6879
Various measurements , such as optical spectroscopy , transmission electron microscopy combined with energy dispersive X - ray spectroscopy and inductively coupled plasma optical emission spectrometry , revealed the generation of homogenous 15 nm average size bimetallic NPs with different compositions and tunable localized surface plasmon resonance .
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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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