An investigation on theoretical and experimental synthesized graphene doped materials and its antibacterial activity

Abstract

Nanotechnology defines the ability to work at the nano level atom by atom to create large structure with fundamentally new molecular organization The results in nanomaterials and systems that often exhibit significantly changing physical chemical and biological properties due to their size and structural level Also a unique aspect of nanotechnology is the vastly increased ratio of surface area to volume At the nanoscale the properties are created due to size confinement dominance of interfacial phenomena and quantum effects Graphene nanomaterial is considered to be the mother of all graphitic materials since it can be wrapped up into 0D fullerene rolled into 1D carbon nanotube or stacked into 3D graphite This single atomic layer of carbon sheet made up of sp2 hybridized carbon atoms was later on named as Graphene This important characteristic of a zero band gap semiconductor which exhibits unusual electronic properties including ballistic transport room temperature quantum Hall effect pseudo spin chirality and conductivity without charge carriers makes it as a promising choice for future electronic materials Many theoretical and experimental works had demonstrated on the sensitivity of graphene could be remarkably improved by introducing appropriate dopants into the graphene lattice The interactions between the graphene surfaces and dopant molecules are simulated using density functional theory calculations implemented by Gaussian 09 software programs The present investigation deals with the preparation of graphene oxide GO and graphene oxide GO based nanocomposites i e tin oxide doped graphene oxide SnO2 GO and titanium oxide doped graphene oxide TiO2 GO and with a biomolecule named Quercetin with GO for the antimicrobial activity of Escherichia coli E coli Staphylococcus aureus vi S aureus and candida albicans newline