Enhanced luminescence of silver nanoparticles decorated on hydrothermally synthesized exfoliated MoS2 nanosheets

Herein, we report the synthesis of silver nanoparticles (AgNPs) decorated on exfoliated MoS2 nanosheets by a simple chemical method. This synthesis method has been achieved by reducing silver nitrate with hydrazine hydrate and ammonium hydroxide over hydrothermally synthesized exfoliated MoS2 nanosheets. Its structural and optical properties were characterized using electron microscopy, X-ray diffraction. From the structural, result shows a uniform and homogenous distribution of AgNPs on MoS2 nanosheets. Raman spectroscopy that was used for vibrational mode of these samples was characterized using Raman spectroscopy. Optical characterizations of silver nanoparticles decorated on exfoliated MoS2 nanosheet were done using UV-VIS spectrophotometry and photoluminescence (PL) spectroscopy. From the PL, result shows that these samples exhibits enhanced luminescence. Using MTT (3-(4, 5-dimethylthiazol-2-yl)-2, 5-diphenyltetrazolium bromide) assay method, the cytotoxicity measurement of these samples was done. Due to its biocompatible and fluorescence nature, it is very promising material for biological applications like bio imaging, drug delivery, etc.