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
Given options, please tell me the categories of all the listed entity words.Output format is "type1: word1; type2: word2". 
Option: Chemical 
Text: {0} 
 Entities: AuNPs, PEG 
Answer:
 Chemical: AuNPs; Chemical: PEG