Fig. 5From: Improvement of fiber optic based localized surface plasmon resonance sensor by optical fiber surface etching and Au cappingOptical fiber surface image measured with 3D surface profiler a 0 s etching, b 5 s etching, c 10 s etching, d 15 s etching, respectively, and e roughness root mean square of the surface of optical fiber with etching timeBack to article page