Surface-enhanced Raman scattering substrate of silver nanoparticles depositing on AAO template fabricated by magnetron sputtering

Nuntawong, Noppadon; Horprathum, Mati; Eiamchai, Pitak; Wong-ek, Krongkamol; Patthanasettakul, Viyapol; Chindaudom, Pongpan

doi:10.1016/j.vacuum.2009.12.020

Cited by 67 publications

(31 citation statements)

References 19 publications

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“…This is in agreement with the literature since at higher concentrations the MB is supposed to take rather edge-on adsorptive stance on the surface with the face-on orientation preferable at lower concentrations 41, 46 . The concentration used in our experiments (10 −6 M) is expected to be slightly above the complete surface coverage 41, 47 . We have to note, though, that the group theory (together with experimentally measured depolarization ratios) provides information only on the orientation of the molecular symmetry axis with respect to the surface, but says nothing about the distribution of the planes of the fused phenyl rings of the molecules with respect to or .…”

Section: Resultsmentioning

confidence: 99%

Anisotropic Optical Response of Silver Nanorod Arrays: Surface Enhanced Raman Scattering Polarization and Angular Dependences Confronted with Ellipsometric Parameters

Šubr

Petr

Kylián

et al. 2017

Sci Rep

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Silver nanorod arrays prepared by oblique angle deposition (AgOADs) represent versatile, simple and inexpensive substrates for high sensitivity surface enhanced Raman scattering (SERS) applications. Their anisotropic nature suggests that their optical responses such as the SERS signal, the depolarization ratio, reflectivity and ellipsometric parameters critically depend on the states of polarization, nanorod angular arrangement and specific illumination-observation geometry. SERS polarization and angular dependences of AgOADs were measured using methylene blue (MB) molecule. Our study constitutes, to our knowledge, the most detailed investigation of such characteristics of plasmonic nanostructures to date. This is due to the 90°-scattering geometry used in which two out of three Euler angles determining the nanorod spatial orientation and four polarization combinations can be varied simultaneously. We attributed the anisotropic optical response to anisotropic (pseudo)refractive index caused by different periodicity of our structures in different directions since the plasmonic properties were found rather isotropic. For the first time we demonstrate very good correspondence between SERS intensities and ellipsometric parameters for all measured configurations as compared on the basis of the surface selection rules. Obtained results enable quantitative analysis of MB Raman tensor elements, indicating that the molecules adsorb predominantly with the symmetry axis perpendicular to the surface.

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Section: Resultsmentioning

confidence: 99%

Anisotropic Optical Response of Silver Nanorod Arrays: Surface Enhanced Raman Scattering Polarization and Angular Dependences Confronted with Ellipsometric Parameters

Šubr

Petr

Kylián

et al. 2017

Sci Rep

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“…The Raman effectiveness of SERS substrate was analyzed by characterizing SERS spectra of water diluted methylene blue (MB). The procedure is identical to reference [8] that has previously reported by our group for AAO-based SERS substrates. With no big difference in SERS effectiveness of a newly developed SERS substrate, it is able to reveal several molecular details of the methylene blue adsorbed on substrate surface.…”

Section: Sers Substratementioning

confidence: 88%

Applications of surface-enhanced Raman scattering (SERS) substrate

Nuntawong

Eiamchai

Limwichean

et al. 2015

2015 Asian Conference on Defence Technology (ACDT)

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Threats of explosive, toxic and narcotic substances continue growing importance to a number of places around the world. In many recent cases, the treats are coming from unprecedented well-funded, increasing sophisticated and highly mass propaganda of radical or criminal organizations. These are challenging tasks for the defense agencies to implement new technologies and methods to ramp up intelligence gathering and visibility in order to pinpoint and deactivate the threats at multiple levels. Some of the main challenges are to develop faster, more sensitive, less expensive portable systems to facilitate the ultra-low detection of the targeted chemical compounds for anti terror/criminal purposes. This article is to review the progress of surface-enhanced Raman scattering (SERS) substrate of silver nanorod fabricated by magnetron sputtering technique, developed by our group at NECTEC for defense related applications, which have been published in several previous reports, in order to promote the technique as a major tool for rapid identification of such terror/criminal substances at ultrasensitive levels. Major highlights are trace detection of several toxic organophosphorous compounds, explosives including TNT and commercial explosives and a narcotic drug based onmethamphetamine -at a sensitivity that can compete with, or even better than, conventional methods.

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“…Gold or silver NPs embedded in dielectric matrix by using a variety of techniques like physical vapour deposition (PVD), chemical vapour deposition (CVD) and organic encapsulation, have been reported in studies for their optical and catalytic properties [6][7][8][9]. However, the as-deposited films were usually annealed at high temperatures in order to favour NPs growth and to increase their size [10][11][12].…”

Section: Introductionmentioning

confidence: 99%

Thermal stability of Au–TiO2 nanocomposite films prepared by direct liquid injection CVD

Avril

Bourgeois

Lucas

et al. 2015

Vacuum

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Surface-enhanced Raman scattering substrate of silver nanoparticles depositing on AAO template fabricated by magnetron sputtering

Cited by 67 publications

References 19 publications

Anisotropic Optical Response of Silver Nanorod Arrays: Surface Enhanced Raman Scattering Polarization and Angular Dependences Confronted with Ellipsometric Parameters

Anisotropic Optical Response of Silver Nanorod Arrays: Surface Enhanced Raman Scattering Polarization and Angular Dependences Confronted with Ellipsometric Parameters

Applications of surface-enhanced Raman scattering (SERS) substrate

Thermal stability of Au–TiO2 nanocomposite films prepared by direct liquid injection CVD

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