Fig. 7From: Improvement of fiber optic based localized surface plasmon resonance sensor by optical fiber surface etching and Au cappingMeasurement of fine change of refractive index using FO-LSPR sensor with a 0 h Au capping and 0 s etching, b 0 h Au capping and 15 s etching, c 2 h Au capping and 0 s etching, and d 2 h Au capping and 15 s etching, respectivelyBack to article page