Nanowerk November 28, 2022
Researchers in Austria bombarded ultrathin materials with highly charged ions to explain why sometimes the projectile penetrates the material layer without any noticeable change in the material and sometimes the material layer around the impact site is also completely destroyed. They found that it is not the momentum of the projectile that is mainly responsible for the holes, but its electric charge. When an ion with multiple positive charge hits the material layer, it attracts a larger number of electrons and takes them with it leaving a positively charged region in the material layer. Graphene’s high electron mobility balances the positive chage in a short time. In other materials such as molybdenum disulfide, the electrons are slower, they cannot be supplied in time from outside to the impact site creating a nano-sized pore. According to the researchers their findings provide a new tool for manipulating films in a precisely calculable way…read more. Open Access TECHNICAL ARTICLEÂ
Ring structure of a simulated graphene flake. … Credit: Nano Lett. 2022, XXXX, XXX, XXX-XXX, November 18, 2022Â