Electrical conductivity measurements in evaporated tin sulphide thin films

1994 ◽  
Vol 76 (5) ◽  
pp. 917-922 ◽  
Author(s):  
K. DERAMAN ◽  
S. SAKRANI ◽  
B. B. ISMATL ◽  
Y. WAHAB ◽  
R. D. GOULD
Keyword(s):  
Thin Films ◽  
Electrical Conductivity ◽  
Conductivity Measurements

Structure and Conductivity of Iodine-Doped C60 Thin Films

1994 ◽  
Vol 359 ◽  
Author(s):  
Jun Chen ◽  
Haiyan Zhang ◽  
Baoqiong Chen ◽  
Shaoqi Peng ◽  
Ning Ke ◽  
...  
Keyword(s):  
Thin Films ◽  
Electrical Conductivity ◽  
Room Temperature ◽  
Conductivity Measurements ◽  
X Ray Diffraction ◽  
Temperature Conductivity ◽  
Room Temperature Conductivity ◽  
X Ray ◽  
Thermally Activated ◽  
Order Of Magnitude

ABSTRACTWe report here the results of our study on the properties of iodine-doped C60 thin films by IR and optical absorption, X-ray diffraction, and electrical conductivity measurements. The results show that there is no apparent structural change in the iodine-doped samples at room temperature in comparison with that of the undoped films. However, in the electrical conductivity measurements, an increase of more that one order of magnitude in the room temperature conductivity has been observed in the iodine-doped samples. In addition, while the conductivity of the undoped films shows thermally activated temperature dependence, the conductivity of the iodine-doped films was found to be constant over a fairly wide temperature range (from 20°C to 70°C) exhibiting a metallic feature.

Transport Properties of Polyelectrolyte Solutions. Effect of Confinement in Thin Liquid Films

2015 ◽  
Vol 229 (7-8) ◽  
Author(s):  
Jérôme Delacotte ◽  
Dominique Langevin
Keyword(s):  
Thin Films ◽  
Electrical Conductivity ◽  
Transport Properties ◽  
Liquid Films ◽  
Thin Liquid Films ◽  
Conductivity Measurements ◽  
Polyelectrolyte Solutions

AbstractThe role of condensed counterions in transport properties, such as electrical conductivity and viscosity, has been investigated with solutions of a flexible polyelectrolyte. Comparisons with existing theories are proposed. Viscosity is strongly affected by confinement in thin films, depending whether polyelectrolyte chains are adsorbed or not at the film surfaces. The role of counterion mobility is however difficult to assess because the measurements are not accurate enough. It is proposed that this role could be tested by electrical conductivity measurements.

scholarly journals Preparation and Characterization ofSb2Te3Thin Films by Coevaporation

2010 ◽  
Vol 2010 ◽  
pp. 1-4 ◽  
Author(s):  
Bin Lv ◽  
Songbai Hu ◽  
Wei Li ◽  
Xia Di ◽  
Lianghuan Feng ◽  
...  
Keyword(s):  
Thin Films ◽  
Electrical Conductivity ◽  
Photoelectron Spectroscopy ◽  
Electrical Transport ◽  
Film Surface ◽  
Soda Lime ◽  
Soda Lime Glass ◽  
Conductivity Measurements ◽  
X Ray ◽  
Thin Film Surface

Deposition ofSb2Te3thin films on soda-lime glass substrates by coevaporation of Sb and Te is described in this paper.Sb2Te3thin films were characterized by x-ray diffraction (XRD), x-ray fluorescence (XRF), atomic force microscopy (AFM), x-ray photoelectron spectroscopy (XPS), electrical conductivity measurements, and Hall measurements. The abnormal electrical transport behavior occurred fromin situelectrical conductivity measurements. The results indicate that as-grownSb2Te3thin films are amorphous and undergo an amorphous-crystalline transition after annealing, and the posttreatment can effectively promote the formation of Sb-Te bond and prevent oxidation of thin film surface.

scholarly journals The application of semi-conductivity measurements in the study of catalysis on copper oxide

1949 ◽  
Vol 197 (1050) ◽  
pp. 314-320 ◽  
Keyword(s):  
Thin Films ◽  
Electrical Conductivity ◽  
Copper Oxide ◽  
Cupric Oxide ◽  
Oxide System ◽  
Conductivity Measurements ◽  
Conductivity Of Thin Films

An apparatus has been constructed to measure the electrical conductivity of thin films of oxides in order to study the effects of adsorbed gases and reactions between them. This has been applied to the cuprous-cupric oxide system.

Domain Size Determination in Diamond Thin Films

1989 ◽  
Vol 162 ◽  
Author(s):  
Y. M. LeGrice ◽  
R. J. Nemanich ◽  
J. T. Glass ◽  
Y. H. Lee ◽  
R. A Rudder ◽  
...  
Keyword(s):  
Thin Films ◽  
Electrical Conductivity ◽  
Residual Stress ◽  
Phonon Dispersion ◽  
Domain Size ◽  
Size Determination ◽  
Conductivity Measurements ◽  
Phonon Dispersion Curves ◽  
Diamond Peak ◽  
Microscopy Techniques

