30036
The surface topography can be imaged using feedback control of the 2 <F077> vibration amplitude , which is very sensitive to the tip - sample separation distance in the range of 1 ~ 10 nm .
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Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: Chemical 
Text: {0} 
Answer:
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