Moving Nanoparticles with Raman Scattering

Ringler, Moritz; Klar, Thomas A.; Schwemer, A.; As, Susha; Stehr, Joachim; Raschke, G.; Funk, Stefan; Borowski, Michael; Nichtl, Alfons; Kürzinger, Konrad; Rt, Phillips; Feldmann, Jochen

doi:10.1021/nl0712466

Cited by 71 publications

(68 citation statements)

References 32 publications

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“…After the second drop, we observed smaller BSA-induced shifts than for the isolated MN case (Figure 4), as a consequence of reduced mode extension away from the gap and the inability of the BSA molecules to now penetrate into this area due to size exclusion. 29 At this stage, it is hard to provide a reliable value for the limit of detection of our system. While there exists an analytical model to assess the sensitivity of SPR sensors based on extended metal films, its reliability for LSPR sensors is restricted to unpolarized illumination and/or symmetric shapes and arrangements of MNs.…”

Section: Resultsmentioning

confidence: 99%

Plasmon Near-Field Coupling in Metal Dimers as a Step toward Single-Molecule Sensing

et al. 2009

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In this study, we report on ultrasensitive protein detection with lithographically prepared plasmonic nanostructures. We have engineered optical nanosensors by the combined approach of negative resist, electron beam lithography, and reactive ion etching to form highly reproducible arrays of gold dimers in which the near-field coupling in their subwavelength gap enables for scaling the sensing volume down to the single-protein scale. In good agreement with recent theoretical predictions, the dimer geometry offers enhanced sensitivity compared to isolated particles for the detection of both small organic molecules and proteins. Beyond, by exploiting size exclusion, we are capable of monitoring the number of proteins able to bind across the gap region through the precise engineering of the structures coupled to the selective binding of a surface-assembled monolayer and covalent attachment of the protein.

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Section: Resultsmentioning

confidence: 99%

Plasmon Near-Field Coupling in Metal Dimers as a Step toward Single-Molecule Sensing

et al. 2009

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“…While near-fields around single NPs can be strongly enhanced, the near-fields in the gaps between NPs can be enhanced by several additional orders of magnitude due to the interaction between the particles. Such "hot spots" are key to many applications in field-enhanced microscopy, spectroscopy, sensing, and manipulation [10,185,186]. The concept of plasmon hybridization [187,188] provides a simple way to understand coupling between plasmons.…”

Section: Coupled Plasmonsmentioning

confidence: 99%

Metal‐nanoparticle plasmonics

Pelton

Aizpurua

Bryant³

2008

Laser & Photonics Reviews

700

641

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The rapid emergence of nanoplasmonics as a novel technology has been driven by recent progress in the fabrication, characterization, and understanding of metal-nanoparticle systems. In this review, we highlight some of the key advances in each of these areas. We emphasize the basic physical understanding and experimental techniques that will enable a new generation of applications in nano-optics. Abstract The rapid emergence of nanoplasmonics as a novel technology has been driven by recent progress in the fabrication, characterization, and understanding of metal-nanoparticle systems. In this review, we highlight some of the key advances in each of these areas. We emphasize the basic physical understanding and experimental techniques that will enable a new generation of applications in nano-optics.Critical areas driving the emergence of metal-nanoparticle plasmonics: fabrication, characterization, and theory.

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“…60,61 These coupled plasmon resonances are spectrally red-shied and give rise to large eld enhancements in between the particles which are benecial for the enhancement of low cross section processes such as Raman scattering. [62][63][64] Coupled plasmon resonances in an optical trap can be observed spontaneously, if two or more plasmonic particles diffuse into the focal region and are trapped together ( Fig. 3b and c).…”

Section: Coupling Of Plasmonic Particlesmentioning

confidence: 99%

Optical trapping and manipulation of plasmonic nanoparticles: fundamentals, applications, and perspectives

et al. 2014

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This feature article discusses the optical trapping and manipulation of plasmonic nanoparticles, an area of current interest with potential applications in nanofabrication, sensing, analytics, biology and medicine. We give an overview over the basic theoretical concepts relating to optical forces, plasmon resonances and plasmonic heating. We discuss fundamental studies of plasmonic particles in optical traps and the temperature profiles around them. We place a particular emphasis on our own work employing optically trapped plasmonic nanoparticles towards nanofabrication, manipulation of biomimetic objects and sensing.

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Moving Nanoparticles with Raman Scattering

Cited by 71 publications

References 32 publications

Plasmon Near-Field Coupling in Metal Dimers as a Step toward Single-Molecule Sensing

Plasmon Near-Field Coupling in Metal Dimers as a Step toward Single-Molecule Sensing

Metal‐nanoparticle plasmonics

Optical trapping and manipulation of plasmonic nanoparticles: fundamentals, applications, and perspectives

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