Synthesis of the Tube-Brush-Shaped SiC Nanowire Array on Carbon Fiber and Its Photoluminescence Properties

Abstract

Tube-brush-shaped nanostructure of SiC nanowires was synthesized on polyacrylonitrile-based carbon fibers. The morphology and microstructure of the nanowires were characterized by X-ray powder diffraction, field emission scanning electron microscopy and high-resolution transmission electron microscopy. A quasi-periodically twin structure with (111) plane as the boundary along the SiC nanowires was observed. The vapor-solid growth mechanism of the SiC nanowire brush is also discussed. Moreover, some separated blue-shifted photoluminescence peaks around 469 nm were measured. The separated blue-shifted emission peaks are attributed to the quantum confinement of nanoscaled twin segments along each nanowire rather than the apparent diameters of the nanowires. The SiC nanowire brushes hopefully can find potential applications in nanotechnology.

Synthesis and characterization of ultralong SiC nanowires with unique optical properties, excellent thermal stability and flexible nanomechanical properties

“…The spectrum exhibits visible luminescence, giving a broad range emission band between 400 nm and 600 nm, with two obvious peaks at 438.9 nm (2.83 eV) and 527.8 nm (2.35 eV). All of the above peaks showed blueshifts to different extents relative to the bulk 3C-SiC at 539 nm (2.23 eV) 45 . Although, the detailed luminescence mechanism of the NWs is still not fully understood, previous studies have shown that the PL properties of SiC NWs strongly depend on the synthesis conditions, microstructures, and morphologies.…”

Photoluminescence property of inexpensive flexible SiC nanowires membrane by electrospinning and carbothermal reduction

“…48 Electrons can transit from the trap level to the luminous center level. 49 The blue emission peak at 431 nm is mainly caused by electronic transitions and oxygen defects. The peak at 485 nm was primarily due to the blue-green light emission of SiC NWs.…”

“…The oxygen atoms in the twofold coordinated silicon can form a luminous center level near the valence band 48 . Electrons can transit from the trap level to the luminous center level 49 . The blue emission peak at 431 nm is mainly caused by electronic transitions and oxygen defects.…”

Enhancing photoluminescence properties of SiC/SiO2 coaxial nanocables by making oxygen vacancies

“…SiC nanocables are particularly attractive due to their excellent electronic, physical, and chemical properties and have potential applications as functional ceramics, hightemperature semiconductors and electron field-emitting devices. [1][2][3][4][5][6][7] A nanocable is a coaxial core-sheath heterostructure consisting of a heterogeneous semiconductor, insulator and/or metal within a one-dimensional nanostructure. The unique structure of the nanocables exhibits various novel applications: for instance, field-effect transistors, photocatalysts, and electron devices.…”