Sensitivity Enhancement of Pb(II) Ion Detection in Rivers Using SPR-Based Ag Metallic Layer Coated with Chitosan-Graphene Oxide Nanocomposite. - Nurul Fariha Lokman; Nur Hidayah Azeman; Fatihah Suja; Norhana Arsad; Ahmad Ashrif A. Bakar (Sensors, 2019)