14569
The different nanostructured Pt shells on the Ag core were confirmed by ultraviolet - visible absorption spectroscopy and transmission electron microscopy .
 Chemical: Pt; Chemical: Ag
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: Pt; Chemical: Ag