28955
The size of both AuNPs and PEG was systematically varied and the trend was compared with theoretical calculations .
 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