Effects of Polyaniline Concentration Change and Doping on pH Sensor Sensitivity

2021 ◽  
Vol 2021 (0) ◽  
pp. IIP2A2-4
Author(s):  
Hiroshi KOBAYASHI ◽  
Hisashi SUGIME ◽  
Suguru NODA ◽  
Shinjiro UMEZU
Keyword(s):  
Ph Sensor ◽  
Concentration Change ◽  
Sensor Sensitivity

scholarly journals ISFET pH-Sensor Sensitivity Extraction Using Conventional MOSFET Simulation Tools

2015 ◽  
Vol 6 (5) ◽  
pp. 346-351 ◽  
Author(s):  
Tarek M. Abdolkader ◽  
◽  
Abdurrahman G. Alahdal ◽  
Ahmed Shaker ◽  
Wael Fikry
Keyword(s):  
Ph Sensor ◽  
Simulation Tools ◽  
Sensor Sensitivity

Post-deposition annealing temperature dependence TiO2-based EGFET pH sensor sensitivity

2016 ◽  
Author(s):  
M. A. Zulkefle ◽  
R. A. Rahman ◽  
K. A. Yusoff ◽  
W. F. H. Abdullah ◽  
M. Rusop ◽  
...  
Keyword(s):  
Temperature Dependence ◽  
Annealing Temperature ◽  
Ph Sensor ◽  
Post Deposition Annealing ◽  
Sensor Sensitivity ◽  
Post Deposition ◽  
Annealing Temperature Dependence

In situ monitoring of the H+ concentration change near an electrode surface through electrolysis using slab optical waveguide pH sensor

2008 ◽  
Vol 10 (9) ◽  
pp. 1351-1354 ◽  
Author(s):  
Hiroki Hotta ◽  
Kazuya Tatsuno ◽  
Yoji Hattori ◽  
Takuya Hashimoto ◽  
Masayuki Uehara ◽  
...  
Keyword(s):  
Optical Waveguide ◽  
Electrode Surface ◽  
Ph Sensor ◽  
In Situ Monitoring ◽  
Concentration Change

Introduction of Digital pH Sensor

2008 ◽  
Vol 62 (9) ◽  
pp. 1127-1130
Author(s):  
Yasuo Watanabe
Keyword(s):  
Ph Sensor

Similarity problems of the theory of unsteady concentration boundary layer

1983 ◽  
Vol 48 (10) ◽  
pp. 2751-2766
Author(s):  
Ondřej Wein ◽  
N. D. Kovalevskaya
Keyword(s):  
Boundary Layer ◽  
Approximate Method ◽  
Steady Flow ◽  
Broad Class ◽  
Concentration Boundary Layer ◽  
Concentration Change ◽  
Concentration Boundary ◽  
Flow Problems

Using a new approximate method, transient course of the local and mean diffusion fluxes following a step concentration change on the wall has been obtained for a broad class of steady flow problems.

scholarly journals Titanium Nitride Thin Film Based Low-Redox-Interference Potentiometric pH Sensing Electrodes

Sensors ◽  
2020 ◽  
Vol 21 (1) ◽  
pp. 42
Author(s):  
Shimrith Paul Shylendra ◽  
Wade Lonsdale ◽  
Magdalena Wajrak ◽  
Mohammad Nur-E-Alam ◽  
Kamal Alameh
Keyword(s):  
Thin Film ◽  
Titanium Nitride ◽  
Orange Juice ◽  
Ph Sensor ◽  
Reference Electrode ◽  
Cost Effective ◽  
Ph Sensing ◽  
Ph Sensors ◽  
Potential Shift ◽  
Double Junction

In this work, a solid-state potentiometric pH sensor is designed by incorporating a thin film of Radio Frequency Magnetron Sputtered (RFMS) Titanium Nitride (TiN) working electrode and a commercial Ag|AgCl|KCl double junction reference electrode. The sensor shows a linear pH slope of −59.1 mV/pH, R2 = 0.9997, a hysteresis as low as 1.2 mV, and drift below 3.9 mV/h. In addition, the redox interference performance of TiN electrodes is compared with that of Iridium Oxide (IrO2) counterparts. Experimental results show −32 mV potential shift (E0 value) in 1 mM ascorbic acid (reducing agent) for TiN electrodes, and this is significantly lower than the −114 mV potential shift of IrO2 electrodes with sub-Nernstian sensitivity. These results are most encouraging and pave the way towards the development of miniaturized, cost-effective, and robust pH sensors for difficult matrices, such as wine and fresh orange juice.

scholarly journals Ex-Vivo Measurement of the pH in Aqueous Humor Samples by a Tapered Fiber-Optic Sensor

Sensors ◽  
2021 ◽  
Vol 21 (15) ◽  
pp. 5075
Author(s):  
Ondřej Podrazký ◽  
Jan Mrázek ◽  
Jana Proboštová ◽  
Soňa Vytykáčová ◽  
Ivan Kašík ◽  
...  
Keyword(s):  
Cataract Surgery ◽  
Aqueous Humor ◽  
Fiber Optic ◽  
Ex Vivo ◽  
Sol Gel ◽  
Ph Sensor ◽  
Fiber Optic Sensor ◽  
Optic Sensor ◽  
Tapered Optical Fiber ◽  
Practical Demonstration

A practical demonstration of pH measurement in real biological samples with an in-house developed fiber-optic pH sensor system is presented. The sensor uses 8-hydroxypyrene-1,3,6-trisulfonate (HPTS) fluorescent dye as the opto-chemical transducer. The dye is immobilized in a hybrid sol-gel matrix at the tip of a tapered optical fiber. We used 405 nm and 450 nm laser diodes for the dye excitation and a photomultiplier tube as a detector. The sensor was used for the measurement of pH in human aqueous humor samples during cataract surgery. Two groups of patients were tested, one underwent conventional phacoemulsification removal of the lens while the other was subjected to femtosecond laser assisted cataract surgery (FLACS). The precision of the measurement was ±0.04 pH units. The average pH of the aqueous humor of patients subjected to FLACS and those subjected to phacoemulsification were 7.24 ± 0.17 and 7.31 ± 0.20 respectively.

Sign in / Sign up

Export Citation Format

Share Document