27384
Recent developments in the assembly of functional fullerene ( C60 ) molecules , either in bulk or at interfaces , have allowed the production of shape - controlled nano - to - microsized objects that possess excellent optoelectronic properties , thus enabling the fabrication of optoelectronic devices .
 fullerene, C60
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: Chemical 
Text: {0} 
Answer:
 fullerene, C60