Obviously, the I D /I G values of S1, S2, and S3 show an increasing trend, and this can be attributed to a decrease in the amount of added PVDF, which has a lower degree of graphitization.
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Ultrafine FeNi<sub>3</sub> Nanocrystals Embedded in 3D Honeycomb-Like Carbon Matrix for High-Performance Microwave Absorption.
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