Phase-pure MgCu₂ and high-purity Mg₂Cu have been synthesised within 1 min from elemental powders via the microwave-induced metal plasma (MIMP) approach for the first time. Subsequent room temperature, acidic de-alloying led to 3-dimensional nanoporous (NP) Cu within minutes. Each distinctive metallic matrix exhibited a large surface area with a porosity of either 37.47% (from MgCu₂) or 56.25% (from Mg₂Cu). Both NP Cu powders are composed of crystalline grains (“ligaments”) measuring tens of nanometers across, which exhibit rich point- and extended defects. The selection of Laves precursor dictates the form of ligament obtained, which directs the ensuing NP structure. Working electrodes of both types of NP Cu presented reliable linear non-enzymatic sensing properties over glucose concentrations of 0.5–4.5 and 4.5–10.0 mM with high confidence levels (>99%). This study provides a facile, rapid and energy-efficient route to functional NP Cu with eclectic structures, which should be equally applicable to other metals.

中文翻译：

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MgCu2 和 Mg2Cu Laves 相的超快速合成及其向孔隙率可控的纳米结构铜的轻松转化；一个节能、可逆的过程

首次通过微波诱导金属等离子体 (MIMP) 方法从元素粉末中在 1 分钟内合成了相纯 MgCu ₂和高纯 Mg ₂ Cu 。随后的室温下，酸性脱合金在几分钟内产生了 3 维纳米多孔 (NP) Cu。每个独特的金属基体都表现出较大的表面积，孔隙率为 37.47%（来自 MgCu ₂）或 56.25%（来自 Mg ₂铜）。两种 NP Cu 粉末均由直径为数十纳米的晶粒（“韧带”）组成，具有丰富的点缺陷和扩展缺陷。Laves 前体的选择决定了所获得的韧带的形式，它指导了随后的 NP 结构。两种类型的 NP Cu 的工作电极在 0.5-4.5 和 4.5-10.0 mM 的葡萄糖浓度下表现出可靠的线性非酶传感特性，具有高置信度（> 99%）。该研究为具有折衷结构的功能性 NP Cu 提供了一种简便、快速和节能的途径，该途径应该同样适用于其他金属。