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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Given options, please tell me the categories of all the listed entity words.Output format is "type1: word1; type2: word2". 
Option: Chemical 
Text: {0} 
 Entities:  
Answer:
 None