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Fabrication of Nano-Structured SPR Chip for Sensitivity Enhancement

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Abstract:

We used the Langmuir-Blodgett (LB) method for preparation of large area, defect-free monolayer silica particle film as a template for the fabrication of nano-structure Au pattern on a conventional Au substrate for Surface Plasmon Resonance (SPR). Well organized, trigonal pyramid shaped Au nano-structures were able to construct on 34 separate chips in one fabrication process. The dimensions of trigonal pyramid nano-structures were precisely controlled by changing the particle size of the silica LB template. The nano-structure Au patterned SPR chips provides the enhancement of sensitivity in SPR analysis. The sensitivity enhancement of nano-structure patterned chips was evaluated by comparison with conventional flat Au chips. The nano-structure patterned substrate demonstrated a sensitivity enhancement up to 120% compared to a conventional SPR chip when ethanol solution was used as an analyte.

Keywords: LANGMUIR-BLODGETT; NANO-SPHERE LITHOGRAPHY; SENSITIVITY; SPR

Document Type: Research Article

DOI: http://dx.doi.org/10.1166/jnn.2011.3676

Publication date: May 1, 2011

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  • Journal for Nanoscience and Nanotechnology (JNN) is an international and multidisciplinary peer-reviewed journal with a wide-ranging coverage, consolidating research activities in all areas of nanoscience and nanotechnology into a single and unique reference source. JNN is the first cross-disciplinary journal to publish original full research articles, rapid communications of important new scientific and technological findings, timely state-of-the-art reviews with author's photo and short biography, and current research news encompassing the fundamental and applied research in all disciplines of science, engineering and medicine.
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