Localized Surface Plasmon Resonance Sensors

Mayer, Kathryn M.; Hafner, Jason H.

doi:10.1021/cr100313v

Cited by 3,599 publications

(3,273 citation statements)

References 156 publications

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“…In addition, Au and Ag nanostructures are relatively stable in ambient environments. They have, therefore, been intensively studied from the perspectives of both fundamental sciences [1][2][3] and potential applications in optics, [4][5][6] sensing, [7][8][9][10] imaging, [ 11 , 12 ] information processing, [ 13 ] photothermal therapeutics, [ 11 , 12 ] solar energy harvesting, [ 14 , 15 ] and photocatalysis. [ 16 , 17 ] Gold nanocrystals, especially Au nanorods, have been widely used as detection agents for analytical and biochemical applications as well as photothermal therapy, [ 11 , 12 ] owing to their chemical stability, synthetically tunable plasmon resonance bands within the visible and near-infrared spectral regions, and facile surface functionalization using thiol-containing molecules.…”

Section: Doi: 101002/adma201201896mentioning

confidence: 99%

Unraveling the Evolution and Nature of the Plasmons in (Au Core)–(Ag Shell) Nanorods

et al. 2012

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Evolution of the sizes and plasmonic properties of (Au core)−(Ag shell) nanorods is studied. Four plasmon bands are observed on the core−shell nanorods and their properties are investigated. The lowest‐energy one belongs to the longitudinal dipolar plasmon mode, the second‐lowest‐energy one belongs to the transverse dipolar plasmon mode, and the two highest‐energy ones are ascribed to octupolar plasmon modes.

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Section: Doi: 101002/adma201201896mentioning

confidence: 99%

Unraveling the Evolution and Nature of the Plasmons in (Au Core)–(Ag Shell) Nanorods

et al. 2012

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“…The extinction and scattering cross sections arising from Mie's solutions to Maxwell's equations (when the particle is much less than wavelength, λ) are [72]:…”

Section: Physical Foundations For Surface Plasmonsmentioning

confidence: 99%

“…where V is the volume of the particle,ε = ε r + iε i is the complex metal dielectric function, where ε r = n 2 r − n 2 i and ε i = 2n r n i are the real and imaginary parts ofε and n r and n i are the real and imaginary parts of the complex refractive index of the metal, and ε med = n 2 m is the dielectric function of the medium [72].…”

Section: Physical Foundations For Surface Plasmonsmentioning

confidence: 99%

“…For other shapes, however, analytical solutions are not available [72] and they must be studied numerically or via plasmon hybridization theory. The advent of plasmon hybridisation theory [75] in 2003 has made it easier to analytically describe plasmon modes in a range of exotic nanostructures, from nanoshells [75], to nanorice [76], to nanotubes with dielectric cores [77].…”

Section: Physical Foundations For Surface Plasmonsmentioning

confidence: 99%

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Plasmas meet plasmonics

2012

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Abstract. The term 'plasmon' was first coined in 1956 to describe collective electronic oscillations in solids which were very similar to electronic oscillations/surface waves in a plasma discharge (effectively the same formulae can be used to describe the frequencies of these physical phenomena). Surface waves originating in a plasma were initially considered to be just a tool for basic research, until they were successfully used for the generation of large-area plasmas for nanoscale materials synthesis and processing. To demonstrate the synergies between 'plasmons' and 'plasmas', these large-area plasmas can be used to make plasmonic nanostructures which functionally enhance a range of emerging devices. The incorporation of plasmafabricated metal-based nanostructures into plasmonic devices is the missing link needed to bridge not only surface waves from traditional plasma physics and surface plasmons from optics, but also, more topically, macroscopic gaseous and nanoscale metal plasmas. This article first presents a brief review of surface waves and surface plasmons, then describe how these areas of research may be linked through Plasma Nanoscience showing, by closely looking at the essential physics as well as current and future applications, how everything old, is new, once again.

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“…Addressing the challenge will also bring the limits of detection to sub‐femtomolar concentrations 17. A nanostructure having a localized distribution of electric field, or a hot spot, can be targeted as a biorecognition site by hybridizing with nanoparticles to form hetero assemblies at a controlled interparticle gap 18, 19, 20.…”

Section: Introductionmentioning

confidence: 99%

Contact Transfer Printing of Side Edge Prefunctionalized Nanoplasmonic Arrays for Flexible microRNA Biosensor

et al. 2015

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For a nanoplasmonic approach of wearable biochip platform, understanding correlation between near‐field enhancement on nanostructures and sensing capability is a crucial step to improve the sensitivity in biosensing. A novel and effective method is demonstrated to increase sensitivity with the enhanced electric fields and to reduce noise with targeted functionalization enabled by transferring side edge prefunctionalized (SEPF) nanostructure arrays onto flexible substrates. Nanostructure sidewalls have selective biochemically functional terminals for the hybridization of microRNAs (miRNAs) and the immobilization of resonant nanoparticles, thus forming hetero assemblies of the nanostructure and the nanoparticles. The unique configuration has shown ultrasensitive biosensing of miRNA‐21 in a 10 × 10−15 m level by a red‐shift in scattering spectra induced by a plasmon coupling. This ultrasensitive SEPF nanostructure arrays are fabricated on a flexible substrate using a contact transfer printing with a release layer of trichloro(1H, 1H, 2H, 2H‐perfluorooctyl)silane. The introduction of the release layer at a prefunctionalizing step has proven to provide selective functionalization only on the sidewalls of the nanostructures. This reduces a background noise caused by the scattering from nonspecifically bound nanoparticles on the substrate, thus enabling reliable and precise detection.

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Localized Surface Plasmon Resonance Sensors

Cited by 3,599 publications

References 156 publications

Unraveling the Evolution and Nature of the Plasmons in (Au Core)–(Ag Shell) Nanorods

Unraveling the Evolution and Nature of the Plasmons in (Au Core)–(Ag Shell) Nanorods

Plasmas meet plasmonics

Contact Transfer Printing of Side Edge Prefunctionalized Nanoplasmonic Arrays for Flexible microRNA Biosensor

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