LAUSR

Abstract Herein, we proposed a green design for a low-cost sensor based on graphene oxide (GO) adsorbed onto the surface of electrospun polycaprolactone (PCL) fibers. Ultrathin fibers were produced via electrospinning of PCL/acetic acid solutions, while the GO was obtained via carbonization of citric acid molecules. This sensor has been applied for the electrochemical detection of Bisphenol A (BPA) in water, which is an endocrine disrupting compound (EDC) responsible for several damages in living organisms, even at very low concentrations. While the detection of EDCs is pervasive at traces amounts due to their broad composition, our PCL/GO sensors showed a high sensitivity for BPA with a very low detection limit of approximately 23 nM (3.3 σ/S). In addition, the sensor showed a good reproducibility with a 7.9% relative standard deviation (RSD), while the sensor RSD response to 2 µM BPA was 5.7% for seven successive measurements. These results open up a window of applications of this nanostructured material, by easily combining a biodegradable polyester with GO obtained via a green and cost-effectiveness process using a naturally occurring component from citrus fruits.