다기능적인 3차원 탄소나노튜브 망 구조체와 센서 응용에 대한 연구

Abstract

Carbon nantoubes (CNTs) are the most attractive material in the files of nanoscience and nanotechnology due to their chemical, physical and electrical properties. However, those properties were predicted for an ideal CNT which is far from the CNTs we are practically producing today. In spite of many researching about CNTs last years, it is still unable to product using CNTs the product using CNTs. The main reasons are attributable to the existing synthesis method of CNTs. The structures of CNTs from the synthesis methods are powder form or vertical aligned form on substrate. In those cases, the CNTs should be dipersion for aligning with strong acid for dispersion of CNTs in liquid. During that process, the CNTs were defected are One-dimensional (1D) nanostructures, such as nanowires, nanofibers, nanorods, nanobelts and carbon nanotubes (CNTs), have attracted much attention in recent years due to their importance in terms of both fundamental studies in mesoscopic physics and technological applications in nanoscale device generation. CNTs are being applied in various kinds of nano-devices such as transistors, electrodes, sensors and filters because of their semiconducting, metallic, optical and structural properties. To date, CNTs are mostly synthesized, grown and dispersed on two-dimensionally plat substrate. However, it is not easy to fabricate and manipulate CNTs on a particularly structured substrate. In the case of CNTs growth on planar substrate, it is hard to get high conductivity, because of physical disconnection and low surface areas due to randomly oriented two-dimensional structure. Therefore, three-dimensionally networked structure of CNTs with enlarging active surface areas on pre-patterned substrate enhances the conductivity. In addition to these highly enhanced electrical, optical and chemical sensing properties of the network-structured CNTs, a mechanical filtration of submicron components is also possible.