21788
We demonstrate external quantum efficiency ( EQE ) of 4 % at 460 nm using a Ag nanostructured electrode and EQE of 1 . 3 % at 550 nm employing a Au nanostructured electrode .
 Ag, Au
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: Chemical 
Text: {0} 
Answer:
 Ag, Au