Advances in flexible surface-enhanced Raman scattering (SERS) substrates for nondestructive food detection: Fundamentals and recent applications

Trends in Food Science & Technology, Journal Year: 2021, Volume and Issue: 109, P. 690 - 701

Published: Jan. 30, 2021

Food safety has attracted considerable attention in recent years. As a rapid, fingerprint-type recognition and nondestructive detection technique, surface-enhanced Raman scattering (SERS) been among the promising techniques to meet increasing needs for food analysis. Currently, emerging flexible SERS substrates as an alternative colloidal rigid have received great interest. Flexible possess advantages of easy sampling by wrapping or swabbing on nonplanar surfaces, which facilitate contaminants from surfaces shed new lights sensitive analytes. In this review, characteristics different materials such cellulose, polymer film, cotton fabric, adhesive tape bio-materials constructing are introduced, strategies including infiltration scheme, swab-sampling in-situ discussed, applications detecting trace pesticides fruits vegetables, chemical residues animal farming fungicides antibiotics, illegal additives food-borne pathogens highlighted. increasingly studied contaminants. preparing substrates, properties should be considered. For strategies, compared with conventional is unique can collect target molecules directly surface, while most convenient, facile nondestructive. Encouraging application results available show that enormous potentials analysis surveillance.

Language: Английский

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Metal–organic frameworks for chemical sensing devices

Materials Horizons, Journal Year: 2021, Volume and Issue: 8(9), P. 2387 - 2419

Published: Jan. 1, 2021

An emerging trend in the application of metal–organic frameworks is to engineer mobile devices possess chemical detecting capabilities for environmental monitoring, point-of-care testing, artificial intelligence, food security and defence.

Language: Английский

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On-off-on fluorescent nanosensing: Materials, detection strategies and recent food applications

Trends in Food Science & Technology, Journal Year: 2021, Volume and Issue: 119, P. 243 - 256

Published: Dec. 2, 2021

Language: Английский

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Rational construction of a robust metal-organic framework nanozyme with dual-metal active sites for colorimetric detection of organophosphorus pesticides

Journal of Hazardous Materials, Journal Year: 2021, Volume and Issue: 423, P. 127253 - 127253

Published: Sept. 20, 2021

Language: Английский

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Ti3C2Tx MXenes loaded with Au nanoparticle dimers as a surface-enhanced Raman scattering aptasensor for AFB1 detection

Food Chemistry, Journal Year: 2021, Volume and Issue: 372, P. 131293 - 131293

Published: Oct. 2, 2021

Mycotoxin B1 (AFB1) contamination in agricultural products pose a deadlydangertoanimal and human health its rapid reliable detection is thus very important. Herein, ratiometric surface-enhanced Raman scattering (SERS) aptasensor for AFB1 was developed, which 1,2-bis(4-pyridyl) ethylene (BPE) used to trigger the assembly of Au nanoparticle dimers (AuNP dimers) form intensive SERS "hot spots", MXenes nanosheets could load aptamer-modified AuNP due hydrogen bonding chelation between phosphate groups aptamers Ti ion MXenes. With presence preferentially binding aptamer, were separated from nanosheets, leading decrease intensity. Regression analysis range 0.001 100 ng·mL-1 showed limit (LOD) being 0.6 pg·mL-1 standard solution, indicating that great prospects dimers/MXenes substrate detecting AFB1.

Language: Английский

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Enzyme Mimics for Engineered Biomimetic Cascade Nanoreactors: Mechanism, Applications, and Prospects

Advanced Functional Materials, Journal Year: 2021, Volume and Issue: 31(50)

Published: Sept. 8, 2021

Abstract Multiple enzyme‐driven biological catalytic cascades occur in living organisms, guiding highly efficient and selective transformations of substrates. Inspired by the merits these cascade systems, enormous efforts have been devoted to developing novel systems mimic reactions over past few years. Nanozymes, a class enzyme mimics, are nanomaterials with enzyme‐like activity. The emergence development nanozymes has significantly advanced biomimetic nanoreactors. Currently, nanoreactors driven widely used exhibit many advantages such as superior efficiency high stability, resulting significant advancements biosensing biomedical applications. latest advances understanding mechanism nanozyme‐engineered their progressive applications for comprehensively covered here. First, nanozyme enzyme/nanozyme‐engineered categorized according properties. Then, applications, including cancer therapy, antibacterial activity, antioxidation, hyperuricemia therapy covered. conclusion describes most important challenges opportunities remaining this exciting area research.

