Interaction of Graphene Oxide with Bacterial Cell Membranes: Insights from Force Spectroscopy

Interaction of cationic peptides with bacterial membranes.

A common feature of cationic peptides is that their site of action is at the membrane due to channel formation, and that they tend to possess strong selectivity towards their target membrane. For example, although moth cecropin and bee melittin are members of the same family of peptides that adopt amphipathic a-helical structures, the cecropins are strongly antibacterial and demonstrate minimal...

Freestanding bacterial cellulose-graphene oxide composite membranes with high mechanical strength for selective ion permeation

Graphene oxide (GO) based membranes have been widely applied in molecular separation based on the size exclusion effect of the nanochannels formed by stacked GO sheets. However, it's still a challenge to prepare a freestanding GO-based membrane with high mechanical strength and structural stability which is prerequisite for separation application in aqueous solution. Here, a freestanding compos...

Bacterial Interaction with Graphene Particles and Surfaces

Interaction imaging with amplitude-dependence force spectroscopy.

Knowledge of surface forces is the key to understanding a large number of processes in fields ranging from physics to material science and biology. The most common method to study surfaces is dynamic atomic force microscopy (AFM). Dynamic AFM has been enormously successful in imaging surface topography, even to atomic resolution, but the force between the AFM tip and the surface remains unknown...

Understanding water permeation in graphene oxide membranes.

Water transport through graphene-derived membranes has gained much interest recently due to its promising potential in filtration and separation applications. In this work, we explore water permeation in graphene oxide membranes using atomistic simulations and theoretical analysis, by considering flow through the interlayer gallery, expanded channels such as wrinkles of interedge spaces, and po...