15796
Controlled fabrication of hexagonally close - packed Langmuir - Blodgett silica particulate monolayers from binary surfactant and solvent systems .
 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