28473
Self - assembled plasmonic Dolmen structures consisting of small gold nanorods ( length = 50 nm and diameter = 20 nm ) with a few nanometer gaps are observed to show coherent effects of super - radiance and characteristics of Fano resonance due to the significantly reduced symmetry of the structure .
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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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