Thermal, Chemical and Radiation Treatment Influence on Hydrogen Adsorption Capability in Single Wall Carbon Nanotubes

2011 ◽  
Vol 1284 ◽  
Author(s):  
Michail Obolensky ◽  
Andrew Kravchenko ◽  
Vladimir Beletsky ◽  
Yuri Petrusenko ◽  
Valeriy Borysenko ◽  
...  
Keyword(s):  
Carbon Nanotubes ◽  
Electron Beam ◽  
Ball Mill ◽  
Room Temperature ◽  
Hydrogen Adsorption ◽  
Radiation Treatment ◽  
Single Wall Carbon Nanotubes ◽  
Single Wall Carbon ◽  
Volumetric Methods ◽  
Adsorption Capability

ABSTRACTThe raw single wall carbon nanotubes (SWCNT) were chemically and thermally treated and then milled in ball mill. After this SWCNT were irradiated by electron beam with energy 2.3 MeV up to fluence 1014 e-/cm2 at room temperature. Then SWCNT were saturated with hydrogen at pressure 5 bar and quenching down to the temperature 78 K. The sorption capability was measured by means of mass-spectroscopy and volumetric methods. The double increasing of mass hydrogen content in electron bombarded SWCNT was showed comparatively with non-irradiated samples.

Pressure Isotherms of Hydrogen Adsorption in Carbon Nanostructures

2001 ◽  
Vol 706 ◽  
Author(s):  
Xiaohong Chen ◽  
Urszula Dettlaff-Weglikowska ◽  
Miroslav Haluska ◽  
Martin Hulman ◽  
Siegmar Roth ◽  
...  
Keyword(s):  
Carbon Nanotubes ◽  
Activated Carbon ◽  
Hydrogen Storage ◽  
Carbon Nanostructures ◽  
Room Temperature ◽  
Storage Capacity ◽  
Hydrogen Adsorption ◽  
Single Wall Carbon Nanotubes ◽  
Hydrogen Storage Capacity ◽  
Carbon And Graphite

AbstractThe hydrogen adsorption capacity of various carbon nanostructures including single-wall carbon nanotubes, graphitic nanofibers, activated carbon, and graphite has been measured as a function of pressure and temperature. Our results show that at room temperature and a pressure of 80 bar the hydrogen storage capacity is less than 1 wt.% for all samples. Upon cooling, the capacity of hydrogen adsorption increases with decreasing temperature and the highest value was observed to be 2.9 wt. % at 50 bar and 77 K. The correlation between hydrogen storage capacity and specific surface area is discussed.

scholarly journals Site-specific forest-assembly of single-wall carbon nanotubes on electron-beam patterned SiOx/Si substrates

2008 ◽  
Vol 28 (8) ◽  
pp. 1366-1371 ◽  
Author(s):  
Haoyan Wei ◽  
Sang Nyon Kim ◽  
Sejong Kim ◽  
Bryan D. Huey ◽  
Fotios Papadimitrakopoulos ◽  
...  
Keyword(s):  
Carbon Nanotubes ◽  
Electron Beam ◽  
Single Wall Carbon Nanotubes ◽  
Site Specific ◽  
Single Wall Carbon ◽  
Si Substrates

Hydrogen adsorption on N-decorated single wall carbon nanotubes

2009 ◽  
Vol 373 (30) ◽  
pp. 2588-2591 ◽  
Author(s):  
Eduardo Rangel ◽  
Gregorio Ruiz-Chavarria ◽  
L.F. Magana ◽  
J.S. Arellano
Keyword(s):  
Carbon Nanotubes ◽  
Hydrogen Adsorption ◽  
Single Wall Carbon Nanotubes ◽  
Single Wall Carbon

Enhanced hydrogen adsorption on single-wall carbon nanotubes by sample reduction

2004 ◽  
Vol 108 (1-2) ◽  
pp. 120-123 ◽  
Author(s):  
M CALLEJAS ◽  
A ANSON ◽  
A BENITO ◽  
W MASER ◽  
J FIERRO ◽  
...  
Keyword(s):  
Carbon Nanotubes ◽  
Hydrogen Adsorption ◽  
Single Wall Carbon Nanotubes ◽  
Single Wall Carbon

Electrical Resistance of Single-Wall Carbon Nanotubes with Determined Chiral Indices

2009 ◽  
Vol 1204 ◽  
Author(s):  
Letian Lin ◽  
Lu-Chang Qin ◽  
Sean Washburn ◽  
Scott Paulson
Keyword(s):  
Carbon Nanotubes ◽  
Carbon Nanotube ◽  
Vapor Deposition ◽  
Electrical Resistance ◽  
Room Temperature ◽  
Chemical Vapor ◽  
Single Wall Carbon Nanotubes ◽  
Single Wall Carbon ◽  
Transmission Electron ◽  
Highly Sensitive

AbstractThe properties of a carbon nanotube (CNT), in particular a single-wall carbon nanotube (SWNT), are highly sensitive to the atomic structure of the nanotube described by its chirality (chiral indices). We have grown isolated SWNTs on a silicon substrate using chemical vapor deposition (CVD) and patterned sub-micron probes using electron beam lithography. The SWNT was exposed by etching the underlying substrate for transmission electron microscope (TEM) imaging and diffraction studies. For each individual SWNT, its electrical resistance was measured by the four-probe method at room temperature and the chiral indices of the same SWNT were determined by nano-beam electron diffraction. The contact resistances were reduced by annealing to typically 3-5 kΩ. We have measured the I-V curve and determined the chiral indices of each nanotube individually from four SWNTs selected randomly – two are metallic and two are semiconducting. We will present the electrical resistances in correlation with the carbon nanotube diameter as well as the band gap calculated from the determined chiral indices for the semiconducting carbon nanotubes. These experimental results are also discussed in connection with theoretical estimations.

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