Special Issue "Metallic Nanostructures for Surface Enhanced Raman Scattering (SERS)"

A special issue of Nanomaterials (ISSN 2079-4991).

Deadline for manuscript submissions: 20 November 2020.

Special Issue Editor

Dr. Sung-Gyu Park
Website
Guest Editor
Advanced Nano-Surface Department (ANSD), Korea Institute of Materials Science (KIMS), Changwon, Gyeongnam 51508, Korea
Interests: Plasmonics; SERS; Biosensors; Point-of-Care Testing; Plasmon-Enhanced Fluorescence; Surface Chemistry

Special Issue Information

Dear Colleagues,

Plasmonic nanomaterials including metallic nanoparticles or nanostructures have attracted a great deal of attention over the past two decades or more due to their unique optical properties, and have been used for a wide range of applications including surface-enhanced Raman scattering (SERS)-based sensors, super-resolution bioimaging, plasmonic photocatalysis and plasmonic chemistry, etc. In the early days of the field’s development, Ag and Au nanomaterials were intensively studied. In recent years, emerging nanomaterials of other metals or semiconductors (e.g., Cu, Pt, and 2D materials) have become readily available. With this background, many researchers have worked toward practical developments in SERS-based sensors using various kinds of plasmonic nanomaterials.

This Special Issue of Nanomaterials will attempt to cover the recent advancements in unique plasmonic nanostructures and SERS-based sensing applications, including chemical and biological (i.e., DNA and protein) sensors.

Dr. Sung-Gyu Park
Guest Editor

Manuscript Submission Information

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Keywords

  • Plasmonics
  • Plasmonic Nanogap
  • Metals
  • SERS
  • Sensors
  • Nanostructures
  • Localized Surface Plasmon Resonance
  • Sensitivity

Published Papers (1 paper)

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Research

Open AccessArticle
Quasi-3D Plasmonic Nanowell Array for Molecular Enrichment and SERS-Based Detection
Nanomaterials 2020, 10(5), 939; https://doi.org/10.3390/nano10050939 - 14 May 2020
Abstract
We report on a quasi-three-dimensional (3D) plasmonic nanowell array with high structural uniformity for molecular detection. The quasi-3D plasmonic nanowell array was composed of periodic hexagonal Au nanowells whose surface is densely covered with gold nanoparticles (Au NPs), separated by an ultrathin dielectric [...] Read more.
We report on a quasi-three-dimensional (3D) plasmonic nanowell array with high structural uniformity for molecular detection. The quasi-3D plasmonic nanowell array was composed of periodic hexagonal Au nanowells whose surface is densely covered with gold nanoparticles (Au NPs), separated by an ultrathin dielectric interlayer. The uniform array of the Au nanowells was fabricated by nanoimprint lithography and deposition of Au thin film. A self-assembled monolayer (SAM) of perfluorodecanethiol (PFDT) was coated on the Au surface, on which Au was further deposited. Interestingly, the PFDT-coated Au nanowells were fully covered with Au NPs with an ultra-high density of 375 μm−2 rather than a smooth film due to the anti-wetting property of the low-energy surface. The plasmonic nanogaps formed among the high-density Au NPs led to a strong near-field enhancement via coupled localized surface plasmon resonance and produced a uniform surface-enhanced Raman spectroscopy (SERS) response with a small relative standard deviation of 5.3%. Importantly, the highly uniform nanostructure, featured by the nanoimprint lithography and 3D growth of densely-packed Au NPs, minimizes the spatial variation of Raman intensity, potentially providing quantitative analysis. Moreover, analyte molecules were highly concentrated and selectively deposited in nanowells when a water droplet containing the analyte was evaporated on the plasmonic substrate. The analyte formed a relatively thick overcoat in the nanowells near the triple line due to the coffee-ring effects. Combining 3D plasmonic nanowell substrates with molecular enrichments, highly sensitive detection of lactic acid was demonstrated. Given its combination of high sensitivity and signal uniformity, the quasi-3D plasmonic nanowell substrate is expected to provide a superior molecular detection platform for biosensing applications. Full article
(This article belongs to the Special Issue Metallic Nanostructures for Surface Enhanced Raman Scattering (SERS))
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