27141
We disclose a mixing effect caused by partial overlap of the highest occupied molecular orbital ( HOMO ) and lowest unoccupied molecular orbital ( LUMO ) of adsorbed gas molecules to explain graphene ' s ability to detect adsorbed molecules .
 Chemical: graphene
Given options, please tell me the categories of all the listed entity words.Output format is "type1: word1; type2: word2". 
Option: Chemical 
Text: {0} 
 Entities: graphene 
Answer:
 Chemical: graphene