Influence of the Evanescent Field Decay Length on the Sensitivity of Plasmonic Nanodisks and Nanoholes

Mazzotta, Francesco; Johnson, Timothy W.; Dahlin, Andreas; Shaver, Jonah; Oh, Sang Hyun; Höök, Fredrik

doi:10.1021/ph500360d

Cited by 98 publications

(98 citation statements)

References 58 publications

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“…In order to avoid the fluorescence quenching effect, silicon oxidation film also introduced as a spacer layer to separate the fluorescent molecule from the substrate [42]. Recently, a periodical nanostructure with nanohole arrays formed in continued silver films was fabricated with template-stripping technique first and then with an atomic layer deposition grown oxide layer on it, such as silica shell or alumina, to prevent fluorophore quenching [43,44].…”

Section: Pef From Nanohole Array Substratementioning

confidence: 99%

Recent Progress on Plasmon-Enhanced Fluorescence

et al. 2015

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Abstract:The optically generated collective electron density waves on metal-dielectric boundaries known as surface plasmons have been of great scientific interest since their discovery. Being electromagnetic waves on gold or silver nanoparticle's surface, localised surface plasmons (LSP) can strongly enhance the electromagnetic field. These strong electromagnetic fields near the metal surfaces have been used in various applications like surface enhanced spectroscopy (SES), plasmonic lithography, plasmonic trapping of particles, and plasmonic catalysis. Resonant coupling of LSPs to fluorophore can strongly enhance the emission intensity, the angular distribution, and the polarisation of the emitted radiation and even the speed of radiative decay, which is so-called plasmon enhanced fluorescence (PEF). As a result, more and more reports on surface-enhanced fluorescence have appeared, such as SPASER-s, plasmon assisted lasing, single molecule fluorescence measurements, surface plasmoncoupled emission (SPCE) in biological sensing, optical orbit designs etc. In this review, we focus on recent advanced reports on plasmon-enhanced fluorescence (PEF). First, the mechanism of PEF and early results of enhanced fluorescence observed by metal nanostructure will be introduced. Then, the enhanced substrates, including periodical and nonperiodical nanostructure, will be discussed and the most important factor of the spacer between molecule and surface and wavelength dependence on PEF is demonstrated. Finally, the recent progress of tipenhanced fluorescence and PEF from the rare-earth doped up-conversion (UC) and down-conversion (DC) nanoparticles (NPs) are also commented upon. This review provides an introduction to fundamentals of PEF, illustrates the current progress in the design of metallic nanostructures for efficient fluorescence signal amplification that utilises propagating and localised surface plasmons.

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Section: Pef From Nanohole Array Substratementioning

confidence: 99%

Recent Progress on Plasmon-Enhanced Fluorescence

et al. 2015

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“…When incident light excites conduction band electrons in a metallic nanostructure, a surface plasmon resonance (SPR) can be generated which gives rise to tightly confined optical fields that can be utilized in biosensing . Sensing benefits include short and tunable evanescent field decay length, high sensitivity, and simple optical configuration . Among different nanostructures, periodic nanohole arrays exhibit particularly intense resonances at specific wavelengths based on extraordinary optical transmission .…”

Section: Methodsmentioning

confidence: 99%

“…Figure a presents an SEM image of a periodic gold nanohole array with 160 nm hole diameter and 500 nm periodicity template‐stripped using optical adhesive (Norland, NOA 61) and a glass substrate . The nanohole diameter and array periodicity are suitable for efficient coupling to plasmon modes at visible wavelengths . The top surface and sidewalls of the holes are gold while the bottom surface is cured optical adhesive.…”

mentioning

confidence: 99%

Plasmonic Nanohole Sensor for Capturing Single Virus‐Like Particles toward Virucidal Drug Evaluation

Jackman

Linardy

Yoo

et al. 2015

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A plasmonic nanohole sensor for virus-like particle capture and virucidal drug evaluation is reported. Using a materials-selective surface functionalization scheme, passive immobilization of virus-like particles only within the nanoholes is achieved. The findings demonstrate that a low surface coverage of particles only inside the functionalized nanoholes significantly improves nanoplasmonic sensing performance over conventional nanohole arrays.

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“…In contrast, in plasmonic nanostructures, the EM field is highly confined close to the surface, with an average sensitive area that expands a few nanometers away from the surfaces [15]. The size of the biomolecules (receptors immobilized and target analyte), the thickness of the bioactive layer, and the decay length of the evanescent field of the nanostructure [16] are, therefore, important factors to tune the final surface sensitivity. Moreover, the EM field confinement makes LSPR less susceptible to bulk changes occurring in the media such as temperature fluctuations and more sensitive to smaller targets at lower concentrations.…”

Section: Introductionmentioning

confidence: 99%

Recent advances in nanoplasmonic biosensors: applications and lab-on-a-chip integration

et al. 2016

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Abstract:Motivated by the recent progress in the nanofabrication field and the increasing demand for cost-effective, portable, and easy-to-use point-of-care platforms, localized surface plasmon resonance (LSPR) biosensors have been subjected to a great scientific interest in the last few years. The progress observed in the research of this nanoplasmonic technology is remarkable not only from a nanostructure fabrication point of view but also in the complete development and integration of operative devices and their application. The potential benefits that LSPR biosensors can offer, such as sensor miniaturization, multiplexing opportunities, and enhanced performances, have quickly positioned them as an interesting candidate in the design of lab-on-a-chip (LOC) optical biosensor platforms. This review covers specifically the most significant achievements that occurred in recent years towards the integration of this technology in compact devices, with views of obtaining LOC devices. We also discuss the most relevant examples of the use of the nanoplasmonic biosensors for real bioanalytical and clinical applications from assay development and validation to the identification of the implications, requirements, and challenges to be surpassed to achieve fully operative devices.

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Influence of the Evanescent Field Decay Length on the Sensitivity of Plasmonic Nanodisks and Nanoholes

Cited by 98 publications

References 58 publications

Recent Progress on Plasmon-Enhanced Fluorescence

Recent Progress on Plasmon-Enhanced Fluorescence

Plasmonic Nanohole Sensor for Capturing Single Virus‐Like Particles toward Virucidal Drug Evaluation

Recent advances in nanoplasmonic biosensors: applications and lab-on-a-chip integration

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