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）是一种填充或封装金属作为催化剂的材料。采用焦耳加热法制备了线性高纵横比Ni填充碳纳米管。简单的方法是在电极和硅衬底之间固定金属网格，通过直流电浸泡在乙醇中产生焦耳热。观察到一些长度为50 ~ 800 nm、直径为5 ~ 80 nm、宽高比为10 ~ 20的线性Ni包覆CNTs。高分辨率透射电镜观察表明，碳纳米管具有3-50层石墨烯。采用能谱和透射电镜对Ni包覆物进行了表征，采用纳米束衍射对Ni包覆物进行了面心立方结构单晶的表征。通过聚焦离子束的处理，将Ni填充的碳纳米管重新安置在针状钨上，用于新型磁力显微镜探针。

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.