Preparation and characteristics of ruthenium dioxide for pH array sensors with real-time measurement system

Liao, Yi-Hung; Chou, Jung-Chuan

doi:10.1016/j.snb.2007.07.023

Cited by 116 publications

(56 citation statements)

References 31 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…H. Liao et al [22] have used RuO2 thin film as the sensing layer of hydrogen ion selective electrodes (ISE) for pH array sensors. The RuO2 pH-sensing membrane was prepared using the R.F.…”

Section: Ph Sensing Materials and Applicationsmentioning

confidence: 99%

“…In recent years, a number of metal oxides based pH sensors have been developed incorporating IrO2 [16][17][18][19], RuO2 [20][21][22][23][24], PtO2 [25], SnO2 [25], TaO2 [25], TiO2 [25,26] and Ta2O5 [27,28]. pH sensors have been developed using a variety of deposition techniques including magnetron sputtering [20][21][22], sol-gel [17,29], screen-printing [24,30] and plasma enhanced chemical vapour deposition (PECVD) [31,32] and electroplating [33][34][35]. Among the different thin film deposition techniques, magnetron sputtering has become the process of choice for the deposition of a wide range of materials.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Recent Developments in R.F. Magnetron Sputtered Thin Films for pH Sensing Applications—An Overview

2014

View full text Add to dashboard Cite

pH sensors are widely used in chemical and biological applications. Metal oxides-based pH sensors have many attractive features including insolubility, stability, mechanical strength, electrocatalyst and manufacturing technology. Various metal oxide thin films prepared by radio frequency (R.F.) magnetron sputtering have attractive features, including high pH sensitivity, fast response, high resolution, good stability and reversibility as well as potential for measuring pH under conditions that are not favourable for the commonly used glass electrodes-based pH sensors. In addition, thin film pH sensors prepared by R.F. magnetron sputtering offer many advantages, such as ease of packaging, low cost through the use of standard microfabrication processes, miniaturisation, capability of measuring pH at high temperatures, ruggedness and disposability. In this paper, recent development of R.F. magnetron sputtered thin films for pH sensing applications are reviewed.

show abstract

“…H. Liao et al [22] have used RuO2 thin film as the sensing layer of hydrogen ion selective electrodes (ISE) for pH array sensors. The RuO2 pH-sensing membrane was prepared using the R.F.…”

Section: Ph Sensing Materials and Applicationsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Recent Developments in R.F. Magnetron Sputtered Thin Films for pH Sensing Applications—An Overview

2014

View full text Add to dashboard Cite

show abstract

“…Solid oxide electrodes are subject to non-ideal effects such as hysteresis or memory effects that decrease the electrode accuracy and/or sustainability [3,53,54]. According to Bousse et al (1990) …”

Section: Hysteresis Effectmentioning

confidence: 99%

Novel CeO2-based screen-printed potentiometric electrodes for pH monitoring

Betelu

Polychronopoulou

Rebholz

et al. 2011

Talanta

View full text Add to dashboard Cite

Nuclear waste repositories are being installed in deep excavated rock formations in some places in Europe to isolate and store radioactive waste. In France, the Callovo-Oxfordian formation (COx) is a possible candidate for nuclear waste storage. This work investigates the applicability of CeO 2 -based oxides (CeO 2 , Ce 0.8 Sm 0.2 O 2 and Ce 0.8 Zr 0.2 O 2 ) for monitoring the pH of the COx pore water. The study is limited to the pH range between 5.5 and 13.2, which includes the pH values that have been encountered or are anticipated in the COx formation during its evolution as radioactive waste repository due mainly to alkalinisation, an increase in salinity, a decrease in redox potential. Screen-printing was done to assemble electrodes and rapidly generate data sets. The electrochemical behavior of CeO 2 -based screen-printed electrodes (CeO 2 -based SPEs) was determined by cyclic voltammetry and electrochemical impedance spectroscopy. The use of the electrodes for pH sensing was then evaluated by potentiometric measurements. The feasibility of measuring pH with CeO 2 -based SPEs was first tested in NH 4 Cl/NH 3 buffer solutions, leading to electrode calibration over the widest range of pH, from around neutral to basic pH. Experiments were then conducted in NaHCO 3 /Na 2 CO 3 buffer samples similar to conditions prevailing in the COx formation.Ce 0.8 Zr 0.2 O 2 SPEs exhibit a near-Nernstian behavior (sensitivity -(51±2)mV/pH) in the pH range 5.5-13.2 at 25 °C. Electrode response was slightly affected by the direction of the pH change. Electrode reliability was clearly demonstrated for pH monitoring. Probes based on the same components, but more durably designed, could be considered for pH measurements in radioactive waste repositories.

show abstract

“…Researchers have been trying for a long time to overcome these problems and develop a new pH measurement system which could be also helpful for making a new generation of wireless pH sensors for online monitoring of water quality [1,2,13,14] yttria stabilized zirconia (YSZ), perovskite materials, like lithium lanthanum titanate, etc., were used for this application [10,11,[15][16][17][18][19][20][21][22][23][24]. A few of publications reported on RuO 2 based [4,[25][26][27][28][29] pH sensors for online pH monitoring of water. As compared to other pH sensitive solid state materials, RuO 2 exhibits excellent sensitivity, close to the Nernstain response in a wide pH range, high accuracy and lower susceptibility to interferences caused by other ions dissolved in water [2].…”

Section: Introductionmentioning

confidence: 99%

A Low-Cost pH Sensor Based on RuO<sub>2</sub> Resistor Material

Manjakkal

Cvejin

Kulawik

et al. 2013

View full text Add to dashboard Cite

Abstract. Fresh water deficiency caused by climate change calls for employing novel measures to ensure safety of drinking water supply. Wireless sensor networks can be used for monitoring hydrological conditions across wide area, allowing flow forecasting and early detection of pollutants.While there are no fundamental technological obstacles to implementation of large area sensor networks, their feasibility is constrained by unit cost of sensing nodes. This paper describes a lowcost pH sensor, intended for use in fresh water monitoring. The sensor was fabricated in a standard thick film process, and an off-the-shelf resistive paste was used as a sensing material. For the fabrication of sensor, RuO 2 resistive paste was screen printed on the alumina substrate with silver conducting layer. Test solutions with pH ranging from 2 to 10 were prepared from HCl or KOH solutions. The potential difference between reference and sensing electrode (electromotive force emf of an electrochemical cell) should be proportional to the pH of a solution according to the Nernst equation. The fabricated sensor exhibits Nernstian response to pH. Influence of storage conditions on sensing performance was also investigated.

show abstract

Preparation and characteristics of ruthenium dioxide for pH array sensors with real-time measurement system

Cited by 116 publications

References 31 publications

Recent Developments in R.F. Magnetron Sputtered Thin Films for pH Sensing Applications—An Overview

Recent Developments in R.F. Magnetron Sputtered Thin Films for pH Sensing Applications—An Overview

Novel CeO2-based screen-printed potentiometric electrodes for pH monitoring

A Low-Cost pH Sensor Based on RuO<sub>2</sub> Resistor Material

Contact Info

Product

Resources

About