Journal
ACS APPLIED MATERIALS & INTERFACES
Volume 8, Issue 41, Pages 28004-28011Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acsami.6b10726
Keywords
carbon nanotubes; interfacial alumina; hierarchical nanostructure; electrically addressable; specific surface area
Funding
- Air Force Office of Scientific Research grant [FA9550-16-1-0011]
- University of Missouri startup funds
- NSF [CMMI 1400424]
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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.
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