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Fabrication and characterization of suspended single-walled carbon nanotubes

机译:悬浮单壁碳纳米管的制备与表征

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Suspended single-walled carbon nanotubes (SWCNTs) between SiO2 pillars via a direct lithographic route using a simple mixture of catalyst precursor [Co(III) acetylacetonate, Co(acac)(3)] and conventional electron beam resist (ma-N2403) were fabricated. The catalytic electron beam resist (Cat-ER) layer plays dual roles as a catalyst and a resist layer for the growth and alignment of CNTs, respectively. The structure of the grown nanotube was characterized by Raman spectroscopy (633 nm laser excitation). Nanotubes grown from Cat-ER with Co(acac)3 show the typical Raman spectra of SWCNTs which are characterized by the strong tangential bands near to 1590 cm(-1) and radial breathing modes (RBMs) in the low frequency region (< 300 cm(-1)). The calculated diameter of the probed nanotubes individually corresponds to the range 0.86-1.77 nm. (c) 2006 Elsevier Ltd. All rights reserved.
机译:使用催化剂前体[乙酰丙酮钴(III),钴(acac)(3)]和常规电子束抗蚀剂(ma-N2403)的简单混合物,通过直接光刻路线在SiO2柱之间悬挂单壁碳纳米管(SWCNT),捏造的。催化电子束抗蚀剂(Cat-ER)层分别充当催化剂和CNT生长和对准的抗蚀剂层。生长的纳米管的结构通过拉曼光谱法(633nm激光激发)表征。由Cat-ER与Co(acac)3合成的纳米管显示了SWCNTs的典型拉曼光谱,其特征是接近1590 cm(-1)的强切向带和低频区域(<300)的径向呼吸模式(RBM)。厘米(-1))。所探测的纳米管的计算直径分别对应于0.86-1.77 nm的范围。 (c)2006 Elsevier Ltd.保留所有权利。

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