scholarly journals Low-Temperature DC Carrier Transport in (Fe0.45Co0.45Zr0.10)x(Al2O3)1−xNanocomposites Manufactured by Sputtering in Pure Ar Gas Atmosphere

2015 ◽  
Vol 2015 ◽  
pp. 1-5 ◽  
Author(s):  
Ivan A. Svito ◽  
Alexander K. Fedotov ◽  
Anis Saad ◽  
Momir Milosavljević ◽  
Julia A. Fedotova ◽  
...  
Keyword(s):  
Low Temperature ◽  
Percolation Threshold ◽  
Metallic Nanoparticles ◽  
Carrier Transport ◽  
Vacuum Chamber ◽  
Dc Conductivity ◽  
Temperature Relationship ◽  
Residual Oxygen ◽  
Gas Atmosphere ◽  
Ar Gas

This presented work investigates the structure and temperature relationship/dependence of the DC conductivityσ(T)in the (Fe0.45Co0.45Zr0.10)x(Al2O3)1−xnanocomposites deposited in Ar atmosphere with composition (30<x<100 at.%) and temperature (2<T<300 K). It is shown that VRHσ(T)displayed crossover from Mott-like to Shklovskii-Efros regimes which occurred at temperatures of 100–120 K. It is also noted that the observed shift of the percolation threshold to higher concentrations of metallic fraction can be attributed to the disordering of the metallic nanoparticles due to the incorporation of the residual oxygen in the vacuum chamber during the deposition procedure.

Optical Investigation of 3C-SiC Hetero-Epitaxial Layers Grown by Sublimation Epitaxy under Gas Atmosphere

2014 ◽  
Vol 778-780 ◽  
pp. 243-246
Author(s):  
P. Kwasnicki ◽  
V. Jokubavicius ◽  
J.W. Sun ◽  
H. Peyre ◽  
R. Yakimova ◽  
...  
Keyword(s):  
Low Temperature ◽  
Growth Process ◽  
Epitaxial Layers ◽  
Optical Investigation ◽  
Defect Sites ◽  
Vacuum Atmosphere ◽  
Gas Atmosphere ◽  
Low Temperature Photoluminescence

We investigated three 3C-SiC samples grown on 6H SiC substrate by sublimation epitaxy under gas atmosphere. We focus on the low temperature photoluminescence and Raman measurements to show that compare to a growth process under vacuum atmosphere, the gas atmosphere favor the incorporation of impurities at already existing and/or newly created defect sites.

Electrophysical Properties of Iodine Doped Acetylene/Ethylene Copolymers

1993 ◽  
Vol 328 ◽  
Author(s):  
A. N. Aleshin ◽  
E. G. Guk ◽  
V. A. Marikhin ◽  
L. P. Myasnikova ◽  
D. G. Belov
Keyword(s):  
Thermal Properties ◽  
Charge Carrier ◽  
Carrier Transport ◽  
Room Temperature ◽  
Dc Conductivity ◽  
Charge Carrier Transport ◽  
Electrophysical Properties ◽  
Ethylene Copolymers ◽  
Hopping Mechanism ◽  
A Charge

ABSTRACTA new oxydative-resistant, fusible and processible ethylene/acetylene copolymer has been synthesized. The content of rigid (acetylene) and flexible (ethylene) fragments has been widely varied. The structure of the nascent powders and the films compressed at room temperature have been investigated by SEM and WAXS. DSC has been used for studying the thermal properties. DC conductivity of the iodine doped samples has been measured as a function of temperature. It is shown that the doping leads to arising conductivity in the samples even at 10 Mol % acetylene fragments in copolymer. The conductivity up to 10−3 S/cm is reached for the samples with acetylene fragment concentration about 20 Mol %. It is found that a charge carrier transport in investigated copolymers is caused by doped polyacetylene fragments and described by the hopping Mechanism.

Low-temperature oxidation of carbon monoxide over Bi-metallic nanoparticles incorporated three dimensional silica

2021 ◽  
Vol 244 ◽  
pp. 117955
Author(s):  
Mohamed S. Hamdy ◽  
Badria M. Al-Shehri ◽  
Murad Eissa ◽  
Fahad A. Alharthi ◽  
Abdulaziz Ali Alghamdi ◽  
...  
Keyword(s):  
Carbon Monoxide ◽  
Low Temperature ◽  
Metallic Nanoparticles ◽  
Three Dimensional ◽  
Low Temperature Oxidation ◽  
Temperature Oxidation ◽  
Oxidation Of Carbon Monoxide

scholarly journals Electrical Double Percolation of Polybutadiene/Polyethylene Glycol Blends Loaded with Conducting Polymer Nanofibers

Polymers ◽  
2020 ◽  
Vol 12 (11) ◽  
pp. 2658
Author(s):  
Jun Morita ◽  
Takanori Goto ◽  
Shinji Kanehashi ◽  
Takeshi Shimomura
Keyword(s):  
Polyethylene Glycol ◽  
Critical Exponent ◽  
Percolation Threshold ◽  
Field Effect ◽  
Carrier Transport ◽  
Three Dimensional ◽  
Scanning Force Microscopy ◽  
Three Dimensions ◽  
Dimensional Variable ◽  
Double Percolation

The critical phenomena of double percolation on polybutadiene (PB)/polyethylene glycol (PEG) blends loaded with poly-3-hexylthiophene (P3HT) nanofibers is investigated. P3HT nanofibers are selectively localized in the PB phase of the PB/PEG blend, as observed by scanning force microscopy (SFM). Moreover, double percolation is observed, i.e., the percolation of the PB phase in PB/PEG blends and that of the P3HT nanofibers in the PB phase. The percolation threshold (φcI) and critical exponent (tI) of the percolation of the PB phase in PB/PEG blends are estimated to be 0.57 and 1.3, respectively, indicating that the percolation exhibits two-dimensional properties. For the percolation of P3HT nanofibers in the PB phase, the percolation threshold (φcII) and critical exponent (tII) are estimated to be 0.02 and 1.7, respectively. In this case, the percolation exhibits properties in between two and three dimensions. In addition, we investigated the dimensionality with respect to the carrier transport in the P3HT nanofiber network. From the temperature dependence of the field-effect mobility estimated by field-effect transistor (FET) measurements, the carrier transport was explained by a three-dimensional variable range hopping (VRH) model.

scholarly journals Charge carrier transport in blend of P3HT and ZnO nanoparticles at low temperature studied by µSR

2018 ◽  
Vol 1080 ◽  
pp. 012011 ◽  
Author(s):  
L Safriani ◽  
Risdiana ◽  
Fitrilawati ◽  
M Manawan ◽  
A Bahtiar ◽  
...  
Keyword(s):  
Low Temperature ◽  
Charge Carrier ◽  
Zno Nanoparticles ◽  
Carrier Transport ◽  
Charge Carrier Transport
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