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The silica nanoparticles were modified with ( 3 - chloropropyl ) trimethoxysilan and polyethylenimine , respectively , and polymerised to form the TICSNs with ethylene glycol dimethacrylate as cross - linker .
 Chemical: silica; Chemical: ( 3 - chloropropyl ) trimethoxysilan; Chemical: polyethylenimine; Chemical: ethylene glycol dimethacrylate
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: ( 3 - chloropropyl ) trimethoxysilan; Chemical: polyethylenimine; Chemical: ethylene glycol dimethacrylate