONEMUS

1928 ◽  
Vol 11 (5) ◽  
pp. 547-562 ◽  
Author(s):  
Ernst Wolf
Keyword(s):  
Critical Temperature ◽  
Functional Unit ◽  
Temperature Characteristic ◽  
Nerve Ring ◽  
Pulsation Frequency ◽  
Sense Organs ◽  
Critical Temperatures ◽  
Temperature Characteristics ◽  
System A ◽  
Definite Temperature

The frequency of contraction of the bell of Gonionemus was studied in relation to temperature, with intact animals and also where different operations were made on the nervous system. A number of values of µ are found for intact animals namely 8,100±, 10,500±, 32,000± and 22,500±, with critical temperatures at 9.6°, 12.3°, and 14.0°. Four different classes of operations were used: (1) Animals where the nerve ring was cut on two opposite sides of the bell; the µ values found are 10,500± and 21,300±, with a critical temperature at 13.4°. (2) Animals with four cuts through the nerve ring gave µ = 10,600 ± and µ = 21,000, with a critical temperature at 13.1°. (3) In animals where the bell was cut in half the temperature characteristic was found to be 16,900. And finally (4) in the animals where the nerve ring was totally removed µ values of 8,100, 16,000±, and 29,000 were found, with critical temperatures at 15.0° and 9.4°. These results are discussed from the standpoint of the theory which supposes that definite "temperature characteristics" may be associated with the functional activity of particular elements in a complex functional unit, and that these elements may be separately studied and identified by suitable experimental procedures involving the magnitudes of the respective temperature characteristics and the locations of associated critical temperatures. The swimming bell of medusæ with its marginal sense organs permits a fairly direct approach to such questions. It is found that even slight injuries to the marginal nerve ring, for example, produce specific modifications in the temperature relations which are different from those appearing when the organism is cut in half.

scholarly journals ON THE MECHANISM OF TONIC IMMOBILITY IN VERTEBRATES

1928 ◽  
Vol 11 (6) ◽  
pp. 715-741 ◽  
Author(s):  
Hudson Hoagland
Keyword(s):  
Tonic Immobility ◽  
Threshold Value ◽  
Temperature Characteristic ◽  
The State ◽  
Rate Of Change ◽  
The Other ◽  
Negative Slope ◽  
Selective Inhibitors ◽  
Initial Stimulus ◽  
Temperature Range

1. The durations of successive periods of induced tonic immobility in the lizard Anolis carolinensis was examined as a function of temperature. An automatic recording method was employed and observations were made of 12,000 to 15,000 immobilizations with six animals over a temperature range of 5° to 35°C. during 5 months. 2. The durations of the immobile periods were found to vary rhythmically in most cases. The reciprocal of the duration of the rhythm, i.e., the rate of change of the process underlying the rhythms, when plotted as a function of temperature according to the Arrhenius equation show distributions of points in two straight line groups. One of these groups or bands of points extends throughout the entire temperature range with a temperature characteristic of approximately µ = 31,000 calories, and the other covers the range of 20° to 35°C. with µ equal to approximately 9,000 calories. 3. The initial stimulus in a series of inductions of immobility appears to set off a mechanism which determines the duration of the state of quiescence. Succeeding forced recoveries seem to have no effect on the normal duration of the rhythm. 4. These results are interpreted by assuming the release, through reflex stimulation, of hormonal substances, one effective between 5° and 35°C. and the other effective between 20° and 35°C. These substances are assumed to act as selective inhibitors of impulses from so called "higher centers," allowing impulses from tonic centers to pass to the muscles. 5. In some experiments a progressive lengthening in successively induced periods of immobility was observed. The logarithm of the frequency of recovery when plotted against time in most of these cases (i.e., except for a few in which irregularities occurred) gave a linear function of negative slope which was substantially unaffected by temperature. In these cases it is assumed that a diffusion process is controlling the amount of available A substance. 6. The results are similar to those obtained by Crozier with Cylisticus convexus. The duration of tonic immobility seems to be maintained in both arthropod and vertebrate by the chemical activity of "hormonal" selective inhibitors. The details of the mechanisms differ, but there is basic similarity. 7. Injections of small amounts of adrenalin above a threshold value are found to prolong the durations of tonic immobility of Anolis, by an amount which is a logarithmic function of the "dose." It is possible that internally secreted adrenalin, above a threshold amount, may be involved in the maintenance of tonic immobility. 8. The production of tonic immobility reflexly is a problem distinct from that of the duration of immobility. It is suggested that the onset may be induced by "shock" to the centers of reflex tonus causing promiscuous discharge of these centers with accompanying inhibition of the higher centers. Such a condition may result when an animal is suddenly lifted from the substratum and overturned, or when, as in the case of Anolis, it struggles with dorsum down. This reaction of the "tonic centers" may at the same time lead to discharge of the adrenal glands by way of their spinal connections thus prolonging the state.

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