Noise Spectroscopy of Self-aligned Carbon Nanowalls
Noise Spectroscopy of Self-aligned Carbon Nanowalls
复制标题
自对准碳纳米墙的噪声光谱
DOI：
10.1109/icnf.2015.7288600
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发表时间：
2015
期刊：
影响因子：
--
通讯作者：
T. Matsuba
中科院分区：
文献类型：
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作者：
T. Kawahara;Y. Ohno;K. Maehashi;K. Matsumoto;K. Okamoto;R. Utsunomiya;T. Matsuba
纳米碳材料有望用于未来的电子设备。它们的优越性能源自基于二维碳（石墨烯）片的低维结构。碳纳米墙（CNW）是由几层石墨烯组成的纳米碳材料。然而，在生长过程中控制 CNW 在器件中的位置很困难。这是 CNW 在场效应晶体管 (FET) 等应用中的局限性。我们开发了一种 CNW 自对准工艺，并研究了 CNW-FET 中 CNW 沟道的生长控制。 CNW-FET 在漏极-源极电流中显示出 1/f 型噪声。 CNW信道中有两个噪声资源。一是与大表面积分子吸附等环境噪声有关，二是与晶界散射有关。较高的生长温度会增大 CNW 中的晶粒尺寸，从而减少晶界处的载流子散射。因此，漏极-源极电流可能会增加。在这种情况下，源自晶界的噪声可能很小并且总1/f噪声变小。
Nano-carbon materials are promising for use in future electronic devices. Their superior properties are derived from the low dimensional structure based on the two dimensional carbon (graphene) sheet. Carbon nanowalls (CNWs) are nano-carbon materials comprising a few layers of graphene. However, controlling the position of CNWs in the devices is difficult during the growth process. This is the limitation of CNWs in applications such as field-effect transistors (FETs). We have developed a self-alignment process for CNWs and investigated the growth control of a CNW channel in CNW-FETs. The CNW-FET shows 1/f-type noise in a drain-source current. There are two noise resources in the CNW channels. One relates to environmental noise such as molecular adsorption with large surface area, and the second relates to grain boundary scattering. Higher growth temperatures enlarge the grain size in CNWs, and this results in a decrease in carrier scattering at the grain boundary. Therefore, the drain-source current could increase. In this case, the noise derived from the grain boundary might be small and the total 1/f noise becomes small.