Coulomb-blockade effect observed at room temperature in Ge nanocrystalline films deposited by the cluster-beam evaporation technique

2000 ◽  
Vol 76 (4) ◽  
pp. 445-447 ◽  
Author(s):  
Souri Banerjee ◽  
S. Nozaki ◽  
H. Morisaki
Keyword(s):  
Coulomb Blockade ◽  
Room Temperature ◽  
Cluster Beam ◽  
Nanocrystalline Films ◽  
Evaporation Technique

Study of Electrical Properties of Ge-Nanocrystalline Films Deposited by Cluster-Beam Evaporation Technique

1998 ◽  
Vol 536 ◽  
Author(s):  
Souri Banedjee ◽  
H. Ono ◽  
S. Nozaki ◽  
H. Morisaki
Keyword(s):  
Electrical Properties ◽  
Liquid Nitrogen ◽  
Coulomb Blockade ◽  
Room Temperature ◽  
Liquid Nitrogen Temperature ◽  
Cluster Beam ◽  
Nanocrystalline Films ◽  
Current Voltage ◽  
Evaporation Technique

AbstractRoom temperature current-voltage (I-V) characteristics were studied across the thickness of the Ge nanocrystalline films, prepared by the cluster beam evaporation technique. The films thus prepared are deposited either at room temperature (Ge-RT) or at liquid nitrogen temperature (Ge-LNT). Ge-LNT nanofilm is subjected to oxidation while Ge-RT did not get oxidized. Steps were observed in the I-V characteristics of the thin Ge- LNT samples suggesting the Coulomb Blockade effect.

Effect of trytophan as dopant on potassium acid phthalate single crystals

2019 ◽  
Author(s):  
Chem Int
Keyword(s):  
Single Crystals ◽  
Room Temperature ◽  
Visible Region ◽  
X Ray Diffraction ◽  
X Ray ◽  
Slow Evaporation Technique ◽  
Absorption Studies ◽  
Evaporation Technique ◽  
Potassium Acid Phthalate ◽  
Acid Phthalate

Optically transparent single crystals of potassium acid phthalate (KAP, 0.5 g) 0.05 g and 0.1 g (1 and 2 mol %) trytophan were grown in aqueous solution by slow evaporation technique at room temperature. Single crystal X- ray diffraction analysis confirmed the changes in the lattice parameters of the doped crystals. The presence of functional groups in the crystal lattice has been determined qualitatively by FTIR analysis. Optical absorption studies revealed that the doped crystals possess very low absorption in the entire visible region. The dielectric constant has been studied as a function of frequency for the doped crystals. The thermal stability was evaluated by TG-DSC analysis.

scholarly journals Temperature Dependence of Hall Mobility AndCarrier Concentration of pb0.55S0.45 Films

2009 ◽  
Vol 6 (1) ◽  
pp. 129-134
Author(s):  
Baghdad Science Journal
Keyword(s):  
Hall Mobility ◽  
Room Temperature ◽  
Annealing Temperature ◽  
High Vacuum ◽  
Life Time ◽  
Mean Free Path ◽  
Charge Carriers ◽  
Evaporation Technique ◽  
Carrier Life Time ◽  
Type Conduction

Measurements of Hall effect properties at different of annealing temperature have been made on polycrystalline Pb0.55S0.45 films were prepared at room temperature by thermal evaporation technique under high vacuum 4*10-5 torr . The thickness of the film was 2?m .The carrier concentration (n) was observed to decrease with increasing the annealing temperature. The Hall measurements showed that the charge carriers are electrons (i.e n-type conduction). From the observed dependence on the temperature, it is found that the Hall mobility (µH), drift velocity ( d) carrier life time ( ), mean free path (?) were increased with increasing annealing temperature

scholarly journals the photoconductive properties of pbxs1-x films

2006 ◽  
Vol 3 (3) ◽  
pp. 534-539
Author(s):  
Baghdad Science Journal
Keyword(s):  
Room Temperature ◽  
Thermal Evaporation ◽  
Thermal Evaporation Technique ◽  
Quantitative Ratio ◽  
Optical Detector ◽  
Evaporation Technique

