Investigations on the enhanced anti-microbial activity of one step synthesized ZnO, WO3, and rGO nano particles and fabrication of rGO nano electrode for EMG biomedical application.

The proposed study aims to synthesize ZnO, WO₃, and rGO nano particles (NPs) using simple and effective chemical reduction technique and to investigate its biomedical applications. According to the XRD results, synthesized NPs had hexagonal, monoclinic, and cubic crystal forms. The FESEM micro image shows sheet-like structure for rGO NPs, an algal crystal structure for ZnO, and a bulk cluster formation for WO₃ NPs. The value of band gap was found to be 5.75, 5.37 and 3.01 eV for ZnO, WO₃, and rGO NPs respectively. The presence of diverse functional groups in the produced NPs was verified using Fourier-transform infrared spectroscopy. Investigations against different microorganisms indicated an augmentation in the antibacterial activity for ZnO and WO₃ NPs. Electrodes coated with rGO NP were made and discovered to be effective in collecting human biomedical data more effectively. The performance of rGO NP coated electrodes was compared using a development board for electromyography analysis along with an android application for monitoring purposes. The quality of the signal, the ratio between the signal and the background noise, as well as the level of impedance between the electrode and the skin was observed to be better than conventional electrodes. [ABSTRACT FROM AUTHOR]