Abstract: An opto-thermomechanical (OTM) nanoprinting method allows for additively printing nanostructures with sub-100 nanometer accuracy and for correcting printing errors for nanorepairing under ambient conditions. Different from other existing nanoprinting methods, this method works when a nanoparticle on the surface of a soft substrate is illuminated by a continuous-wave (CW) laser beam in a gaseous environment. The laser heats the nanoparticle and induces a rapid thermal expansion of the soft substrate. This thermal expansion can either release a nanoparticle from the soft surface for nanorepairing or transfer it additively to another surface in the presence of optical forces for nanoprinting with sub-100 nm accuracy. This additive OTM nanoprinting technique paves the way for rapid and affordable additive manufacturing or 3D printing at the nanoscale under ambient conditions.

Abstract: Provided are a high-quality, lithium-rich and manganese-based positive electrode material for a lithium ion battery and a method for synthesizing same. The method comprises the following steps: preparing a precursor by complexing an amino acid and a nickel-cobalt-manganese metal, mixing the above-mentioned precursor with a lithium salt, and subjecting same to ball-milling, drying and calcination to obtain a finished product. The amino acid is used as a complexing agent, benefiting the coprecipitation of the three transition metals, achieving the uniform distribution of each metal element in a material, improving the comprehensive electrochemical performance of a lithium-rich and manganese-based material, and improving the quality of the material. The lithium-rich and manganese-based material prepared by the method has characteristics such as a high tapped density, a high compaction density, and a better electrochemical performance.

Abstract: The present invention relates to a method for producing few-layer graphene powders. An electrolytic solution is introduced as a coagulation floating agent wherein graphene is able to be suspended thereon, which prevent the graphene from coacervation.