20804
Using alternative Au - NPs , including those stabilized with thiols , polymers , and bulky ligands , suggests that the amperometric enhancement of H2O2 is optimized at poly - l - lysine - linked film assemblies embedded with Au - NPs possessing small , charged , and conductive ( conjugated ) peripheral ligands .
 Au, thiols, H2O2, poly - l - lysine, Au
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: Chemical 
Text: {0} 
Answer:
 Au, thiols, H2O2, poly - l - lysine, Au