Aluminum Nanocrystals Form Voids under Their Native Oxide.

IF 9.6 1区材料科学 Q1 CHEMISTRY, MULTIDISCIPLINARY

Nano Letters Pub Date : 2025-07-24 DOI:10.1021/acs.nanolett.5c02981

Christian R Jacobson,Aliyu Ahmad,Ang Tao,Xu Qi,Aaron Bayles,Adebola Ogundare,Yimo Han,Henry O Everitt,Naomi J Halas

引用次数: 0

Abstract

Aluminum, the most abundant metal in the earth's crust, is protected and stabilized by a native surface oxide layer. Once the oxide is breached, rapid oxidation can occur, igniting Al in particulate form. By slowly heating and cooling Al nanocrystals of well controlled size and shape, we observe a localized void formation under the surface oxide, occurring on specific crystalline facets. These voids form during the slow cooling phase following heating, even for temperatures below the threshold of oxidation, in a manner sensitive to Al nanocrystal size and morphology, surface facet, and the degree of oxide porosity. Because of these sensitivities, this void formation may provide new strategies for modifying Al nanocrystal growth and developing Al nanocrystal-based hybrid materials.

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铝纳米晶体在其原生氧化物下形成空洞。

铝是地壳中最丰富的金属，它受到天然表面氧化层的保护和稳定。一旦氧化物被破坏，就会发生快速氧化，点燃颗粒形式的铝。通过缓慢加热和冷却控制尺寸和形状的Al纳米晶体，我们观察到在表面氧化物下的局部空洞形成，发生在特定的晶体切面上。这些空洞在加热后的缓慢冷却阶段形成，甚至在低于氧化阈值的温度下，以一种对Al纳米晶尺寸和形态、表面facet以及氧化物孔隙度敏感的方式形成。由于这些敏感性，这种空洞的形成可能为改变Al纳米晶的生长和发展Al纳米晶基杂化材料提供新的策略。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Nano Letters 工程技术-材料科学：综合

CiteScore

16.80

自引率

2.80%

发文量

1182

审稿时长

1.4 months

期刊介绍： Nano Letters serves as a dynamic platform for promptly disseminating original results in fundamental, applied, and emerging research across all facets of nanoscience and nanotechnology. A pivotal criterion for inclusion within Nano Letters is the convergence of at least two different areas or disciplines, ensuring a rich interdisciplinary scope. The journal is dedicated to fostering exploration in diverse areas, including: - Experimental and theoretical findings on physical, chemical, and biological phenomena at the nanoscale - Synthesis, characterization, and processing of organic, inorganic, polymer, and hybrid nanomaterials through physical, chemical, and biological methodologies - Modeling and simulation of synthetic, assembly, and interaction processes - Realization of integrated nanostructures and nano-engineered devices exhibiting advanced performance - Applications of nanoscale materials in living and environmental systems Nano Letters is committed to advancing and showcasing groundbreaking research that intersects various domains, fostering innovation and collaboration in the ever-evolving field of nanoscience and nanotechnology.