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Optical Engineering

Localized surface plasmon resonance in two-dimensional silver nanodot array fabricated using nanoporous alumina mask for chemical sensor platform
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Paper Abstract

Two-dimensional (2-D) metal nanodot arrays (NDAs) have been attracting significant attention for use in biological and chemical sensing applications. The unique optical properties of the metal NDAs originate from their localized surface plasmon resonance (LSPR). Nanofabrication methods that use nanoporous alumina masks (NAMs) have been widely used to produce metal NDAs. We report a fabrication technique for a 2-D Ag NDA and its utilization as a platform for LSPR-based sensing applications. A well-ordered Ag NDA of ∼70-nm diameter, arranged in a periodic pattern of 105 nm, was fabricated on an indium tin oxide (ITO) glass substrate using an NAM as an evaporation mask. The LSPR of the Ag NDA on the ITO glass was investigated using ultraviolet–visible spectroscopy. The LSPR wavelength shifts caused by the variations in the quantity of methylene blue adsorbed on the Ag NDA were examined. The results of this study suggest that the Ag NDA prepared using NAM can be used as a chemical sensor platform.

Paper Details

Date Published: 19 August 2016
PDF: 8 pages
Opt. Eng. 55(8) 087107 doi: 10.1117/1.OE.55.8.087107
Published in: Optical Engineering Volume 55, Issue 8
Show Author Affiliations
Mi Jung, Chung-Ang Univ. (Republic of Korea)
Myung-Gi Ji, Chung-Ang Univ. (Republic of Korea)
Tae-Ryong Kim, Chung-Ang Univ. (Republic of Korea)
Cheol-Hwee Shim, Korea Institute of Science and Technology (Republic of Korea)
Seok Lee, Korea Institute of Science and Technology (Republic of Korea)
Deokha Woo, Korea Institute of Science and Technology (Republic of Korea)
Young-Wan Choi, Chung-Ang Univ. (Korea, Republic of)

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