利用镜像电荷理论研究表面等离激元共振生物传感中的纳米颗粒与基底相互作用。
Investigating nanoparticle-substrate interaction in LSPR biosensing using the image-charge theory.
作者信息
Mortazavi Daryoush, Kouzani Abbas Z, Kaynak Akif
机构信息
School of Engineering, Deakin University, Geelong, VIC, Australia.
出版信息
Annu Int Conf IEEE Eng Med Biol Soc. 2012;2012:2363-6. doi: 10.1109/EMBC.2012.6346438.
Localized surface plasmon resonance (LSPR) has been used to develop optical biosensors. Tuning the resonance wavelength to detect target biomolecules with a particular dipolar resonance is essential when designing LSPR biosensors. In this paper, the interaction of nanoparticles (NPs) with glass substrate (SiO(2)) for LSPR wavelength is investigated using the concept of the image-charge theory. Using the FDTD method, it is shown how the NP and substrate size change the plasmon wavelength. Next, this phenomenon is interpreted using the analytical electrostatic eigenvalue method.
局域表面等离子体共振（LSPR）已被用于开发光学生物传感器。在设计LSPR生物传感器时，将共振波长调谐以检测具有特定偶极共振的目标生物分子至关重要。本文利用镜像电荷理论的概念研究了纳米颗粒（NP）与用于LSPR波长的玻璃基板（SiO₂）之间的相互作用。使用时域有限差分（FDTD）方法，展示了NP和基板尺寸如何改变等离子体波长。接下来，使用解析静电特征值方法对这一现象进行解释。
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