Antisymmetric plasmon resonance in coupled gold nanoparticles as a sensitive tool for detection of local index of refraction
Alexander N. Grigorenko,Helen F. Gleeson,Y. Zhang,Nicholas W. Roberts,A. R. Sidorov,A. A. Panteleev +5 more
TLDR
In this article, a nanofabricated regular array of coupled gold nanopillars is employed to detect local indices of refraction of different liquids using a shift of an antisymmetric plasmon resonance peak observed in the reflection spectra.Abstract:
A nanofabricated regular array of coupled gold nanopillars is employed to detect local indices of refraction of different liquids using a shift of an antisymmetric plasmon resonance peak observed in the reflection spectra. The peak’s spectral position is found to be a unique function of the local refractive index for a wide range of indices. We discuss possible applications of the fabricated nanostructured arrays in bio- and chemical sensors.read more
Citations
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Nanometric optical tweezers based on nanostructured substrates
TL;DR: In this article, the first experimental realization of three-dimensional nanometric optical tweezers that are based on nanostructured substrates was reported, which achieved nanoscale control of entities at significantly smaller laser powers and open new avenues for nanomanipulation of fragile biological objects.
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Plasmon near-field coupling in metal dimers as a step toward single-molecule sensing.
TL;DR: This study has 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.
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Sensitivity Improved Surface Plasmon Resonance Biosensor for Cancer Biomarker Detection Based on Plasmonic Enhancement
TL;DR: The development of a nanoparticle-enhanced biosensor by integrating both the nanoparticles and immunoassay sensing technologies into a phase interrogation surface plasmon resonance (SPR) system for detecting antigen at a concentration as low as the femtomolar range is reported.
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Sensitivity of collective plasmon modes of gold nanoresonators to local environment
TL;DR: This work presents what it believes to be the first experimental study of the optical response of collective plasmon resonances in regular arrays of nanoresonators to local environment and shows that the phase sensitivity of the collective resonances can be more than 2 orders of magnitude better than the best amplitude sensitivity ofthe same nanodot array.
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High-Performance Biosensing Using Arrays of Plasmonic Nanotubes
John McPhillips,Antony Murphy,Magnus P. Jonsson,William Hendren,R. Atkinson,Fredrik Höök,Anatoly V. Zayats,Robert Pollard +7 more
TL;DR: It is shown that aligned gold nanotube arrays capable of supporting plasmonic resonances can be used as high performance refractive index sensors in biomolecular binding reactions and have a signal-to-noise ratio better than 1000 upon protein binding.
References
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Single Molecule Detection Using Surface-Enhanced Raman Scattering (SERS)
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A DNA-based Method for Rationally Assembling Nanoparticles Into Macroscopic Materials
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Selective Colorimetric Detection of Polynucleotides Based on the Distance-Dependent Optical Properties of Gold Nanoparticles
TL;DR: A highly selective, colorimetric polynucleotide detection method based on mercaptoalkyloligonucleotide-modified gold nanoparticle probes is reported, which can detect about 10 femtomoles of an oligonucleotide.
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Notizen: Radiative Decay of Non Radiative Surface Plasmons Excited by Light
E. Kretschmann,H. Raether +1 more
TL;DR: In this paper, it has been shown that the non-radiative mode excited by light can also radiate under certain conditions if they are excited by electrons (grazing incidence of electrons on a rough surface or at normal incidence on a grating).