Plasmon resonance tuning in metal nanostars for surface enhanced Raman scattering

Chirumamilla, Manohar; Gopalakrishnan, Anisha; Toma, Andréa; Zaccaria, Remo Proietti; Krahne, Roman

doi:10.1088/0957-4484/25/23/235303

Cited by 54 publications

(38 citation statements)

References 52 publications

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“…The Ag rings show an absorption peak in the NIR at 6153 cm -1 , which were slightly different in a previous report. 38 A difference in band position between the previous (6134 cm -1 ) and the present results might have originated from the much smaller Ag rings than those in the previous report as well as the bimetallic (Pd-Ag core-shell) configuration in the present process.…”

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confidence: 97%

An aerosol-based soft lithography to fabricate nanoscale silver dots and rings for spectroscopic applications

2015

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Site-selective deposition of aerosol Pd nanoparticles on a substrate was employed to fabricate nanoscale Ag dots and rings through a subsequent electroless deposition. The fabricated nanoscale dot and ring arrays respectively showed properties in surface-enhanced Raman (SER, with a 1.8 × 10(5) enhancement factor) and Fourier transform near infrared (FT-NIR, at 6153 cm(-1) absorption band) spectra.

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confidence: 97%

An aerosol-based soft lithography to fabricate nanoscale silver dots and rings for spectroscopic applications

2015

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“…The fabrication of GNS arrays by means of electron beam lithography, in which the plasmon resonance energy can be tuned via the nanostar size from the visible into the NIR region, was also reported [ 50 ]. In a second publication of the same research group plasmonic nanostar-dimers, decoupled from the substrate, have been fabricated by combining electron-beam lithography and reactive-ion etching techniques [ 51 ].…”

Section: Synthesis Of Gold Nanostars: An Overview Of Synthetic Stratementioning

confidence: 99%

Gold Nanostar Synthesis and Functionalization with Organic Molecules

Pallavicini

Cabrini

Borzenkov

2015

SpringerBriefs in Materials

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“…Various nanofabrication methods, applying both bottom-up and top-down approaches, have been used to fabricate SERS-based platforms for sensing applications [38][39][40][41][42][43][44][45][46]. Among them, colloidal techniques provide a wide variety of nanoparticles with sharp protrusions, although they are still suffering for poor control over uniformity and arrangement [35].…”

Section: Introductionmentioning

confidence: 99%

Engineering 3D Multi-Branched Nanostructures for Ultra- Sensing Applications

Chirumamilla¹,

Chirumamilla²,

Roberts³

et al. 2018

Raman Spectroscopy

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The fabrication of plasmonic nanostructures with sub-10 nm gaps supporting extremely large electric field enhancement (hot-spot) has attained great interest over the past years, especially in ultra-sensing applications. The "hot-spot" concept has been successfully implemented in surface-enhanced Raman spectroscopy (SERS) through the extensive exploitation of localized surface plasmon resonances. However, the detection of analyte molecules at ultra-low concentrations, i.e., down to the single/few molecule level, still remains an open challenge due to the poor localization of analyte molecules onto the hot-spot region. On the other hand, three-dimensional nanostructures with multiple branches have been recently introduced, demonstrating breakthrough performances in hot-spot-mediated ultra-sensitive detection. Multi-branched nanostructures support high hot-spot densities with large electromagnetic (EM) fields at the interparticle separations and sharp edges, and exhibit excellent uniformity and morphological homogeneity, thus allowing for unprecedented reproducibility in the SERS signals. 3D multi-branched nanostructures with various configurations are engineered for high hot-spot density SERS substrates, showing an enhancement factor of 10 11 with a low detection limit of 1 fM. In this view, multi-branched nanostructures assume enormous importance in analyte detection at ultra-low concentrations, where the superior hot-spot density can promote the identification of probe molecules with increased contrast and spatial resolution.

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Plasmon resonance tuning in metal nanostars for surface enhanced Raman scattering

Cited by 54 publications

References 52 publications

An aerosol-based soft lithography to fabricate nanoscale silver dots and rings for spectroscopic applications

An aerosol-based soft lithography to fabricate nanoscale silver dots and rings for spectroscopic applications

Gold Nanostar Synthesis and Functionalization with Organic Molecules

Engineering 3D Multi-Branched Nanostructures for Ultra- Sensing Applications

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