18462
By monitoring kinetics of GNP growth , we propose that ( 1 ) the surface of the GNP seeds embedded in the TBP cavities form catalytic centers for GNP growth and ( 2 ) large GNPs are formed by the aggregation of GNP seeds in an autocatalytic growth process .
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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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