Strain-engineered fabrication of high-density aligned graphene nanoscrolls using UV
Researchers developed a method to fabricate high-density aligned graphene-based nanoscrolls using strain engineering and UV exposure.
Graphene nanoscrolls (GNSs), which are one-dimensional nanostructures formed by rolling a single graphene sheet, possess unique electronic and mechanical properties compared to the original graphene. Despite various synthesis methods, producing high-density GNSs with precise control over scroll chirality and direction has been challenging. Researchers have now developed a strain-engineered method for fabricating large-scale GNSs using ultraviolet (UV) light-tunable adhesive tape. By stretching the UV tape to apply tensile strain to graphene and then releasing it, isolated GNSs with increased density (approximately 380 nanoscrolls per mm) and length (90 μm) are formed.
This method also allows for control over the scroll angle, or chiral angle, by adjusting the stretch direction of the tape and graphene stack. The nanoscrolls' structure facilitates the intercalation of metal chloride molecules, enhancing electrical conductivity. Additionally, heteronanoscrolls composed of graphene and molybdenum disulfide (MoS2) are created by stretching MoS2/graphene heterostacks, which show a distinct optical response. This controlled synthesis approach for GNSs and heteronanoscrolls opens new possibilities for manipulating nanomaterials through strain engineering with functional UV tape.
Source: Graphene Feed