13234
Exciton diffusion lengths are measured to be as high as 4 and 5 nm in as - prepared and annealed QQT ( CN ) 4 films , respectively .
 QQT ( CN ) 4
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: Chemical 
Text: {0} 
Answer:
 QQT ( CN ) 4