Gold-microrods/Pd-nanoparticles/polyaniline-nanocomposite-interface as a peroxidase-mimic for sensitive detection of tropomyosin

Mohamad, Azureen; Rizwan, Mohammad; Keasberry, Natasha Ann; Nguyen, Anh; Лам, Тран Дай; Ahmed, Minhaz Uddin

doi:10.1016/j.bios.2020.112108

Cited by 41 publications

(16 citation statements)

References 46 publications

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“…A nanocomposite based on gold-microrods (AuMRs), Pd-nanoparticles (PdNPs), and polyaniline (PANI) was employed to modify an SPCE and to assemble a label-free electrochemical immunosensor for the shrimp TPM detection [ 98 ]. Commercial AuMRs were casted on the electrode surface, then PdNPs were electrodeposited onto them, and finally the aniline electropolymerization was carried out, as illustrated in Figure 3 .…”

Section: Electrochemical Biosensors For Food Allergen Detectionmentioning

confidence: 99%

“… Scheme of the preparation of the SPCE modified with AuMRs/PdNPs/PANI composite and assembly of the TPM immunosensor: ( A ) AuMRs casted onto the working electrode, electrodeposition of PdNPs, and electropolymerization of PANI; ( B ) ( a ) AuMRs/PdNPs/PANI-modified SPCE; ( b ) TPM-Ab functionalized and immobilized onto the modified SPCE after EDC/NHS activation; ( c ) blocking of biosensor surface by BSA; ( d ) addition of different concentrations of TPM; ( e ) electrochemical measurements using CA and DPV techniques. Reprinted with permission from [ 98 ]. Copyright 2020, Elsevier.…”

Section: Figurementioning

confidence: 99%

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Recent Advances in Electrochemical Sensing Strategies for Food Allergen Detection

Curulli

2022

Biosensors

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Food allergy has been indicated as the most frequent adverse reaction to food ingredients over the past few years. Since the only way to avoid the occurrence of allergic phenomena is to eliminate allergenic foods, it is essential to have complete and accurate information on the components of foodstuff. In this framework, it is mandatory and crucial to provide fast, cost-effective, affordable, and reliable analysis methods for the screening of specific allergen content in food products. This review reports the research advancements concerning food allergen detection, involving electrochemical biosensors. It focuses on the sensing strategies evidencing different types of recognition elements such as antibodies, nucleic acids, and cells, among others, the nanomaterial role, the several electrochemical techniques involved and last, but not least, the ad hoc electrodic surface modification approaches. Moreover, a selection of the most recent electrochemical sensors for allergen detection are reported and critically analyzed in terms of the sensors’ analytical performances. Finally, advantages, limitations, and potentialities for practical applications of electrochemical biosensors for allergens are discussed.

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Section: Electrochemical Biosensors For Food Allergen Detectionmentioning

confidence: 99%

Section: Figurementioning

confidence: 99%

Recent Advances in Electrochemical Sensing Strategies for Food Allergen Detection

Curulli

2022

Biosensors

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“…21 Presently, many forms of nanozymes are available based on gold, graphene, platinum, zeolites, micelles, metalloproteins, supramolecules, and dendrimers. 8,10,22,23 These are usually inexpensive and have considerably high stability. Hence, they are an exciting option to overcome the disadvantages of natural enzymes like low stability, lowered catalytic performance under changing conditions, additional steps required for purication of the enzymes, low reusability.…”

Section: Introductionmentioning

confidence: 99%

Nanozyme-based sensors for detection of food biomarkers: a review

et al. 2022

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“…Because we have elucidated the interface electronic structure of L‐cysteine with Au, Ag, and Cu in our previous study, the present study was dedicated to investigating the interface electronic structure of L‐cysteine on Pd. In the development process of biodevices and application of biomolecules to medical applications, Pd has recently attracted many medical applications 16–18 . For instance, it is well‐known that dental casting alloys are categorized into metal alloys such as Au, Ag, Cu, Pd, and Pt, which allow them to interact with proteins contained in foods 19,20 .…”

Section: Introductionmentioning

confidence: 99%

“…In the development process of biodevices and application of biomolecules to medical applications, Pd has recently attracted many medical applications. [16][17][18] For instance, it is well-known that dental casting alloys are categorized into metal alloys such as Au, Ag, Cu, Pd, and Pt, which allow them to interact with proteins contained in foods. 19,20 Therefore, research works of the interaction of Lcysteine on the Pd surface are interesting from a bioelectronics perspective with a focus on the protein and also comparing the results with Au, Ag, and Cu.…”

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confidence: 99%

Ultraviolet photoelectron spectroscopic study on the interface electronic structure of the L‐cysteine on Pd surface

Koswattage

Liyanage

Maduwantha

2022

Surface & Interface Analysis

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L-cysteine is one of the most versatile biomolecules with a unique metal-binding ability. L-cysteine has an outstanding role in the bioelectronics field as a linker between proteins of biomolecules and metal electrodes of the inorganic metals through multiple functional groups. The interface electronic structures between L-cysteine with metals deserve further investigation for applications in bioelectronics. However, the interface electronic structures of L-cysteine and metals have not been well understood. We have previously reported the existence of a new state between the highest occupied molecular orbital (HOMO) of L-cysteine and the Fermi level of the metals for L-cysteine/Au(111), L-cysteine/Ag(111), and L-cysteine/Cu(111) using photoemission spectroscopy and attributed the formation of the new state to an interaction of the d band with HOMO of L-cysteine. In this study, the electronic structure at the interfaces of L-cysteine on a Palladium (Pd) surface is investigated by ultraviolet photoemission spectroscopy (UPS) using synchrotron radiation including work function, secondary electron cutoff (SECO), and HOMO onset; the position of an interface state, charge injection barrier, and ionization energy are estimated. It is observed that thin-film spectra of L-cysteine on Pd surfaces in the valance top region are different from the L-cysteine thick films, and this can be attributed to an interaction between a sulfur-originated state of L-cysteine HOMO with Pd d orbitals. Also, a 0.6-eV SECO shift is estimated due to the charge transferring between L-cysteine and Pd. The results of SECO further confirm the weakening of the Pd-sulfur bond with increasing L-cysteine coverage on Pd.

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Gold-microrods/Pd-nanoparticles/polyaniline-nanocomposite-interface as a peroxidase-mimic for sensitive detection of tropomyosin

Cited by 41 publications

References 46 publications

Recent Advances in Electrochemical Sensing Strategies for Food Allergen Detection

Recent Advances in Electrochemical Sensing Strategies for Food Allergen Detection

Nanozyme-based sensors for detection of food biomarkers: a review

Ultraviolet photoelectron spectroscopic study on the interface electronic structure of the L‐cysteine on Pd surface

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