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Superhydrophobic surface has attracted enormous interests due to its attractive potential applications. Here, we prepare all carbon nanotube hybrid films simply by depositing multi-walled carbon nanotubes on strong single-walled carbon nanotube films through vacuum filtration. The hybrid films behave some exciting superhydrophobic properties of a large water contact angle of 152° and an ultra-low...
Reliability is one of the key specifications of a system. For graphene synthesis by chemical vapor deposition (CVD), previous studies have shown that a trace amount of oxidants can significantly affect graphene growth, either positively or negatively. Other than deliberately introducing oxygen, oxidant impurities may be introduced by the air leaked into the system or from impurities of the reaction...
N-doped carbon thin films (N-CFMs) on copper foils are synthesized by using acetonitrile (CH 3 CN) as liquid carbon and nitrogen precursors in a chemical vapor deposition system. Effect of acetonitrile feeding amount on the optical transmittance and electrical conductivity of N-CFMs are investigated. It is found that both the transmittance (from ∼41% to ∼75%) and sheet resistance (from ∼700Ω/sq...
Carbon nanotube (CNT) arrays doped with nitrogen were synthesized using chemical vapor deposition by pyrolysis of xylene/pyridine and ferrocene with a modified precursor feeding technique. The system produced a gradient of nitrogen concentration that modified the CNTs from a hollow cylinder to a bamboo-shaped structure which contains a series of compartments whose lengths are gradually reduced as...
Sandwiched film of MnO 2 nanosheet (MONS) and multi-walled carbon nanotube (MWCNT) was assembled by using the layer-by-layer method, based on electrostatic interaction of positively-charged poly (diallyl dimethyl ammonium chloride) and negatively-charged MONS and MWCNT. Ultraviolet–visible spectroscopy is used to probe the dynamic growth of multilayer film, exhibiting progressive enhancement...
This study shows that S concentration in the Fe catalyst plays an important role in controlling the number of graphene layers during carbon nanotube (CNT) growth via chemical vapor deposition. Using different S concentrations, we have grown thin carbon nanotubes with from 1 to 5 layers. Single-walled carbon nanotubes growing from the active surface of an FeS–Fe eutectic were observed. A growth model...
Direct tensile tests of double walled carbon nanotube (DWCNT) membranes with thickness of 40–80nm were performed using a micro-stress-strain puller. The tensile strength and Young’s modulus are 4.8E2–8.4E2MPa and 4.4–8.8GPa, respectively. The deformation and fracture processes were analyzed using the stress vs. strain curves, and SEM observations of the fracture surface of a membrane. The membrane...
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