Application of Surface Plasmon Resonance Based on a Metal Nanoparticle

Sadrolhosseini, Amir Reza; Noor, Ahmad Shukri Mohd; Moksin, Mohd Maarof Abd.

doi:10.5772/51219

Cited by 4 publications

(2 citation statements)

References 64 publications

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“…However, we observed that by means of fabricating Ag caps on Al NRs could generate intense hotspots at sharp edges. Further, we also found that larger nanocaps (100 nm) showed enhancement due to the creation of multipole modes as the overall volume is increasing [36]. The average size of 50 nm Ag nanocaps on Al nanorods shows high enhancement up to the order of 10 7 for rhodamine 6G (R6G) using a portable handheld Raman spectrometer of 785 nm laser as shown in figure 1.…”

Section: Introductionmentioning

confidence: 72%

Fabrication of low cost highly structured silver capped aluminium nanorods as SERS substrate for the detection of biological pathogens

Das¹,

Goswami²,

Gayathri³

et al. 2021

Nanotechnology

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We report the fabrication of low cost highly structured silver (Ag) capped aluminium (Al) nanorods (NRs) as surface enhanced Raman spectroscopy (SERS) substrate utilising the glancing angle deposition technique. The nano-capping of silver onto the Al NRs can concentrate the local electric field within the minimal volume that can serve as hotspots. The average size of the Ag nanocaps was 50 nm. The newly proposed nanoporous Ag capped Al NRs as SERS substrate could detect the Raman signal of rhodamine 6G (R6G) up to 10 −15 molar concentration. The significant enhancement in the Raman signal of 10 7 was achieved for Ag capped Al NRs considering R6G as a probe molecule. Using the developed SERS substrate, we recorded Raman spectra for Escherichia coli bacteria with its concentration varying from 10 8 colony forming units per ml (CFU ml −1 ) up to 10 2 CFU ml −1 . All the reported Raman spectra were acquired by a portable handheld Raman spectrometer. Hence, this newly proposed low cost, effective SERS substrate can be used commercially for the onsite detection of clinical pathogens. The 3D finite difference time domain simulation model was performed for Ag capped Al nanostructure to understand the generation of hotspots. The simulated results show excellent agreement with the experimental results. We fabricated uncapped Ag nanorods of similar dimensions and performed the experimental measurements and simulations for comparison. We found a significant enhancement in Ag capped Al NRs compared to the long Ag NRs. The description of the Raman signal enhancement has been elaborated.

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Section: Introductionmentioning

confidence: 72%

Fabrication of low cost highly structured silver capped aluminium nanorods as SERS substrate for the detection of biological pathogens

Das¹,

Goswami²,

Gayathri³

et al. 2021

Nanotechnology

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show abstract

“…Fourier transform infrared infrared (FTIR) spectroscopy was provide information on secondary metabolites, generally providing functional groups that involved in the reduction and capping of DS-AgNPs (Fig 1c), The FTIR Spectrum of AgNPs shoed major absorbance peak at 1112.57, and 1322.68, 1348.21, 1454.80, 1633.05, 2360.68, 2960.92, and 3381.49, cm-1. (Table -2) That signi es the presence of phytoconstituents and act as the capping agents for green synthesized DS-AgNPs [32].…”

Section: Synthesis and Characterizationmentioning

confidence: 99%

Datura Stramonium leaves extract Silver Nanoparticles regulates PINK1 gene in Parkinson’s disease model of Drosophila melanogaster

Devaraju

Gopinath

Hanumanthappa

et al. 2022

Preprint

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In recent years, several eco-friendly processes for the synthesis of silver nanoparticles (AgNPs) are increasing; they have tremendous applications in the field of diagnosis and therapeutic values for various diseases /disorders. In this article the green synthesis of Datura stramonium leaves extract silver nanoparticles (DS-AgNPs) was carried out and are characterized for different properties like reduction of Ag + to Ag◦, absorption maxima, functional group of secondary metabolites, crystalline structure, morphology, and size by using UV-Vis spectroscopy, fourier transform infrared spectroscopy (FITR) X-ray spectroscope (XRD), scanning electron microscopy (SEM) and atomic force microscopy (AFM) respectively. Further the effects of DS-AgNPs on WT Park TM3 SB and WI Park 25 Parkinson’s mutant Drosophila melanogaster was assessed by the Negative geotaxis assay and PINK 1 gene expression. Treatment with DS-AgNPs exhibited increased geotaxis behavior and with a positive survival percentage, finally PINK1 was found to be down regulated as the treatment concentrations increased in WI Park 25 mutant but up regulated in WT Park TM3 SB mutant PD model. Although more molecular mechanism needs to be understood, however the use of DS-AgNPs can be a promising treatment strategy for the PD.

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Surface Plasmon Resonance Sensor to Detect n‐Hexane in Palm Kernel Oil Using Polypyrrole Nanoparticles Reduced Graphene Oxide Layer

et al. 2021

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Palm kernel oil was extracted using n-hexane. Rotary evaporator and oven were used to remove n-hexane from the oil. Measurement of n-hexane in low concentration is significant and interest subject. In this study, the concentration of n-hexane was measured using the surface plasmon resonance technique. In order to improve the sensitivity of surface plasmon resonance sensor, the polypyrrole nanoparticles decorated reduced graphene oxide (sensing layer) was prepared using the electrodeposition technique on the surface of gold film. Different concentration of n-hexane in isooctane and the palm kernel oil before and after purification was tested using sensing layer. The sensor limit was about 1 ppm. The results were matched with the gas chromatography results. The thickness and roughness of sensing layer were increased after the interaction with n-hexane which was obtained from atomic force microscopy.

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Application of Surface Plasmon Resonance Based on a Metal Nanoparticle

Cited by 4 publications

References 64 publications

Fabrication of low cost highly structured silver capped aluminium nanorods as SERS substrate for the detection of biological pathogens

Fabrication of low cost highly structured silver capped aluminium nanorods as SERS substrate for the detection of biological pathogens

Datura Stramonium leaves extract Silver Nanoparticles regulates PINK1 gene in Parkinson’s disease model of Drosophila melanogaster

Surface Plasmon Resonance Sensor to Detect n‐Hexane in Palm Kernel Oil Using Polypyrrole Nanoparticles Reduced Graphene Oxide Layer

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