نتایج جستجو برای: wall carbon nanotubes

تعداد نتایج: 450288  

2015
Brian D. Holt Kris Dahl Travis Horst Mohammad Islam Mary McCorry Philip Short Hengameh Shams Kris Noel Dahl Mohammad F. Islam

2008
Stephen Freiman Stephanie Hooker Kalman Migler Sivaram Arepalli

Certain equipment, instruments or materials are identifi ed in this paper in order to adequately specify the experimental details. Such identifi cation does not imply recommendation by the National Institute of Standards and Technology nor does it imply the materials are necessarily the best available for the purpose. iii FORWORD The NIST Recommended Practice Guide on Measurement Issues in Sing...

2001
H. Kataura Y. Kumazawa

Four kinds of single-wall carbon nanotubes (SWNTs) with different diameter distribution have been synthesized and optical absorption spectra have been measured. Three large absorption bands due to the optical transitions between spike-like density of states, characteristics of SWNTs, were observed from infrared to visible region. Comparing with the calculated energy band, it has been concluded ...

Journal: :The Journal of chemical physics 2004
Oleg A Louchev Hisao Kanda Arne Rosén Kim Bolton

The growth of single wall carbon nanotubes (SWNTs) mediated by metal nanoparticles is considered within (i) the surface diffusion growth kinetics model coupled with (ii) a thermal model taking into account heat release of carbon adsorption-desorption on nanotube surface and carbon incorporation into the nanotube wall and (iii) carbon nanotube-inert gas collisional heat exchange. Numerical simul...

2013
Ryo Nakanishi Ryo Kitaura Jamie H. Warner Yuta Yamamoto Shigeo Arai Yasumitsu Miyata Hisanori Shinohara

We report a high yield synthesis of single-wall boron nitride nanotubes (SWBNNTs) inside single-wall carbon nanotubes (SWCNTs), a nano-templated reaction, using ammonia borane complexes (ABC) as a precursor. Transmission electron microscope (TEM), high angle annular dark field (HAADF)-scanning TEM (STEM), electron energy loss spectra (EELS) and high resolution EELS mapping using aberration-corr...

Journal: :Nanotechnology 2009
Ye Liu Shaoxin Lu Balaji Panchapakesan

In this paper we report, for the first time, the alignment enhanced photoconductivity of single wall carbon nanotube films upon laser illumination. The photoconductivity exhibited an increase, decrease or even 'negative' values when the laser spot was on different positions between contact electrodes, showing a 'position' dependent photoconductivity of partially aligned films of carbon nanotube...

2007
Michael J. Biercuk Shahal Ilani Charles M. Marcus Paul L. McEuen

We review recent progress in the measurement and understanding of the electrical properties of individual metal and semiconducting single-wall carbon nanotubes. The fundamental scattering mechanisms governing the electrical transport in nanotubes are discussed, along with the properties of p–n and Schottkybarrier junctions in semiconductor tubes. The use of advanced nanotube devices for electro...

1999
K. A. Williams M. Tachibana L. Grigorian

Ž . We demonstrate that single-wall carbon nanotubes SWNT can be produced by an arc-discharge method using a catalyzed coal carbon source. Characterization by resonant Raman scattering and electron microscopy confirm that this material contains SWNT with properties similar to graphite-derived SWNT. ‘Web-like’ material from our growth process has an estimated yield of 45 wt.% of carbon as SWNT, ...

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