Study of the interaction between copper and carbon nanotubes

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• 作者：Carla Bittencourt^a ; Xiaoxing Ke^a ; Gustaaf Van Tendeloo^a ; Sebastian Thiess^b ; Wolfgang Drube^b ; Jacques Ghijsen^c ; Chris P. Ewels^d ; ^{chris@ewels.info} ; ^{chris.ewels@cnrs-imn.fr}
• 刊名：Chemical Physics Letters
• 出版年：2012
• 期刊代码：7_00092614
• 类别：ph
• 出版时间：11 May, 2012
• 卷：535
• 期：Complete
• 页码：80-83
• 文件大小：549 K

摘要

Copper deposited by thermal evaporation onto pristine and oxygen plasma treated carbon nanotubes (CNTs) diffuse over the CNT surface, coalescing and forming crystalline islands. The nucleation sites of the islands are preferentially defects, and more homogeneous island dispersion was observed at the CNT oxygen functionalized surface. The presence of weakly bound oxygen atoms at the CNT surface induces the formation of Cu-O bonds at the Cu/CNT interface, as described through density functional calculations. Exposure to air allows further oxidation to facetted crystalline Cu₂O. Oxygen plasma pre-treatment represents a promising route for homogenous disperse Cu₂O nanoparticle decoration of CNTs.