Optical Low Coherence Reflectometry Based on DFWM in Thin Films for Non-Invasive Studies of Aircraft Composite

2001 ◽  
Author(s):  
Chris M. Lawson
Keyword(s):  
Thin Films ◽  
Low Coherence ◽  
Non Invasive ◽  
Optical Low Coherence Reflectometry

Low Coherence Interferometry for Non-Invasive Semiconductor Monitoring

1993 ◽  
Vol 324 ◽  
Author(s):  
Chris M. Lawson ◽  
Robert R. Michael
Keyword(s):  
Solar Cell ◽  
Manufacturing Processes ◽  
Growth Monitoring ◽  
Low Coherence ◽  
Non Invasive ◽  
Low Coherence Interferometry ◽  
Silicon Growth ◽  
Silicon Thickness ◽  
Efficient Solar Cell ◽  
Optical Low Coherence Reflectometry

AbstractWe report on the first use of optical low coherence reflectometry (OLCR) for Edge Defined Film-Fed Growth (EFG) silicon characterization. This OLCR sensor system has been used to measure horizontal profiles of silicon thickness and flatness to an accuracy of 1.5 Rim with the sensor head positioned 1 cm away from the silicon. The use of this noninvasive sensor for EFG silicon growth monitoring may lead to more efficient solar cell manufacturing processes.

scholarly journals PANI-Based Wearable Electrochemical Sensor for pH Sweat Monitoring

Chemosensors ◽  
2021 ◽  
Vol 9 (7) ◽  
pp. 169
Author(s):  
Francesca Mazzara ◽  
Bernardo Patella ◽  
Chiara D’Agostino ◽  
Maria Giuseppina Bruno ◽  
Sonia Carbone ◽  
...  
Keyword(s):  
Thin Films ◽  
Indium Tin Oxide ◽  
Electrochemical Sensors ◽  
Flexible Substrate ◽  
Sensor Performance ◽  
Non Invasive ◽  
Static Contact ◽  
Sweat Sample ◽  
Constant Potential ◽  
Interference Tests

Nowadays, we are assisting in the exceptional growth in research relating to the development of wearable devices for sweat analysis. Sweat is a biofluid that contains useful health information and allows a non-invasive, continuous and comfortable collection. For this reason, it is an excellent biofluid for the detection of different analytes. In this work, electrochemical sensors based on polyaniline thin films deposited on the flexible substrate polyethylene terephthalate coated with indium tin oxide were studied. Polyaniline thin films were abstained by the potentiostatic deposition technique, applying a potential of +2 V vs. SCE for 90 s. To improve the sensor performance, the electronic substrate was modified with reduced graphene oxide, obtained at a constant potential of −0.8 V vs. SCE for 200 s, and then polyaniline thin films were electrodeposited on top of the as-deposited substrate. All samples were characterized by XRD, SEM, EDS, static contact angle and FT-IR/ATR analysis to correlate the physical-chemical features with the performance of the sensors. The obtained electrodes were tested as pH sensors in the range from 2 to 8, showing good behavior, with a sensitivity of 62.3 mV/pH, very close to a Nernstian response, and a reproducibility of 3.8%. Interference tests, in the presence of competing ions, aimed to verify the selectivity, were also performed. Finally, a real sweat sample was collected, and the sweat pH was quantified with both the proposed sensor and a commercial pH meter, showing an excellent concordance.

Air-turbine driven optical low-coherence reflectometry at 28.6-kHz scan repetition rate

1998 ◽  
Vol 154 (1-3) ◽  
pp. 1-4 ◽  
Author(s):  
J Szydlo ◽  
N Delachenal ◽  
R Gianotti ◽  
R Wälti ◽  
H Bleuler ◽  
...  
Keyword(s):  
Repetition Rate ◽  
Low Coherence ◽  
Air Turbine ◽  
Optical Low Coherence Reflectometry
Sign in / Sign up

Export Citation Format

Share Document