6220
Together with the observation that nanoprisms , which have a larger relative contact area with the membrane than spherical NPs , show an even slower diffusion , these findings indicate that the lateral mobility of NPs tethered in close vicinity to a membrane is significantly reduced by the friction at the NP - membrane interface .
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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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