12189
The Bodipy labeled alkyl - thiol SAM , when adsorbed , is not fluorescent due to quenching by the Au surface .
 Chemical: thiol; Chemical: Au
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: thiol; Chemical: Au