Hexagonal ultrathin WO3 nano-ribbons （HUWNRs） of subnanometer thicknesses, 2-5 nm widths, and lengths of up to several micrometers were prepared by a solvothermal method. The as-prepared HUWNRs grow along the [001] ...Hexagonal ultrathin WO3 nano-ribbons （HUWNRs） of subnanometer thicknesses, 2-5 nm widths, and lengths of up to several micrometers were prepared by a solvothermal method. The as-prepared HUWNRs grow along the [001] direction, and the main exposed facet is the （720） crystal plane. The HUWNRs exhibit good electrochemical performance as an anode material in lithium ion batteries because of their unique structure. It is believed that these unique materials may be applied in many fields.展开更多
This paper aims at investigating the resonance frequencies and stability of a long Graphene Nano-Ribbon(GNR)carrying electric current.The governing equation of motion is obtained based on the Euler-Bernoulli beam mode...This paper aims at investigating the resonance frequencies and stability of a long Graphene Nano-Ribbon(GNR)carrying electric current.The governing equation of motion is obtained based on the Euler-Bernoulli beam model along with Hamilton’s principle.The transverse force distribution on the GNR due to the interaction of the electric current with its own magnetic field is determined by the Biot-Savart and Lorentz force laws.Using Galerkin’s method,the governing equation is solved and the effect of current strength and dimensions of the GNR on the stability and resonance frequencies are investigated.展开更多
基金This work was supported by the State Key Project of Fundamental Research for Nanoscience and Nanotechnology （Nos. 2011CB932401, 2011CBA00500, and 2012CB224802）, and the National Natural Science Foundation of China （Nos. 21221062, 21131004, and 21390393）. The authors thank Electron Microscopy Laboratory of Peking University for the help with HRTEM analysis.
文摘Hexagonal ultrathin WO3 nano-ribbons （HUWNRs） of subnanometer thicknesses, 2-5 nm widths, and lengths of up to several micrometers were prepared by a solvothermal method. The as-prepared HUWNRs grow along the [001] direction, and the main exposed facet is the （720） crystal plane. The HUWNRs exhibit good electrochemical performance as an anode material in lithium ion batteries because of their unique structure. It is believed that these unique materials may be applied in many fields.
文摘This paper aims at investigating the resonance frequencies and stability of a long Graphene Nano-Ribbon(GNR)carrying electric current.The governing equation of motion is obtained based on the Euler-Bernoulli beam model along with Hamilton’s principle.The transverse force distribution on the GNR due to the interaction of the electric current with its own magnetic field is determined by the Biot-Savart and Lorentz force laws.Using Galerkin’s method,the governing equation is solved and the effect of current strength and dimensions of the GNR on the stability and resonance frequencies are investigated.
