A New Type of Nano-Porous Gold Membrane for Surface Plasmon Resonance Biosensor
YANG Yin1, 2, WU Yi-hui1*, HAO Peng1, ZHANG Zhi-qiang1, 2
1. National Key Lab of Applied Optics, Changchun Institute of Optics, Fine Mechanics and Physics, Chinese Academy of Sciences, Changchun 130033, China 2. Graduate University of Chinese Academy of Sciences, Beijing 100049, China
Abstract：Nano-porous gold membrane was fabricated by chemical etching method in the present work. The structures and the unique optical properties of the membrane were studied by scanning electron microscope and spectrometer. We creatively used the nano-porous gold membrane as the sensing layer for surface plasmon resonance biosensor. The results showed that, compared to the traditional evaporated gold film, the nano-porous gold membrane has a unique effect of localized surface plasmon resonance. The sensitivity of detecting the biological agents was obviously increased by the surface plasmon resonance biosensor assembling the nano-porous gold membrane. The fabrication method of the nano-porous gold membrane is simple and low-cost, so it absolutely can replace the use of traditional evaporated gold film.
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