21 April 2016 Sensing characteristics of plasmonic structure based on transferring process of polystyrene nano-beads
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Abstract
We analyzed and demonstrated the double layered metallic nano-structures using polystyrene lift-off process on the conventional surface plasmon resonance (SPR) sensor to enhance the sensitivity of an SPR surface. The double layered plasmonic structures are optimized using the three-dimensional finite-difference time-domain method for the width, thickness, and period of the polystyrene beads. The thickness of the metal film and the metallic nano-hole is 20 and 20 nm in the 305 nm wide nano-hole size, respectively. The double layered metallic nano-structures are fabricated with monolayer polystyrene beads of chloromethyl latex 4% w/v 0.4 μm. The sensitivities of the conventional SPR sensor and the double layered plasmonic sensor are obtained to 42.2 and 60 degree/RIU, respectively. The SPR devices are also applied to the lead ion sensor. The resonance shifts of SPR sensors with and without a poly(vinyl chloride) membrane are 1328 RU and 788 RU from 10-5 M to 10-2 M concentration, respectively.
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Doo Gun Kim, Doo Gun Kim, Jeongwoo Hwang, Jeongwoo Hwang, Seon Hoon Kim, Seon Hoon Kim, Hyun Chul Ki, Hyun Chul Ki, Tae Un Kim, Tae Un Kim, Jae Cheol Shin, Jae Cheol Shin, Dae-Cheol Jeong, Dae-Cheol Jeong, Seungwon Jeon, Seungwon Jeon, Hong-Seung Kim, Hong-Seung Kim, Young-Wan Choi, Young-Wan Choi, } "Sensing characteristics of plasmonic structure based on transferring process of polystyrene nano-beads", Proc. SPIE 9884, Nanophotonics VI, 98842S (21 April 2016); doi: 10.1117/12.2227468; https://doi.org/10.1117/12.2227468
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