18021
Optical response of individual Au - Ag @ SiO 2 heterodimers .
 Chemical: Au - Ag; Chemical: SiO 2
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: Au - Ag; Chemical: SiO 2