Theoretical evaluation of a fiber-optic SPR biosensor based on a gold layer treated with thiol acidYosra Saad, Marwa Selmi, Mohamed Hichem Gazzah and Hafedh BelmabroukEur. Phys. J. Appl. Phys., 82 3 (2018) 31201DOI: https://doi.org/10.1051/epjap/2018180059