Zhu Jie, Li Fang, Liu Guannan, Liu Dong, Li Qiongyu, Kan Erjun
MIIT Key Laboratory of Thermal Control of Electronic Equipment, School of Energy and Power Engineering, Nanjing University of Science and Technology, Nanjing 210094, China.
Advanced Combustion Laboratory, School of Energy and Power Engineering, Nanjing University of Science and Technology, Nanjing 210094, China.
Nanomaterials (Basel). 2018 Aug 24;8(9):656. doi: 10.3390/nano8090656.
Recently, carbon nanomaterials have attracted significant attention due to their remarkable physical and chemical properties. The preparation methods and applications of the carbon nanomaterials have developed rapidly. In this study, the flame synthesis of amorphous carbon film grown on copper foil in an ethanol inverse diffusion flame was presented. The effects of ethanol flow rate, the copper foil location in flame and growth time were investigated in detail. The growth status of the synthetic amorphous carbon film was analyzed by an optical microscope and HRTEM (high resolution transmission electron microscope). Raman spectroscopy and XRD (X-ray diffraction) were used to characterize the structure of the carbon film. The roughness of the carbon film was determined by AFM (atomic force microscopy). As the ethanol flow rate increased and the copper foil moved upwards in the flame, the area of the synthetic amorphous carbon film increased. The roughness of carbon films with the growth time of 30 s and 2 min were smaller. In addition, the synthetic amorphous carbon film exhibited a certain degree of flexibility and visual transparency. Through the study, a reference could be provided to find the optimum condition for the flame synthesis of satisfactory amorphous carbon film. For these experiments, when the ethanol flow rate reached 2 mL/min, the copper foil was located on the top of the flame and the growth time was 2 min, an amorphous carbon film with higher quality could be obtained.
近年来，碳纳米材料因其卓越的物理和化学性质而备受关注。碳纳米材料的制备方法及应用发展迅速。本研究展示了在乙醇反向扩散火焰中，在铜箔上生长非晶碳膜的火焰合成法。详细研究了乙醇流速、铜箔在火焰中的位置以及生长时间的影响。通过光学显微镜和高分辨率透射电子显微镜（HRTEM）分析了合成非晶碳膜的生长状态。利用拉曼光谱和X射线衍射（XRD）对碳膜结构进行表征。通过原子力显微镜（AFM）测定碳膜的粗糙度。随着乙醇流速增加且铜箔在火焰中向上移动，合成非晶碳膜的面积增大。生长时间为30秒和2分钟的碳膜粗糙度较小。此外，合成非晶碳膜表现出一定程度的柔韧性和视觉透明度。通过该研究，可为寻找火焰合成令人满意的非晶碳膜的最佳条件提供参考。对于这些实验，当乙醇流速达到2毫升/分钟、铜箔位于火焰顶部且生长时间为2分钟时，可获得质量更高的非晶碳膜。
