Oriented carbon films with novel structure were prepared by microwave plasma from heavy oil residue.The prepared films were characterized by field emission scanning electron microscopy,high resolution transmission ele...Oriented carbon films with novel structure were prepared by microwave plasma from heavy oil residue.The prepared films were characterized by field emission scanning electron microscopy,high resolution transmission electron microscopy,X-ray powder diffraction and Raman spectroscopy.The products were formed with high purity,and oriented as the shape of a strip-like wheat spike.The outer layers of the spike have a higher degree of crystallization,the maximum width and length are about 65 nm and 900 nm,respectively,while the central parts are amorphous.It was suggested that the products experienced a process from outer to inner growth.Some metals existed in the deoiled asphalt,such as Ni and Fe,may contribute as catalyst to the aligned carbon film growth.展开更多
The molecular aggregation, orientation, and structure in Langmuir-Blodgett films of ferroelectric liquid crystal were studied by ultraviolet and Fourier transform infrared spectra. The results show that medium strong ...The molecular aggregation, orientation, and structure in Langmuir-Blodgett films of ferroelectric liquid crystal were studied by ultraviolet and Fourier transform infrared spectra. The results show that medium strong (H-aggregates) in the Langmuir-Blodgett films of ferroelectric liquid crystal are formed by chromophores where the alkyl chains are nearly perpendicular to the film surface. Compared with the cast films, the CO stretching bands, due to the rotational isomerism around the O—C axis of the chiral part, can be identified clearly in Langmuir-Blodgett films.展开更多
文摘Oriented carbon films with novel structure were prepared by microwave plasma from heavy oil residue.The prepared films were characterized by field emission scanning electron microscopy,high resolution transmission electron microscopy,X-ray powder diffraction and Raman spectroscopy.The products were formed with high purity,and oriented as the shape of a strip-like wheat spike.The outer layers of the spike have a higher degree of crystallization,the maximum width and length are about 65 nm and 900 nm,respectively,while the central parts are amorphous.It was suggested that the products experienced a process from outer to inner growth.Some metals existed in the deoiled asphalt,such as Ni and Fe,may contribute as catalyst to the aligned carbon film growth.
基金Project(2004CB619301) supported by the National Key Fundamental Research and Development Program of China
文摘The molecular aggregation, orientation, and structure in Langmuir-Blodgett films of ferroelectric liquid crystal were studied by ultraviolet and Fourier transform infrared spectra. The results show that medium strong (H-aggregates) in the Langmuir-Blodgett films of ferroelectric liquid crystal are formed by chromophores where the alkyl chains are nearly perpendicular to the film surface. Compared with the cast films, the CO stretching bands, due to the rotational isomerism around the O—C axis of the chiral part, can be identified clearly in Langmuir-Blodgett films.
