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The successful growth of single - crystal bilayer graphene provides an attractive jumping - off point for systematic studies of interlayer coupling in misoriented few - layer graphene systems with well - defined geometry .
 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