10948
Herein , a method is reported for controlling the twinning structure of silver nanoparticles , and consequently their shape , via the plasmon - mediated synthesis , solely by varying the excitation wavelength between 400 , 450 , and 500 nm , which modulates the rate of Ag ( + ) reduction .
 Chemical: silver; 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: silver; Chemical: Ag ( + )