7533
Transmission electron microscopy ( TEM ) , elemental mapping , X - ray photoelectron and UV - visible spectroscopy studies confirm that the Fc molecules were well grafted to the surface of a GO sheet .
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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:
 None