Laser-generated plasmas by graphene nanoplatelets embedded into polyethylene

Torrisi, L.; Ceccio, G.; Restuccia, N.; Messina, Elena; Gucciardi, P. G.; Cutroneo, M.

doi:10.1017/s0263034617000179

Cited by 4 publications

(2 citation statements)

References 40 publications

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“…2. IC gives TOF spectra from which it is possible to evaluate the ion emission velocities and, as a first approximation, the charge states of the emitted ion species [7].…”

Section: Methodsmentioning

confidence: 99%

Physical investigations on the radiation damage of graphene oxide by IR pulsed laser

Silipigni

Torrisi

Cutroneo

2018

EPJ Web of Conferences

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Abstract. Graphene oxide foils were irradiated by Nd:YAG laser at the moderated intensities of the order of 10 8 W/cm 2 in vacuum. Measurements of atomic emission during the laser irradiation were performed with ion collectors and mass spectrometry, demonstrating a strong emission of carbon, oxygen and hydrogen atoms. Further investigations of the irradiated graphene oxide foils were carried out on pristine and laser irradiated samples by using Rutherford backscattering spectrometry and X-ray photoelectron spectroscopy. Results indicate that graphene oxide losses oxygen and hydrogen during the irradiation, changing its carbon content and its chemical and physical properties.

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“…2. IC gives TOF spectra from which it is possible to evaluate the ion emission velocities and, as a first approximation, the charge states of the emitted ion species [7].…”

Section: Methodsmentioning

confidence: 99%

Physical investigations on the radiation damage of graphene oxide by IR pulsed laser

Silipigni

Torrisi

Cutroneo

2018

EPJ Web of Conferences

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“…Extensive research had been conducted to investigate the applicability of graphene based material in medicine [2], energy storage [3], fundamental research [4][5], and others, but its suitability in laser matter interaction, in order to improve the ion acceleration from plasma, has been about ignored in literature despite the manufacturing of graphene sheets in a composite material is an indicated way to enhance its properties [6]. Recently, graphene has been produced on a sufficient scale and homogeneously incorporated in a polymeric matrix [7] to be irradiated by laser, exploiting its properties, optical, conductive and mechanical, with the aim to generate hot and dense plasmas in vacuum from which protons and carbon ion beams can be extracted and accelerated at high energy for many applications: hadrontherapy [8], astrophysical studies, laser-driven ion acceleration [9], inertial confinement fusion [10], and others. In the present work, we followed up the increasing demand of advanced target engineering in laser matter interaction, proposing a hybrid graphene based material fabricated to be irradiated by sub-picosecond high intensity laser, taking into account the significance of target composition, geometry, resistivity, roughness and thickness for the electron propagation and the production of sharp proton bunches; we paid attention to the close dependence between the electron spatial distribution and the features of emitted ions plasma laser-generated.…”

Section: Introductionmentioning

confidence: 99%

Graphite oxide based targets applied in laser matter interaction

Cutroneo

Torrisi

Badziak

et al. 2018

EPJ Web of Conferences

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Abstract.In the present work, we propose the production of a hybrid graphene based material suitable to be laser irradiated with the aim to produce quasi-monoenergetic proton beams using a femtosecond laser system. The unique lattice structure of the irradiated solid thin target can affect the inside electron propagation, their outgoing from the rear side of a thin foil, and subsequently the plasma ion acceleration. The produced targets, have been characterized in composition, roughness and structure and for completeness irradiated. The yield and energy of the ions emitted from the laser-generated plasma have been monitored and the emission of proton stream profile exhibited an acceleration of the order of several MeVs/charge state.

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Nucleation and growth of Si nanoparticles under different pulse repetition rates without the baffle for nanosecond pulsed laser-ablated deposition

et al. 2020

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In this article, Si nanoparticle (NP) films were prepared by pulsed laser ablation (PLA) in the argon atmosphere of 10 Pa at room temperature under different pulse repetition rates from 1 to 40 Hz without the baffle. Different from the conventional PLA method, the substrates were placed below and parallel to the ablated plume axis. The obtained films containing NPs were characterized by scanning electron microscopy and Raman spectrometer. The experimental results under constant laser fluence demonstrate the strong dependence of the mean size and the area number density of NPs on the repetition rate. Specifically, with the increase of pulse repetition rate, the mean size of the NPs in the film first decreases and reaches its minimum at 20 Hz, and then increases after 20 Hz, and decreases again till 40 Hz. The area number density shows the contrary trend versus mean size. The in situ diagnostic results of Langmuir probe denote the ablated Si ion density increases monotonously with the increase of repetition rate, while the temperature is almost constant. Combining with the nucleation probability, the growth/aggregation duration of NPs in the “nucleation region” and the effect of the baffle, the influence of pulse repetition rate on the formation of NPs is addressed. It is found that the repetition rate impacts the growth modes of NPs (i.e., growth and aggregation). 1–20, 20–30, and 30–40 Hz, respectively, correspond to growth-, aggregation-, and growth-controlled rate ranges without the baffle; however, 1–10, 10–20, and 20–40 Hz, respectively, correspond to growth-controlled, aggregation/growth-coexisted, and aggregation-controlled rate ranges with the baffle.

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Laser-generated plasmas by graphene nanoplatelets embedded into polyethylene

Cited by 4 publications

References 40 publications

Physical investigations on the radiation damage of graphene oxide by IR pulsed laser

Physical investigations on the radiation damage of graphene oxide by IR pulsed laser

Graphite oxide based targets applied in laser matter interaction

Nucleation and growth of Si nanoparticles under different pulse repetition rates without the baffle for nanosecond pulsed laser-ablated deposition

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