Elevated surface plasmon resonance sensing sensitivity of Au-covered silica sphere monolayer prepared by Langmuir-Blodgett coatingElevated surface plasmon resonance sensing sensitivity of Au-covered silica sphere monolayer prepared by Langmuir–Blodgett coating
- Other Titles
- Elevated surface plasmon resonance sensing sensitivity of Au-covered silica sphere monolayer prepared by Langmuir–Blodgett coating
- Authors
- Choi, Baeck B.; Kim, Bethy; Chen, Yiqi; Yoo, Sung Jong; Cho, Younghyun; Jiang, Peng
- Issue Date
- 25-Jul-2021
- Publisher
- 한국공업화학회
- Keywords
- Surface plasmon resonance (SPR); Plasmonics; Nanostructure; Colloidal self-assembly; AuFON; FDTD
- Citation
- Journal of Industrial and Engineering Chemistry, v.99, pp 179 - 186
- Pages
- 8
- Journal Title
- Journal of Industrial and Engineering Chemistry
- Volume
- 99
- Start Page
- 179
- End Page
- 186
- URI
- https://scholarworks.bwise.kr/sch/handle/2021.sw.sch/18695
- DOI
- 10.1016/j.jiec.2021.04.026
- ISSN
- 1226-086X
1876-794X
- Abstract
- The colloidal Langmuir & ndash;Blodgett coating process is used to fabricate Au-covered silica sphere monolayer (Au film over silica nanosphere (AuFON)) and study the effects of silica diameter on surface plasmon resonance (SPR) sensing sensitivity. The resulting hexagonal close-packed (HCP) monolayers are prepared with silica sphere diameters of 200, 400, 700, and 1000 nm. In SPR sensing applications, the optical properties of Au-covered silica sphere monolayer are evaluated by measuring normal-incidence reflection spectra and sensing tests. The high sensitivity (nm/RIU) is observed in silica sphere diameter (1000 > 700 > 400 > 200 nm) and plasmon mode (dipole > Fano resonance (FR) > and high order) while the highest sensitivity is 968 nm/RIU (dipole mode, 1000 nm of silica sphere diameter). 3-D Finite Difference Time Domain (FDTD) simulation shows a sensitivity trend similar to the experimental results. (c) 2021 The Korean Society of Industrial and Engineering Chemistry. Published by Elsevier B.V. All rights reserved.
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