Synthesis and Characterization of Silver Nanoplates by a Seed-mediated Method

Mai Ngoc Tuan Anh, Do Thanh Sinh, Ngo Vo Ke Thanh, Nguyen Thi Thu Trang, Nguyen Thi Phuong Phong, Nguyen Dai Hai


Silver nanoplates (SNPs) having different size were synthesized by a seed-mediated method. The seeds -silver nanoparticles with 4 – 6 nm diameters were synthesized first by reducing silver nitrate with sodium borohydride in the present of Trisodium Citrate and Hydrogen peroxide. Then these seeds were developed by continue reducing Ag\(^+\) ions with various amount of L-Ascorbic acid to form SNPs. Our analysis showed that the concentratrion of L-Ascorbic acid, a secondary reducing agent, played an important role to form SNPs. In addition, the size and in-plane dipole plasmon resonance wavelenght of silver nanoplates were increased when the concentration of added silver nitrate increased. The characterization of SNPs were studied by UV-Vis, FE-SEM, EDS and TEM methods.


silver nanoplate, seed-mediated, plasmon resonance, L-Ascorbic acid

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