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제109회 대한화학회 학술발표회, 총회 및 기기전시회 안내 Au triangular-shaped nanostructure For Sensitivity Enhancement of Surface Plasmon Resonance Sensor

2012년 2월 16일 15시 18분 49초
MAT.P-1152 이곳을 클릭하시면 발표코드에 대한 설명을 보실 수 있습니다.
4월 25일 (수요일) 18:00~21:00
저자 및
성소희, 김효섭, 김재호
아주대학교 분자과학기술학과, Korea
The Surface Plasmon Resonance (SPR) can be used to analyze the real-time response to the changes in surface properties on a metallic film. SPR has been widely employed for biosensor applications because of the capability for label-free detection of biomolecular interactions. Nanosphere lithography (NSL) is an inexpensive, simple to implement, inherently parallel, high throughput, materials general nanofabrication technique capable of producing an unexpectedly large variety of nanoparticle structures and well-ordered 2D nanoparticle arrays. In this study, we used Au triangular-shaped nanostructure for SPR sensitivity enhancement. The Au based thin film was evaporated by sputter on the flat 18×18 mm2 cover glass substrates. Periodic particle array surfaces have been prepared using identical single-layer Nanosphere lithography (NSL) masks made by Langmuir-Blodgett (LB) method of silica nanospheres with a variety of diameter(D = 150, 300, and 500). The Au nanostructured SPR chip was fabricated by e-beam evaporation on the Au based thin film substrates. The Au nanostructured SPR chips showed a remarkable shift of resonance angle for analytes such as water and ethanol aqueous solution compared with that of conventional Au chip. The peaks of near resonance angle were widened especially when 150 nm sized silica particle template based chip was used. In comparison to conventional flat Au chips, sensitivity enhancement was up to 120% on the 150 nm sized silica particle template based chip. The tendency for the sensitivity enhancement change in bulky refractive index remains the same as previous Au nanostructured SPR researches.