11799
Herein , we examined the optical properties of three Si QDs with increasing sigma - pi conjugation length : octyl - , ( trimethylsilyl ) vinyl - , and 2 - phenylvinyl - capped Si QDs .
 Chemical: Si; Chemical: octyl; Chemical: ( trimethylsilyl ) vinyl; Chemical: 2 - phenylvinyl; Chemical: Si
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: Si; Chemical: octyl; Chemical: ( trimethylsilyl ) vinyl; Chemical: 2 - phenylvinyl; Chemical: Si