Optical detector was manufactured Bashaddam thermal evaporation technique at room temperature under pressure rays studied characteristics of reactive Scout efficiency quantitative ratio of the signal and the ability equivalent to noise

scholarly journals Growth, Optical and Microhardness Studies of 2-Aminothiazole- 3, 5-Dinitrobenzoic Acid Complex

2019 ◽  
Vol 1 (1) ◽  
pp. 42-45
Author(s):  
Tamiloli Devendhiran ◽  
Keerthika Kumarasamy ◽  
Mei–Ching Lin
Keyword(s):  
Room Temperature ◽  
Grown Crystal ◽  
Optical Transmittance ◽  
Dielectric Measurements ◽  
Slow Evaporation ◽  
X Ray Diffraction ◽  
Acid Complex ◽  
X Ray ◽  
Slow Evaporation Technique ◽  
Evaporation Technique

Single crystals of 2-Aminothiazole 3,5-Dinitrobenzoic acid has been synthesized and good quality optical crystals were grown by slow evaporation technique at room temperature. The crystallinity nature of the grown crystal was confirmed from X-ray diffraction technique. An optical transmittance study was also carried out by UV – Vis spectra. FTIR spectra confirm the presence of functional groups in the grown crystal. The dielectric measurements were carried out in the range of 50Hz to 2MHz. The dielectric constant was seen to increase exponentially at lower frequencies. The microhardness studies were carried out using Vickers hardness indenter. Photoluminescence study shows that maximum emission occurs at 435nm.

scholarly journals Effect of Pb dopant On A.C mechanism of ZnS thin films

2019 ◽  
Vol 12 (25) ◽  
pp. 80-88
Author(s):  
Salma M. Shaban
Keyword(s):  
Thin Films ◽  
Room Temperature ◽  
Atomic Weight ◽  
Thickness Effect ◽  
Frequency Effect ◽  
Frequency Range ◽  
Glass Substrates ◽  
Evaporation Technique ◽  
Vacuum Evaporation Technique ◽  
Effect Of Doping

Vacuum evaporation technique was used to prepare pure and doped ZnS:Pb thin films at10% atomic weight of Pb element onto glass substrates at room temperature for 200 nm thickness. Effect of doping on a.c electrical properties such as, a.c conductivity, real, and imaginary parts of dielectric constant within frequency range (10 KHz - 10 MHz) are measured. The frequency dependence of a.c conductivity is matched with correlated barrier hoping especially at higher frequency. Effect of doping on behavior of a.c mechanism within temperature range 298-473 K was studied.

Preparation of Magnetically Soft, Highly-Densified Fe Cluster-Assembled Films by Impact Cluster Deposition

2006 ◽  
Vol 11-12 ◽  
pp. 595-598
Author(s):  
Dong Liang Peng ◽  
K. Sumiyama ◽  
H. Yamada ◽  
Takehiko Hihara ◽  
T. Uchida
Keyword(s):  
Room Temperature ◽  
Magnetic Behavior ◽  
Cluster Beam ◽  
Frequency Range ◽  
Soft Magnetic ◽  
Size Change ◽  
Gas Condensation ◽  
Cluster Deposition ◽  
The Impact ◽  
High Cluster

Highly-densified Fe cluster-assembled films were obtained at room temperature by an energetic cluster deposition. Fe clusters were produced using a plasma-gas-condensation (PGC)-type cluster deposition apparatus with a high cluster productivity. Ionized clusters in a cluster beam were electrically accelerated and directly deposited onto a substrate together with neutral clusters from the same cluster source. By increasing the impact energy of the ionized clusters up to about 1 eV/atom, the obtained cluster-assemblies have packing fractions higher than 0.8 without any serious size change, and result in a soft magnetic behavior up to a frequency range of few hundred MHz.

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