Surface Plasmon Resonance Sensor to Detect n-Hexane in Palm Kernel Oil Using Polypyrrole Nanoparticles Reduced Graphene Oxide Layer. - Amir Reza Sadrolhosseini; Mina Habibiasr; Hassan Soleimani; Mohd Nizar Hamidon; Yap Wing Fen; H. N. Lim (J. Sensors, 2021)