One-step synthesis and characterization of tree-like branched α-Si3N4 nano/submicron-structures by pyrolysis of a polymer precursor

Tree-like branched α-Si3N4 single-crystalline nano/submicron-structures were successfully synthesized in one step simply by catalytic pyrolysis of a powder mixture of an amorphous preceramic polymer (polyhydridomethylsilazane) and FeCl2 (as catalyst). The growth processes of the trunks and branches of the as-prepared structures were both controlled by vapor-liquid-solid mechanism. The luminescent behavior of the structures was also reported and discussed. An intensive photoluminescence, with peaks at 1.82, 2.16, 2.78, 3.24 and 3.97 eV, was observed.

Graphical abstractFigure optionsDownload full-size imageDownload as PowerPoint slide