SENSORS, 2013 IEEE
2013
High sensitivity optical fiber pH sensor using poly(acrylic acid) nanofibers
J.M. CORRES; F.J. ARREGUI; I.R. MATÍAS; Y. RODRÍGUEZ

Abstract

In this work a new optical fiber pH sensor based on the deposition of poly(acrylic acid) (PAA) using the electrospinning technique is presented. The optical fiber structure consists of a 4 cm segment of hollow core fiber (50/150μm) spliced between two standard multimode fibers onto which the nanoweb is deposited. The sensitive layer is a membrane composed by PAA nanofibers deposited onto the surface of an optical fiber. The sensor has a repetitive behavior and low hysteresis in the pH range 4-7, with an average sensitivity of 0,53 dB/pH.

Keywords: Optical fiber sensors; Optical fibers; Sensitivity; Polymers