Holistic Characterization of Carbon Nanotube Membrane for Capacitive Deionization Electrodes Application

2015 ◽  
Vol 1752 ◽  
pp. 125-130 ◽  
Author(s):  
Yamila M. Omar ◽  
Carlo Maragliano ◽  
Chia-Yun Lai ◽  
Francesco Lo Iacono ◽  
Nicolas Bologna ◽  
...  
Keyword(s):  
Thin Film ◽  
Material Characterization ◽  
Capacitive Deionization ◽  
Carbon Nanostructure ◽  
Rate Dependent ◽  
Wide Range ◽  
Materials Used ◽  
Multiwall Carbon ◽  
Mechanical Surface

ABSTRACTOne of the main areas of improvement in capacitive deionization technologies is the materials used for electrodes which have very specific requirements. In the present work, a wide range of material characterization techniques are employed to determine the suitability of a multiwall carbon nanostructure thin film as electrode material. The electrical, mechanical, surface and wetting characteristics are studied proving the membrane highly conductive (σ=7.25 103 S/m), having competitive electro-sorption capacity (11.7 F/g at 10 mV/s) and surface area (149 m2/g), strain rate dependent mechanical properties and hydrophobic wetting behavior.

Current Chemistry: Characterization of Thin-Film Surfaces and Interfaces Using Neutron Reflectometry

2001 ◽  
Vol 54 (8) ◽  
pp. 487 ◽  
Author(s):  
Michael James
Keyword(s):  
Thin Film ◽  
Data Analysis ◽  
Experimental Design ◽  
Extreme Environments ◽  
Neutron Reflectometry ◽  
Buried Interfaces ◽  
Surfaces And Interfaces ◽  
Wide Range ◽  
Non Destructive

Neutron reflectometry has become an increasingly important technique in the characterization of thin-film surfaces and interfaces. Recent advances in instrumentation, experimental design, sample environments and methods of data analysis now make it possible to obtain an angstrom-precision depth profile of the film composition. Neutrons are non-destructive and highly penetrating which makes them ideal probes for the study of buried interfaces as well as surfaces under a wide range of extreme environments. Isotopic H/D substitution (particularly in colloidal, polymeric or biological systems) provides a unique tool for selectively labelling different components of complex planar architectures. The fundamental aspects of neutron reflectometry are discussed, and the utility of this technique is illustrated by a review of several recent studies.

SQUID NDE Apparatus and Magnetic Calibration to Detect Degradation in Duplex Stainless Steel

1992 ◽  
Vol 114 (1) ◽  
pp. 41-45 ◽  
Author(s):  
S. Evanson ◽  
M. Otaka ◽  
K. Hasegawa
Keyword(s):  
Magnetic Material ◽  
Stainless Steel ◽  
Magnetic Permeability ◽  
Material Characterization ◽  
Residual Magnetization ◽  
Duplex Steel ◽  
Wide Range ◽  
Remote Measurements ◽  
Steel Grades

We report on apparatus for the magnetic material characterization of a wide range of steel grades of high and low magnetic permeability. The instrument has been used to detect thermal aging in Duplex steel by the measurement of the residual magnetization (Br) of test specimens. A method to estimate the value of Br by remote measurements up to 200 mm from a specimen is described. The results are compared with data from conventional hysteresis loop measurements.

scholarly journals Overview of ion chromatographic applications for the analysis of nuclear materials: Case studies

2021 ◽  
Vol 40 (1) ◽  
pp. 204-219
Author(s):  
Harshala Parab ◽  
Jayshree Ramkumar ◽  
Ayushi Dudwadkar ◽  
Sangita D. Kumar
Keyword(s):  
Dynamic Range ◽  
Simultaneous Detection ◽  
Nuclear Industry ◽  
Nuclear Materials ◽  
Analytical Monitoring ◽  
Wide Range ◽  
Anions And Cations ◽  
Materials Used ◽  
Control Rods

Abstract Accurate, precise, and rapid analytical monitoring of various nuclear materials is essential for the smooth functioning of nuclear reactors. Ion chromatography (IC) has emerged as an effective analytical tool for simultaneous detection of different ions in a wide range of materials used in the nuclear industry. The major advantages over other techniques include superior selectivity and sensitivity for detection of anions and cations, wide dynamic range, and speciation studies of ions. This article provides an overview of different ion chromatographic methodologies developed for the analyses of various nuclear materials such as fuel, control rods, moderator, coolant, and process streams. Comparison of various analytical aspects of IC over the other routine techniques reveals the ease and multidimensional capability of the technique. An insight is given to the modern variations in the field such as coupling of IC with other techniques for the characterization of nuclear matrices, implementation of capillary IC in terms of miniaturization, and so on. The information presented herein will serve as a very useful resource for investigators in the field of characterization of nuclear materials.

