Superemission in vertically-aligned single-wall carbon nanotubes
نویسندگان
چکیده
منابع مشابه
Anisotropy in the X-ray absorption of vertically aligned single wall carbon nanotubes
Carbon nanotubes are archetypical one dimensional systems, with peculiar anisotropic electronic properties. Only recently μm thick films of vertically aligned SWNT became available. The vertical alignment of the nanotube mats allows the realization of scattering geometries promoting specific dipole transitions parallel and normal to the axis of the SWNT. We find well expressed mosaic spreads fo...
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The growth process of vertically aligned single-walled carbon nanotube (SWNT) films was investigated by means of in situ optical analysis and scanning electron microscopy. The measurements reveal that the growth of the SWNT film decreases after longer reaction times. This decrease is attributed to a combination of a diminishing growth rate and burning of the SWNTs due to oxygen in the growth ch...
متن کاملDiameter modulation of vertically aligned single-walled carbon nanotubes.
We demonstrate wide-range diameter modulation of vertically aligned single-walled carbon nanotubes (SWNTs) using a wet chemistry prepared catalyst. In order to ensure compatibility to electronic applications, the current minimum mean diameter of 2 nm for vertically aligned SWNTs is challenged. The mean diameter is decreased to about 1.4 nm by reducing Co catalyst concentrations to 1/100 or by i...
متن کاملA Growth Mechanism for Vertically Aligned Single-Walled Carbon Nanotubes
One of the difficulties in developing practical nanotube-based devices is the large-scale production of aligned carbon nanotubes (CNTs). Due to their novel electronic and thermal properties, single-walled nanotubes (SWNTs) show great potential for use a variety of applications . The alignment of SWNTs has been reported, but only parallel to the substrate in the presence of strong electric or ma...
متن کاملPolarized Raman spectroscopy on vertically aligned single-walled carbon nanotubes
Vertically aligned single-walled carbon nanotube (VA-SWNT) films with high purity have been prepared up to 30 μm thick by the alcohol catalytic chemical vapor deposition (CVD) method[1][2]. In a previous polarized Raman spectroscopy study, we found anomalous anisotropic peaks such as at 180 cm for the excitation by 488 nm laser and explained them as perpendicularly polarized excitation [3]. How...
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ژورنال
عنوان ژورنال: Photonics and Nanostructures - Fundamentals and Applications
سال: 2016
ISSN: 1569-4410
DOI: 10.1016/j.photonics.2016.07.003