开尔文力显微镜下显示试验后的表面有带正电和负电的区域，属于微米级或者更小。
The Kelvin force microscopy scans showed that the resulting surfaces were mosaics, with areas of positive and negative charges on the order of a micrometer or less across.
开尔文力显微镜下显示试验后的表面有带正电和负电的区域，属于微米级或者更小。
The Kelvin force microscopy scans showed that the resulting surfaces were mosaics, with areas of positive and negative charges on the order of a micrometer or less across.
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