Energy loss of protons in carbon nanotubes: Experiments and calculations

Kyriakou, Ioanna; Celedón, Carlos; Segura, Rodrigo; Emfietzoglou, Dimitris; Vargas, P.; Valdés, Joaquín; Abril, Isabel; Denton, Cristian D.; Kostarelos, Kostas; García-Molina, Rafael

doi:10.1016/j.nimb.2010.02.073

Cited by 10 publications

(6 citation statements)

References 34 publications

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“…Due to the low density of CNTs and their finite length, the energy deposited in the material is relatively low. Extrapolating the data given in [21] yields a stopping power of about 5 eV/nm. The reflectivity and Raman spectra have been measured before and after proton irradiation.…”

Section: Results Of 35-mev Proton Irradiationmentioning

confidence: 94%

Gamma Radiation Effects in Vertically Aligned Carbon Nanotubes

Lubkowski

Kuhnhenn

Suhrke

et al. 2012

IEEE Trans. Nucl. Sci.

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This paper describes an experimental study of gamma radiation effects in low-density arrays of vertically aligned carbon nanotubes. These arrays are characterized by excellent anti-reflective and absorbing properties for wavelengths from UV to IR, which makes them an interesting option for stray light control in optical space applications. Gamma irradiation equivalent to an estimated surface lifetime exposition in geostationary orbit does not affect the reflectivity of the structures. First high-energy proton irradiation studies indicate that the reflectivity of the carbon nanotubes forests remains unchanged.

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Section: Results Of 35-mev Proton Irradiationmentioning

confidence: 94%

Gamma Radiation Effects in Vertically Aligned Carbon Nanotubes

Lubkowski

Kuhnhenn

Suhrke

et al. 2012

IEEE Trans. Nucl. Sci.

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“…Multi-walled carbon nanotubes were synthesized by the decomposition of a hydrocarbon source, acetylene, over palladium supported catalyst [12,13]. To grow carbon nanotube samples, a thermal chemical vapour deposition apparatus (CVD) was used, which is composed by a horizontal tube furnace, a set of gas flow lines and a quartz tube as reaction chamber.…”

Section: Target Preparation and Characterizationmentioning

confidence: 99%

“…After both processes, the sample was filtered with a 0.4 µm pore filter paper and washed thoroughly with abundant distilled water and dried in an argon atmosphere. This manufacturing method to obtain the aqueous solution of nanotubes was done at the Laboratorio de Nanomateriales (Universidad de Valparaíso, Chile) [12,13].…”

Section: Target Preparation and Characterizationmentioning

confidence: 99%

Energy loss of H+ and H2+ beams in carbon nanotubes: a joint experimental and simulation study

et al. 2019

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Carbon nanotube properties can be modified by ion irradiation; therefore it is important to know the manner in which ions deposit energy (how much and where) in the nanotubes. In this work, we have studied, experimentally and with a simulation code, the irradiation of multi-walled carbon nanotubes (MWCNT), supported on a holey amorphous carbon (a-C) substrate, with low energy (2−10 keV/u) H + and H2 + molecular beams, impinging perpendicularly to the MWCNT axis. The energy distribution of protons traversing the nanotubes (either from the H + beam or dissociated from the H2 + beam) was measured by the transmission technique in the forward direction. Two well-differentiated peaks appear in the experimental energy-loss distribution of the fragments dissociated from the molecular H2 + beam, in correspondence to the ones detected with the proton beam. One is the low-energy loss peak (LELP), which has a symmetric width; the other is the high-energy loss peak (HELP), which shows an asymmetric broadening towards larger energy loss than the corresponding proton energy distribution. A semi-classical simulation, accounting for the main interaction processes (both elastic and inelastic), of the proton trajectories through the nanotube and the supporting substrate has been done, in order to elucidate the origin of these structures in the energy spectra. Tregarding the H + energy spectrum, the LELP corresponds to projectiles that travel in quasi-channelling motion through the most outer walls of the nanotubes and then pass thorugh the substrate holes, whereas the HELP results mostly from projectiles traversing only the a-C substrate, with the asymmetry broadening being due to a minor contribution of those protons that cross the a-C substrate after exiting the nanotube. The broadening of the peaks corresponding to dissociated fragments, with respect to that of the isolated protons, is the result of vicinage effects between the fragments, when travelling in quasi-channelling conditions through the outer layers of the nanotube, and Coulomb explosion just after exiting the target. The excellent agreement between the measured and the simulated energy spectra of the H + beam validates our simulation code in order to predict the energy deposited by ion beams in carbon nanotubes.

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“…Ajaccio Corse International Conference on Space Optics 9 -12 October 2012 100 keV [11]. In total 4 samples were irradiated with fluences of 10 15 p/cm², 10 16 p/cm², 10 17 p/cm², and 5×10 17 p/cm² in vacuum with a proton energy of 80 keV (see Fig.…”

Section: Icso 2012mentioning

confidence: 99%