14864
Our calculations indicate the metastable nature of carbonyl - rich rGO and its favorable transformation to hydroxyl - rich rGO at room temperature via carbonyl - to - hydroxyl conversion reactions near carbon vacancies and holes .
 Chemical: carbonyl; Chemical: rGO; Chemical: hydroxyl; Chemical: rGO; Chemical: carbonyl; Chemical: hydroxyl; Chemical: carbon
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: carbonyl; Chemical: rGO; Chemical: hydroxyl; Chemical: rGO; Chemical: carbonyl; Chemical: hydroxyl; Chemical: carbon