Optimization of Graphene Oxide Layer-by-Layer Films to Be Used as an Enhancer Coating of Optical Fibers Sensors

Carlota Xavier, Paulo Zagalo, Paulo Ribeiro, Maria Raposo

2020

Abstract

The stability of Graphene oxide (GO) layers obtained by the layer-by-layer (LbL) films was investigated having in view the development of tunnable surfaces for optical fibre sensors in aqueous environments. For this purpose layer-by-layer (LbL) films based polyethylenimine (PEI) and GO, were prepared and characterized. The kinetics of adsorption of PEI/GO LBL films revealed that the adsorbed amount per bilayer increases linearly with the number of bilayers as expected. Furthermore adsorbed amount per bilayer for short adsorption times tends to a constant value revealing that GO layer growth also follows the adsorption behaviour expected polyelectrolytes in which electrostatic interaction is ruling the process. Finally desorption studies carried out to infer about GO layer stability revealed that GO layers are more stable at higher solutions pHs and if the adsorption time for each layer is short. These results/conclusions allowed to infer on the possible range of applications of PEI/GO LbL films.

Paper Citation

in Harvard Style

Xavier C., Zagalo P., Ribeiro P. and Raposo M. (2020). Optimization of Graphene Oxide Layer-by-Layer Films to Be Used as an Enhancer Coating of Optical Fibers Sensors. In Proceedings of the 8th International Conference on Photonics, Optics and Laser Technology - Volume 1: PHOTOPTICS, ISBN 978-989-758-401-5, pages 192-195. DOI: 10.5220/0009380701920195

in Bibtex Style

@conference{photoptics20,
author={Carlota Xavier and Paulo Zagalo and Paulo Ribeiro and Maria Raposo},
title={Optimization of Graphene Oxide Layer-by-Layer Films to Be Used as an Enhancer Coating of Optical Fibers Sensors},
booktitle={Proceedings of the 8th International Conference on Photonics, Optics and Laser Technology - Volume 1: PHOTOPTICS,},
year={2020},
pages={192-195},
publisher={SciTePress},
organization={INSTICC},
doi={10.5220/0009380701920195},
isbn={978-989-758-401-5},
}

in EndNote Style

TY - CONF

JO - Proceedings of the 8th International Conference on Photonics, Optics and Laser Technology - Volume 1: PHOTOPTICS,
TI - Optimization of Graphene Oxide Layer-by-Layer Films to Be Used as an Enhancer Coating of Optical Fibers Sensors
SN - 978-989-758-401-5
AU - Xavier C.
AU - Zagalo P.
AU - Ribeiro P.
AU - Raposo M.
PY - 2020
SP - 192
EP - 195
DO - 10.5220/0009380701920195