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A room - temperature highly - sensitive SO2 sensor with fast response and complete recovery is constructed based on gas dielectric field - effect transistor ( FET ) of CuPc single crystalline nanowire .
 Chemical: SO2; Chemical: CuPc
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: SO2; Chemical: CuPc