16190
The AuNCs fluoresce in the red to near - infrared region of the optical spectrum with emission centered at ~ 750 nm and a quantum yield of ~ 10 - 14 % , and they exhibit long fluorescence lifetimes ( up to ~ 300 ns ) .
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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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