8893
The electronic circular dichroism ( CD ) spectra of a methyl - thiol adsorbed at different sites on an icosahedral silver nanoparticle is studied by using time - perturbed density functional theory .
 Chemical: methyl - thiol; Chemical: silver
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: methyl - thiol; Chemical: silver