10619
Scanning electron microscopy , transmission electron microscopy , Fourier transform infrared spectroscopy , X - ray diffraction , N ( 2 ) adsorption - desorption , a superconducting quantum interference device , UV - vis spectroscopy , and photoluminescence spectra were used to characterize the samples .
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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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