Silver nanoparticles with improved properties, especially for environmentally friendly applications for sensors

摘要

ufeffnanou010du00e1stice silver with improved properties, in particular for environmentally friendly applications in sensors, are pu0159ipravitelnu00e9 by aqueous extract of stem of rheum rhabarbarum with silver nitrate solution.the aqueous extract of stem of rheum rhabarbarum is prepared by mixing omytu00fdch pieces of fresh straw with demineralized water in a mass ratio of 1: 5 to 1: 10 and heating at a temperature of 40 to 80 degrees, keeping the constant temperature for 60 to 30 min, nu00e1sled of cooling to ambient temperature and filtration; the thus obtained aqueous extract acts in mixing of 00002 to 0.002 m silver nitrate solution, which is mixed in a volume ratio of 1: 2 to 1: 80 at room temperature, the mixture is kept in a dark place for a period of 12 to 26 h after odstu0159eu010fovu00e1na for 40 to 15 min at a temperature of 15 to 20 degrees c for obtaining nanoparticles of silver.