Comparative evaluation of enzyme-free nanoclay-ionic liquid based electrodes for detection of bioanalytes

Joshi, Nidhi; Sharma, Abhimanyu; Rawat, Kamla; Asokan, K.; Solanki, Pratima R.; Lakshmi, G. B. V. S.; Kanjilal, D.; Bohidar, H. B.

doi:10.1039/c6ra11514d

Cited by 3 publications

(2 citation statements)

References 27 publications

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“…Finally, Joshi et al [96] also developed electrodes based on laponite and montmorillonite clays and imidazolium chloride-based ionic liquids. These electrodes were used for detection of diverse bioanalytes, namely, ascorbic, oxalic, and citric acid, as well as urea, glucose, or cholesterol.…”

Section: Other Organic Biomedical Compounds' Detectionmentioning

confidence: 99%

New Trends in Nanoclay-Modified Sensors

et al. 2021

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Nanoclays are widespread materials characterized by a layered structure in the nano-scale range. They have multiple applications in diverse scientific and industrial areas, mainly due to their swelling capacity, cation exchange capacity, and plasticity. Due to the cation exchange capacity, nanoclays can serve as host matrices for the stabilization of several molecules and, thus, they can be used as sensors by incorporating electroactive ions, biomolecules as enzymes, or fluorescence probes. In this review, the most recent applications as bioanalyte sensors are addressed, focusing on two main detection systems: electrochemical and optical methods. Particularly, the application of electrochemical sensors with clay-modified electrodes (CLME) for pesticide detection is described. Moreover, recent advances of both electrochemical and optical sensors based on nanoclays for diverse bioanalytes’ detection such as glucose, H2O2, organic acids, proteins, or bacteria are also discussed. As it can be seen from this review, nanoclays can become a key factor in sensors’ development, creating an emerging technology for the detection of bioanalytes, with application in both environmental and biomedical fields.

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Section: Other Organic Biomedical Compounds' Detectionmentioning

confidence: 99%

New Trends in Nanoclay-Modified Sensors

et al. 2021

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“…S1 ). Use of mixed clays of Laponite ® and MMT for tuning the rheology of hydrogel nanocomposites, and for designing enzyme-free electrodes is rising 8 , 19 . In this study, we use binary aqueous dispersions of nanoclays to form the gel, composed of synthetic hectorite (Laponite ® , platelet diameter of 25 nm, and rim thickness of 1 nm) and natural montmorillonite (Na-MMT, average diameter of 250 nm, and rim thickness of 1 nm), which are both clay minerals with different properties shown in Table S1 (SI).…”

Section: Introductionmentioning

confidence: 99%

In-situ Observation of Hierarchical Self-Assembly Driven by Bicontinuous Gelation in Mixed Nanodisc Dispersions

Pujala

Schneijdenberg

Blaaderen

et al. 2018

Sci Rep

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The search for new functional soft materials with precise and reconfigurable structures at the nano and meso-scale is a major challenge as well as objective of the current science. Patchy colloids of different shape and functionalities are considered important new building blocks of a bottom-up approach towards rational design of new soft materials largely governed by anisotropic interactions. Herein, we investigate the self-assembly, growth of hierarchical microstructures and aging dynamics of 2D nano-platelets of two different aspect ratios (Laponite ~25 and Montmorillonite ~250) which form gels with different porosity that is achieved by tuning their mixing ratios. Qualitative in situ real-space studies are carried out, including fluorescent confocal microscopy imaging of the bicontinuous gelation process or final states, which provides dynamic visualization of the self-organization. The bicontinuous gels exhibit a foam-like morphology having pores of a few micrometers in size that can be tuned by varying the mixing ratio of nanoplatelets. It is shown that this new class of clay gels has unique and tunable physical properties that will find potential applications in the development of low cost lithium ion batteries, nanocomposites and nuclear waste management.

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An Overview on Electrochemical Determination of Cholesterol

Amiri

Arshi

2020

Electroanalysis

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Cholesterol detection is of great significance in biomedical applications because it is a crucial biomarker for some diseases. It is the precursor of different biological compounds such as vitamin D, hormones, and bile acid, etc. The cholesterol level in blood correlated to various diseases such as hypolipoproteinaemia, septicaemia, malnutrition hypertension, anaemia, brain thrombosis and arteriosclerosis for instance its levels in the blood of more than 200 mg/dL, increase the risk of heart disease. It is also found in foods from animal origin such as milk, meat, cheese, egg and seafood. With respect to dietary reference value for cholesterol intake, most of food safety authorities recommended maximum intake 300 mg per day for adults. Consequently, cholesterol is considered as a critical indicator of clinical biochemistry and introducing new techniques for determination of it in biological samples and food is important. In this review, Principles, methods and recent developments in electrochemical cholesterol sensors are reviewed. Special attention is given to the discussion on some problems and bottlenecks in areas of enzymatic cholesterol sensing and new advances in non-enzymatic sensors.

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Comparative evaluation of enzyme-free nanoclay-ionic liquid based electrodes for detection of bioanalytes

Abstract: Enzyme-free electrodes were fabricated using mixed nanoclays and ionic liquids.

Cited by 3 publications

References 27 publications

New Trends in Nanoclay-Modified Sensors

New Trends in Nanoclay-Modified Sensors

In-situ Observation of Hierarchical Self-Assembly Driven by Bicontinuous Gelation in Mixed Nanodisc Dispersions

An Overview on Electrochemical Determination of Cholesterol

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