title: E-beam patterned gold nanodot arrays on optical fiber tips for localized surface plasmon resonance biochemical sensing.
abstract: Electron beam lithography (EBL) was used to directly pattern periodic gold nanodot arrays on optical fiber tips. Localized surface plasmon resonance of the E-beam patterned gold nanodot arrays on optical fiber tips was utilized for biochemical sensing. The advantage of the optical fiber based localized surface plasmon resonance (LSPR) sensors is the convenience to work with and work in harsh environments. An optical fiber tip LSPR refractive index sensor of 196 nm per refractive index unit (RIU) sensitivity has been demonstrated. The affinity sensing property of the fiber tip sensor was demonstrated using biotin/streptavidin as the receptor/analyte. The detection limit for streptavidin was determined to be 6 pM.
authors.affiliation: Nano and Micro Device Center, University of Alabama in Huntsville, Huntsville, AL 35899, USA. Liny@uah.edu
authors.forename: Yongbin
authors.initials: Y
authors.lastname: Lin
authors.forename: Yang
authors.initials: Y
authors.lastname: Zou
authors.forename: Yuanyao
authors.initials: Y
authors.lastname: Mo
authors.forename: Junpeng
authors.initials: J
authors.lastname: Guo
authors.forename: Robert G
authors.initials: RG
authors.lastname: Lindquist
mesh_terms: D015374:Biosensing Techniques / Q000295:instrumentation* / Q000379:methods; D001710:Biotin / Q000737:chemistry; D006046:Gold / Q000737:chemistry*; D053768:Metal Nanoparticles / Q000737:chemistry*; D055100:Optical Fibers; D012031:Refractometry / Q000295:instrumentation / Q000379:methods; D019809:Streptavidin / Q000737:chemistry; D020349:Surface Plasmon Resonance / Q000295:instrumentation* / Q000379:methods; D014057:Tomography, X-Ray Computed / Q000295:instrumentation* / Q000379:methods
chemical_list: D001710:Biotin; D006046:Gold; D019809:Streptavidin