Surface-enhanced Raman scattering spectra of radial breathing and G band modes in functionalised nanotubes

Al-Alttar, Nebras; Kopf, Ilona; Flavin, Kevin; Kennedy, Eamonn; Giordani, Silvia; Rice, James H.

doi:10.1016/j.cplett.2013.02.072

Cited by 5 publications

(6 citation statements)

References 40 publications

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“…Fig. 4b shows the result of measuring the E-field for different excitation wavelength for the substrate etched for 7.5min (2). The result is compared with experimental measured absorption of the Au nanorod substrate after 7.5 min etching (1).…”

Section: Fem Calculationsmentioning

confidence: 99%

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Application of AAO Matrix in Aligned Gold Nanorod Array Substrates for Surface-Enhanced Fluorescence and Raman Scattering

et al. 2014

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In this paper we probe surface enhanced Raman scattering (SERS) and Surface enhanced Fluorescence (SEF) from probe molecule Rhodamine 6G (Rhod6G) on self-standing Au nanorod array substrates made using a combination of anodization and potentiostatic electrodeposition. The finished substrates were embedded within a porous alumina template. By varying the etching time i.e. the thickness of the alumina, we show that there exists an inverse relationship between SERS and SEF. SERS and SEF also show a nonlinear response to increasing etching time due to an inhomogeneous plasmon activity across the nanorod. By modeling the electromagnetic fields created at different etching times we confirm the nonuniform plasmon activity along the Au nanorods and explain the nonlinear behaviors of SERS and SEF. Optimization of the level of alumina matrix thickness optimizes conditions for obtaining either maximized SERS, SEF or for simultaneously observing both SERS and SEF together.

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Section: Fem Calculationsmentioning

confidence: 99%

“…[1][2][3][4][5][6][7][8] When LSPs are formed, strongly enhanced electromagnetic near-fields are generated at the surface of the supporting nanostructure. This property has attracted considerable research interest due to its potential applications in sensors, photonic circuits and medical diagnostics and therapeutics.…”

Section: Introductionmentioning

confidence: 99%

Application of AAO Matrix in Aligned Gold Nanorod Array Substrates for Surface-Enhanced Fluorescence and Raman Scattering

et al. 2014

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“…This study used Raman spectroscopy to analyze the char of the EP/APP/FS composites, which were left in a high-temperature environment (600 °C) for 1 and 5 min. The Raman spectrum was observed for changes in the disorder (D)-band and graphitic (G)-band [ 36 , 37 ]. The D-band, which is located at 1350 cm −1 , represents an irregular sp 3 structure formed by linear carbon chains.…”

Section: Resultsmentioning

confidence: 99%

A Study on Circular Economy Material Using Fish Scales as a Natural Flame Retardant and the Properties of Its Composite Materials

et al. 2021

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Fish scales (FSs) are fishery wastes that can cause environmental pollution. This study aimed to solve this environmental problem. FSs were used as a flame retardant for polymer materials, making them valuable. Fish scales were combined with a commercial flame retardant, ammonium polyphosphate (APP), through synergistic effects to reduce the amount of commercial flame retardant. The use of FSs conforms to the concept of a circular economy and lowers costs by reducing the consumption of APP. Thermogravimetric analysis (TGA), integral procedural decomposition temperature (IPDT), pyrolysis kinetics, limiting oxygen index (LOI), the Underwriters Laboratories 94 (UL94) flammability test, scanning election microscopy, Raman spectroscopy, and energy-dispersive X-ray spectroscopy were used to determine the thermal properties, flame retardant properties, flame retardant mechanism, char morphology, and composition of the composites. The TGA results indicated that the addition of 40% flame retardant raised the char residue from 16.45 wt.% (pure EP) to 36.07 wt.%; IPDT from 685.6 °C (pure EP) to 1143.1°C; LOI from 21% (pure EP) to 30%; and UL94 classification from fail (pure EP) to V-0. These results suggest an increase in char residue, which indicates better protection of the polymer matrix material. The improvements in IPDT, LOI, and UL94 classification, which indicate greater thermal stability, lower flammability (from flammable to fireproof), and higher flammability rating (from fail to V-0), respectively, suggest that the composite material has favorable thermal properties and is less inflammable.

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“…The microscope was also equipped with two single-photon counting avalanche photodiodes with a Hanbury Brown–Twiss configuration for time-resolved measurements. 28−30 All data acquisition, dark-field images, fluorescence images, and wide-field SERS images were constructed using LightField software (Princeton Instruments, version 5.3). Data processing, such as averaging, summing, variance, data binning, and generating contour plots, were performed using codes written in MATLAB (MathWorks, version 16a).…”

Section: Experimental Methodsmentioning

confidence: 99%

Single-Molecule Nonresonant Wide-Field Surface-Enhanced Raman Scattering from Ferroelectrically Defined Au Nanoparticle Microarrays

Al-Shammari¹,

Al-Attar

Manzo

et al. 2018

ACS Omega

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Single-molecule detection by surface-enhanced Raman scattering (SERS) is a powerful spectroscopic technique that is of interest for the sensor development field. An important aspect of optimizing the materials used in SERS-based sensors is the ability to have a high density of “hot spots” that enhance the SERS sensitivity to the single-molecule level. Photodeposition of gold (Au) nanoparticles through electric-field-directed self-assembly on a periodically proton-exchanged lithium niobate (PPELN) substrate provides conditions to form well-ordered microscale features consisting of closely packed Au nanoparticles. The resulting Au nanoparticle microstructure arrays (microarrays) are plasmon-active and support nonresonant single-molecule SERS at ultralow concentrations (<10 –9 –10 –13 M) with excitation power densities <1 × 10 –3 W cm –2 using wide-field imaging. The microarrays offer excellent SERS reproducibility, with an intensity variation of <7.5% across the substrate. As most biomarkers and molecules do not support resonance enhancement, this work demonstrates that PPELN is a suitable template for high-sensitivity, nonresonant sensing applications.

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Surface-enhanced Raman scattering spectra of radial breathing and G band modes in functionalised nanotubes

Cited by 5 publications

References 40 publications

Application of AAO Matrix in Aligned Gold Nanorod Array Substrates for Surface-Enhanced Fluorescence and Raman Scattering

Application of AAO Matrix in Aligned Gold Nanorod Array Substrates for Surface-Enhanced Fluorescence and Raman Scattering

A Study on Circular Economy Material Using Fish Scales as a Natural Flame Retardant and the Properties of Its Composite Materials

Single-Molecule Nonresonant Wide-Field Surface-Enhanced Raman Scattering from Ferroelectrically Defined Au Nanoparticle Microarrays

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