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The adsorption state and the evolution of field emission properties of graphene edges at different temperatures

机译：石墨烯边缘在不同温度下的吸附状态和场发射特性的演变

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We have studied the effects of adsorbates on the field emission (FE) properties of graphene edges at different temperatures using Joule heating. Using infrared imaging and spectral fitting, the temperature from room temperature to about 1000 K was measured accurately. It was found that adsorption induces the deviation of graphene edge field emission from the Fowler–Nordheim law and the noise of the field emission. The adsorbates are gradually desorbed with an increase in temperature, and are almost completely desorbed above about 500 K. The FE of graphene edges without adsorption is fairly consistent with the FN theory.
机译：我们已经使用焦耳加热研究了吸附物对石墨烯边缘在不同温度下的场发射（FE）特性的影响。使用红外成像和光谱拟合，可以精确测量从室温到约1000 K的温度。发现吸附引起了石墨烯边缘场发射偏离Fowler-Nordheim定律和场发射噪声。随着温度的升高，被吸附物逐渐解吸，并在约500 K以上几乎完全解吸。没有吸附的石墨烯边缘的FE与FN理论相当一致。

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