Language: Английский

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Bioinspired Nanomodification Strategies: Moving from Chemical-Based Agrosystems to Sustainable Agriculture

ACS Nano, Journal Year: 2021, Volume and Issue: 15(8), P. 12655 - 12686

Published: Aug. 4, 2021

Agrochemicals have supported the development of agricultural economy and national population over past century. However, excessive applications agrochemicals pose threats to environment human health. In last decades, nanoparticles (NPs) been a hot topic in many fields, especially agriculture, because their physicochemical properties. Nevertheless, prevalent methods for fabricating NPs are uneconomical involve toxic reagents, hindering extensive sector. contrast, inspired by biological exemplifications from microbes plants, extract biomass can act as reducing capping agent form without any reagents. synthesized through these bioinspired routes cost-effective, ecofriendly, high performing. With nanotechnology, biosynthetic (bioNPs) proven be substitute strategy traditional heavy-metal remediation soil, promotion plant growth, management disease with less toxicity higher performance. Therefore, synthesis will an inevitable trend sustainable fields. This critical review demonstrate discuss influence bioNPs on crop diseases compared chemical or agrochemicals.

Language: Английский

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Magnetic surface-enhanced Raman scattering (MagSERS) biosensors for microbial food safety: Fundamentals and applications

Trends in Food Science & Technology, Journal Year: 2021, Volume and Issue: 113, P. 366 - 381

Published: May 16, 2021

Microbiological safety of food is closely related to the activities foodborne microorganisms, which among critical issues in industry that require careful screening. A series analytical techniques have been employed for microbiological detection but renders either defects or practical limitations. With sensitive and fingerprint sensing ability surface-enhanced Raman scattering (SERS) technique easy operations magnetic entities (MEs), SERS-based platforms (MagSERS) emerge as a potent candidate analysis hazards. The current review focuses on fundamentals recent applications MagSERS food. In this review, design fabrication are introduced, comprises functionalized MEs plus noble-metal SERS substrates, nanocomposites principles illustrated detail, including combination capture, separation, enrichment targets (via recognition elements MEs) with well magnetism-mediated hotspot engineering substrates. addition, advances methods detecting bacteria, biological toxins, viruses summarized future perspectives also given. Key findings conclusions: As demonstrated by publications field, merges properties spectra can facilitate biohazards their excellent target separation (sampling), simplified assay procedures (assaying), optimized effect signal signalling. such, show promising prospect construction more simple, rapid, biosensors safety.

Language: Английский

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Reproducible, shelf-stable, and bioaffinity SERS nanotags inspired by multivariate polyphenolic chemistry for bacterial identification

Analytica Chimica Acta, Journal Year: 2021, Volume and Issue: 1167, P. 338570 - 338570

Published: April 28, 2021

Efficient identification of pathogenic bacteria is greatly concerned with microbial food safety and foodborne diseases diagnosis. Surface-enhanced Raman scattering (SERS) tags are among the cutting-edge tools for bioanalysis, but facing troubles in either SERS sensitivity, durability, interfering signals, or universal recognition agents target bacteria. This work proposed a multivariate scheme enabled by polyphenolic chemistry green synthesis, facile stabilization (functionalization), protective encapsulation, bio-affinitive design metal-phenolic networks (MPNs)-encapsulated silver nanotags ([email protected]@MPNs). With remarkable properties, shelf stability, bacterial affinity, [email protected]@MPNs rapid, reproducible, interference-free detection two representative pathogens (i.e., E. coli O157: H7 S. aureus) assistance an aptamer-labelled magnetic probe, reaching good sensitivity selectivity. Moreover, this biosensor worked well real samples, manifesting potential customization detection.

Language: Английский

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Photosensitized Peroxidase Mimicry at the Hierarchical 0D/2D Heterojunction‐Like Quasi Metal‐Organic Framework Interface for Boosting Biocatalytic Disinfection

Small, Journal Year: 2022, Volume and Issue: 18(20)

Published: April 18, 2022

Abstract Metal‐organic frameworks (MOFs) are a versatile toolbox for the bioinspired design of nanozymes antibacterial applications and beyond, however, designing nanozyme by hierarchical quasi‐MOF scheme remains largely unpracticed. This work exemplifies preferential structure‐activity correlation bimetallic (Q‐MOF Ce0.5 ) among three series MOF‐derived peroxidase (POD) mimics. The biomimetic nanosheets accommodate both oxygen vacancy‐coupled multivalent redox cycles photosensitive energy band layout, benefiting from heterojunction‐like 0D/2D interface featuring isolated nodes‐derived CeOCu sites upon 2D decarboxylated MOF scaffold. These integrated unique merits enable POD‐like Q‐MOF to generate sustained reactive species effectively eradicate surface‐adhered bacteria under visible light, resulting in significant inactivation Escherichia coli (99.74 %) Staphylococcus aureus (99.35%) vitro, potent disinfection skin wounds vivo safe on‐demand manners. It is hoped that this can intensify interventions against microbial world.

Language: Английский

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