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The discovery of carbon nanotubes has opened the door to numerous cutting-edge nanoscale research fields including microelectronic devices, and biomedical application. Although pure nanotubes suffice for most purposes, highly pure magnetic carbon nanotubes are more suitable for specialized applications such as gene delivery. The conventional purification methods of carbon nanotubes are too harsh for...
The electron emission properties from carbon nanocomposite films deposited at elevated temperatures using pulsed laser deposition techniques have been studied. By using both Fowler-Nordhiem and Wentzel-Kramers-Brillouin approximation for electron tunneling, changes of the internal enhancement factors were studied. The internal enhancement ratios were found to have a ratio of β100: β400: β700 = 1 :...
In this study, the catalytic activities of Raw CNTs and Co/CNTs for CO removal were determined between 100 and 300°C. To confirm the characterization of Raw CNTs and Co/CNTs, the composition and morphology of two catalysts were analyzed by using XRD, SEM, TEM and Raman spectra. The results showed that the CO conversion was 98% by using Raw CNTs at 250°C and this conversion was similar to that of using...
We report an experimental investigation into the controlled fabrication of metallic nanospheres on the tip of nanotubes. The fabrication process, nanobubbling, is based on nanofluidic mass delivery at the attogram scale using metal-filled carbon nanotubes (CNTs). Two methods have been investigated including electron-beam-induced bubbling (EBIB) and electromigration-based bubbling (EMBB). Under the...
A nanocomposite of functionalized 2.5 wt.% carboxylated multiwalled carbon nanotubes (MWCNTs) /polyaniline (PANi) is synthesized using in situ chemical polymerization method. MWCNT is coated by using in-situ chemical polymerization of Polyaniline polymer. Structure and morphology of nanocomposite is characterized, using X-ray diffraction pattern (XRD), scanning electron microscopy (SEM) and transmission...
The patterning of carbon nanostructures by electron beam stimulated oxidation is described. Sputter deposited carbon thin films and carbon nanotubes are locally oxidized in a scanning electron microscope using injected water vapor. The resulting structures are examined with scanning electron microscopy (SEM) and transmission electron microscopy (TEM). Electrical resistance obtained post-processing...
In the present work we have synthesized low density aligned carbon nanotubes using ethanol as a precursor and ferrocene as a catalyst by simple thermal chemical vapor deposition (CVD) method on silicon substrates. The synthesis involves the pyrolysis of ethanol/ ferrocene solutions. Mist of the hydrocarbon/catalyst is produced by medical nebulizer and nitrogen gas is used as the carrier to the large...
In this work, a simple, efficient and cost-effective in situ purification method has been developed based on gas-phase oxidation, in an effort to increase purity of single-walled carbon nanotubes (SWNT) in the course of SWNT synthesis by induction thermal plasmas. This newly developed purification method has the following advantages compared with the conventional off-line gas-phase oxidation techniques;...
The study presents the mass spectrometric application of carbon nanomaterials in proteomic research. We utilized two spherical carbon nanomaterials, C60 buckyball and iron-cored carbonball (Fe-C), in peptide sequence identification of a serum protein using matrix-assisted laser desorption ionization-time of flight mass spectrometer (MALDI-TOF-MS). The biological samples used in the experiments were...
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