Aligned Growth of Single-Walled and Double-Walled Carbon Nanotube Films by Control of Catalyst Preparation

Aligned Growth of Single-Walled and Double- Walled Carbon Nanotube Films by Control of Catalyst Preparation

Growth of vertically aligned single-walled carbon nanotube films on quartz substrates and their optical anisotropy

Films of vertically aligned single-walled carbon nanotubes (SWNTs) with a few μm thickness were grown by catalytic chemical vapor deposition (CVD) on quartz substrates. Low-temperature CVD from ethanol was performed by using densely mono-dispersed Co-Mo catalyst of ≈ 1.0 – 2.0 nm prepared on quartz substrates by a dip-coating method. Continuous reduction of catalysts with Ar/H2 (3% H2) during C...

Optical characterization of vertically aligned single-walled carbon nanotube arrays

Here we discuss spectroscopic investigation and characterization of vertically aligned single-walled carbon nanotube (VA-SWNT) arrays, which were synthesized using the alcohol catalytic CVD method [1]. Growth of the VA-SWNTs was monitored using an in situ absorbance measurement [2], which provides information about the growth process. Primary methods employed were Resonance Raman and UV-Vis-NIR...

Growth of novel carbon phases by methane infiltration of free-standing single-walled carbon nanotube films

High-temperature methane infiltration of thin, free-standing films of acid-treated single-walled carbon nanotubes (SWCNT) has been studied by means of scanning electron microscopy, transmission electron microscopy and Raman spectroscopy. In the early stages of infiltration, carbon nuclei form predominantly at SWCNT bundle intersections. Further growth proceeds via the formation of graphite nano...

Zipping, entanglement, and the elastic modulus of aligned single-walled carbon nanotube films.

Reliably routing heat to and from conversion materials is a daunting challenge for a variety of innovative energy technologies--from thermal solar to automotive waste heat recovery systems--whose efficiencies degrade due to massive thermomechanical stresses at interfaces. This problem may soon be addressed by adhesives based on vertically aligned carbon nanotubes, which promise the revolutionar...