Aluminum Nanoarrays for Plasmon-Enhanced Light Harvesting

Lee, Min-Ah; Kim, Jong Uk; Lee, Ki Joong; Ahn, SooHoon; Shin, Yong‐Beom; Shin, Jonghwa; Park, Chan Beum

doi:10.1021/acsnano.5b01541

Cited by 89 publications

(83 citation statements)

References 44 publications

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“…The ZMW samples are rinsed with ultrapure water and isopropanol and then exposed to oxygen plasma for 5 minutes to remove any remaining organic residues and densify the oxide layer. To protect the aluminum surface and mitigate the corrosion effects, 46,47 together are abbreviated as PODCAT and play the role of an oxygen scavenger 51 that removes a significant fraction of oxygen from the solution and increases photostability and brightness of βgalactosidase, whereas ascorbic acid is introduced as a protein-friendly antioxidant to reduce pH of the solution for the measurement, 52 and help stabilize the aluminum nanostructures. 49 All the aforementioned chemicals are purchased from Sigma Aldrich.…”

Section: Surface Passivationmentioning

confidence: 99%

“…Several reasons contribute to make this a technical challenge: the need for reproducible well-controlled plasmonic structures, the need for a proper characterization approach to deal with the low brightness and photostability of proteins, and the limited stability of aluminum structures in water environment. [46][47][48][49] Here, we report the label-free detection of single β-galactosidase proteins using their natural tryptophan UV fluorescence emission enhanced by plasmonic aluminum nanoapertures. Our experiments are rationally designed to overcome all the previous limitations.…”

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confidence: 99%

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Deep Ultraviolet Plasmonic Enhancement of Single Protein Autofluorescence in Zero-Mode Waveguides

et al. 2019

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Single molecule detection provides detailed information about molecular structures and functions, but it generally requires the presence of a fluorescent marker which can interfere with the activity of the target molecule or complicate the sample production. Detecting a single protein with its natural UV autofluorescence is an attractive approach to avoid all the issues related to fluorescence labelling.However, the UV autofluorescence signal from a single protein is generally extremely weak. Here, we use aluminum plasmonics to enhance the tryptophan autofluorescence emission of single proteins in the UV range. Zero-mode waveguides nanoapertures enable observing the UV fluorescence of single label-free β-galactosidase proteins with increased brightness, microsecond transit times and operation at micromolar concentrations. We demonstrate quantitative measurements of the local concentration, diffusion coefficient and hydrodynamic radius of the label-free protein over a broad range of zero-mode waveguide diameters. While the plasmonic fluorescence enhancement has generated a tremendous interest in the visible and near-infrared parts of the spectrum, this work pushes further the limits of plasmonic-enhanced single molecule detection into the UV range and constitutes a major step forward in our ability to interrogate single proteins in their native state at physiological concentrations.

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Section: Surface Passivationmentioning

confidence: 99%

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confidence: 99%

Deep Ultraviolet Plasmonic Enhancement of Single Protein Autofluorescence in Zero-Mode Waveguides

et al. 2019

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“…Its use as a potentially superior chromatic material relative to organic media for color displays has captured great interest. 6,7,10,14,17,[20][21][22] A range of nanostructures, such as discs, 7 holes, 22 rods, 6 and crosses, 21 have been fabricated and studied, showing localized plasmon tuning for optical filters and other colorimetric applications.…”

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confidence: 99%

Fano Resonant Aluminum Nanoclusters for Plasmonic Colorimetric Sensing

King¹,

Liu²,

Yang³

et al. 2015

ACS Nano

223

179

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Aluminum is an abundant and high-quality material for plasmonics with potential for large-area, low-cost photonic technologies. Here we examine aluminum nanoclusters with plasmonic Fano resonances that can be tuned from the near-UV into the visible region of the spectrum. These nanoclusters can be designed with specific chromaticities in the blue-green region of the spectrum and exhibit a remarkable spectral sensitivity to changes in the local dielectric environment. We show that such structures can be used quite generally for colorimetric localized surface plasmon resonance (LSPR) sensing, where the presence of analytes is detected by directly observable color changes rather than through photodetectors and spectral analyzers. To quantify our results and provide a metric for optimization of such structures for colorimetric LSPR sensing, we introduce a figure of merit based on the color perception ability of the human eye.

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“…New plasmonic materials are attracting a strong interest due to recent advances in nanoplasmonics related to high-temperature applications12, light harvesting34, thermoplasmonics56789, heterogeneous catalysis410, sensing11 and active plasmonics1213. This new trend reduces the supremacy of gold and silver in plasmonics1415161718192021.…”

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confidence: 99%

Plasmonic efficiencies of nanoparticles made of metal nitrides (TiN, ZrN) compared with gold

Lalisse

Tessier

Plain

et al. 2016

Sci Rep

134

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Metal nitrides have been proposed to replace noble metals in plasmonics for some specific applications. In particular, while titanium nitride (TiN) and zirconium nitride (ZrN) possess localized plasmon resonances very similar to gold in magnitude and wavelength, they benefit from a much higher sustainability to temperature. For this reason, they are foreseen as ideal candidates for applications in nanoplasmonics that require high material temperature under operation, such as heat assisted magnetic recording (HAMR) or thermophotovoltaics. This article presents a detailed investigation of the plasmonic properties of TiN and ZrN nanoparticles in comparison with gold nanoparticles, as a function of the nanoparticle morphology. As a main result, metal nitrides are shown to be poor near-field enhancers compared to gold, no matter the nanoparticle morphology and wavelength. The best efficiencies of metal nitrides as compared to gold in term of near-field enhancement are obtained for small and spherical nanoparticles, and they do not exceed 60%. Nanoparticle enlargements or asymmetries are detrimental. These results mitigate the utility of metal nitrides for high-temperature applications such as HAMR, despite their high temperature sustainability. Nevertheless, at resonance, metal nitrides behave as efficient nanosources of heat and could be relevant for applications in thermoplasmonics, where heat generation is not detrimental but desired.

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Aluminum Nanoarrays for Plasmon-Enhanced Light Harvesting

Cited by 89 publications

References 44 publications

Deep Ultraviolet Plasmonic Enhancement of Single Protein Autofluorescence in Zero-Mode Waveguides

Deep Ultraviolet Plasmonic Enhancement of Single Protein Autofluorescence in Zero-Mode Waveguides

Fano Resonant Aluminum Nanoclusters for Plasmonic Colorimetric Sensing

Plasmonic efficiencies of nanoparticles made of metal nitrides (TiN, ZrN) compared with gold

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