Novel pH microsensor based on a thin film gold electrode modified with lead dioxide nanoparticles

Arida, Hassan

doi:10.1007/s00604-014-1311-9

Cited by 16 publications

(16 citation statements)

References 34 publications

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“…81 The pH sensing range of this sensor was from 0.12 to 13, which is the widest in recent publications. 81 The pH sensing range of this sensor was from 0.12 to 13, which is the widest in recent publications.…”

Section: Potentiometric Sensormentioning

confidence: 99%

“…A super-Nernst response of 84 mV per pH was achieved with b-phase lead dioxide nanoparticles deposited electrochemically. 81 The pH sensing range of this sensor was from 0.12 to 13, which is the widest in recent publications. The superior response was attributed to the multiple oxidation states of lead oxide, which was similar to the electrochemically deposited IrO x .…”

Section: Potentiometric Sensormentioning

confidence: 99%

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Microfabricated electrochemical pH and free chlorine sensors for water quality monitoring: recent advances and research challenges

et al. 2015

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Continuous, real-time monitoring of the level of pH and free chlorine in drinking water is of great importance to public health. However, it is challenging when conventional analytical instruments, such as bulky pH electrodes and expensive free chlorine meters, are used. These instruments have slow response, are difficult to use, prone to interference from operators, and require frequent maintenance. In contrast, microfabricated electrochemical sensors are cheaper, smaller in size, and highly sensitive.Therefore, these sensors are desirable for online monitoring of pH and free chlorine in water. In this review, we discuss different physical configurations of microfabricated sensors. These configurations include potentiometric electrodes, ion-sensitive field-effect transistors, and chemo-resistors/transistors for electrochemical pH sensing. Also, we identified that micro-amperometric sensors are the dominant ones used for free chlorine sensing. We summarized and compared the structure, operation/sensing mechanism, applicable materials, and performance parameters in terms of sensitivity, sensing range, response time and stability of each type of sensor. We observed that novel sensor structures fabricated by solution processing and operated by smart sensing methodologies may be used for developing pH and free chlorine sensors with high performance and low cost. Finally, we highlighted the importance of the concurrent design of materials, fabrication processes, and electronics for future sensors.

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Section: Potentiometric Sensormentioning

confidence: 99%

Section: Potentiometric Sensormentioning

confidence: 99%

Microfabricated electrochemical pH and free chlorine sensors for water quality monitoring: recent advances and research challenges

et al. 2015

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“…Te microfabrication of miniaturized potentiometric screen-printed microchips represents an important challenge in the expanding feld of modern analytical tools [23][24][25][26] due to their mass production, integration, and automation feasibility. Such potentiometric microsensors have the advantages of small size, a wide range of applications, high reproducibility, good accuracy, and a small sample volume [27][28][29][30].…”

Section: Introductionmentioning

confidence: 99%

“…Tis paper, consequently, describes microfabrication, potentiometric characterization, and analytical application of terbinafne based on potentiometric screen-printed microsensors modifed by multiwall carbon nanotubes (MWCNTs). Based on our previous work, a combination of the screen-printed platform substrate with modifcation of the sensitive element with MWCNTs and the nebulization process of the cocktail coating mixture recently developed results in superior potentiometric response parameters in terms of sensitivity, selectivity, credibility, and versatile applicability [19,21,25,27]. Realization of such microdevices generates new generations of useful and promising microchip sensors for the detection of drugs and biological species from diferent real samples with high accuracy and precision.…”

Section: Introductionmentioning

confidence: 99%

Modified Screen-Printed Microchip for Potentiometric Detection of Terbinafine Drugs

Elbeshlawy

Arida

2022

Journal of Chemistry

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The development of miniaturized microchips has widespread and growing interest in manufacturing potentiometric sensors with extremely valuable modifying response characteristics. In this context, here, we demonstrate microfabrication, electrochemical evaluation, and analytical applications of disposable thin-film potentiometric microsensors responsive to terbinafine antifungal medication. Miniaturized microchips have been realized by integration of the sensitive layer membrane modified by carbon nanotubes onto the surface of the plastic screen-printed microchip support using a new approach, which has been recently developed. The sensitive membrane comprises terbinafine HCl: ammonium heptamolybdate complex ion pair as ionophore, o-nitrophenyl octyl ether as a solvent mediator, potassium tetrakis (4-chlorophenyl) borate as an anion excluder, and polyvinyl chloride as support. The microsensor based on this plasticised sensitive membrane provides the Nernstian response and covers a wide concentration range of terbinafine of 10−8–10−2 mole·L−1. The merits offered by the elaborated terbinafine microchip over the bulk-based electrode include reasonable sensitivity (58.5 mV/concentration decade), fast response time (∼30 s.), long-term stability (4 months), integration, and automation feasibility. Furthermore, microfabricated terbinafine chips were successfully applied to the measurements of the investigated medication in some real samples with high accuracy (96.9%) and precision (<3%).

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“…Currently, the pH glass electrode is widely used for the measurement of pH values [ 4 ], as it has the advantages of a wide measuring range and high accuracy [ 5 ]. However, the pH glass electrode has a short lifetime [ 6 ] and is susceptible to interference from electromagnetic wave and radio frequency; it is also easily contaminated or poisoned while being used in harsh environments (high temperature, high pressure, high corrosion, etc. ), which leads to unstable or invalid measuring results [ 7 ].…”

Section: Introductionmentioning

confidence: 99%

Preparation and Optimization of Optical pH Sensor Based on Sol-Gel

Zhang

Zhou

2018

Sensors

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Making use of the sol-gel technique, an optical pH sensor was prepared, which was made from an organic carrier with four indictors including congo red, bromophenol blue, cresol red, and chlorophenol red, cross-linked by tetraethyl orthosilicate (TEOS) and cellulose acetate. The actual detection range of the optical pH sensor is 2.5–11.0. The optimal ratio of ethyl orthosilicate, absolute ethanol, deionized water, and hydrochloric acid in glue precursor of the sensor-sensitive membrane was explored. The orthogonal experiment was designed to optimize the dosage of cellulose acetate, N,N-dimethylformamide (DMF), indicator, hydrochloric acid, and precursor glue in preparing the sensor-sensitive membrane. The linearity, measurement accuracy, repeatability, stability, and response time of the prepared pH sensor were tested. The measurement results were analyzed using a support vector machine and linear regression. The experimental results show that the optical pH sensor has a measurement accuracy of up to 0.2 pH and better stability and repeatability than the traditional pH glass electrode.

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Novel pH microsensor based on a thin film gold electrode modified with lead dioxide nanoparticles

Cited by 16 publications

References 34 publications

Microfabricated electrochemical pH and free chlorine sensors for water quality monitoring: recent advances and research challenges

Microfabricated electrochemical pH and free chlorine sensors for water quality monitoring: recent advances and research challenges

Modified Screen-Printed Microchip for Potentiometric Detection of Terbinafine Drugs

Preparation and Optimization of Optical pH Sensor Based on Sol-Gel

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