20764
The specific loading of [ Au25L18 ] ( - ) on the substrates has been determined and the completely reversible loading and unloading of intact nanocrystals to and from the surface has been established .
 [ Au25L18 ] ( - )
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: Chemical 
Text: {0} 
Answer:
 [ Au25L18 ] ( - )