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We also show that the interaction potential energy between water and the graphene - based substrates is the main contribution to the work of adhesion of water with a relative magnitude that is independent of the number of graphene layers .
 Chemical: graphene; Chemical: graphene
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: Chemical 
Text: {0} 
Answer:
 Chemical: graphene; Chemical: graphene