Facilitating Growth of Metal Encapsulated Carbon Nanotubes by Laser Assisted Thermal Decomposition Method and it's Focused Ion beam Processing for Magnetic Force Microscope New Type Probes

碳纳米管（CNT）中填充或封装有金属作为催化剂。我们成功地利用焦耳加热法制备了高长径比的线状镍填充碳纳米管。简单的方法是在电极和硅衬底之间夹持金属网格，用直流电使其通电产生焦耳热，并浸泡在乙醇中。观察到一些长度为50-800 nm，直径为5-80 nm，长径比为10-20的线性镍包覆碳纳米管。高分辨率TEM观察显示CNT具有3-50个石墨烯层。用透射电镜和X射线能谱仪对包覆镍进行了表征，用纳米束衍射仪对包覆镍进行了表征，结果表明包覆镍为面心立方单晶。采用聚焦离子束处理技术，将镍填充碳纳米管重新定位在针状钨基体上，用于磁力显微镜的新型探针。

Carbon nanotube (CNT) has filled with or encapsulated metal as a catalyst. We succeed that development of linear and high aspect ratio Ni filled CNTs by joule heating method. The simple method is that metal mesh grid are held between electrode and Si substrate, and they are electrified to generate joule heat with soaking in ethanol by direct current. Some linear Ni encapsulated CNTs with length : 50-800 nm, diameter : 5-80 nm and aspect ratio : 10-20 were observed. High resolution TEM observation showed that CNT had 3-50 graphene layer. Encapsulated Ni was identified by energy dispersive X-ray spectrum with equipping TEM, and single crystal in face-centered cubic structure by nano beam diffraction. We relocate Ni filled CNTs on needle shape tungsten for new type probe of magnetic force microscope by processing of focused ion beam.