title: Enhanced sensitivity of surface plasmon resonance phase-interrogation biosensor by using oblique deposited silver nanorods.
abstract: Sensitivity of surface plasmon resonance phase-interrogation biosensor is demonstrated to be enhanced by oblique deposited silver nanorods. Silver nanorods are thermally deposited on silver nanothin film by oblique angle deposition (OAD). The length of the nanorods can be tuned by controlling the deposition parameters of thermal deposition. By measuring the phase difference between the p and s waves of surface plasmon resonance heterodyne interferometer with different wavelength of incident light, we have demonstrated that maximum sensitivity of glucose detection down to 7.1 × 10(-8) refractive index units could be achieved with optimal deposition parameters of silver nanorods.
authors.affiliation: Research Center for Applied Sciences, Academia Sinica, Taipei 115, Taiwan.
authors.forename: Hung-Yi
authors.initials: HY
authors.lastname: Chung
authors.affiliation: Institute of Optoelectronic Sciences, National Taiwan Ocean University, Keelung 202, Taiwan.
authors.forename: Chih-Chia
authors.initials: CC
authors.lastname: Chen
authors.affiliation: Graduate Institute of Applied Physics, National Taiwan University, Taipei 106, Taiwan.
authors.forename: Pin Chieh
authors.initials: PC
authors.lastname: Wu
authors.affiliation: Graduate Institute of Applied Physics, National Taiwan University, Taipei 106, Taiwan.
authors.forename: Ming Lun
authors.initials: ML
authors.lastname: Tseng
authors.affiliation: Institute of Optoelectronic Sciences, National Taiwan Ocean University, Keelung 202, Taiwan.
authors.forename: Wen-Chi
authors.initials: WC
authors.lastname: Lin
authors.affiliation: Institute of Optoelectronic Sciences, National Taiwan Ocean University, Keelung 202, Taiwan.
authors.forename: Chih-Wei
authors.initials: CW
authors.lastname: Chen
authors.affiliation: Research Center for Applied Sciences, Academia Sinica, Taipei 115, Taiwan ; Institute of Optoelectronic Sciences, National Taiwan Ocean University, Keelung 202, Taiwan ; Institute of Physics, Academia Sinica, Taipei 115, Taiwan.
authors.forename: Hai-Pang
authors.initials: HP
authors.lastname: Chiang
keywords: Biosensor; Nanorods; Oblique angle deposition; Phase interrogation; Surface plasmons