ABSTRACTIn this study we develop a method which utilizes the linewidth of the diamond peak at 1332 cm−1 to determine the diamond domain sizes. We have carried out calculations based on the phonon dispersion curves of diamond and the breakdown of wavevector selection rules in Raman scattering. The linewidths of a series of diamond samples were calculated, and from this theory the dimensions of the diamond regions were obtained. The calculated domain sizes ranged from 57 to 100Å and were compared to values obtained from SEM micrographs which were between 5000 and 25000Å. This is consistent with other results which have found that domain sizes calculated from this theory are in general consistent with sizes determined from electrical conductivity measurements, not from microscopy techniques. In addition, this theory allows for the calculation of the amount of frequency shift due to microcrystallinity, so that the residual stress in the film can be found.

scholarly journals Analysis of variance on thickness and electrical conductivity measurements of carbon nanotube thin films

2016 ◽  
Vol 27 (9) ◽  
pp. 095004 ◽  
Author(s):  
Min-Yang Li ◽  
Mingchia Yang ◽  
Emily Vargas ◽  
Kyle Neff ◽  
Arda Vanli ◽  
...  
Keyword(s):  
Thin Films ◽  
Electrical Conductivity ◽  
Carbon Nanotube ◽  
Analysis Of Variance ◽  
Conductivity Measurements

Chemical Vapor Deposition of Conformal Alumina Thin Films

1999 ◽  
Vol 606 ◽  
Author(s):  
Bradley D. Fahlman ◽  
Andrew R. Barron
Keyword(s):  
Thin Films ◽  
Electrical Conductivity ◽  
Chemical Vapor Deposition ◽  
Carbon Fibers ◽  
Vapor Deposition ◽  
Atmospheric Pressure ◽  
Chemical Vapor ◽  
Conductivity Measurements ◽  
Pressure Chemical ◽  
Hydrolysis Of

AbstractDeposition of highly conformal alumina thin films has been carried out by hydrolysis of the liquid alane precursor, AlH3(NMe2Et). Deposition onto Si wafers, quartz and carbon fibers were all carried out utilizing a hot-wall atmospheric pressure chemical vapor deposition (APCVD) system, while deposition onto ceramic particles was accomplished in a simple fluidized-bed APCVD reactor. Films were characterized by SEM, microprobe and electrical conductivity measurements. Growth rates were on the order of 40 - 80 Å.min−1 at 165 °C. The conformality of the films was illustrated using silicon wafers that were etched prior to deposition.

scholarly journals Synthesis and 3D Printing of Conducting Alginate–Polypyrrole Ionomers

Gels ◽  
2020 ◽  
Vol 6 (2) ◽  
pp. 13 ◽  
Author(s):  
Cassandra J. Wright ◽  
Binbin Zhang Molino ◽  
Johnson H. Y. Chung ◽  
Jonathan T. Pannell ◽  
Melissa Kuester ◽  
...  
Keyword(s):  
Thin Films ◽  
Electrical Conductivity ◽  
Tissue Engineering ◽  
Phase Separation ◽  
Ir Spectroscopy ◽  
Large Scale ◽  
Polymerization Reaction ◽  
Conductivity Measurements ◽  
Tissue Engineering Scaffolds ◽  
Extrusion Printing

Hydrogels composed of calcium cross-linked alginate are under investigation as bioinks for tissue engineering scaffolds due to their variable viscoelasticity, biocompatibility, and erodibility. Here, pyrrole was oxidatively polymerized in the presence of sodium alginate solutions to form ionomeric composites of various compositions. The IR spectroscopy shows that mild base is required to prevent the oxidant from attacking the alginate during the polymerization reaction. The resulting composites were isolated as dried thin films or cross-linked hydrogels and aerogels. The products were characterized by elemental analysis to determine polypyrrole incorporation, electrical conductivity measurements, and by SEM to determine changes in morphology or large-scale phase separation. Polypyrrole incorporation of up to twice the alginate (monomer versus monomer) provided materials amenable to 3D extrusion printing. The PC12 neuronal cells adhered and proliferated on the composites, demonstrating their biocompatibility and potential for tissue engineering applications.

Macromolecular structures of biological specimens are not obscured by controlled osmium impregnation

1983 ◽  
Vol 41 ◽  
pp. 606-607
Author(s):  
Klaus-Ruediger Peters ◽  
Samuel A. Green
Keyword(s):  
Thin Films ◽  
Electrical Conductivity ◽  
Critical Point ◽  
Metal Films ◽  
High Magnification ◽  
Osmium Impregnation ◽  
Instrumental Resolution ◽  
20 Nm ◽  
Continuous Metal

High magnification imaging of macromolecules on metal coated biological specimens is limited only by wet preparation procedures since recently obtained instrumental resolution allows visualization of topographic structures as smal l as 1-2 nm. Details of such dimensions may be visualized if continuous metal films with a thickness of 2 nm or less are applied. Such thin films give sufficient contrast in TEM as well as in SEM (SE-I image mode). The requisite increase in electrical conductivity for SEM of biological specimens is achieved through the use of ligand mediated wet osmiuum impregnation of the specimen before critical point (CP) drying. A commonly used ligand is thiocarbohvdrazide (TCH), first introduced to TEM for en block staining of lipids and glvcomacromolecules with osmium black. Now TCH is also used for SEM. However, after ligand mediated osinification nonspecific osmium black precipitates were often found obscuring surface details with large diffuse aggregates or with dense particular deposits, 2-20 nm in size. Thus, only low magnification work was considered possible after TCH appl ication.

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