12757
Here , we demonstrated simultaneous attainment of high sensitivity and selectivity in thin - film field effect transistors ( TFTs ) based on outer - wall selectively functionalized double - walled carbon nanotubes ( DWCNTs ) .
 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: carbon