Controlled oxidation of aluminum nanoparticles

Litrico, Giuliana; Proulx, Pierre; Gouriet, Jean‐Baptiste; Rambaud, Patrick

doi:10.1016/j.apt.2014.11.004

Cited by 34 publications

(16 citation statements)

References 17 publications

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“…[ 37,44 ] This transient growth process of the oxide skin can be described by the Cabrera–Mott model ( Figure a). [ 45–47 ] When the liquid metal is exposed to air, an oxygen layer instantly adsorbs on its surface. Owing to the tunnel effect, the electrons of the metal escape from the inner core and then transfer to the adsorbed oxygen.…”

Section: Features Of Liquid Metalsmentioning

confidence: 99%

Liquid Metals: A Novel Possibility of Fabricating 2D Metal Oxides

Zhao

Zhang

2021

Advanced Materials

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2D metal oxides (2DMOs) have been widely applied in the fields of electronic, magnetic, optical, and catalytic materials, owing to their rich surface chemistry and unique electronic structures. However, their further development faces challenges such as the difficulty in fabricating 2DMOs with unstable surface induced by strong surface polarizability, or the high cost and limited yield of the fabrication process. Recently, liquid metals have shown great potential in the fabrication of 2DMOs. The native oxide skin formed on the surface of liquid metals can be considered as a perfect 2D planar material. Due to the solubility, fluidity, and reactivity of liquid metals, they can act as the solvent, reactant, and interface in the fabrication of 2DMOs. Moreover, liquid metals undergo a liquid–solid phase transition, enabling them to be a symmetric matched substrate for growing high‐quality 2DMOs. An insightful survey of the recent progress in this research direction is presented. The features of liquid metals including good solubility, chemical reactivity, weak interface force, and liquid–solid phase transitions are introduced in detail. Furthermore, strategies for the fabrication of 2DMOs by virtue of these features are summarized comprehensively. Finally, current challenges and prospects regarding the future development in the fabrication of 2DMOs via liquid metals are highlighted.

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Section: Features Of Liquid Metalsmentioning

confidence: 99%

Liquid Metals: A Novel Possibility of Fabricating 2D Metal Oxides

Zhao

Zhang

2021

Advanced Materials

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“…Oxygen molecules are adsorbed on metallic Zn of ZNR surface and then acquire electrons to form ionized oxygen. Sequentially, two or three oxide layers are formed till an electrical field is generated between the metallic Zn and the oxide layer, which suppresses further oxidization [ 26 ]. In the Zn enrichment surface, the additional electrical potential on the top two-three layers of ZNR surface caused by the oxidization process and the hydroperoxide (ZnO 2 ) may form on the top layer due to adsorption of more oxygen on the top surface of ZNRs [ 22 ].…”

Section: Resultsmentioning

confidence: 99%

Migration Energy Barriers for the Surface and Bulk of Self-Assembly ZnO Nanorods

Chang

Huang

et al. 2018

Nanomaterials

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Post-annealing treatment is a necessary process to create/eliminate/repair defects in self–assembly (SA) metal oxide by providing enough thermal energy to the O atoms to overcome the migration energy barrier in ZnO. The height of migration energy barrier is dependent on the depth from the surface, which is hard to be estimated by theoretical calculations, as well as the optical analyses. SA ZnO nanorods (ZNRs) have high surface-to-volume ratio to provide complete picture between the optical and surface properties obtained by photoluminescence (PL) and ultraviolet/X-ray photoemission spectroscopy (UPS/XPS), which is used to investigate the evolution of structure and chemical states of the surface layers to reveal mutual agreement on all observations in PL, XPS, and UPS. We demonstrate variation of the surface structure of SA-ZNRs by scanning over a range of annealing temperatures and time to regulate the structure variation of SA-ZNRs, and their optical analyses agrees well with PL, XPS and UPS, which indicates the dependence of migration energy barriers on the depth from the surface of ZNR. The results reveal the well ZNRs formed at 570 °C and the further oxidation process and the formation of hydroperoxide on the Zn-rich surface of ZNRs at 640 °C.

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“…With rapid development of nanoscience during the past decade, many studies have become to be focused on oxidation of metal nanoparticles (NPs; see, e.g., recent experiments [26][27][28][29][30][31][32][33][34] and models [35][36][37][38][39][40][41][42][43]). Such NPs can often be easily fully converted into the oxide state, and accordingly the understanding of the mechanisms of their oxidation and its specifics compared to the macroscopic samples is interesting not only from the perspective of basic science but also crucial for their numerous applications in various fields ranging from electronics to medicine.…”

Section: Introductionmentioning

confidence: 99%

“…In macroscopic samples, the role of this effect is usually considered to be minor. The understanding of the mechanistic details of oxidation of metal NPs is now limited because accurate monitoring of oxidation on the nm scale is still challenging (see, e.g., already mentioned recent studies [26][27][28][29][30][31][32][33][34]).…”

Section: Introductionmentioning

confidence: 99%

Simulations of oxidation of metal nanoparticles with a grain boundary inside

Zhdanov

2020

Reac Kinet Mech Cat

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The generic 2D lattice Monte Carlo simulations presented herein are focused on the spatio-temporal kinetics of oxidation of metal nanoparticles composed of two grains separated by a single grain boundary. The oxidation is assumed to occur via inward diffusion of interstitial oxygen ions in the oxide. The results of simulations illustrate that the regimes of oxidation can range from one where the presence of grains is negligible and the oxide shell is formed at the periphery of a whole nanoparticle to one where each grain is oxidized almost independently.

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Controlled oxidation of aluminum nanoparticles

Cited by 34 publications

References 17 publications

Liquid Metals: A Novel Possibility of Fabricating 2D Metal Oxides

Liquid Metals: A Novel Possibility of Fabricating 2D Metal Oxides

Migration Energy Barriers for the Surface and Bulk of Self-Assembly ZnO Nanorods

Simulations of oxidation of metal nanoparticles with a grain boundary inside

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