We propose a method for the generation of self-affine fractal random surfaces,in which we use Fourier transform and its inversion in the algorithm.The light scattering of surfaces of this kind is simulated at differen...We propose a method for the generation of self-affine fractal random surfaces,in which we use Fourier transform and its inversion in the algorithm.The light scattering of surfaces of this kind is simulated at different incident angles of illumination.The variation of the full width at half maximum(FWHM)of the intensity profile versus the perpendicular component k_(⊥)of the wave-vector shows clearly the characteristics of the surfaces parameters.The simulation demonstrates how the value of FWHM at k^(2)_(⊥)w^(2)≤1 region and the slope of ln wp-ln k_(⊥)curve at k^(2)_(⊥)w^(2)≥1 region are used,respectively,to extract the lateral correlation lengthξand the roughness exponentα.展开更多
文摘利用蔗糖和乙醇作为碳源,以氯化镍高温还原形成的镍颗粒作为模板,制备了泡沫状石墨烯多孔材料。继而以其作为载体,通过浸渍和高温热解法制备了泡沫状Mo S2/石墨烯二维复合材料。通过扫描电子显微镜(SEM)、透射电子显微镜(TEM)、拉曼光谱、X射线衍射(XRD)等技术手段研究了复合材料的形貌、组成和结构。循环伏安、恒流充放电和循环寿命测试均表明,该材料具有良好的超级电容器性能,质量比电容达203.5 F/g,面积比电容达280 m F/cm2,5000次恒流充放电循环后的电容保持率约80%。
基金Supported by the National Natural Science Foundation of China under No.69978012.
文摘We propose a method for the generation of self-affine fractal random surfaces,in which we use Fourier transform and its inversion in the algorithm.The light scattering of surfaces of this kind is simulated at different incident angles of illumination.The variation of the full width at half maximum(FWHM)of the intensity profile versus the perpendicular component k_(⊥)of the wave-vector shows clearly the characteristics of the surfaces parameters.The simulation demonstrates how the value of FWHM at k^(2)_(⊥)w^(2)≤1 region and the slope of ln wp-ln k_(⊥)curve at k^(2)_(⊥)w^(2)≥1 region are used,respectively,to extract the lateral correlation lengthξand the roughness exponentα.
