Energy loss distribution of proton beams at normal incidence on multi-walled carbon nanotubes

Valdés, Joaquín; Celedón, Carlos; Segura, Rodrigo; Abril, Isabel; García-Molina, Rafael; Denton, Cristian D.; Arista, N. R.; Vargas, P.

doi:10.1016/j.carbon.2012.09.014

Cited by 9 publications

(9 citation statements)

References 27 publications

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“…(250 eV) velocity. Another interesting characteristic is that the proton energy loss in MLG is larger as compared with the values obtained for amorphous carbon and nanotubes (12,13,20,21). The isolated point at 0.63 a.u.…”

Section: Energy Loss Measurementsmentioning

confidence: 79%

“…Also shown are the experimental energy losses for protons in carbon nanotubes of different dimensions. Green symbols correspond to proton energy loss data in a multi-wall carbon nanotube with an internal diameter of 5 nm and an external diameter of 27 nm, which correspond to a wall thickness 11 nm (20). Black symbols correspond to (13).…”

Section: Energy Loss Measurementsmentioning

confidence: 99%

“…Black symbols correspond to (13). Green and black symbols correspond to proton energy loss in MWCNT nanotubes, see text (20,21).…”

Section: Energy Loss Measurementsmentioning

confidence: 99%

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Proton energy loss in multilayer graphene and carbon nanotubes

Uribe

Mery

Fierro

et al. 2018

Radiation Effects and Defects in Solids

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Results of a study of electronic energy loss of low keV protons interacting with multilayer graphene targets are presented. Proton energy loss shows an unexpectedly high value as compared with measurements in amorphous carbon and carbon nanotubes. Furthermore, we observe a classical linear behavior of the energy loss with the ion velocity but with an apparent velocity threshold around 0.1 a.u., which is not observed in other carbon allotropes. This suggests low dimensionality effects which can be due to the extraordinary graphene properties.

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Section: Energy Loss Measurementsmentioning

confidence: 79%

Section: Energy Loss Measurementsmentioning

confidence: 99%

See 1 more Smart Citation

Proton energy loss in multilayer graphene and carbon nanotubes

Uribe

Mery

Fierro

et al. 2018

Radiation Effects and Defects in Solids

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“…Secondary electrons can also be emitted as a result of irradiation of nanotubes with ions. Studies of the effect of electronic excitations in ion collisions and energy loss distribution of proton beams incident on nanotubes [144][145][146] are important in this context. One consideration in experiments involving the interaction of energetic electron or ion beams with nanotubes is potential damage and atom dislocation.…”

Section: Secondary Emission From Carbonmentioning

confidence: 99%

Carbon Nanotube Electron Sources: From Electron Beams to Energy Conversion and Optophononics

Nojeh

2014

ISRN Nanomaterials

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Carbon nanotubes have a host of properties that make them excellent candidates for electron emitters. A significant amount of research has been conducted on nanotube-based field-emitters over the past two decades, and they have been investigated for devices ranging from flat-panel displays to vacuum tubes and electron microscopes. Other electron emission mechanisms from carbon nanotubes, such as photoemission, secondary emission, and thermionic emission, have also been studied, although to a lesser degree than field-emission. This paper presents an overview of the topic, with emphasis on these less-explored mechanisms, although field-emission is also discussed. We will see that not only is electron emission from nanotubes promising for electronsource applications, but also its study could reveal unusual phenomena and open the door to new devices that are not directly related to electron beams.

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“…Our experimental results show differences in the widths of each one of these peaks when comparing the dissociated H 2 + fragments with the case of isotachic isolated protons. In Section 3 a discussion about the origin and interpretation of these peaks is presented, based on a detailed simulation code [10,11] that follows in detail the trajectories of the projectiles through the nanotube and also through the a-C substrate, paying special attention to the interaction with the inhomogeneous electronic density of the MWCNT visited by the protons. Finally, the summary and conclusions of this work are presented in Section 4.…”

Section: Introductionmentioning

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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Energy loss distribution of proton beams at normal incidence on multi-walled carbon nanotubes

Cited by 9 publications

References 27 publications

Proton energy loss in multilayer graphene and carbon nanotubes

Proton energy loss in multilayer graphene and carbon nanotubes

Carbon Nanotube Electron Sources: From Electron Beams to Energy Conversion and Optophononics

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

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