7244
The enhancement factor is estimated to be 2 . 2 x 10 ( 4 ) for RdB from the long - range plasmon transfer of Ag to Au , corresponding to an attenuation of the enhancement by a factor of only 0 . 672 x 10 ( 4 ) compared to RdB adsorbed directly on the Fe ( 3 ) O ( 4 ) @ Ag microspheres .
 Chemical: RdB; Chemical: Ag; Chemical: Au; Chemical: RdB; Chemical: Fe ( 3 ) O ( 4 ); 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: RdB; Chemical: Ag; Chemical: Au; Chemical: RdB; Chemical: Fe ( 3 ) O ( 4 ); Chemical: Ag