Analysis of non-ideal effects and electrochemical impedance spectroscopy of arrayed flexible NiO-based pH sensor

In this study, nickel oxide (NiO) was used as sensing film of arrayed flexible NiO-based pH sensor, which could reach high sensitivity (63.376 mV/pH) by potentiometric measurement system. Non-ideal effects of the sensor, such as drift and hysteresis effects, were investigated. Drift rate in pH 7 was 3.436 mV/hr, and hysteresis voltages in loops of pH 7 → pH 3 → pH 7 → pH 11 → pH 7 and pH 7 → pH 11 → pH 7 → pH 3 → pH 7 were respectively 4.496 mV and 1.817 mV. Moreover, sensing mechanism was characterized by electrochemical impedance spectroscopy.

[1]  Richard A. Durst,et al.  Definition of pH scales, standard reference values, measurement of pH and related terminology (Provisional) , 1983 .

[2]  Monika Tomar,et al.  NiO nanoparticle-based urea biosensor. , 2013, Biosensors & bioelectronics.

[3]  Curtis C. Johnson,et al.  Hydrogen, Calcium, and Potassium Ion-Sensitive FET Transducers: A Preliminary Report , 1978, IEEE Transactions on Biomedical Engineering.

[4]  Wouter Olthuis,et al.  A method of reducing oxygen induced drift in iridium oxide pH sensors , 1998 .

[5]  Jung-Chuan Chou,et al.  Drift behavior of ISFETs with a-Si : H-SiO2 gate insulator , 2000 .

[6]  Wolfgang Göpel,et al.  Ta2O5-gates of ph-sensitive devices : comparative spectroscopic and electrical studies , 1989 .

[7]  Krzysztof Zaraska,et al.  Electrochemical Impedance Spectroscopic Analysis of RuO2 Based Thick Film pH Sensors , 2015 .

[8]  Heiner Kaden,et al.  Investigation of the dynamic response behaviour of ISFET pH sensors by means of laser Doppler velocimetry (LDV) , 1995 .

[9]  Krzysztof Zaraska,et al.  Sensing mechanism of RuO2–SnO2 thick film pH sensors studied by potentiometric method and electrochemical impedance spectroscopy , 2015 .

[10]  Kamal Alameh,et al.  Temperature effects on the performance of RuO2 thin-film pH sensor , 2015 .

[11]  P Bergveld,et al.  Development of an ion-sensitive solid-state device for neurophysiological measurements. , 1970, IEEE transactions on bio-medical engineering.

[12]  Tai-Ping Sun,et al.  Study on the sensing characteristics and hysteresis effect of the tin oxide pH electrode , 2005 .

[13]  J. Chou,et al.  Sensitivity and hysteresis effect in Al2O3 gate pH-ISFET , 2001 .

[14]  Chia-Hung Lin,et al.  A Novel pH-dependent Drift Improvement Method for Zirconium Dioxide Gated pH-Ion Sensitive Field Effect Transistors , 2010, Sensors.

[15]  R. Lin,et al.  Highly sensitive palladium oxide thin film extended gate FETs as pH sensor , 2014 .

[16]  Eli Ruckenstein,et al.  Specific ion effects on double layer forces through ion hydration , 2014 .