Vancomycin functionalization of gold nanostars for sensitive detection of foodborne pathogens through surface‐enhanced Raman scattering

Dayalan, Sandhiya; Gedda, Gangaraju; Li, Ruei–Nian; Zulfajri, Muhammad; Huang, Genin Gary

doi:10.1002/jccs.202200421

Cited by 5 publications

(6 citation statements)

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“…It can be found that the enhanced Raman signals detected by Au@AgNPs and AuNPs were both relatively weak. The Raman enhancement factor (EF) can be determined using the following equation [64]:

EF = (I_{SERS} / I_{RAMAN}) \times (C_{RAMAN} / C_{SERS})

where I SERS denotes the intensity of analytes obtained by SERS, the conventional Raman intensity of the analytes is denoted by I RAMAN ; C RAMAN is the concentration of Raman molecules in the absence of SERS active substrates, and C SERS is the concentration of analytes obtained by SERS substrates, respectively. The EF calculations indicated an increase in the enhancement factors of Tbz from 6.2 × 10 2 with AuNPs, 4.5 × 10 4 with Au@AgNPs, and 2.0 × 10 5 with Au@Ag@CysNPs.…”

Section: Resultsmentioning

confidence: 99%

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Effect of pH on the optimization of cysteine‐functionalized gold core‐silver shell nanoparticles for surface‐enhanced Raman scattering‐based pesticide detection on apple peels

Dayalan

Sudewi

Zulfajri

et al. 2023

J Chinese Chemical Soc

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BackgroundThe rapid detection and efficient properties of surface‐enhanced Raman scattering (SERS) have been widely exploited in food safety.PurposeIn this study, the SERS impact of cysteine‐functionalized gold core‐silver shell bimetallic nanoparticle (Au@Ag@CysNPs) substrates with different pH treatments on pesticide compounds was examined.ResultsThe pH‐dependent SERS impact of Au@Ag@CysNPs on detecting pesticide compounds exhibited different enhancements over the pH range of 2–11 and exited the highest enhancement at a pH of 5 for thiabendazole and thiram pesticides. The prepared Au@Ag@CysNPs were further utilized in SERS‐based rapid detection of pesticides on apple peels by directly dropping Au@Ag@CysNPs on the surface of the samples, where the target molecules could be identified without elution or extraction. These findings revealed that this Au@Ag@CysNPs substrate exhibited excellent SERS performances for pesticide compounds and good stability. With additional optimization, detection limits of 0.1 ng/cm2 for thiabendazole and thiram on apple peels were obtained.

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“…It can be found that the enhanced Raman signals detected by Au@AgNPs and AuNPs were both relatively weak. The Raman enhancement factor (EF) can be determined using the following equation [64]:

EF = (I_{SERS} / I_{RAMAN}) \times (C_{RAMAN} / C_{SERS})

Section: Resultsmentioning

confidence: 99%

“…It can be found that the enhanced Raman signals detected by Au@AgNPs and AuNPs were both relatively weak. The Raman enhancement factor (EF) can be determined using the following equation [64]:…”

Section: Raman Enhancement Mechanism Of Au@ag@cysnpsmentioning

confidence: 99%

Effect of pH on the optimization of cysteine‐functionalized gold core‐silver shell nanoparticles for surface‐enhanced Raman scattering‐based pesticide detection on apple peels

Dayalan

Sudewi

Zulfajri

et al. 2023

J Chinese Chemical Soc

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“…Similarly, bio-chromic conjugated polymers (BCPs) are bio-mimetic biosensors made of conjugated polymers with optical properties suitable for incorporating biologically active cell membrane compounds (Velusamy et al, 2010). Polydiacetylenic cell membrane-mimicking materials aid in the detection of pathogens, toxins and viruses through visible color change and colorimetric detection (Velusamy et al, 2010;Li et al, 2022;Dou et al, 2020). However, it has been observed that BCPs are convenient to use and microfabricate, while MIPs face challenges like imprinted polymer insolubility and the difficult procedure of template removal (Velusamy et al, 2010).…”

Section: Nfs 541mentioning

confidence: 99%

“…Since simple and sensitive detection of this pathogen has always remained a challenge, the development of this sensor will prove beneficial in food safety applications (Duan et al , 2016). In another study, Dayalan et al (2022) also developed the SERS biosensor for the detection of food-borne pathogens. In this study, they recognized the bacterial cells through the specific targeting agent vancomycin having a detection limit of 8.2 and 5.7 CFU/mL for Escherichia coli and Staphylococcus aureus , respectively.…”

