22762
Compared to the Au - Au homodimers , the Au - Ag dimers showed slightly broadened two - photon photoluminescence near the X symmetry point at the first Brillouin zone of Au , whilst that from the L symmetry point stayed the same .
 Chemical: Au - Au; Chemical: Au - Ag; Chemical: Au
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 - Au; Chemical: Au - Ag; Chemical: Au