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Our C ( 60 ) flowers exhibit intense photoluminescence ( PL ) and a blue - shifted PL intensity maximum compared to the same parameters for pristine C ( 60 ) , demonstrating the potential to control the optoelectronic properties of fullerene - based nanostructures .
 Chemical: C ( 60 ); Chemical: C ( 60 ); Chemical: fullerene
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: C ( 60 ); Chemical: C ( 60 ); Chemical: fullerene