Section: Classification Of Biosensormentioning

confidence: 99%

Application of biosensors against food-borne pathogens

Singh,

Sharanagat

2023

NFS

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Purpose Nature and occurrence of food-borne pathogens in raw and processed food products evolved greatly in the past few years due to new modes of transmission and resistance build-up against sundry micro-/macro-environmental conditions. Assurance of food health and safety thus gained immense importance, for which bio-sensing technology proved very promising in the detection and quantification of food-borne pathogens. Considering the importance, different studies have been performed, and different biosensors have been developed. This study aims to summarize the different biosensors used for the deduction of food-borne pathogens. Design/methodology/approach The present review highlights different biosensors developed apropos to food matrices, factors governing their selection, their potential and applicability. The paper discusses some related key challenges and constraints and also focuses on the needs and future research prospects in this field. Findings The shift in consumers’ and industries’ perceptions directed the further approach to achieve portable, user and environmental friendly biosensing techniques. Despite of these developments, it was still observed that the comparison among the different biosensors and their categories proved tedious on a single platform; since the food matrices tested, pathogen detected or diagnosed, time of detection, etc., varied greatly and very few products have been commercially launched. Conclusively, a challenge lies in front of food scientists and researchers to maintain pace and develop techniques for efficiently catering to the needs of the food industry. Research limitations/implications Biosensors deduction limit varied with the food matrix, type of organism, material of biosensors’ surface, etc. The food matrix itself consists of complex substances, and various types of food are available in nature. Considering the diversity of food there is a need to develop a universal biosensor that can be used for all the food matrices for a pathogen. Further research is needed to develop a pathogen-specific biosensor that can be used for all the food products that may have accuracy to eliminate the traditional method of deduction. Originality/value The present paper summarized and categorized the different types of biosensors developed for food-borne pathogens. Graphical abstract

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“…Infectious and chemical contaminants threaten aquatic life and human health worldwide [1][2][3]. Water quality in the environment is deteriorating rapidly due to numerous factors, including the introduction of pathogenic microorganisms and the release of toxic waste containing dyes [4].…”

Section: Introductionmentioning

confidence: 99%

Silver Nanoparticles’ Biogenic Synthesis Using Caralluma subulata Aqueous Extract and Application for Dye Degradation and Antimicrobials Activities

Alamier,

Hasan,

Syed

et al. 2023

Catalysts

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The issue of organic contaminants in water resulting from industrial, agricultural, and home activities makes it necessary to effectively address the problems of water scarcity. Using modern technologies that can effectively remove pollutants from wastewater is the way to address this key problem. The use of nanoparticles (NPs) has been advocated due to their unique physical and chemical characteristics and advantageous applications. NPs’ surface stability and synthesis routes are core concerns for environmental remediation and biological applications. In this work, we demonstrated the biogenic synthesis of silver NPs (Ag-CS NPs) by using Caralluma subulata (CS) aqueous extract as a reducing and capping/template agent. The synthesized Ag-CS NPs were characterized by UV-visible absorbance spectroscopy, Fourier-transform infrared spectroscopy (FTIR), Raman spectroscopy, powdered X-ray diffractometer (XRD), X-ray photoelectron spectroscopy (XPS), scanning electron microscopy (SEM), thermogravimetric analysis (TGA), transmission electron microscopy (TEM), and Zeta potential. The performance of Ag-CS NPs was evaluated on methylene blue (MB) dye degradation and antibacterial activity tests against bacterial and fungal isolates. The results showed that Ag-CS NPs (0.05%, 20.0 μL) reduced MB by 95.52% within 28 min in the presence of NaBH4 (10.0 mM, 0.980 μL). The degradation of MB followed pseudo zero-order chemical kinetics (R2 = 0.9380), with the reaction rate constant 0.0508 mol L−1 min−1. In addition, Ag-CS NPs were applied as antibacterial agents against 19 bacterial isolates. Ag-CS NPs showed inhibition in both Gram-positive and Gram-negative bacterial, as well as fungal isolates. As a greener ecofriendly approach, multifunctional Ag-CS NPs make a promising candidate for the remediation of contaminated water, as well as for important bioapplications.

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Vancomycin functionalization of gold nanostars for sensitive detection of foodborne pathogens through surface‐enhanced Raman scattering

Cited by 5 publications

References 50 publications

Effect of pH on the optimization of cysteine‐functionalized gold core‐silver shell nanoparticles for surface‐enhanced Raman scattering‐based pesticide detection on apple peels

Effect of pH on the optimization of cysteine‐functionalized gold core‐silver shell nanoparticles for surface‐enhanced Raman scattering‐based pesticide detection on apple peels

Application of biosensors against food-borne pathogens

Silver Nanoparticles’ Biogenic Synthesis Using Caralluma subulata Aqueous Extract and Application for Dye Degradation and Antimicrobials Activities

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