17849
The synthesis involves three major steps : 1 ) preparation of Au - Ag alloyed nanocages using a galvanic replacement reaction between Ag nanocubes and HAuCl4 ; 2 ) deposition of thin layers of pure Au onto the surfaces of the nanocages by reducing HAuCl4 with ascorbic acid , and ; 3 ) formation of Au cubic nanoframes through a dealloying process with HAuCl4 .
 Chemical: Au - Ag; Chemical: Ag; Chemical: HAuCl4; Chemical: Au; Chemical: HAuCl4; Chemical: ascorbic acid; Chemical: Au; Chemical: HAuCl4
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: Ag; Chemical: HAuCl4; Chemical: Au; Chemical: HAuCl4; Chemical: ascorbic acid; Chemical: Au; Chemical: HAuCl4