23053
On the basis of such effects of ozone treatment , we demonstrate a well - defined graphene pattern by using ozone photolithography , in which the ozone - treated graphene electrodes are monolithic but separated by insulating GO regions .
 Chemical: ozone; Chemical: graphene; Chemical: ozone; Chemical: ozone; 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: ozone; Chemical: graphene; Chemical: ozone; Chemical: ozone; Chemical: graphene