EurekAlert September 11, 2019 At the edges of graphene bilayers atoms can exist in a quantum spin Hall state (QSH) depending on spin-orbit coupling (SOC). While the QSH state is allowed for ‘intrinsic’ SOC, it is destroyed by ‘Rashba’ SOC. Researchers in India have shown that the interaction between the two types of SOC are responsible for variations in the ways in which graphene bilayers conduct electricity. For nanoribbons of bilayer graphene, whose edge atoms are arranged in zigzag patterns, the bands of electron energies which are allowed and forbidden are significantly different to those found in monolayer graphene. This […]
Tag Archives: Graphene
Will your future computer be made using bacteria?
EurekAlert July 10, 2019 A major hurdle in adopting graphene for everyday applications is producing it at a large scale, while still retaining its amazing properties. An international team of researchers (The Netherlands, USA – University of Rochester) has developed a method to produce graphene by mixing oxidized graphite with bacteria. They exfoliated the graphite to produce graphene oxide (GO), which they then mixed with the bacteria Shewanella. After the beaker of bacteria and precursor materials sit overnight, the bacteria reduced the GO to a graphene material. The graphene is thinner, more stable, and can be stored for longer periods […]