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The unique aspects of the sol - flame method arise from the ultrafast heating rate and the high temperature of flame , which enables rapid solvent evaporation and combustion , and the combustion gaseous products blow out NPs as they nucleate , forming the NP chains around NWs .
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Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: Chemical 
Text: {0} 
Answer:
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