Davis Benjamin F, Yan Xingyi, Muralidharan Nitin, Oakes Landon, Pint Cary L, Maschmann Matthew R
Department of Mechanical & Aerospace Engineering, University of Missouri , Columbia, Missouri 65211, United States.
Department of Mechanical Engineering and Interdisciplinary Materials Science Program, Vanderbilt University , Nashville, Tennessee 37235, United States.
ACS Appl Mater Interfaces. 2016 Oct 19;8(41):28004-28011. doi: 10.1021/acsami.6b10726. Epub 2016 Oct 11.
Small diameter carbon nanotube (CNTs) are synthesized directly from a parent CNT forest using a floating catalyst chemical vapor deposition (CVD) method. To support a new CNT generation from an existing forest, an alumina coating was applied to the CNT forest using atomic layer deposition (ALD). The new generation of small diameter CNTs (8 nm average) surround the first generation, filling the interstitial regions. The hierarchical forests exhibit a 5-10-fold increase in stiffness, and the two generations are electrically addressable in spite of the interfacial alumina layer between them. This work enables the design of complex CNT architectures with hierarchical features that bring tailored properties such as high specific surface area and robust mechanical properties that can benefit a range of applications.
小直径碳纳米管（CNT）是使用浮动催化剂化学气相沉积（CVD）方法直接从母碳纳米管森林中合成的。为了从现有的森林中培育出新的碳纳米管，采用原子层沉积（ALD）技术在碳纳米管森林上涂覆了一层氧化铝涂层。新一代小直径碳纳米管（平均8纳米）围绕着第一代，填充了间隙区域。这种分层森林的刚度提高了5至10倍，尽管两代之间存在界面氧化铝层，但它们在电学上是可寻址的。这项工作使得能够设计出具有分层特征的复杂碳纳米管结构，这些结构具有诸如高比表面积和强大机械性能等定制特性，可惠及一系列应用。
