Printed flexible bifunctional electrochemical urea-pH sensor based on multiwalled carbon nanotube/polyaniline electronic ink

Bao, Qiwen; Yang, Zhengchun; Song, Yanfei; Fan, Meiying; Pan, Peng; Li, Jun; Liao, Zhenyu; Wei, Jun

doi:10.1007/s10854-018-0447-5

Cited by 32 publications

(10 citation statements)

References 47 publications

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“…Carbon nanotubes (CNTs) can be used as part of composite electrode material for non-enzymatic glucose sensor applications, owing to its high surface area, good electrical conductivity, unique structure, ultra-strong mechanical properties, and high stability [57,155,156]. The CNTs are mainly used as substrates of metal oxide nanoparticles [157].…”

Section: Carbon Nanotubes/metal Oxide Composite-based Electrodementioning

confidence: 99%

Metal oxide-based composite for non-enzymatic glucose sensors

Liu

Zeng

Guo

et al. 2020

J Mater Sci: Mater Electron

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The increasing demand for monitoring the glucose concentration in the blood of diabetic patients has aroused the attention of researchers to prepare high-performance glucose biosensors. After decades of development, enzyme-based biosensors have gradually matured and commercialized, but they still suffer from insufficient stability due to the inherent defects of the enzyme. Non-enzymatic glucose sensor was proposed to address this issue. The introduction of nanotechnology has provided more possibilities for the preparation of highly efficient catalytic materials. Among the synthesized electrocatalysts, metal oxides are one of the most important components owing to their outstanding properties. Recent studies have integrated metal oxides with other materials to further improve sensor performance. This review focuses on the application of metal oxide-based hybrid structure in the glucose sensor, mainly including metal oxide/metal oxide, metal/metal oxide, and carbon material/metal oxide. The preparation method, electrochemical properties, and catalytic mechanism of the sensors are discussed in detail. Finally, we present some of the existing challenges and make personal predictions for the future development of non-enzymatic glucose sensors.

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Section: Carbon Nanotubes/metal Oxide Composite-based Electrodementioning

confidence: 99%

Metal oxide-based composite for non-enzymatic glucose sensors

Liu

Zeng

Guo

et al. 2020

J Mater Sci: Mater Electron

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“…PANI has also been combined with other compounds like MWCNTs, forming a PANI/MWCNT composite. [139] This allowed the modulation of electrical properties via a connection or region of conductive channels, which formed in the polymer matrix by adding MWCNTs. The result showed smoother electrical signals in the detecting electrode, which served to improve its relatively low conductivity and increase its overall sensitivity.…”

Section: Polymersmentioning

confidence: 99%

“…The categorization of solution-based chemistry covers several methods that are controlled by thermodynamic processes, [28] chemical kinetics, precursor compounds that homogenize in a solution to form a film when hardened, [15,20,182] or there is a binding agent in the solution that helps the mixture adhere to the substrate. [51,112,139] A majority of the colorimetric pH sensors are made from anthocyanins that are homogenized in solutions to form films after extracting them from the vegetables in Figure 18. a) Schematic sheet representation of single-walled CNTs formed by rolling up graphene sheets along lattice vectors to form armchair, zigzag, or chiral tubes conformational CNTs.…”

Section: Ph Sensorsmentioning

confidence: 99%

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Nanomaterials in Smart Packaging Applications: A Review

