• Title/Summary/Keyword: 표면 플라즈몬 공명

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Optical Properties of Ag@Fe3O4 Core-Shell Nanoparticles (Ag@Fe3O4 코어-쉘 나노입자의 광학적 특성)

  • Song, Younseong;Koh, Kwangnak;Kim, Kyujung;Lee, Jaebeom
    • Korean Journal of Optics and Photonics
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    • v.28 no.3
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    • pp.97-102
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    • 2017

  • In this paper, we investigate the optical properties of $Ag@Fe_3O_4$ nanoparticles (NPs) composed of a plasmonic core and a magnetic shell. As the $Fe_3O_4$ shell with high refractive index (~2.42) is formed on the surface of the silver NPs having diameter of 60 nm, the wavelength of the localized surface-plasmon resonance (LSPR) is shifted from 420 nm to 650 nm, a so-called "redshift". Furthermore, through the use of three simulation models ($Ag@Fe_3O_4$ NP, $Fe_3O_4$ shell NP, and silver NP), the peak at 410 nm is seen to be the result of scattering by the $Fe_3O_4$ shell with 60 nm thickness, which would be useful in comprehending the complex optics in various nanoscale assemblies using similar NPs.

  • https://doi.org/10.3807/KJOP.2017.28.3.097 인용 PDF KSCI

Implementation of Bio-Sensor with Coupled Plasmon-Waveguide Resonance Profile (결합된 플라즈몬-도파관 공진 구조로 구성된 바이오센서의 구현)

  • Kwang-Chun Ho
    • The Journal of the Institute of Internet, Broadcasting and Communication
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    • v.24 no.1
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    • pp.109-114
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    • 2024

  • The bio-sensing properties of TE and TM guided modes in the coupled plasmon-waveguide resonance (PWR) configuration are investigated. The modal transmission-line theory (MTLT) is used for numerical analysis. The proposed PWR bio-sensor is composed of multi-layered configuration with N pairs of MgF2-Si3N4 layers to enhance the sensitivity of a conventional Ag-based surface plasmon resonance bio-sensor. The angular sensitivity of bio-sensor is numerically analyzed for a wide range of biological solutions (refractive index 1.33~1.37). Furthermore, the availability of sensor to detect cancer cells and blood plasma concentration is evaluated. Finally, the results indicate that the proposed bio-sensor is capable efficiently to detect various kinds of cancer cells and different glucose concentrations in urine.

  • https://doi.org/10.7236/JIIBC.2024.24.1.109 인용 PDF HTML

Surface Plasmon Resonance (바이오센서로서 표면 플라즈몬 공명)

  • 구수진
    • BT NEWS
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    • v.11 no.2
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    • pp.24-34
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    • 2004

  • 센서란 측정 대상물로부터 정보를 검지 또는 측정하여 그 측정량을 인식 가능한 유용한 신호로 변화하는 장치(device)로 정의할 수 있으며, 바이오센서(biosensor)는 생물학적 요소와분석 대상 물질과의 반응에서 나타나는 전기화학적 변화, 열에너지의 변화, 형광 또는 색의 변화 등을 인식 가능한 신호로 변환시켜 주는 장치와 결합하여 제작한 기구를 지칭한다. 바이오센서의 효시는 1962년 포도당을 측정하기 위해 Clark이 dialysis membrane을 이용하여 최초의 Glucose센서를 개발한 이래로 생물공학, 화학공학, 전자공학, 생명공학 및 컴퓨터 공학 등 여러 분야가 접목되면서 급속도로 연구 개발되어 왔다.(중략)

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