15567
Tunable - sized silica nanoparticles were synthesized by a microemulsion - mediated pathway and used as carriers for paramagnetic and luminescent probes .
 Chemical: silica
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: silica