Unlocking Superlubricity: Ionic Liquids Meet Perfluorocarbons

IF 9.1 1区材料科学 Q1 CHEMISTRY, MULTIDISCIPLINARY

Nano Letters Pub Date : 2025-06-02 DOI:10.1021/acs.nanolett.5c0185110.1021/acs.nanolett.5c01851

Ruirui He, Yumiao Lu*, Ju Liu, Yanlei Wang, Wei-Lu Ding, Kaixuan Li, Yibo Wang* and Hongyan He*,

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Abstract

Superlubricity, a state of near-zero friction, offers transformative potential for minimizing energy dissipation and mechanical wear. However, realizing stable superlubricity has remained challenging due to difficulties in sustaining reliable lubricant structures. In this work, we present a feasible and straightforward strategy that integrates ionic liquids with trace amounts of low-surface-energy perfluorocarbon, yielding a robust and highly ordered monolayer film. This composite system achieves an unprecedented friction coefficient as low as 10^–4, unlocking superlubricity. Furthermore, we clarify that the exceptional lubrication performance arises from precise modulation of adhesion forces at the molecular level. Our findings not only demonstrate a practical pathway to stable superlubricity but also provide fundamental insights into the underlying friction mechanisms, guiding the rational design of advanced lubricant systems with extraordinary performance and durability, which are particularly suitable for graphite-based microelectromechanical devices.

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解锁超润滑性：离子液体遇上全氟碳化合物

超润滑，一种接近零摩擦的状态，提供了最大限度地减少能量消耗和机械磨损的变革潜力。然而，由于难以维持可靠的润滑剂结构，实现稳定的超润滑仍然具有挑战性。在这项工作中，我们提出了一种可行且直接的策略，将离子液体与微量的低表面能全氟碳化合物结合在一起，产生坚固且高度有序的单层膜。该复合系统实现了前所未有的低至10-4的摩擦系数，解锁了超润滑。此外，我们澄清了卓越的润滑性能源于分子水平上粘附力的精确调制。我们的研究结果不仅展示了稳定超润滑的实用途径，而且为潜在的摩擦机制提供了基本的见解，指导了具有非凡性能和耐久性的先进润滑系统的合理设计，特别是适用于石墨基微机电设备。

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.