Silver Nanocube- and Nanowire-Based SERS Substrates for Ultra-low Detection of PATP and Thiram Molecules

Kumar, G. V. Pavan; Soni, R. K.

doi:10.1007/s11468-020-01172-0

Cited by 36 publications

(15 citation statements)

References 57 publications

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“…This observation supports that the charge transfer mechanism is particularly significant at low concentrations where analyte molecules have less opportunity to be located near hot spots. [ 21 ] Finite‐difference time‐domain (FDTD) simulation results show that strong hot spots are formed near the gaps between the Ag NWs and GaN NPs with an approximate width of 5 nm (Figure S2 , Supporting Information). Therefore, analytes are less likely to be located near hot spots at extremely low concentrations, which only cover a small area of the substrate.…”

Section: Resultsmentioning

confidence: 99%

Synergistic SERS Enhancement in GaN‐Ag Hybrid System toward Label‐Free and Multiplexed Detection of Antibiotics in Aqueous Solutions

et al. 2021

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Noble metal-based surface-enhanced Raman spectroscopy (SERS) has enabled the simple and efficient detection of trace-amount molecules via significant electromagnetic enhancements at hot spots. However, the small Raman cross-section of various analytes forces the use of a Raman reporter for specific surface functionalization, which is time-consuming and limited to low-molecular-weight analytes. To tackle these issues, a hybrid SERS substrate utilizing Ag as plasmonic structures and GaN as charge transfer enhancement centers is presented. By the conformal printing of Ag nanowires onto GaN nanopillars, a highly sensitive SERS substrate with excellent uniformity can be fabricated. As a result, remarkable SERS performance with a substrate enhancement factor of 1.4 × 10 11 at 10 fM for rhodamine 6G molecules with minimal spot variations can be realized. Furthermore, quantification and multiplexing capabilities without surface treatments are demonstrated by detecting harmful antibiotics in aqueous solutions. This work paves the way for the development of a highly sensitive SERS substrate by constructing complex metal-semiconductor architectures.

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Section: Resultsmentioning

confidence: 99%

Synergistic SERS Enhancement in GaN‐Ag Hybrid System toward Label‐Free and Multiplexed Detection of Antibiotics in Aqueous Solutions

et al. 2021

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“…The EF was calculated to be about 1 Â 10 6 , which is comparable to the results obtained by other authors who used silver-based SERS substrates for detecting pyridine and thiram molecules. 22,24,41,42 The representative peak for abamectin at 1447 cm À1 was also chosen to study the quantitative detection by monitoring the intensity of this band as a function of the abamectin concentration. Fig.…”

Section: Sers Measurementsmentioning

confidence: 99%

Optimum fabrication parameters for preparing high performance SERS substrates based on Si pyramid structure and silver nanoparticles

et al. 2021

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“…Still, the total amount of the S−C−S group in the fungicide mixture was correlated with I 0.5 , where I is the intensity of the SERS signal at 1382 cm −1 . Other recently published papers related to the detection DTFs usually work with thiram as probe analyte using a variety of silver nanomaterials for the SERS effect [ 22 , 23 , 24 ].…”

Section: Advances In Dtfs Detectionmentioning

confidence: 99%

Advances in the Detection of Dithiocarbamate Fungicides: Opportunities for Biosensors

et al. 2020

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Dithiocarbamate fungicides (DTFs) are widely used to control various fungal diseases in crops and ornamental plants. Maximum residual limits in the order of ppb-ppm are currently imposed by legislation to prevent toxicity problems associated with excessive use of DTFs. The specific analytical determination of DTFs is complicated by their low solubility in water and organic solvents. This review summarizes the current analytical procedures used for the analysis of DTF, including chromatography, spectroscopy, and sensor-based methods and discusses the challenges related to selectivity, sensitivity, and sample preparation. Biosensors based on enzymatic inhibition demonstrated potential as analytical tools for DTFs and warrant further research, considering novel enzymes from extremophilic sources. Meanwhile, Raman spectroscopy and various sensors appear very promising, provided the selectivity issues are solved.

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Silver Nanocube- and Nanowire-Based SERS Substrates for Ultra-low Detection of PATP and Thiram Molecules

Cited by 36 publications

References 57 publications

Synergistic SERS Enhancement in GaN‐Ag Hybrid System toward Label‐Free and Multiplexed Detection of Antibiotics in Aqueous Solutions

Synergistic SERS Enhancement in GaN‐Ag Hybrid System toward Label‐Free and Multiplexed Detection of Antibiotics in Aqueous Solutions

Optimum fabrication parameters for preparing high performance SERS substrates based on Si pyramid structure and silver nanoparticles

Advances in the Detection of Dithiocarbamate Fungicides: Opportunities for Biosensors

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