BS2.3 - Chain-shaped plasmonic crystal for highly sensitive label-free biosensor
- 17th International Meeting on Chemical Sensors - IMCS 2018
2018-07-15 - 2018-07-19
- Biosensors 2
- H. Yamada, D. Kawasaki, S. Aki, K. Maeno, K. Sueyoshi, H. Hisamoto, T. Endo - Osaka Prefecture University, Osaka (Japan)
- 107 - 108
In this study, we designed and fabricated plasmonic crystal (PC) which has chain-shaped periodic metal nanostructures for excitation of the localized surface plasmon resonance (LSPR) at two different wavelength by changing polarization of incident light. PC absorbs light and generates enhanced electric field at specific wavelength depending on the size, shape, thickness, periodicity, and material. Here, we designed the PC consisted of intersectional short and long chain structures for applications using both visible and infrared lights. With this PC, the short chain structure can be used for label-free biosensing based on the detection of surrounding refractive index change by visible light. On the other hand, long chain structure is applicable in molecular collection by gradient force and thermal convection occurred by irradiation of infrared light. Based on these effects of chain shapes, PC structure proposed here is expected to be useful in label-free biosensors for low-concentration analytes in sample solution.