The present study provides an efficient approach for nano-functionalization of diamond powders. Boron nanostructures can be grown on the entire surface of diamond particles by a simple heat treatment process. A mixture of diamond and boron powders with addition of Cu was used as the source material. After treatment, various boron nano-forms were grown on the diamond particle surface at different processing temperatures. High-density boron nanowires (BNWs) grew on the entire surface of diamond particles at 1060°C, while nanopillars cover diamond powders when heat treatment was performed at 1120°C. A series of analyses, including SEM, EDS, and TEM, were employed to investigate the as-grown boron nanostructures. The boron nanostructure was confirmed to be crystalline rather than amorphous, and it was shown to have a hexagonal structure.
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