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Article

Fabrication of a Plasmonic Nanoantenna Array Using Metal Deposition on Polymer Nanoimprinted Nanodots for an Enhanced Fluorescence Substrate

1
Department of Mechanical Engineering, Chung-Ang University, Seoul 06974, Korea
2
Department of Mechanical System Engineering, Chung-Ang University, Seoul 06974, Korea
3
Department of Computer Science and Engineering, Chung-Ang University, Seoul 06974, Korea
4
Department of Mechanical Engineering, Yanbian University, Yanji 133002, China
*
Author to whom correspondence should be addressed.
Polymers 2021, 13(1), 48; https://doi.org/10.3390/polym13010048
Received: 24 November 2020 / Revised: 15 December 2020 / Accepted: 19 December 2020 / Published: 25 December 2020
(This article belongs to the Special Issue Polymer-Based Sensor)
A simple and cost-effective method is proposed herein for a plasmonic nanoantenna array (PNAA) for the fabrication of metal-enhanced fluorescence (MEF) substrates in which fluorophores interact with the enhanced electromagnetic field generated by a localized surface plasmon to provide a higher fluorescence signal. The PNAA is fabricated by the deposition of a silver (Ag) layer on an ultraviolet (UV) nanoimprinted nanodot array with a pitch of 400 nm, diameter of 200 nm, and height of 100 nm. During deposition, raised Ag nanodisks and a lower Ag layer are, respectively, formed on the top and bottom of the imprinted nanodot array, and the gap between these Ag layers acts as a plasmonic nanoantenna. Since the thickness of the gap within the PNAA is influenced by the thickness of Ag deposition, the effects of the latter upon the geometrical properties of the fabricated PNAA are examined, and the electromagnetic field intensity distributions of PNAAs with various Ag thicknesses are simulated. Finally, the fluorescence enhancement factor (FEF) of the fabricated PNAA MEF substrate is measured using spotted Cy5-conjugated streptavidin to indicate a maximum enhancement factor of ~22× for the PNAA with an Ag layer thickness of 75 nm. The experimental results are shown to match the simulated results. View Full-Text
Keywords: polymer nanoimprinting; plasmonic nanoantenna array; metal-enhanced fluorescence; localized surface plasmon resonance polymer nanoimprinting; plasmonic nanoantenna array; metal-enhanced fluorescence; localized surface plasmon resonance
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MDPI and ACS Style

Kim, J.; Abbas, N.; Lee, S.; Yeom, J.; Asgar, M.A.; Badshah, M.A.; Lu, X.; Kim, Y.K.; Kim, S.-M. Fabrication of a Plasmonic Nanoantenna Array Using Metal Deposition on Polymer Nanoimprinted Nanodots for an Enhanced Fluorescence Substrate. Polymers 2021, 13, 48. https://doi.org/10.3390/polym13010048

AMA Style

Kim J, Abbas N, Lee S, Yeom J, Asgar MA, Badshah MA, Lu X, Kim YK, Kim S-M. Fabrication of a Plasmonic Nanoantenna Array Using Metal Deposition on Polymer Nanoimprinted Nanodots for an Enhanced Fluorescence Substrate. Polymers. 2021; 13(1):48. https://doi.org/10.3390/polym13010048

Chicago/Turabian Style

Kim, Jun, Naseem Abbas, Seongmin Lee, Jeongwoo Yeom, Md A. Asgar, Mohsin A. Badshah, Xun Lu, Young K. Kim, and Seok-Min Kim. 2021. "Fabrication of a Plasmonic Nanoantenna Array Using Metal Deposition on Polymer Nanoimprinted Nanodots for an Enhanced Fluorescence Substrate" Polymers 13, no. 1: 48. https://doi.org/10.3390/polym13010048

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