Siddiqui

Taheri

Alam

et al. 2021

Small

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a crucial factor in quality control, making it crucial in controlling its effects on consumer health. [6] Expiration dates on food are currently used to estimate its effective lifetime, which indicate the quality as well, however, the lack of real time information and inability to report food conditions put consumers at risk of either contracting food-borne illnesses or wasting food. The cumulative effect of these issues have demanded the need to build and develop systems that can be integrated with the food while it is being stored or in transit from the farms to the stores. [7] Traditional packaging has promising potential as an alternative to traditional packaging. The aim of traditional packaging is to support and maintain food quality while also extending the food product freshness. To do so, various systems or system components can be inserted/embedded into the food packaging which can release/absorb substances from/into the packaged food to help prevent the food from spoiling or to monitor the spoiling process. [8,9] Packaging materials and their capabilities are growing rapidly with the research and development of smart packaging using novel materials and methods for applications like detecting and reporting the quality of food in real-time. The main goal of smart packaging is to be able to monitor the conditions of the packaged food and/or the surrounding environment, and provide this information to a consumer in real-time using sensors to detect or record any changes relevant to the conditions of the food. [10] Among the many noninvasive sensors that can monitor food quality and safety, pH sensors are of note as the pH levels in the food are indicators of changes in its chemical composition, and influence of chemical and biological reactions in the food. Time-temperature indicators (TTIs) are also critical indicators in indicating the changes of the composition of food because the temperature determines if chemical reactions occur, and if so, to what degree. [11,12] Temperature is known to affect pH through its influence on chemical reactions as well as the concentration of hydrogen ions (H + ) or hydroxide ions (OH − ). The pH sensors will detect the pH level to provide information on the chemical composition of the food and how the chemical composition changes. The TTIs will indicate how quickly the temperaturedependent chemical reactions occur and the influence temperature has on the pH of each food. Together, pH sensors and TTIs can detect the collective effects of pH and temperature in food and how they influence the spoiling process. [13] Food wastage is a critical and world-wide issue resulting from an excess of food supply, poor food storage, poor marketing, and unstable markets. Since food quality depends on consumer standards, it becomes necessary to monitor the quality to ensure it meets those standards. Embedding sensors with active nanomaterials in food packaging enables customers to monitor the quality of their food in real-time. Though there are many different sensors that can monitor foo...

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“…However, these methods require advanced instrumentation and the process is expensive. In contrary to the above analytical techniques, electrochemical sensing enables the low cost detection of heavy metals and it requires simple instrumentation [12,13]. In electrochemical sensing, the extent of sensitivity and the range of selectivity depends on the electrode modifier used [14,15].…”

Section: Introductionmentioning

confidence: 99%

Nickel tungstate nanoparticles: synthesis, characterization and electrochemical sensing of mercury(II) ions

Eranjaneya

Adarakatti²,

Ashoka

et al. 2019

J Mater Sci: Mater Electron

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Nano particulate metal oxides gained significant research interest in recent years for various applications with the intension of exploring enhanced properties of miniaturization. In this research work, nickel tungstate nanoparticles (NiWO 4 nanoparticles) were successfully synthesized via a simple and efficient sucrose-nitrate decomposition method. The synthesized nanoparticles were characterized using various analytical techniques such as PXRD, SEM, TEM, BET measurements and FTIR. Transmission electron microscope images reveals the nearly spherical shaped nanoparticles of average particle size 15-35 nm. Photoluminescence characteristics of synthesized NiWO 4 nanoparticles were investigated at room temperature. Further, the prepared nanoparticles were utilized as glassy carbon electrode modifier for trace level electrochemical sensing of toxic mercury present in water samples. The electrochemical behavior of mercury(II) ions at modified electrode interface has been studied by cyclic voltammetry (CV) and differential pulse stripping voltammetry (DPSV). The results illustrate that, the proposed modified GCE sensor exhibits linearity between the concentration range 10-600 nM with the limit of detection 2.25 nM based on 3σ method for mercury(II) ions. Hanumantharayappa Eranjaneya and Prashanth Shivappa Adarakatti have contributed equally.

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Printed flexible bifunctional electrochemical urea-pH sensor based on multiwalled carbon nanotube/polyaniline electronic ink

Cited by 32 publications

References 47 publications

Metal oxide-based composite for non-enzymatic glucose sensors

Metal oxide-based composite for non-enzymatic glucose sensors

Nanomaterials in Smart Packaging Applications: A Review

Nickel tungstate nanoparticles: synthesis, characterization and electrochemical sensing of mercury(II) ions

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