Highly Sensitive and Selective Colorimetric Sensor of Mercury (II) based on Layer-by-Layer Deposition of Gold/Silver Bimetallic Nanoparticles.

ABSTRACT: A new colorimetric sensor based on gold/silver bimetallic nanoparticles (Au-Ag BNPs) for the sensitive and selective detection of mercury (II) was developed. Gold nanoparticles (AuNPs) were synthesized by Turkevich method. The surface modification of AuNPs was modified by the layer-by-layer technique using poly(diallyl dimethylammonium chloride) which provided positively charged of AuNPs. Negatively charged silver nanoparticles (AgNPs) were synthesized by chemical reduction using poly(4-styrenesulfonic acid-co-maleic acid) as the stabilizing agent. The layer-by-layer assembly deposition technique was used to prepare Au-Ag BNPs of positively and negatively charged of AuNPs and AgNPs, respectively. The synthesized Au-Ag BNPs were characterized by a UV-visible spectrophotometer, zeta potentia

SUBMITTER: Mathaweesansurn A 

PROVIDER: S-EPMC7583855 | biostudies-literature | 2020 Sep

REPOSITORIES: biostudies-literature