Researchers map oxygen positions in graphene oxide samples

Scientists study thin carbon sheets

PhD student Sakshi worked with Dr Alexander Moewes at the University of Saskatchewan Department of Physics and Engineering Physics. They combined experiments at the Canadian Light Source with computer simulations to study graphene oxide structure. Graphene is one atom thick and conducts electricity well, but oxygen attachments change its behavior. Researchers examined a sample roughly the size of a grain of sand with powerful X-rays. Sakshi found that two types of oxygen parts affect the material differently in specific ways.

Oxygen groups attach to one side

Hydroxyls change electrical charge behavior while epoxides weaken bonds between carbon atoms within the structure. The oxygen-rich sections of this graphene substance favor binding exclusively to a single surface. About 60 percent of the carbon structure remains undisturbed by these attachments on the surface. This arrangement helps the material retain useful properties needed for various technological applications today. The research was published in the journal npj 2D Materials and Applications recently.

New control over material design

Understanding how manufacturing processes determine oxygen location allows researchers to tailor properties for energy storage. Scientists can now better design materials for sensors and water treatment systems using this knowledge. Sakshi is currently studying how different production methods affect the final structure of the graphene oxide. Knowing where atoms are located tells scientists how they will behave when moved to new positions. This approach helps unlock better materials for practical technologies like solar cells and batteries.