We demonstrated a sensitive biosensor based on plasmonic metal composite nanostructures. The device can be fabricated and duplicated with ease using a novel nanoprinting technology which allows precise transfer of metal nanostructures without complicated lithography processes. The design featured by its unique material composition and sub-wavelength structures maximizes the exposure of localized plasmonic hot spots to analyte and, therefore, enhances the refractive-index sensitivity with a plasmon resonance peak in visible range. A refractive-index-sensitivity of {\textasciitilde} 502 nm/RIU and a figure-of-merit of {\textasciitilde} 30.1 RIU1 has been achieved. The new sensing technology will find applications in medical diagnostics and environmental monitoring.
Nanostructured Optical Devices for Biosensing Applications
Type
Thesis
Year of Publication
2016
Date Published
Jan. 1, 2016
Publisher
Oregon State University
Abstract