Differential pH-sensitive sensor with DC electrode-offset compensation

被引：4

作者：

Lee, K. H. ^{[1
]}

Lee, D. ^{[1
]}

Yoon, J. ^{[1
]}

Kwon, O. ^{[1
]}

Lee, J. ^{[2
]}

机构：

[1] Korea Inst Machinery & Mat, Daegu Res Ctr Med Devices & Rehab Engn, Daegu 42994, South Korea

[2] Korea Inst Machinery & Mat, Nanomech Syst, Daejeon 34103, South Korea

来源：

ELECTRONICS LETTERS | 2017年 / 53卷 / 04期

关键词：

pH measurement; compensation; electrochemical electrodes; electrochemical sensors; charge measurement; instrumentation amplifiers; oscillators; readout electronics; differential pH-sensitive sensor; DC electrode-offset compensation; surface charge detection; ion-sensitive layer; instrumentation amplifier; digital readout voltage; current-starved ring; current-starved ring oscillator; hydrogen ion concentration; gain; 22; 5; dB; ISFET;

D O I：

10.1049/el.2016.3330

中图分类号：

TM [电工技术]; TN [电子技术、通信技术];

学科分类号：

0808 ; 0809 ;

摘要：

A pH-sensitive sensor with a differential mode was developed to detect surface charges accumulated on the ion-sensitive layer. The device accurately monitors the relative pH value using the modified instrumentation amplifier with the DC electrode-offset compensation. The readout voltage is digitalised with the current-starved ring oscillator. The sensor achieves the DC offset compensation of 22.5 dB and the oscillating pH sensitivity of 1.3 MHz/pH. The feasibility of the sensor is demonstrated to monitor the hydrogen ion concentration comparing the oscillation frequency at differential mode with that at single mode.

引用

页码：251 / 253

页数：2

共 50 条

[21] A Miniaturized Carbon Dioxide Gas Sensor Based on Sensing of pH-Sensitive Hydrogel Swelling with a Pressure Sensor
S. Herber
J. Bomer
W. Olthuis
P. Bergveld
A. van den Berg
Biomedical Microdevices, 2005, 7 : 197 - 204
[22] A miniaturized carbon dioxide gas sensor based on sensing of pH-sensitive hydrogel swelling with a pressure sensor
Herber, S
Bomer, J
Olthuis, W
Bergveld, P
van den Berg, A
BIOMEDICAL MICRODEVICES, 2005, 7 (03) : 197 - 204
[23] pH-Sensitive CLC Channel Provides a Novel Charge Compensation Pathway for Phagocyte NADPH Oxidase
Wang, X.
Gaurav, R.
Agrawal, D. K.
JOURNAL OF ALLERGY AND CLINICAL IMMUNOLOGY, 2011, 127 (02) : AB166 - AB166
[24] A pH-sensitive fluorescent protein sensor to follow the pathway of calcium phosphate nanoparticles into cells
Kollenda, Sebastian
Kopp, Mathis
Wens, Jasmin
Koch, Johannes
Schulze, Nina
Papadopoulos, Chrisovalantis
Poehler, Robert
Meyer, Hemmo
Epple, Matthias
ACTA BIOMATERIALIA, 2020, 111 : 406 - 417
[25] A ratiometric fluorescence sensor with broad dynamic range based on two pH-sensitive fluorophores
Niu, CG
Gui, XQ
Zeng, GM
Yuan, XZ
ANALYST, 2005, 130 (11) : 1551 - 1556
[26] FABRICATION OF POTENTIOMETRIC ENZYME SENSORS BASED ON A PH-SENSITIVE POLYMER-COATED AG ELECTRODE
ANZAI, J
SHIMADA, M
FU, H
OSA, T
CHEMICAL & PHARMACEUTICAL BULLETIN, 1987, 35 (11) : 4568 - 4573
[27] Potentiometric pCO2 sensor using polyaniline-coated pH-sensitive electrodes
Cui, G
Lee, JS
Kim, SJ
Nam, H
Cha, GS
Kim, HD
ANALYST, 1998, 123 (09) : 1855 - 1859
[28] pH-sensitive pHluorins as a molecular sensor for in situ monitoring of enzyme-catalyzed prodrug activation
Liu, Hui
Cao, Xiaodan
Wang, Ping
Ma, Xingyuan
BIOTECHNOLOGY AND APPLIED BIOCHEMISTRY, 2017, 64 (04) : 482 - 489
[29] Development of pH-sensitive indicator dyes for the preparation of micro-patterned optical sensor layers
Trupp, S.
Alberti, M.
Carofiglio, T.
Lubian, E.
Lehmann, H.
Heuermann, R.
Yacoub-George, E.
Bock, K.
Mohr, G. J.
SENSORS AND ACTUATORS B-CHEMICAL, 2010, 150 (01): : 206 - 210
[30] Self-oscillatory actuation at constant DC voltage with pH-sensitive chitosan/polyaniline hydrogel blend
Kim, Seon Jeong
Kim, Min Sup
Kim, Sun I.
Spinks, Geoffrey M.
Kim, Byung Chul
Wallace, Gordon G.
CHEMISTRY OF MATERIALS, 2006, 18 (24) : 5805 - 5809

← 1 2 3 4 5 →