14263
Surface structures of PDMS incorporated with quaternary ammonium salts designed for antibiofouling and fouling release applications .
 Chemical: PDMS; Chemical: ammonium
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: PDMS; Chemical: ammonium