8435
In this work , an improved synthesis of hollow gold nanospheres ( HGNs ) , which provides a tunable localized surface plasmon resonance ( LSPR ) from 610 nm up to 1320 nm , is demonstrated .
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Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: Chemical 
Text: {0} 
Answer:
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