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本工作用俄歇电子能谱(AES)测定K在Cu(111)表面上的覆盖度,用Kelvin探头测量表面功函数的变化,得出功函数依赖于K覆盖度的关系曲线,功函数最大变化值△φmax=3.14eV,功函数最小时的覆盖度θmin=0.18,初始偶极矩p(0)=7.0Debye,实验结果与武汝前等人的理论模型相一致。The work-function change of potassium on the Cu(111) surface was studied. The work-function change was measured by a Kelvin probe. The coverage of potassium on the surface was determined by AES. Maximum work-function change Δφmax=3.14 eV. Initial dipole moment p(0) = 7.0 Debye, The minimum work-function occurs at the coverage θmin= 0.18. The result of this work is consistent with that of the jellium-slab model.
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