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We carry out extensive Monte Carlo simulations to elucidate the effects of silica nanoparticles at a molecular level and find that van der Waals attractive interaction between silica nanoparticles and silver nanowires dominates over the depletion - induced interaction between silver nanowires , thus improving the dispersion of silver nanowires .
 Chemical: silica; Chemical: silica; Chemical: silver; Chemical: silver; Chemical: silver
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; Chemical: silver; Chemical: silver; Chemical: silver