The effect of solvent environment toward optimization of SERS sensors for pesticides detection from chemical enhancement aspects

De, Zhang; Liang, Pei; Yu, Zhi; Huang, Jie; Ni, Dejiang; Shu, Haibo; Dong, Qin

doi:10.1016/j.snb.2017.09.209

Cited by 57 publications

(36 citation statements)

References 54 publications

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“…The optimization in the sensitivity degree of SERS‐active nanostructures is typically focused on modifications in its shape, size, composition, and aggregation level. Different methods of preparation consider reducing agents such as sodium citrate, the irradiation with UV–Vis light, sodium borohydride (NaBH 4 ), formic acid, sodium citrate and NaBH4, butylamine, agarose, ascorbic acid, ethylene glycol, ammonia, polyvinyl(pyrrolidone)—PVP, sodium citrate, and ascorbic acid . Table summarizes different Ag‐based SERS systems and the influence of reducing agents on detection level of different pesticides.…”

Section: Theoretical Backgroundmentioning

confidence: 99%

“…The use of ascorbic acid as a reducing agent in the presence of PVP generates flower‐shaped AgNPs . Zhang et al explored the same procedure for production of flower‐shaped silver colloid on Si wafer. The numerous anisotropic protrusions as sources of hot spots on the surface had a higher stability and accuracy on rapid detection of ethion, since the molecular adsorption on the flower‐shaped AgNPs showed a high interaction of functional groups with the metal surface.…”

Section: Theoretical Backgroundmentioning

confidence: 99%

“…In addition to the size and aggregation level of nanoparticles, different parameters are relevant in the optimization of pesticides detection process, such as solution pH, solvent type, and density of AgNPs …”

Section: Theoretical Backgroundmentioning

confidence: 99%

“…In terms of other parameters, the type of solvents affects the SERS results. Xie et al and Zhang et al demonstrated that spectra varies the intensity for different solvents. Zhang et al indicated that solvent environment can be effectively improved to promote nonresonance enhancement of chemical bonding between adsorbate/metal substrate and resonance enhancement of light‐induced charge transfer in analyte‐metal system by excitation light.…”

Section: Theoretical Backgroundmentioning

confidence: 99%

“…Kim et al, Xie et al, and Zhang et al reported that Raman peaks are sensitive to changes in pH. Based on this information, the detection of the ethion was evaluated at intermediate pH values, more precisely for pH values in the range of 6.66–11.11 .…”

Section: Theoretical Backgroundmentioning

confidence: 99%

See 4 more Smart Citations

Silver‐based surface enhanced Raman spectroscopy devices for detection of organophosphorus pesticides traces

Soares

2019

Biotechnology Progress

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The detection of traces of substances by surface‐sensitive techniques such as surface enhanced Raman spectroscopy (SERS) explores the interaction of adsorbed molecules on plasmonic surfaces to improve the limit of detection of analytes. This article is an overview about recent development in SERS substrates applied in the detection of organophosphorus pesticides on plasmonic surfaces (arrays of metal nanoparticles). The morphology, roughness, chemical functionalization degree, and aggregation level of plasmonic centers are some of the critical parameters to be controlled in the optimization of SERS signal from specific analytes.

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Section: Theoretical Backgroundmentioning

confidence: 99%

Section: Theoretical Backgroundmentioning

confidence: 99%

Section: Theoretical Backgroundmentioning

confidence: 99%

Section: Theoretical Backgroundmentioning

confidence: 99%

Section: Theoretical Backgroundmentioning

confidence: 99%

See 3 more Smart Citations

Silver‐based surface enhanced Raman spectroscopy devices for detection of organophosphorus pesticides traces

Soares

2019

Biotechnology Progress

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Graphene Chemeo‐Phononics for Biosensor Applications: An Interfacial Raman Transducer

Keisham

Kim

Cotts

et al. 2022

Adv Materials Inter

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limitations of such interfacial systems, it is important to understand the mechanisms involved in systems where biological components are interfaced with graphene.Graphene has been investigated as a robust and sensitive platform for biosensing, both through field-effect transistor (FET) biosensors and electrochemical biosensors. [16][17][18][19] FET biosensors can offer a sensitive detection platform that is able to detect very low concentrations (≈fg mL −1 ) of pathogens with a near-instantaneous response. [20] On the other hand, electrochemical biosensors enable the detection of target pathogens with little to no additional sample preparation, as well as in situ detections. [21] However, FET biosensors typically involve complicated photolithography and deposition processes for device fabrication. Electronic flow through electrochemical biosensors can interfere with the target analyte and/or trigger unwanted electrochemical reactions on the sensor's surface. To this end, Raman spectroscopy provides a versatile bioanalytical platform to assess label-free, chemically, and spatially defined information of cells and tissues at the molecular level. [22][23][24] Although Raman spectroscopy is not the only vibrational spectroscopy used for biomedical analysis, it offers numerous advantages compared to other spectroscopic techniques, such as 1) the ability to analyze aqueous samples, since water has a small Raman cross-section, [25,26] whereas it has high absorbance in Fourier transform infrared (FTIR) resulting in possible interference with the sample's spectrum; 2) the ability to scan over a wide range of wavenumbers with high spatial resolution; 3) label-free analysis, as the fundamentals underlying Raman spectroscopy enable the study of tissues/cells in their native states. The molecule-specific bands in Raman spectra provide direct information about the biochemical composition.Numerous review articles are available documenting the interaction of graphene and biological systems [14,15,[27][28][29][30] as well as understanding the behavior of biosystems using Raman spectroscopy. [22][23][24]31] However, probing the graphene biointerface with Raman spectroscopy by analyzing the phononic changes in graphene, rather than the biological signatures, offers unique advantages as graphene phonons are shown to be sensitive to the interfacial events that accompany carrier doping. [32] The objective of this review is to delineate the principles and mechanisms involved in the sensitive graphene phononic modification resulting from the interface with different biosystems and to evaluate the potential biomedical field applications (Figure 1).Leveraging the phononic sensitivity and scalability of nano-biointerfaces has accelerated the growth of unique and versatile biosensors. Graphene has the properties of a near-ideal signal transducer, due to the strong coupling between its interfacial and phononic properties. This enables sensitive yet quick detection of surface interactions on graphene via Raman spectral analysis. The Raman-ac...

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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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The effect of solvent environment toward optimization of SERS sensors for pesticides detection from chemical enhancement aspects

Cited by 57 publications

References 54 publications

Silver‐based surface enhanced Raman spectroscopy devices for detection of organophosphorus pesticides traces

Silver‐based surface enhanced Raman spectroscopy devices for detection of organophosphorus pesticides traces

Graphene Chemeo‐Phononics for Biosensor Applications: An Interfacial Raman Transducer

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

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