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Preparation of 2D Periodic Nanopatterned Arrays through Vertical Vibration-Assisted Convective Deposition for Application in Metal-Enhanced Fluorescence
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Document Title
Preparation of 2D Periodic Nanopatterned Arrays through Vertical Vibration-Assisted Convective Deposition for Application in Metal-Enhanced Fluorescence
Author
Dhanasiwawong K, Thamaphat K, Horprathum M, Klamchuen A, Phetsahai A, Limsuwan P
Name from Authors Collection
Affiliations
King Mongkuts University of Technology Thonburi; King Mongkuts University of Technology North Bangkok; King Mongkuts University of Technology Thonburi; National Science & Technology Development Agency - Thailand; National Electronics & Computer Technology Center (NECTEC); National Science & Technology Development Agency - Thailand; National Nanotechnology Center (NANOTEC)
Type
Article
Source Title
PROCESSES
Year
2022
Volume
10
Issue
2
Open Access
gold
Publisher
MDPI
DOI
10.3390/pr10020202
Format
Abstract
The performance of a metal-enhanced fluorescence (MEF) substrate is fundamentally based on the orientation of the metal nanostructures on a solid substrate. In particular, two-dimensional (2D) periodic metallic nanostructures exhibit a strong confinement of the electric field between adjacent nanopatterns due to localized surface plasmon resonance (LSPR), leading to stronger fluorescence intensity enhancement. The use of vertical vibration-assisted convective deposition, a novel, simple, and highly cost-effective technique for preparing the 2D periodic nanostructure of colloidal particles with high uniformity, was therefore proposed in this work. The influences of vertical vibration amplitude and frequency on the structure of thin colloidal film, especially its uniformity, monolayer, and hexagonal close-packed (HCP) arrangement, were also investigated. It was found that the vibration amplitude affected film uniformity, whereas the vibration frequency promoted the colloidal particles to align themselves into defect-free HCP nanostructures. Furthermore, the results showed that the self-assembled 2D periodic arrays of monodisperse colloidal particles were employed as an excellent template for a Au thin-film coating in order to fabricate an efficient MEF substrate. The developed MEF substrate provided a strong plasmonic fluorescence enhancement, with a detection limit for rhodamine 6G as low as 10(-9) M. This novel approach could be advantageous in further applications in the area of plasmonic sensing platforms.
Industrial Classification
Knowledge Taxonomy Level 1
Knowledge Taxonomy Level 2
Knowledge Taxonomy Level 3
Funding Sponsor
Petchra Pra Jom Klao Master's Degree Scholarship from King Mongkut's University of Technology Thonburi (KMUTT), Thailand [40/2561]; National Electronic and Computer Technology Center [P1952720, P2050221]
License
CC-BY
Rights
Authors
Publication Source
WOS