Effect of ionization on the oxidation kinetics of aluminum nanoparticles

Zheng, Yao-Ting; He, Min; Cheng, Guangxu; Zhang, Zaoxiao; Xuan, Fu‐Zhen; Wang, Zhengdong

doi:10.1016/j.cplett.2018.02.039

Cited by 6 publications

(6 citation statements)

References 28 publications

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“…This is very beneficial as oxygen enhances positive ion yields ,, and, therefore, an oxide shell is expected to increase the generation of Al secondary ions. The thickness of such oxide layers is in the order of several nanometers and depends on crystallographic orientation, temperature, and pressure. − For example, aluminum oxide thickness at room temperature and ambient pressure is around 3–4 nm. , This range is in good agreement with calculations based on the thermodynamical model . Variable charge molecular dynamics simulations of the Al nanocluster oxidation show that a stable 4 nm thick amorphous oxide is formed during less than 470 ps simulation time, which is much shorter than the deposition process of the model sample presented in this study.…”

Section: Methodssupporting

confidence: 79%

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Elemental Characterization of Al Nanoparticles Buried under a Cu Thin Film: TOF-SIMS vs STEM/EDX

et al. 2020

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In this work we present a comprehensive comparison of Time-of-Flight Secondary Ion Mass Spectrometry (TOF-SIMS) and Scanning Transmission Electron Microscope combined with Energy-Dispersive X-ray Spectroscopy (STEM/EDX), which are currently the most powerful elemental characterization techniques in the nano-and microscale. The potential and limitations of these methods are verified using a novel dedicated model sample consisting of Al nanoparticles buried under a 50 nm thick Cu thin film. The sample design based on the low concentration of nanoparticles allowed us to demonstrate the capability of TOF-SIMS to spatially resolve individual tens of nanometre large nanoparticles under Ultra-High Vacuum (UHV) as well as High Vacuum (HV) conditions. This is a remarkable achievement especially taking into account the very small quantities of the investigated Al content. Moreover, the imposed restriction on the Al nanoparticles location, i.e. only on the sample substrate, enabled us to prove that the measured Al signal represents the real distribution of Al nanoparticles and does not originate from the artefacts induced by the surface topology. The provided comparison of TOF-SIMS and STEM/EDX characteristics delivers guidelines for choosing the most optimal method for efficient characterization of nano-objects.

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Section: Methodssupporting

confidence: 79%

“…The thickness of such oxide layers is in the order of several nanometers and depends on crystallographic orientation, temperature and pressure [38][39][40][41][42] . For example, aluminum oxide thickness at room temperature and ambient pressure is around 3-4 nm 39,43 .…”

Section: Methodsmentioning

confidence: 99%

Elemental Characterization of Al Nanoparticles Buried under a Cu Thin Film: TOF-SIMS vs STEM/EDX

et al. 2020

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“…In the heating to cooling stage, ANP undergoes an expansion process until the shell breaks in nsANP and is followed by a contraction process. The expansion of the particles is due to the initial gap between the core and the oxide shell [19].…”

Section: Resultsmentioning

confidence: 99%

Effect of Oxide Shell on Aluminium Nanoparticle Oxidation Using Molecular Dynamics Simulation

2021

IJETER

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Molecular dynamics simulation using reactive force field (ReaxFF)potential was implemented to study the oxidation mechanism in aluminium particles with two different alumina shells. That is, without an oxide shell and with a 1 nm oxide shell. In particular, this research investigated the atomic diffusivity of the system on the oxide shell effect. The results showed that in the heating process, oxygen molecules were adsorbed on the surface of the shell and then diffused to the particle core as the heating temperature increased. The diffusivity of oxygen molecules in the aluminium core which causes the oxidation process to occur, shows that the particles without the oxide shell are faster than the particles with the oxide shell. Although after relaxation, there are similarities in having an oxide shell. However, the thickness is different. This shows that the coating on Al particles can inhibit the rate of oxidation. The thickness of the oxide shell also affects the rate of oxidation.

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“…In this case, liquid and aluminum will cause combustion reactions [17] as in Figure 2. [17] This oxidation process is also explained by several researchers through TGA testing [18][19][20] so that the oxidation behavior can be known. This oxidation process is accompanied by an energy release [10,[13][14][15]21] by being influenced by particle size, gas pressure, and oxygen content.…”

Section: Mechanism Of Aluminum Combustionmentioning

confidence: 95%

Aluminum Combustion under Different Condition: A Review

Nurdiansyah

Ridha

2020

JEMMME

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This paper reviews the collection of literature on aluminum combustion, with an emphasis on various parameters used. These parameters which affect combustion of aluminum are particles size and oxygen content. Aluminum is a material that is often used in combustion processes due to its effortless reactive material and explosive. A large amount of research has been published about combustion in aluminum materials where aluminum can be used as a way to increase propulsion in combustion. The purpose of this paper is to review some aspects that affect combustion in aluminum. It goes on to discuss the particles size differences and the different oxygen content mixture with gas in used. The results of various existing studies show that there is a difference in ignition temperature and burning time effect in aluminum combustion due to the size and oxygen content. Where, decreasing particles size can decrease ignition temperature and burning time. The review paper is intended to outline a parameter range for aluminum combustion.

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Effect of ionization on the oxidation kinetics of aluminum nanoparticles

Cited by 6 publications

References 28 publications

Elemental Characterization of Al Nanoparticles Buried under a Cu Thin Film: TOF-SIMS vs STEM/EDX

Elemental Characterization of Al Nanoparticles Buried under a Cu Thin Film: TOF-SIMS vs STEM/EDX

Effect of Oxide Shell on Aluminium Nanoparticle Oxidation Using Molecular Dynamics Simulation

Aluminum Combustion under Different Condition: A Review

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