Functionalization techniques for improving SERS substrates and their applications in food safety evaluation: A review of recent research trends

Yaseen, Tehseen; Pu, Hongbin; Sun, Da‐Wen

doi:10.1016/j.tifs.2017.12.012

Cited by 182 publications

(69 citation statements)

References 141 publications

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“…Surface-enhanced Raman scattering (SERS), 4,5 a powerful label-free spectroscopic technique, has been widely used in the elds of food safety, chemical analysis and environmental monitoring. [6][7][8][9] Due to the localized surface plasmon resonance, the plasmonic nanostructures can provide strong near-eld enhancement of electromagnetic eld, and therefore signicantly magnify the Raman signal of molecules adsorbed on the substrate surface. It should be noted that quantitative and ultrasensitive detection of melamine has been carried out in recent years.…”

Section: Introductionmentioning

confidence: 99%

Bioscaffold arrays decorated with Ag nanoparticles as a SERS substrate for direct detection of melamine in infant formula

Zhao

Tian

et al. 2019

RSC Adv.

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Three-dimensional (3D) plasmonic structures have been intensively investigated as high performance surface enhanced Raman scattering (SERS) substrates. Here, we demonstrate a 3D biomimetic SERS substrate prepared by deposition of silver nanoparticles (Ag NPs) on the bioscaffold arrays of cicada wings using laser molecular beam epitaxy. This deposition method can offer a large number of nanoparticles with average diameter of $10 nm and nanogaps of sub-10 nm on the surface of chitin nanopillars to generate a high density of hotspots. The prepared 3D Ag/cicada SERS substrate shows a limit of detection (LOD) for Rhodamine 6G as low as 10 À7 M, high enhancement factor of 1.09 Â 10 5 , and excellent signal uniformity of 6.8%. Moreover, the molecular fingerprints of melamine in infant formula can be directly extracted with an LOD as low as 10 mg L À1 , without the need for functional modification. The prepared SERS-active substrate, due to its low cost, high-throughput, and good detection performance, can be widely used in applications such as food safety and environmental monitoring.

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Section: Introductionmentioning

confidence: 99%

Bioscaffold arrays decorated with Ag nanoparticles as a SERS substrate for direct detection of melamine in infant formula

Zhao

Tian

et al. 2019

RSC Adv.

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“…However, these two methods mentioned above are usually not suitable for detecting small biological molecules. 107 One reason for this is the fact that the recognition site in the biorecognition element may be at a distance from the surface of the plasmonic structure. In this case, the signal generated by the small target molecule decays rapidly with the distance, as described by eqn (2), and the signal may be too weak to be detected.…”

Section: Functionalization Of Substratesmentioning

confidence: 99%

“…The template molecule (the analyte to be detected) is used to generate a specific shape hole in the template polymer leading to specific detection of the analyte. 107 Another method to address the limitation of sensitivity is the use of non-functionalized substrates. In this approach, the molecules of interest may bind directly to the plasmonic structure and generate a measurable signal.…”

Section: Functionalization Of Substratesmentioning

confidence: 99%

Are plasmonic optical biosensors ready for use in point-of-need applications?

Liu

Jalali

Mahshid

et al. 2020

Analyst

143

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Plasmonics has drawn significant attention in the area of biosensors for decades due to the unique optical properties of plasmonic resonant nanostructures. While the sensitivity and specificity of molecular detection relies significantly on the resonance conditions, significant attention has been dedicated to the design, fabrication, and optimization of plasmonic substrates. The adequate choice of materials, structures, and functionality goes hand in hand with a fundamental understanding of plasmonics to enable the development of practical biosensors that can be deployed in real life situations. Here we provide a brief review of plasmonic biosensors detailing most recent developments and applications. Besides metals, novel plasmonic materials such as graphene are highlighted. Sensors based on Surface Plasmon Resonance (SPR), Localized Surface Plasmon Resonance (LSPR), and Surface Enhanced Raman Spectroscopy (SERS) are presented and classified based on their materials and structure. In addition, most recent applications to environment monitoring, health diagnosis, and food safety are presented. Potential problems related to the implementation in such applications are discussed and an outlook is presented. Fundamentals of plasmonic materialsPlasmonics studies the interaction of light with metals or metallic nanostructures. Other materials such as graphene also exhibit plasmonic resonance due to the availability of con-

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“…Food contaminants can be any hazardous substances intentionally or unintentionally added to foods, which may be chemical or microbiological substances either from natural origins or formed during food processing (Wang & Salazar, ) (Jiang, Sun, Pu, & Wei, ; Pan, Pu, & Sun, ; Pan, Sun, Paliwal, Pu, & Wei, ; Pan, Sun, et al, ; Pu, Xiao, & Sun, ; Wang, Sun, Wei, & Pu, ; Xie, Pu, & Sun, ; Yaseen, Pu, & Sun, ). Different from food composition analysis, the maximum allowable limits of food contaminants are usually relative low considering their higher toxicity and greater negative effects on consumer health.…”

Section: Applications In Food Quality and Safety Detectionmentioning

confidence: 99%

Development of Nanozymes for Food Quality and Safety Detection: Principles and Recent Applications

Huang

Sun

et al. 2019

Comp Rev Food Sci Food Safe

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141

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The public concerns about agrifood safety call for innovative and reformative analytical techniques to meet the inspection requirements of high sensitivity, specificity, and reproducibility. Enzyme‐mimetic nanomaterials or nanozymes, which combine enzyme‐like properties with nanoscale features, emerge as an excellent tool for quality and safety detection in the agrifood sector, due to not only their robust capacity in detection but also their attraction in future‐oriented exploitations. However, in‐depth understanding about the fundamental principles of nanozymes for food quality and safety detection remains limited, which makes their applications largely empirical. This review provides a comprehensive overview of the principles, designs, and applications of nanozyme‐based detection technique in the agrifood industry. The discussion mainly involves three mimicking types, that is, peroxidase, oxidase, and catalase‐like nanozymes, capable of detecting major agrifood analytes. The current principles and strategies are classified and then discussed in details through discriminating the roles of nanozymes in diverse detection platforms. Thereafter, recent applications of nanozymes in detecting various endogenous ingredients and exogenous contaminants in foods are reviewed, and the outlook of profound developments are explained. Evidenced by the increasing publications, nanozyme‐based detection techniques are narrowing the gap to practical‐oriented food analytical methods, while some challenges in optimization of nanozymes, diversification of recognition‐to‐signal manners, and sustainability of methodology need to conquer in the future.

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Functionalization techniques for improving SERS substrates and their applications in food safety evaluation: A review of recent research trends

Cited by 182 publications

References 141 publications

Bioscaffold arrays decorated with Ag nanoparticles as a SERS substrate for direct detection of melamine in infant formula

Bioscaffold arrays decorated with Ag nanoparticles as a SERS substrate for direct detection of melamine in infant formula

Are plasmonic optical biosensors ready for use in point-of-need applications?

Development of Nanozymes for Food Quality and Safety Detection: Principles and Recent Applications

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