The effect of mechanical activation on the exoelectron emission properties of activated charcoal

Klyuev, V. A.; Kutuzova, O. A.; Revina, E. S.; Toporov, Yu. P.

doi:10.1134/1.1359820

Cited by 2 publications

(2 citation statements)

References 1 publication

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“…The temperature position of the PTSE maxima indicates structural changes occurring in the surface layer of the sample, while the intensity of the maxima is proportional to the number of emission-active centers. [19,20]…”

Section: Doi: 101002/pssb202100467mentioning

confidence: 99%

Thermal Stability of Black Aluminum Films and Growth of Aluminum Nanowires from Mechanical Defects on the Film Surface during Annealing

Romanova

More-Chevalier

Novotný

et al. 2021

Physica Status Solidi (b)

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The thermal stability of black aluminum (Black Al) films deposited on unheated fused silica substrates by pulsed DC magnetron sputtering is investigated. The deposited films have porous moth‐eye morphology and a relatively soft surface that can be easily damaged mechanically. Photothermally stimulated exoelectron emission (PTSE) spectra of the films have emission peaks at 180 and 300 °C, which can be associated with processes of aluminum recrystallization occurring at these temperatures. The total emitted charge of PTSE decreases according to a power law with each subsequent heating, indicating that the most pronounced structural changes on the film surface occur during its first annealing. The shape of the mechanically intact pores of the films does not change after heating. However, spiral‐shaped aluminum nanowires grow from scratches and abrasions on the film surface already after heating up to 200 °C due to the stress‐induced migration of aluminum atoms. When scratches are deliberately applied to the surface of an already annealed film, the nanowires do not grow when the film is reheated. The results of this study show that mechanically intact as‐deposited Black Al films are thermally stable up to temperatures of at least 400 °C.

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Section: Doi: 101002/pssb202100467mentioning

confidence: 99%

Thermal Stability of Black Aluminum Films and Growth of Aluminum Nanowires from Mechanical Defects on the Film Surface during Annealing

Romanova

More-Chevalier

Novotný

et al. 2021

Physica Status Solidi (b)

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“…That triboluminescence can extend over to the x-ray portion of the electromagnetic spectrum was discovered by the Russian school of adhesion in their systematic research about the macroscopic consequences of contact electrification [16]. These studies started with Obreimoff's observation in 1930 that cleaving mica sheets in vacuum made the enclosure 'glow like an x-ray tube' [11], continued with the finding that the rupture of adhesive bonds generates high energy electrons by Karasev in 1953 [17] and culminated with Klyuev's measurements of x-ray spectrum from peeling pressure sensitive adhesive tape under vacuum in the 1980s [18,19]. More recently, it was shown that around 50% of the total x-ray emission happens in bursts lasting only a couple of nanoseconds.…”

Section: Introductionmentioning

confidence: 99%

The isotropic emission of tribo-generated x-rays from peeling adhesive tape

Hernández-Hernández

López-Pineda

Brandan

et al. 2020

J. Phys. D: Appl. Phys.

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x-rays generated through tribological processes are emitted in fast bursts (∼10 ns) that hinder the correct measurement of the corresponding spectrum. In this work we implement a dosimetry technique based on thermoluminescent materials—impervious to pileup problems arising in solid-state active detectors—to measure the angular distribution of the tribo-generated x-rays from peeling adhesive tape. Unexpectedly, we find evidence of an isotropic energy emission on at least one meridian plane. These results may shed light on the physical processes behind the radiation emission in devices that harness the triboelectric effect to generate x-rays, and prove that dosimetry techniques can be used as an alternative characterization tool in the study of the emission from this and other relatively fast systems.

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The effect of mechanical activation on the exoelectron emission properties of activated charcoal

Cited by 2 publications

References 1 publication

Thermal Stability of Black Aluminum Films and Growth of Aluminum Nanowires from Mechanical Defects on the Film Surface during Annealing

Thermal Stability of Black Aluminum Films and Growth of Aluminum Nanowires from Mechanical Defects on the Film Surface during Annealing

The isotropic emission of tribo-generated x-rays from peeling adhesive tape

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