A novel device fabricated with Cu2NiSnS4chalcogenide: Morphological and temperature-dependent electrical characterizations

2020 ◽  
Vol 20 (1) ◽  
pp. 58-64 ◽  
Author(s):  
Abdulkerim Karabulut ◽  
Adem Sarilmaz ◽  
Faruk Ozel ◽  
İkram Orak ◽  
Mehmet Akif Şahinkaya
Keyword(s):  
Temperature Dependent ◽  
Novel Device ◽  
Electrical Characterizations

scholarly journals Photocurrent response of B12As2 crystals to blue light, and its temperature- dependent electrical characterizations

AIP Advances ◽  
2016 ◽  
Vol 6 (2) ◽  
pp. 025206
Author(s):  
R. Gul ◽  
Y. Cui ◽  
A. E. Bolotnikov ◽  
G. S. Camarda ◽  
S. U. Egarievwe ◽  
...  
Keyword(s):  
Blue Light ◽  
Photocurrent Response ◽  
Temperature Dependent ◽  
Electrical Characterizations

SYNTHESIS AND CHARACTERIZATION OF PURE AND Zn-DOPED SnO2 NANOPOWDERS

2013 ◽  
Vol 22 ◽  
pp. 452-457 ◽  
Author(s):  
PARUL GUPTA ◽  
RISHI VYAS ◽  
B. L. CHOUDHARY ◽  
K. SACHDEV ◽  
D. S. PATIL ◽  
...  
Keyword(s):  
Gas Sensing ◽  
Sol Gel ◽  
Average Crystallite Size ◽  
X Ray Diffraction ◽  
Temperature Dependent ◽  
Sensing Applications ◽  
Zn Addition ◽  
Vis Spectroscopy ◽  
Electrical Characterizations

Pure and 4.5 wt% Zn- doped SnO2 nanopowders were synthesized by sol-gel method. These nanopowders were characterized by X- ray diffraction, Scanning electron microscopy, UV-Vis spectroscopy, I-V measurements and R-T measurements. XRD results confirmed the formation of tetragonal rutile type SnO2 with the average crystallite size of 14 ± 1 nm which decreased to 9 ± 1 nm with 4.5 wt% Zn addition. Increase in band gap is observed from UV-Vis spectroscopy. Electrical characterizations revealed increase in resistivity with Zn addition. Temperature dependent resistance measurement showed that both the pure and the Zn- doped samples are suitable for gas sensing applications. A detailed study of these synthesized nanostructured samples is presented and discussed in the paper.

scholarly journals Effect of The Nickel And Temperature Dependent Electrical Properties C-SiO2 -Ni Composites

2021 ◽  
Author(s):  
S. Gouadria ◽  
K. Omri
Keyword(s):  
Small Polaron ◽  
Sol Gel ◽  
Inert Atmosphere ◽  
Metallic Nickel ◽  
Temperature Dependent ◽  
Conduction Model ◽  
Main Band ◽  
Resorcinol Formaldehyde ◽  
Characteristic Lines ◽  
Electrical Characterizations

Abstract The sol-gel method was chosen to synthesize C-SiO2/Ni nanocomposites, silica nanofillers were incorporated into a carbon based on resorcinol-formaldehyde (RF), doped with 5% nickel. During preparation process, they were subjected to a heat treatment of different pyrolysis temperatures and under an inert atmosphere for 2 h. The X- ray diffractogram presented by XRD of the samples treated at low temperatures, indicates the presence of characteristic lines of metallic nickel. FTIR analysis shows the presence of a main band located at about 1050 cm-1, which corresponds to the vibrations of Si-O-Si. From electrical characterizations, the C-SiO2-Ni5%-650 sample has a negative differential resistance‎ behavior (NDR) at low measurement temperatures. According to the I-V characterization, the C-SiO2-Ni5%-625 °C nanocomposite reveals the NDR behavior at room temperature. The conduction mechanism was fitted by two models: the hopping conduction model for the nanocomposite, treated at 650 °C, and the small polaron model for the composite treated at 675 °C.

(111) Monocrystalline Nickel Films

1972 ◽  
Vol 30 ◽  
pp. 512-513
Author(s):  
T.E. Pratt ◽  
R.W. Vook
Keyword(s):  
Film Thickness ◽  
Deposition Rate ◽  
Room Temperature ◽  
Narrow Range ◽  
High Vacuum ◽  
Residual Pressure ◽  
Temperature Dependent ◽  
Deposition Parameters ◽  
Transmission Electron ◽  
Substrate Temperatures

(111) oriented thin monocrystalline Ni films have been prepared by vacuum evaporation and examined by transmission electron microscopy and electron diffraction. In high vacuum, at room temperature, a layer of NaCl was first evaporated onto a freshly air-cleaved muscovite substrate clamped to a copper block with attached heater and thermocouple. Then, at various substrate temperatures, with other parameters held within a narrow range, Ni was evaporated from a tungsten filament. It had been shown previously that similar procedures would yield monocrystalline films of CU, Ag, and Au.For the films examined with respect to temperature dependent effects, typical deposition parameters were: Ni film thickness, 500-800 A; Ni deposition rate, 10 A/sec.; residual pressure, 10-6 torr; NaCl film thickness, 250 A; and NaCl deposition rate, 10 A/sec. Some additional evaporations involved higher deposition rates and lower film thicknesses.Monocrystalline films were obtained with substrate temperatures above 500° C. Below 450° C, the films were polycrystalline with a strong (111) preferred orientation.

In Vitro Effects of Urokinase — Prevention by Different Inhibitors

1990 ◽  
Vol 64 (03) ◽  
pp. 402-406 ◽  
Author(s):  
M D Oethinger ◽  
E Seifried
Keyword(s):  
In Vitro Study ◽  
Thrombin Time ◽  
Plasma Samples ◽  
Temperature Dependent ◽  
Chloromethyl Ketone ◽  
Control Value ◽  
Dose Time ◽  
In Vitro Effects ◽  
Full Protection

SummaryThe present in vitro study investigated dose-, time- and temperature-dependent effects of two-chain urokinase plasminogen activato(u-PA, urokinase) on normal citrated plasma. When 10 μg/ml u-PA wereadded to pooled normal plasma and incubated for 30 min at an ambient temperature (25° C), α2-antiplas-min decreased to 8% of the control value. Incubation on ice yielded a decrease to 45% of control,whereas α2-antiplasmin was fully consumed at 37° C. Fibrinogen and plasminogen fell to 46% and 39%, respectively, after a 30 min incubation at 25° C. Thrombin time prolonged to 190% of control.Various inhibitors were studied with respect to their suitability and efficacy to prevent these in vitro effects. Aprotinin exhibited a good protective effect on fibrinogen at concentrations exceeding 500 KlU/ml plasma. Its use, however, was limited due to interferences with some haemostatic assays. We could demonstrate that L-Glutamyl-L-Glycyl-L-Arginyl chloromethyl ketone (GGACK) and a specific polyclonal anti-u-PA-antibody (anti-u-PA-IgG) effectively inhibited urokinase-induced plasmin generation without interfering with haemostatic assays. The anti-u-PA-antibody afforded full protection ofα2-antiplasmin at therapeutic levels of u-PA.It is concluded that u-PA in plasma samples from patients during thrombolytic therapy may induce in vitro effects which should be prevented by the use of a suitable inhibitor such as GGACK or specific anti-u-PA-antibody.

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