New approach to measuring oxide charge and mobile ion concentration

1994 ◽  
Author(s):  
Piotr Edelman ◽  
Andrew M. Hoff ◽  
Lubek Jastrzebski ◽  
Jacek J. Lagowski
Keyword(s):  
Ion Concentration ◽  
New Approach ◽  
Oxide Charge ◽  
Mobile Ion Concentration

scholarly journals Mobile Ion Concentration Measurement and Open-Access Band Diagram Simulation Platform for Halide Perovskite Solar Cells

Joule ◽  
2020 ◽  
Vol 4 (1) ◽  
pp. 109-127 ◽  
Author(s):  
Luca Bertoluzzi ◽  
Caleb C. Boyd ◽  
Nicholas Rolston ◽  
Jixian Xu ◽  
Rohit Prasanna ◽  
...  
Keyword(s):  
Solar Cells ◽  
Open Access ◽  
Perovskite Solar Cells ◽  
Concentration Measurement ◽  
Ion Concentration ◽  
Simulation Platform ◽  
Band Diagram ◽  
Halide Perovskite ◽  
Mobile Ion Concentration

Intramolecular force-compensated hydrogel-based sensors with reduced response times

2019 ◽  
Vol 86 (4) ◽  
pp. 227-236 ◽  
Author(s):  
Simon Binder ◽  
Gerald Gerlach
Keyword(s):  
Response Time ◽  
Response Times ◽  
Ion Concentration ◽  
New Approach ◽  
Long Term Stability ◽  
Continuous Sensor ◽  
Successful Reduction ◽  
Force Compensation ◽  
Hysteresis Behaviour

AbstractThe method of intramolecular force compensation forms a new approach for reducing the response time of hydrogel-based chemical sensors and improving their long-term stability. The principle is based on a single bisensitive hydrogel, that fulfills both the function of a sensor and an actuator. This paper presents the measuring principle, the required bisensitive hydrogel and a sensor setup. The results show the desired bisensitivity of the sensor to the temperature and ion concentration as well as the successful reduction of the response time by more than 50 % compared to the conventional deflection method. The continuous sensor operation with the application of varying measuring solvents indicates a negligibly low hysteresis behaviour.

Counterion Effects on Ion Mobility and Mobile Ion Concentration of Doped Polyphosphazene and Polyphosphazene Ionomers

2007 ◽  
Vol 40 (11) ◽  
pp. 3990-3995 ◽  
Author(s):  
Robert J. Klein ◽  
Daniel T. Welna ◽  
Arlin L. Weikel ◽  
Harry R. Allcock ◽  
James Runt
Keyword(s):  
Ion Mobility ◽  
Ion Concentration ◽  
Mobile Ion Concentration

IONIC OSMOTIC EFFECTS INCREASE FLUID FLOW DURING PERMEATION TESTS

2012 ◽  
Vol 12 (04) ◽  
pp. 1250063
Author(s):  
M. D. FARRELL ◽  
P. E. RICHES
Keyword(s):  
Fluid Flow ◽  
Random Sequence ◽  
Fluid Velocity ◽  
Fluid Pressure ◽  
Ion Concentration ◽  
Hypertonic Solution ◽  
Hypotonic Solution ◽  
Pressure Gradients ◽  
Fixed Charges ◽  
Mobile Ion Concentration

Fluid flow is essential for the transport of metabolites to, from and within the intervertebral disc (IVD). By applying quadriphasic mixture theory experimentally, this study relates fluid flow within the bovine nucleus pulposus (NP) to the applied fluid pressure gradients and fixed charge and mobile ion concentration gradients. 24 plugs of NP tissue (diameter 10 mm, height 1020 ± 122 μm (mean ± SD)), orientated in the axial direction, were harvested from bovine tail discs. The plugs were permeated with either; 0 M NaCl , 0.15 M NaCl or 3 M NaCl solutions by subjecting them to 30, 45 and 60 kPa fluid pressure gradients applied in a random sequence. The hypertonic solution was assumed to render all non-fluid pressure gradients negligible, whilst the hypotonic solution was assumed to render the mobile ion concentration gradient negligible. The effects of these gradients on fluid flow were expressed as a percentage of the applied fluid pressure. Fluid velocity was significantly increased through the tissue in the isotonic case compared to the hypertonic case by up to 55% of the applied fluid pressure. The fixed charges accounted for between 26% and 43% and the mobile ion gradient responsible for 12–26% of this increased fluid flow. These results highlight the importance of using a constitutive equation for permeability that includes mobile ions and fixed charges as separate phases when modeling cartilaginous tissue in order to better describe fluid flow, and thus convective transfer of metabolites, within the tissue.

Gate Oxide Damage in Dry Photoresist Stripping Environments

1987 ◽  
Vol 98 ◽  
Author(s):  
Karen H. Sibbett ◽  
J. Ignacio Ulacia ◽  
James P. McVittie ◽  
Richard F. Reichelderfer
Keyword(s):  
Parallel Plate ◽  
Minority Carrier ◽  
Ion Concentration ◽  
Simple Method ◽  
Carrier Lifetimes ◽  
Etch Tunnel ◽  
Minority Carrier Lifetimes ◽  
Effect Of Oxygen ◽  
Barrel Reactor ◽  
Mobile Ion Concentration

ABSTRACTThe effect of oxygen plasma stripping environments on the electrical properties of thin oxides has been studied. A barrel, parallel plate and downstream stripper are compared. Damage, measured by shifts in flatband voltage (Δ Vfb), increases in the density of interface traps (Dit), and degradation in minority carrier lifetimes, was observed in all plasma processed samples. Plasma treated wafers had 10–100 fold increases in Dit but recovered to nearly control levels after a 450 °C anneal. ΔVfb and lifetimes did not recover in all cases. Mobile ion contamination dominated in the high temperature (≥ 250 °C) downstream stripping tool. The mobile ion concentration was halved by decreasing the process temperature in the downstream etcher. Ion bombardment-induced damage appears to be most important in the parallel plate configuration. Lifetime results were poor for wafers etched in an unshielded barrel reactor and did not recover after anneal. Use of an etch tunnel improved results to control levels. Degradation of minority carrier lifetimes measured using the photoconductivity technique correlated well with changes in Vfb and Dit. This measurement provides a simple method for evaluating plasma-induced damage.

scholarly journals A new approach to endocochlear potential and potassium ion concentration measures in mini pig models

2014 ◽  
Vol 9 (4) ◽  
pp. 163-168
Author(s):  
Lili Ren ◽  
Ling Zhang ◽  
Weiwei Guo ◽  
Wei Sun ◽  
Shiming Yang
Keyword(s):  
Endocochlear Potential ◽  
Potassium Ion ◽  
Ion Concentration ◽  
New Approach
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