Clay/au nanoparticle composites as acetylcholinesterase carriers and modified-electrode materials: A comparative study

Phongphut, Angkana; Chayasombat, Bralee; Cass, Anthony E. G.; Sirisuk, Akawat; Phisalaphong, Muenduen; Prichanont, Seeroong; Thanachayanont, Chanchana

doi:10.1016/j.clay.2020.105704

Cited by 18 publications

(19 citation statements)

References 54 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Enzymatic biosensors based on CLME can be used for the determination of pesticides through their inhibitory action on enzyme activity. In the last decade, the main studies have been centered in the determination of glyphosate and chlorpyriphos (see Table 4) [49][50][51]. For example, a biosensor based on atemoya peroxidase immobilized into a modified nanoclay (montmorillonite containing 0.5-5 wt.% aminopropyltriethoxysilane and 15-35 wt.% octadecylamine) was developed [49].…”

Section: Nanoclay-based Sensors For Environmental Applicationsmentioning

confidence: 99%

“…For the detection of chlorpyriphos, several nanoclays functionalized with chitosan [50] or metallic NPs [52] were employed for the fabrication of enzymatic biosensors via immobilization of acetylcholinesterase (AChE) [50,51].…”

Section: Nanoclay-based Sensors For Environmental Applicationsmentioning

confidence: 99%

“…The hybridization of nanoclays and Au NPs provided remarkable composite materials with high electrochemical conductivity, high surface-to-volume ratio, high chemical reactivity, and chemisorption capacity of various types of molecules [53]. Phongphut et al [51] found that Montmorillonite with Au NPs (Mt/Au NPs) was the best support for AChE loading, showing residual activities due to its high specific surface area and weak electrostatic interaction with the immobilized enzyme (Figure 2). However, when kaolinite was used as supported material for the Au NPs (Kaol/AuNPs), a lowest detection limit resulted, presumably due to the strong hydrophobic surface that helped to concentrate the nonpolar pesticide to the vicinity of the immobilized enzyme.…”

Section: Nanoclay-based Sensors For Environmental Applicationsmentioning

confidence: 99%

See 2 more Smart Citations

New Trends in Nanoclay-Modified Sensors

et al. 2021

View full text Add to dashboard Cite

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.

show abstract

Section: Nanoclay-based Sensors For Environmental Applicationsmentioning

confidence: 99%

Section: Nanoclay-based Sensors For Environmental Applicationsmentioning

confidence: 99%

Section: Nanoclay-based Sensors For Environmental Applicationsmentioning

confidence: 99%

See 1 more Smart Citation

New Trends in Nanoclay-Modified Sensors

et al. 2021

View full text Add to dashboard Cite

show abstract

“…The device is tested in biological media for CA15-3 detection, and it shows an elongated antifouling performance with only a negligible activity change during 30 days. Natural clay has been under research as a transducer surface modification agent due to its stability, porosity, high cation exchange capacity, low price, and widespread availability [ 106 , 107 ]. A glucose biosensor based on a platinum disk modified with PANI, chitosan, montmorillonite clay particles, and platinum nanoparticles shows extended stability up to two months with excellent stability and selectivity [ 108 ].…”

Section: Conducting Polymer Compositesmentioning

confidence: 99%

Recent Advances of Conducting Polymers and Their Composites for Electrochemical Biosensing Applications

Luong

Narayan

Solanki

et al. 2020

JFB

View full text Add to dashboard Cite

Conducting polymers (CPs) have been at the center of research owing to their metal-like electrochemical properties and polymer-like dispersion nature. CPs and their composites serve as ideal functional materials for diversified biomedical applications like drug delivery, tissue engineering, and diagnostics. There have also been numerous biosensing platforms based on polyaniline (PANI), polypyrrole (PPY), polythiophene (PTP), and their composites. Based on their unique properties and extensive use in biosensing matrices, updated information on novel CPs and their role is appealing. This review focuses on the properties and performance of biosensing matrices based on CPs reported in the last three years. The salient features of CPs like PANI, PPY, PTP, and their composites with nanoparticles, carbon materials, etc. are outlined along with respective examples. A description of mediator conjugated biosensor designs and enzymeless CPs based glucose sensing has also been included. The future research trends with required improvements to improve the analytical performance of CP-biosensing devices have also been addressed.

show abstract

“…The first-generation pesticide electrochemical sensors exploited the well-known acetylcholinesterase enzyme inhibition assay to detect pesticide residues [16][17][18][19]. This enzyme-based pesticide sensor was found to possess high sensitivity and selectivity towards OPPs, but its low stability, low electrical conductivity, and high costs halted it from being available in a practical application [20][21][22][23][24].…”

Section: Introductionmentioning

confidence: 99%

Development of a Nonenzymatic Electrochemical Sensor for Organophosphate Pesticide Detection Using Copper (II) Oxide Nanorod Electrodes

Sakdarat

Chongsuebsirikul

Thanachayanont

et al. 2021

Journal of Nanomaterials

Self Cite

View full text Add to dashboard Cite

Inorganic electrode materials of low cost, lower complexity, and high stability have become the more preferred choice over enzyme usage in electrochemical sensors. In this work, copper oxide (CuO) nanorods (NRs) were synthesized on copper foil as electrodes through anodization and annealing processes. The synthesized electrodes were used to analyse the organophosphate pesticides (OPPs) and interference molecules by cyclic voltammetry. The CuO NR sensor was able to identify and quantify different kinds of OPPs with an elevated sensitivity of 1.269, 1.425, 1.657, and 2.833 μA/ng mL-1 for chlorpyrifos, parathion, paraoxon, and pirimiphos and explicitly separate them from interference molecules (i.e., carbaryl, paraquat, sodium nitrate, sodium sulphate, and toluene). Moreover, this electrochemical pesticide sensor achieved a very low limit of detection (LOD) in the 10-7 molar level with a high selectivity among all tested analytes. The LOD for each pesticide ranged from 0.29 to 0.61 μM, revealing the ability to define the maximum residue limit in food. In short, our enzyme-free CuO NR sensor is a promising platform to deliver a fast, low-cost, and reliable pesticide detection unit.

show abstract

Clay/au nanoparticle composites as acetylcholinesterase carriers and modified-electrode materials: A comparative study

Cited by 18 publications

References 54 publications

New Trends in Nanoclay-Modified Sensors

New Trends in Nanoclay-Modified Sensors

Recent Advances of Conducting Polymers and Their Composites for Electrochemical Biosensing Applications

Development of a Nonenzymatic Electrochemical Sensor for Organophosphate Pesticide Detection Using Copper (II) Oxide Nanorod Electrodes

Contact Info

Product

Resources

About