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Published on: June 23, 2022
Enhanced sensitivity of surface plasmon resonance phase-interrogation biosensor by using oblique deposited silver
Hung-Yi Chung1, Chih-Chia Chen2, Pin Chieh Wu3
1Research Center for Applied Sciences, Academia Sinica, Taipei 115, Taiwan.
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.
