Local Change of Carbon Nanotube-Metal Contacts by Current Flow through Electrodes
Local Change of Carbon Nanotube-Metal Contacts by Current Flow through Electrodes
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DOI：
10.1143/jjap.43.2027
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发表时间：
2004-04
影响因子：
1.5
通讯作者：
H. Maki;Masaki Suzuki;K. Ishibashi
中科院分区：
文献类型：
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作者：
H. Maki;Masaki Suzuki;K. Ishibashi
电流流经碳纳米管（CNT）-电极连接处的电极的新工艺被用来改变CNT导体的接触电阻和CNT量子点的隧道势垒。当将电流工艺应用于具有沉积在多壁碳纳米管（MWNT）上的金/钛电极的碳纳米管导体时，接触电阻显着降低。这是由于 Ti 和纳米管之间的强烈相互作用，在电极-纳米管连接处形成碳化钛 (TiC) 造成的。该工艺对于获得具有低接触电阻的CNT导体是有用的。同时，当电流过程应用于具有Au-Ag合金电极的单壁CNT（SWNT）量子点时，由于纳米管-Au-Ag相互作用较弱，接触电阻几乎没有变化。然而，在低温下对这些样品进行电学测量时，在电流流动过程后获得了具有强约束力的量子点。因此，该工艺也可用于CNT量子点隧道结的改变。
The new processes of current flow through electrodes at carbon nanotube (CNT)-electrode junctions were carried out to change the contact resistance of CNT conductors and the tunnel barriers of CNT quantum dots. When the current flow process was applied to CNT conductors with the Au/Ti electrodes deposited on multiwall CNTs (MWNTs), the contact resistance markedly decreased. This is caused by the formation of titanium carbide (TiC) at the electrode-nanotube junction due to the strong interaction between Ti and nanotubes. This process is useful for obtaining the CNT conductor with low contact resistance. Meanwhile, when the current flow process was applied to single-wall CNT (SWNT) quantum dots with Au-Ag alloy electrodes, the contact resistance hardly changed due to the weak nanotube-Au-Ag interaction. However, in the electrical measurement of these samples at low temperatures, a quantum dot with a strong confinement was obtained after the current flow process. Therefore, this process can be also used for the change of tunnel junctions of CNT quantum dots.