scholarly journals Effect of Plasma Treatment on the Sensor Properties of a Light‐Addressable Potentiometric Sensor (LAPS)

2019 ◽  
Vol 216 (20) ◽  
pp. 1900259 ◽  
Author(s):  
Dua Özsoylu ◽  
Sefa Kizildag ◽  
Michael J. Schöning ◽  
Torsten Wagner
Keyword(s):  
Plasma Treatment ◽  
Potentiometric Sensor ◽  
Sensor Properties ◽  
Light Addressable Potentiometric Sensor

Bipolar Light‐Addressable Potentiometric Sensor Based on Fullerene Photosensitive Layer

2021 ◽  
pp. 2001221
Author(s):  
Yun‐Chong Li ◽  
Bo Jiao ◽  
Yi‐Jun Zhang ◽  
Jian Wang ◽  
Wei Ren ◽  
...  
Keyword(s):  
Potentiometric Sensor ◽  
Photosensitive Layer ◽  
Light Addressable Potentiometric Sensor

scholarly journals Constant-phase-mode operation of the light-addressable potentiometric sensor

2009 ◽  
Vol 1 (1) ◽  
pp. 1487-1490 ◽  
Author(s):  
Ko-ichiro Miyamoto ◽  
Torsten Wagner ◽  
Shuhei Mimura ◽  
Shin'ichiro Kanoh ◽  
Tatsuo Yoshinobu ◽  
...  
Keyword(s):  
Potentiometric Sensor ◽  
Mode Operation ◽  
Light Addressable Potentiometric Sensor

Orthogonal Phase Detection Method of Light-addressable Potentiometric Sensor

2020 ◽  
Vol 49 (4) ◽  
pp. 423002-423002
Author(s):  
佟星元 Xing-yuan TONG ◽  
闫晓光 Xiao-guang YAN ◽  
陈东 Dong CHEN
Keyword(s):  
Detection Method ◽  
Potentiometric Sensor ◽  
Phase Detection ◽  
Orthogonal Phase ◽  
Light Addressable Potentiometric Sensor

scholarly journals Modeling of the Return Current in a Light-Addressable Potentiometric Sensor

Sensors ◽  
2019 ◽  
Vol 19 (20) ◽  
pp. 4566
Author(s):  
Tatsuo Yoshinobu ◽  
Daisuke Sato ◽  
Yuanyuan Guo ◽  
Carl Frederik Werner ◽  
Ko-ichiro Miyamoto
Keyword(s):  
Light Beam ◽  
Chemical Sensor ◽  
Series Resistance ◽  
Signal To Noise Ratio ◽  
Modulation Frequency ◽  
Specific Conductivity ◽  
Potentiometric Sensor ◽  
Capacitive Coupling ◽  
Return Current ◽  
Light Addressable Potentiometric Sensor

A light-addressable potentiometric sensor (LAPS) is a chemical sensor with a field-effect structure based on semiconductor. Its response to the analyte concentration is read out in the form of a photocurrent generated by illuminating the semiconductor with a modulated light beam. As stated in its name, a LAPS is capable of spatially resolved measurement using a scanning light beam. Recently, it has been pointed out that a part of the signal current is lost by the return current due to capacitive coupling between the solution and the semiconductor, which may seriously affect the sensor performance such as the signal-to-noise ratio, the spatial resolution, and the sensitivity. In this study, a circuit model for the return current is proposed to study its dependence on various parameters such as the diameter of contact area, the modulation frequency, the specific conductivity of the solution, and the series resistance of the circuit. It is suggested that minimization of the series resistance of the circuit is of utmost importance in order to avoid the influence of the return current. The results of calculation based on this model are compared with experimental results, and its applicability and limitation are discussed.

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