8035
Although sub - 100 nm nanoclusters of metal nanoparticles are of interest in many fields including biomedical imaging , sensors , and catalysis , it has been challenging to control their morphologies and chemical properties .
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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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