Polyvinylpyrrolidone-Capped Silver Nanoparticles for Highly Sensitive and Selective Optical Fiber-Based Ammonium Sensor. - Potdar, Revati P.; Khollam, Yogesh B.; Shaikh, Shoyebmohamad. F.; More, Pravin S.; Rana, Abu ul Hassan S. (Nanomaterials (2079-4991), 2022)