Simple treatment of the enhancement of Raman scattering due to a two-dimensional array of metallic spheroids

Chu, Lan-Chan; Wang, Shou-Yih

doi:10.1103/physrevb.31.693

Cited by 10 publications

(3 citation statements)

References 15 publications

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“…The calculation method is based on a two dimensional model proposed by Chu and Wang. 30 It is clear that SERS of Pt does not show any distinct character of surface plasmon resonance, and the enhancement factor just shows a slight variation with the change of the incident photon energy. That means, unlike silver nanoparticles, the SERS intensity of Pt does not vary much with the change of the excitation wavelength in the visible light region.…”

Section: Sers From Pt and Rh Electrodes With Cauliflower-like Morphol...mentioning

confidence: 97%

Surface-enhanced Raman scattering from transition metals with special surface morphology and nanoparticle shape

et al. 2006

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This discussion focuses on our recent approaches at aiming to optimize surface-enhanced Raman scattering (SERS) activity for transition metals (group VIII B elements), by intentionally fabricating desired surface nanostructures or synthesizing nanoparticles. The SERS activity of transition metals critically depends on the surface morphology of electrodes and on size, shape and aggregation form of nanoparticles. A correct surface roughening procedure for transition-metal electrodes is indispensable for fabricating cauliflower-like nanostructures that show a higher SERS activity. Two more methods have been explored to synthesize nanoparticles, i.e., cubic nanoparticles and gold-core palladium-shell nanostructures, respectively. Their SERS activities are considerably higher than those of normal spherical mono-metallic nanoparticles. To explain these observations, a preliminary theoretical calculation, using the three-dimensional finite difference time domain (3D-FDTD) method, was performed to evaluate the local electromagnetic field on transition metal surfaces. The result is in good agreement with the experimental data.

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Section: Sers From Pt and Rh Electrodes With Cauliflower-like Morphol...mentioning

confidence: 97%

Surface-enhanced Raman scattering from transition metals with special surface morphology and nanoparticle shape

et al. 2006

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“…In our further investigation, we performed a simple theoretical calculation on the enhancement factor for nickel metal focusing on the influence of surface morphologies [73], where only an electromagnetic field enhancement was considered. In the calculation, we simplified the calculation into the consideration of particle shape effect by using a two-dimension (2D) theoretical model developed by Chu and Wang who calculated SERS enhancement factors for 2D noble metal spheroids [80]. The calculation result showed that the enhancement factor could reach a value of 10 3 when particles were shaped into spheroids with an aspect ratio of 2:1.…”

Section: Surface Roughening Procedures For Ni Electrodementioning

confidence: 99%

An investigation of the adsorption of pyrazine and pyridine on nickel electrodes by in situ surface-enhanced Raman spectroscopy

Huang

Lin

Yang

et al. 2004

Journal of Electroanalytical Chemistry

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“…An enhanced electric field gives rise to an enhanced polarization, and therefore to an enhanced inelastic scattering. The enhancement factor can be approximated as G = ( Ī TM inner /I 0 ) 2 [16] since the difference between the incident-light frequency ω 0 and Stokes scattering frequency ω is small.…”

Section: Theoretical Analysismentioning

confidence: 99%

Theory of enhanced Raman scattering for circular stratified semiconductor cylinder

Wang

Feng

Cao

et al. 2007

J. Phys.: Condens. Matter

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Based on the electrodynamic theory, we have calculated the scattering fields of infinitely long dielectric nanocylinders with silver coating, and compared them with those of a pure silicon cylinder. The calculation result indicates that there exists an enhanced electric field in the silver-coated silicon nanocylinder and shows a great Raman enhancement factor (∼10(12)) as compared with bulk silicon. For a special area in the silver-coated silicon nanocylinder, the enhancement comes up to 4 × 10(13).

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Simple treatment of the enhancement of Raman scattering due to a two-dimensional array of metallic spheroids

Cited by 10 publications

References 15 publications

Surface-enhanced Raman scattering from transition metals with special surface morphology and nanoparticle shape

Surface-enhanced Raman scattering from transition metals with special surface morphology and nanoparticle shape

An investigation of the adsorption of pyrazine and pyridine on nickel electrodes by in situ surface-enhanced Raman spectroscopy

Theory of enhanced Raman scattering for circular stratified semiconductor cylinder

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