25001
Au NPs were prepared by reduction of Au ( 3 + ) compound onto HCl - refreshed Ti in the presence of thiol - functionalized small peptides .
 Chemical: Au; Chemical: Au ( 3 + ); Chemical: HCl; Chemical: Ti; Chemical: thiol
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: Au; Chemical: Au ( 3 + ); Chemical: HCl; Chemical: Ti; Chemical: thiol