12580
We study the self - assembly of ordered nanostructures , that is , nanorings ( NRs ) and quantum dots ( QDs ) , epitaxially grown on a polygonal cross - section nanowire ( PCS - NW ) using both theoretical and phase - field modeling .
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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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