scholarly journals Long-Term Cathodoluminescent Characterization of Thin-Film Oxide Phosphors in a Wide Range of Electron Excitation Densities

2001 ◽  
Vol 667 ◽  
Author(s):  
Vyacheslav D. Bondar ◽  
Thomas E. Felter ◽  
Charles E. Hunt ◽  
Yuri G. Dubov ◽  
Andrei G. Chakhovskoi
Keyword(s):  
Thin Film ◽  
Electron Excitation ◽  
Beam Irradiation ◽  
Specific Behavior ◽  
Wide Range ◽  
Time Dependencies ◽  
Current Densities ◽  
Power Densities

ABSTRACTLong-term processes of cathodoluminescence degradation of thin film phosphors Zn2SiO4:Ti and Zn2GeO4:Mn were investigated in a wide range of e-beam energies, current and power densities. The time dependencies describing the decreasing of emission intensity have been found. At higher current densities of e-beam irradiation, the specific behavior of long-term degradation processes was observed, which is characterized by rapid initial degradation and a slower long term decrease. The most probable mechanisms are proposed for long-term processes of degradation in the investigated phosphors.

New frontiers in infrared microspectroscopy

1992 ◽  
Vol 50 (2) ◽  
pp. 1522-1523
Author(s):  
M. A. Harthcock ◽  
M. L. McKelvy ◽  
R. J. Pell
Keyword(s):  
Spatial Resolution ◽  
Material Characterization ◽  
Functional Group ◽  
Analysis Techniques ◽  
Infrared Microspectroscopy ◽  
System Composition ◽  
Wide Range ◽  
Common Technique ◽  
Experimental Technology

Infrared microspectroscopy has become a common technique for the microanalysis of material. Characterization of spatially specific areas using infrared spectroscopy has been applied to a wide range of materials/systems including, for example, multi-layer films, silicon wafer contamination and inclusions in a variety of systems, surface contamination, orientation in single fibers. In addition, infrared microspectroscopy mapping experiments have been used to obtain images of materials based on functional group absorptions that characterize system composition.The spatial resolution of the technique is limited to approximately 10-20 micrometers experimentally, due to diffraction limitations. Infrared ultra-microspectroscopy has been mentioned by Messerschmidt as a technique to achieve resolution below the diffraction limit of the radiation (e.g. 5 micrometers). However, in the absence of experimental technology to routinely increase the spatial resolution from which unique infrared spectra can be obtained, we have applied factor analysis techniques to effectively increase the spatial resolution from which an infrared spectrum could be obtained.

Si-based photodiode and material characterization of TiO2 thin film

2021 ◽  
Vol 53 (5) ◽  
Author(s):  
Hüseyin Kaan Kaplan ◽  
Ali Olkun ◽  
Sertan Kemal Akay ◽  
Suat Pat
Keyword(s):  
Thin Film ◽  
Material Characterization ◽  
Tio2 Thin Film

Optimal Design of Biaxial Tests for Structural Material Characterization of Flat Tissues

1996 ◽  
Vol 118 (1) ◽  
pp. 41-47 ◽  
Author(s):  
Y. Lanir ◽  
O. Lichtenstein ◽  
O. Imanuel
Keyword(s):  
Optimal Design ◽  
Material Characterization ◽  
Structural Model ◽  
Optimal Designs ◽  
Model Parameters ◽  
Optimal Sampling ◽  
Material Symmetry ◽  
Wide Range ◽  
Biaxial Tests

A rational methodology is developed for optimal design of biaxial stretch tests intended for estimating material parameters of flat tissues. It is applied to a structural model with a variety of constitutive equations and test protocols, and for a wide range of parameter levels. The results show nearly identical optimal designs under all circumstances. Optimality is obtained with two uniaxial stretch tests at mutually normal directions inclined by 22.5 deg to the axes of material symmetry. Protocols which include additional equibiaxial tests provide superior estimation with lower variance of estimates. Tests performed at angles 0, 45, and 90 deg to the axes of material symmetry provide unreliable estimates. The optimal sampling is variable and depends on the protocols and model parameters. In conclusion, the results indicate that biaxial tests can be improved over presently common procedures and show that this conclusion applies for a variety of circumstances.

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