1903
Chemical functionalization of a single - walled carbon nanotube ( CNT ) with different carboxylic derivatives including - COOX ( X = H , CH3 , CH2NH2 , CH3Ph , CH2NO2 , and CH2CN ) has been theoretically investigated in terms of geometric , energetic , and electronic properties .
 Chemical: carbon; Chemical: carboxylic; Chemical: COOX; Chemical: H; Chemical: CH3; Chemical: CH2NH2; Chemical: CH3Ph; Chemical: CH2NO2; Chemical: CH2CN
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: carbon; Chemical: carboxylic; Chemical: COOX; Chemical: H; Chemical: CH3; Chemical: CH2NH2; Chemical: CH3Ph; Chemical: CH2NO2; Chemical: CH2CN