1. Size: 50-80nm, purity: 99.99% 2. Conductive paste 3. Antibiosis 4. Mouldproof 5. Preservation of cultural relics Application of silver nanoparticle:1. Conductive paste.2. Antibiosis in paper, plastic, textile, etc.3. Mouldproof matrerials in plastic, ceramic, textile, rubber, medical dressing, coating, structural adhesive, etc.4. Preservation of cultural relics.