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In order to utilize the unique properties of carbon nanotubes in microelectronic devices, it is necessary to develop a technology which enables high yield, uniform, and preferential growth of perfectly aligned nanotubes. We demonstrate such a technology by using plasma-enhanced chemical-vapor deposition ͑PECVD͒ of carbon nanotubes. By patterning the nickel(More)
The fabrication of flexible organic photovoltaics (OPVs) which utilize transparent and conducting single walled carbon nanotube (SWNT) thin films as current collecting electrodes on plastic substrates in zinc oxide nanowire (ZnO NW)/poly(3-hexylthiophene) (P3HT) bulk heterojunction photovoltaic devices is reported. The bulk heterojunctions for exciton(More)
The growth of vertically aligned carbon nanotubes using a direct current plasma enhanced chemical vapor deposition system is reported. The growth properties are studied as a function of the Ni catalyst layer thickness, bias voltage, deposition temperature, C 2 H 2 :NH 3 ratio, and pressure. It was found that the diameter, growth rate, and areal density of(More)
The possibility of performing spintronics at the molecular level may be realized in devices that combine fully spin polarized oxides, such as manganites with carbon nanotubes. However, it is not clear whether electrical transport between such different material systems is viable. Here, we show that the room-temperature conductance of(More)
The fabrication of carbon nanomaterials usually calls for expensive vacuum systems to generate plasmas and yields are disappointingly low. Here we describe a simple method for producing high-quality spherical carbon nano-'onions' in large quantities without the use of vacuum equipment. The nanoparticles, which have C60 cores surrounded by onion-like nested(More)
Field emission measurements using 0.3 ␮m thick nitrogen containing hydrogenated amorphous carbon films ͑a-C:H:N͒ on n ϩϩ-Si cathodes are reported. Onset emission fields as low as 4 V ␮m Ϫ1 have been obtained using a flat plate anode configuration. Uniform emission is observed over the entire cathode area at current densities below 7ϫ10 Ϫ2 mA cm Ϫ2. At(More)
We compare the field emission characteristics of dense (10 9 nanofibers/cm 2), sparse (10 7 nanofibers/cm 2), and patterned arrays (10 6 nanofibers/cm 2) of vertically aligned carbon nanofibers on silicon substrates. The carbon nanofibers were prepared using plasma-enhanced chemical vapor deposition of acetylene and ammonia gases in the presence of a nickel(More)
Tamoxifen (Tam) is effective for the treatment and prevention of breast cancer. However, it has toxic drawbacks and has limited-duration utility because, over time, human tumours become refractory to Tam. Recently, a new nontoxic peptide, alpha-fetoprotein-derived peptide (AFPep) has been proposed for the treatment and prevention of breast cancer. The(More)