Recently, the Hefei National Laboratory for Microscale Material Science of the University of Science and Technology of China has made new progress in the field of molecular-scale quantum control research. The researchers used atomic force needle-induced local catalytic reduction to achieve direct writing of nano-patterns on graphene oxide and the preparation of functional devices. The research results were published online in the journal Nature-Communication on November 13.
Single-layer graphene has unique electronic structure and electrical, thermal, and mechanical properties, and is expected to become an ideal material for future information devices. How to directly cut or prepare various nano-patterns on two-dimensional graphene is the premise of realizing people's dream of all-carbon-based circuits, and is also considered to be one of the most challenging directions in the field of graphene research.
In response to the above challenges, the research team of Professor Wang Xiaoping and the research team of Professor Luo Yi of the Molecular Scale Quantum Control Research Team of Hefei Microscale National Laboratory worked closely to propose the direct preparation of conductive Nano-patterns and construct new design ideas for devices and interconnected circuits. PhD student Zhang Kun et al. Used the localized catalysis of a platinum-plated atomic force tip to prepare a reduced graphene strip pattern with a minimum width of only 20 nm under a hydrogen atmosphere and low-temperature heating. Its conductivity exceeds 104 S / m. Graphene oxide has increased by 6 orders of magnitude.
Using this method, they also successfully demonstrated nano-interconnect circuits and field effect transistor devices. The mobility of the device can reach 20cm2 / Vs, which is significantly better than the mobility performance of currently commonly used conductive polymer and amorphous silicon field effect tube devices. In addition, through theoretical calculations, they revealed the microscopic mechanism of this local reduction reaction. This technology has obvious advantages such as direct writing of graphics and devices, controllable line width, mild preparation conditions (any substrate, normal pressure, near room temperature), and compatibility with existing microelectronics technologies. Therefore, it is expected to promote graphene nanodevices, The final realization and application of circuit and integration.
This research was supported by projects such as the quantum control project of the National Major Research Project and the innovative research group of the National Natural Science Foundation of China.
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