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    • 2. 发明授权
    • Method for measuring work function
    • 功能测量方法
    • US07508216B2
    • 2009-03-24
    • US11640056
    • 2006-12-14
    • Wei Wei WeiKai-Li Jiang JiangShou-Shan Fan Fan
    • Wei Wei WeiKai-Li Jiang JiangShou-Shan Fan Fan
    • G01R31/26
    • G01N27/005
    • A method for measuring work function includes the steps of: (a) providing a field emission electron source having a carbon nanotube tip as a cathode electrode and a spaced anode electrode, having a predetermined spaced distance therebetween; (b) applying a voltage between the cathode electrode and the anode electrode and measuring a first current-voltage curve of the field emission electron source in a vacuum environment; (c) forming a layer of field emission material at least on the surface of the carbon nanotube tip; (d) measuring a second current-voltage curve of the now-treated field emission electron source in the same conditions as that in the step (b); (e) achieving two Fowler-Nordheim curves calculated from the two current-voltage curves according to the Fowler-Nordheim equation; and (f) comparing the two Fowler-Nordheim curves and calculating the work function of the field emission material therefrom.
    • 一种用于测量功函数的方法包括以下步骤:(a)提供具有碳纳米管尖端作为阴极和间隔开的阳极的场致发射电子源,它们之间具有预定的间隔距离; (b)在阴极电极和阳极电极之间施加电压,并在真空环境中测量场发射电子源的第一电流 - 电压曲线; (c)至少在所述碳纳米管尖端的表面上形成场致发射材料层; (d)在与步骤(b)相同的条件下测量现在处理的场发射电子源的第二电流 - 电压曲线; (e)根据Fowler-Nordheim方程,从两个电流 - 电压曲线计算出两个Fowler-Nordheim曲线; 和(f)比较两条福勒 - 诺德海姆曲线,并计算其中的场致发射材料的功函数。