The incorporation of functional nanoparticles within block copolymer micelles can form hybrid materials with desired optical, electronic, and magnetic properties. A versatile approach was developed to prepare ultralong nanofibers through the cooperative assembly of block copolymers and nanoparticles in emulsions. Enthalpic and entropic factors collectively contributed to the synergistic assembly of block copolymers and nanoparticles for the formation of uniform hybrids. The nanoparticles were precisely aligned in the central cores of the nanofibers which can reach to tens of micrometers. The uniform and ultralong nanofibers may serve as building blocks for constructing integrated architectures or devices for fundamental study and practical applications in nanoscience and nanotechnology.
In this study, the ultralong SiC nanofibers (SiC NFs) were synthesized through the sol–gel method assisted the chemical vapor deposition technique. The scanning electron microscope, transmission electron microscopy, X-ray diffraction, Raman, Fourier transform infrared, and X-ray photoelectron spectroscopy techniques were systematically employed to investigate the microstructure, morphology, and phase composition of the as-prepared products. The results demonstrated that the as-obtained products were β-SiC nanofibers with face-centered cubic crystal structure. Meanwhile, the ultralong SiC NFs present an average diameter of about 18 nm and a length up to several hundreds of micrometers and grew along the [1 1 1] direction with a planar stacking faults. In addition, we also investigated the formation mechanism and growth process of the ultralong SiC NFs. The successful preparation of such ultralong SiC NFs provides new idea for fabricating of other silicon-based ultralong nanofibers.
危险品化学品经营许可证（带存储）