Bubbling Chemical Vapors in Molten Metal toward XIV-Group Nanosheets.

IF 9.6 1区材料科学 Q1 CHEMISTRY, MULTIDISCIPLINARY Nano Letters Pub Date : 2024-11-06 DOI:10.1021/acs.nanolett.4c02514

Zhenjiang Cao, Zhiguo Du, Kai Jia, Li Jin, Na Li, Miao Zhang, Rui Gao, Amr Abdelkader, R Vasant Kumar, Shujiang Ding, Kai Xi, Shubin Yang

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Abstract

Two-dimensional (2D) XIV-group nanosheets (germanene, silicene, and stannene) possess unique physical and chemical features promising in fields of electronics, energy storage, and conversions. However, preparing these nanosheets is challenging owing to their non van der Waals structure with strong chemical bonds inside. Herein, a bubbling chemical-vapor growth method is proposed to synthesize these XIV-group nanosheets by bubbling XIV-group-element chlorides in molten sodium. During the synthetic process, XIV-group materials are formed by the reaction of XIV-group element chlorides with strong reducing sodium, then nucleated, and finally isolated to 2D nanosheets in the gas-liquid interface. With the collapse of vapor bubbles and subsequent injection, 2D nanosheets are continuously produced. The nanosheets (Ge) possess a thickness of ∼3.8 nm and a lateral size of ∼2.0 μm. Combining with graphene, the hybrid and flexible films are obtained, delivering a volumetric specific capacity of 4785 mAh cm^-3 and superior cycling stability (over 4000 cycles) in lithium-ion batteries.

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熔融金属中的气泡化学蒸汽向 XIV 族纳米片迁移。

二维（2D）XIV 族纳米片（锗烯、硅烯和锡烯）具有独特的物理和化学特性，在电子、能量存储和转换领域大有可为。然而，由于这些纳米片内部具有强化学键的非范德华结构，制备这些纳米片具有挑战性。本文提出了一种鼓泡化学气相生长法，通过在熔融钠中鼓泡 XIV 族元素氯化物来合成这些 XIV 族纳米片。在合成过程中，XIV 族材料由 XIV 族元素氯化物与强还原性钠反应形成，然后成核，最后在气液界面中分离成二维纳米片。随着气泡的坍塌和随后的注入，二维纳米片不断产生。纳米片（Ge）的厚度为 3.8 纳米，横向尺寸为 2.0 微米。通过与石墨烯的结合，获得了混合柔性薄膜，在锂离子电池中可提供 4785 mAh cm-3 的体积比容量和卓越的循环稳定性（超过 4000 次循环）。

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.