通过在阳极氧化铝模板中热解二茂铁合成及表征非晶态碳纳米管。

Synthesis and characterizations of amorphous carbon nanotubes by pyrolysis of ferrocene confined within AAM templates.

作者信息

Hu Z D, Hu Y F, Chen Q, Duan X F, Peng L-M

机构信息

Key Laboratory for the Physics and Chemistry of Nanodevices and Department of Electronics, Peking University, Bejing 100871, China.

出版信息

J Phys Chem B. 2006 Apr 27;110(16):8263-7. doi: 10.1021/jp0568475.

DOI:10.1021/jp0568475

PMID:16623505

Abstract

Amorphous carbon nanotubes (a-CNTs) are synthesized by pyrolysis of ferrocene confined in the nanopores of the anodic alumina membrane (AAM) and characterized by field emission scanning electron microscopy (SEM), energy-dispersive X-ray spectroscopy (EDS), transmission electron microscopy (TEM), electron energy-loss spectroscopy (EELS), and Raman spectroscopy. It is shown that the a-CNT has an ultrathin amorphous wall (approximately 3 nm) and a relatively large diameter (approximately 50 nm), and is capsulated with iron oxide nanoparticles. It is found that the growth of the a-CNTs is governed mainly by the template limitation effect. Electrical transport measurements on individual a-CNTs demonstrate that the a-CNT may be connected with electrodes via either ohmic or Schottky contacts, and the resisitivity of the a-CNTs was measured to be 4.5 x 10(-3) Omega cm.

摘要

通过对限制在阳极氧化铝膜（AAM）纳米孔中的二茂铁进行热解来合成非晶态碳纳米管（a-CNTs），并通过场发射扫描电子显微镜（SEM）、能量色散X射线光谱（EDS）、透射电子显微镜（TEM）、电子能量损失光谱（EELS）和拉曼光谱对其进行表征。结果表明，a-CNT具有超薄的非晶态壁（约3nm）和相对较大的直径（约50nm），并且被氧化铁纳米颗粒包裹。发现a-CNTs的生长主要受模板限制效应支配。对单个a-CNTs的电输运测量表明，a-CNT可以通过欧姆接触或肖特基接触与电极相连，并且测得a-CNTs的电阻率为4.5×10^(-3)Ω·cm。