Versatile, low-cost, non-toxic potentiometric pH-sensors based on niobium

Singewald, Tanja Denise; Traxler, Ines; Schimo-Aichhorn, Gabriela; Hild, Sabine; Valtiner, Markus

doi:10.1016/j.sbsr.2022.100478

Cited by 9 publications

(9 citation statements)

References 53 publications

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“…An interesting aspect is the possibility of using single metal oxides or modifying an existing alloy to obtain a mixture of oxides, thus improving the properties of the sensor. On the other hand, it should be mentioned that the way the oxides are prepared has a key influence on their behaviour [11,12]. By modifying the surface of the alloys, it is possible to obtain a much more stable structure and, under certain conditions, a real surface several times larger than the geometric one [12][13][14].…”

Section: Introductionmentioning

confidence: 99%

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pH Sensing for Early Detection of Septic Inflammation Based on Intrinsic Titanium β-Alloy Nanotubular Oxides

Fojt,

Šťovíček,

Jírů

et al. 2024

Metals

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Orthopaedic surgeries like total hip and knee arthroplasty play a crucial role in restoring joint function for individuals with osteoarthritis. Deep bacterial infections are one of the most serious complications for orthopaedic implants. An infectious complication of an orthopaedic implant requires long-term and demanding treatment, often with repeated surgical procedures, and can lead to serious consequences such as implant failure, sepsis, and even death. Early detection of complications is of key importance for efficient therapy. The objective of this work is to investigate the possibilities of the nanotubular TiNbTa oxide for pH change sensing. Different surface treatments which lead to different surface natures were tested. For experiments, the inflammation was simulated by pH changes in the physiological solution. The response of the surface was monitored via the electrode potential changes. The results show that the nanotubular surface prepared on the TiNbTa alloy is a good possible candidate for pH sensing devices.

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Section: Introductionmentioning

confidence: 99%

“…Niobium oxides have not been greatly investigated in the available literature concerning their potential application in pH measurements [11,21]. In their work, Singewald et al [11] tested three different electrode preparations with niobium oxides.…”

Section: Introductionmentioning

confidence: 99%

pH Sensing for Early Detection of Septic Inflammation Based on Intrinsic Titanium β-Alloy Nanotubular Oxides

Fojt,

Šťovíček,

Jírů

et al. 2024

Metals

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show abstract

“…[16][17][18][19] The pH of a solution can be detected in various ways, such as using litmus paper, image sensors, optical fiber sensors, conductometric sensors, and potentiometric sensors. [20][21][22][23][24] A commercially available glass-electrode-based pH sensor based on the potentiometric technique has a twoelectrode configuration. 25,26 The measured electromotive force (EMF, unit of V) between two electrodes can be converted into hydronium ion concentration using the Nernst equation: EMF = E 0 + RT/nF ln Q, where E 0 is the standard EMF, R is the gas constant, F is Faraday's constant, Q is the reaction quotient, and n is the number of electrons.…”

Section: Introductionmentioning

confidence: 99%

“…A change in the pH balance of sweat or blood indicates certain health conditions and medical emergencies including infection, asthma, diabetes, kidney disease, lung disease, and heart disease 16–19 . The pH of a solution can be detected in various ways, such as using litmus paper, image sensors, optical fiber sensors, conductometric sensors, and potentiometric sensors 20–24 . A commercially available glass‐electrode‐based pH sensor based on the potentiometric technique has a two‐electrode configuration 25,26 .…”

Section: Introductionmentioning

confidence: 99%

Preparation of nanopillar array electrode of iridium oxide for high performance of pH sensor and its real‐time sweat monitoring

Yoon

Park

Kil

et al. 2023

Bulletin Korean Chem Soc

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A highly sensitive potentiometric pH sensor was developed based on nanopillar array electrodes of iridium oxide. The as‐prepared pH sensor exhibited a high pH sensitivity (69.43 mV/pH), fast response time (8.1 s), and good durability (0.76 mV/h). The sensing performance of the pH sensor was maintained under mechanical bending and even after 1000 repetitive bending/releasing cycles. As a proof‐of‐concept, a wearable headband sensor was fabricated by integrating the pH sensor with a wireless electronic module based on a printed circuit board. The on‐body test indicated that the wearable pH sensor provides reliable and stable data in the real‐time monitoring of pH changes in human sweat during stationary indoor cycling. The pH sensors based on nanopillar array electrodes of iridium oxide have great potential in many portable or wearable applications in healthcare systems, non‐invasive diagnostics, environmental analysis, and food sensors.

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“…In addition, these nitrides can act as protective layers against oxidation processes 9 and improve tribological performance 10 . Niobium nitride has excellent physical and chemical properties such as hardness 11 , wear resistance 12 , chemical stability 13 , and superconducting properties 14 high electrical conductivity, and superconducting transition temperature 15,16 . Furthermore, plasma nitriding can form a transition layer produced by nitrogen diffusion on the metal surface.…”

Section: Introductionmentioning

confidence: 99%

Study of Surface Modification of Niobium Caused by Nitriding and Cathodic Cage Deposition

et al. 2023

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In this work, plasma nitriding (PN) and cathode cage plasma deposition (CCPN) treatments were carried out with temperatures of 400 and 450 °C to evaluate the modifications caused on the surface of pure niobium samples. XRD, SEM, Vickers microhardness, and sphere-disk analyses were used to characterize the coatings' composition, morphology, hardness, and wear resistance. The results showed that the treated samples increased hardness and wear resistance, with the sample submitted to CCPN at 450 °C presenting the best tribological behavior.

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Versatile, low-cost, non-toxic potentiometric pH-sensors based on niobium

Cited by 9 publications

References 53 publications

pH Sensing for Early Detection of Septic Inflammation Based on Intrinsic Titanium β-Alloy Nanotubular Oxides

pH Sensing for Early Detection of Septic Inflammation Based on Intrinsic Titanium β-Alloy Nanotubular Oxides

Preparation of nanopillar array electrode of iridium oxide for high performance of pH sensor and its real‐time sweat monitoring

Study of Surface Modification of Niobium Caused by Nitriding and Cathodic Cage Deposition

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