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同一位置的EFM-KFM差异

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sun8069789 posted on Sat, Feb 2 2013 12:52 PM

 

 

 


孙博士:您好!

向您询问一个关于EFM-KFM的问题,附件二幅图片是我对聚合物表面用探针逐点注入电荷之后,分别采用EFM和KFM测量的结果。根据图片,我想问一下,为什么EFM信号显得比较清晰,每个点之间信号没什么干扰,而对应的KFM信号就显得不那么清晰啊?

祝 新年愉快

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对于EFM,默认条件下得到的是正比于力梯度的相位变化,而KFM默认是基于测量电场力而得到电势的振幅调制模式,因此会有分辨率的差异。详细计算我们在课上讲过,参见我们培训课程第三天的讲义,讲为什么FM测力梯度比AM测力的分辨率高那部分。

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