17044
These films can be easily removed from the interface and mesoporous silica films which retain the film geometry can be obtained after calcination ; moreover , this film preparation method provides a simple way to impart polymer functionality into the mesostructured silica wall , which means these films have potential applications in a variety of fields such as catalysis , molecular separation , and drug delivery .
 Chemical: silica; 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; Chemical: silica