17159
The effect of surrounding solvents on the photoluminescence ( PL ) of MoS2 monolayers on Si / SiO2 substrates is studied .
 Chemical: MoS2; Chemical: Si; Chemical: SiO2
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: MoS2; Chemical: Si; Chemical: SiO2