11412
We report a colloidal synthesis of Au ( 0 . 80 ) Pd ( 0 . 20 ) - Fe ( x ) O ( y ) dumbbell nanocrystals ( NCs ) derived from Au ( 0 . 75 ) Pd ( 0 . 25 ) NCs by metal oxide overgrowth .
 Au ( 0 . 80 ) Pd ( 0 . 20 ) - Fe ( x ) O ( y ), Au ( 0 . 75 ) Pd ( 0 . 25 ), metal oxide
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: Chemical 
Text: {0} 
Answer:
 Au ( 0 . 80 ) Pd ( 0 . 20 ) - Fe ( x ) O ( y ), Au ( 0 . 75 ) Pd ( 0 . 25 ), metal oxide