Quantification of hCG Hormone Using Tapered Optical Fiber Decorated with Gold Nanoparticles. - David Saúl Villegas-Cantoran; Celia Lizeth Gómez; Luz del Carmen Gómez-Pavón; Plácido Zaca-Morán; Dulce Natalia Castillo-López; Arnulfo Luis-Ramos; Jesús Manuel Muñoz-Pacheco (Sensors, 2023)