21785
Plasmonic excitation in metals has received great attention for light localization and control of light - matter interactions at the nanoscale with a plethora of applications in absorption enhancement , surface - enhanced Raman scattering , or biosensing .
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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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