28952
This is achieved by coating AuNPs with a layer of thiolated compound , which inhibits the adsorption of PEG and also allows the control of surface charge .
 Chemical: AuNPs; Chemical: PEG
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: AuNPs; Chemical: PEG