Synthesis and structural characterization of thin multi-walled carbon nanotubes with a partially facetted cross section by a floating reactant method
Synthesis and structural characterization of thin multi-walled carbon nanotubes with a partially facetted cross section by a floating reactant method
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DOI：
10.1016/j.carbon.2005.03.039
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发表时间：
2005-09-01
期刊：
影响因子：
10.9
通讯作者：
Tsuruoka, S
中科院分区：
文献类型：
--
作者：
Kim, YA;Hayashi, T;Tsuruoka, S
在这里，我们描述了通过使用浮动反应物方法的催化化学气相沉积方法以及随后的高达2600摄氏度的大量热处理来合成非常不寻常的多壁碳纳米管。这些纳米管的主要特征是（1）相对较宽的直径分布（20至70纳米）和线性、长的宏观形态（纵横比> 100），（2）高度笔直和结晶层，（3）通过去除金属杂质实现高纯度，（4）非常低的层间距（0.3385纳米）和低R值（I-D / I-G = 0.0717），（5）高G'强度超过强度G带（G'/G = 0.85）和强负磁阻值在77 K和I T时为-1.08%。热处理引起的具有部分刻面横截面形状的薄多壁碳纳米管的不寻常微观结构主要归因于有限纳米尺寸空间内的突然密度变化（从1.89到2.1 g/cm(3)），并伴随相分离。 (C) 2005 Elsevier Ltd. 保留所有权利。
Here we describe synthesis of very unusual multi-walled carbon nanotubes through a catalytic chemical vapor deposition method using a floating reactant method and subsequent thermal treatment up to 2600 degrees C in a large quantity. Main characteristics of these nanotubes are (1) relatively wide distribution of diameters ranging from 20 to 70 nm and linear, long macro-morphology (aspect ratio >100), (2) highly straight and crystalline layers, (3) high purity through removal of metallic impurity, (4) very low interlayer spacing (0.3385 nm) and low R value (I-D/I-G = 0.0717), (5) high G' intensity over intensity of G band (G'/G = 0.85) and strongly negative magneto resistance value of -1.08% at 77 K and I T. The unusual microstructure of thin multi-walled carbon nanotubes with a partially facetted cross-sectional shape caused by thermal treatment is mainly ascribed to abrupt density changes (from 1.89 to 2.1 g/cm(3)) within a confined nanosized space, accompanying with the phase separation. (C) 2005 Elsevier Ltd. All rights reserved.