Confined Water-Assistant Thermal Response of a Graphene Oxide Heterostructure and Its Enabled Mechanical Sensors for Load Sensing and Mode Differentiation
Confined Water-Assistant Thermal Response of a Graphene Oxide Heterostructure and Its Enabled Mechanical Sensors for Load Sensing and Mode Differentiation
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DOI：
10.1021/acsami.9b02629
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发表时间：
2019-05-29
影响因子：
9.5
通讯作者：
Xu, Baoxing
中科院分区：
文献类型：
--
作者：
Gao, Yuan;Zhang, Yue;Xu, Baoxing
机械响应特性在设计能够感测和区分负载的机械传感器中是必不可少的。我们提出了一个异质结构组成的双层氧化石墨烯和承压水作为一个机械传感器，使检测和区分的张力，压缩，压力和弯曲。在分子模拟的指导下，我们证明了由于受限水分子和氧化石墨烯之间的氢键网络的可逆响应，固液界面的热传输对加载模式是敏感的，并通过将热导率、氢键数量和分布以及界面能与机械载荷相关联来定量地阐明热传输机制。这种结构使能的机械传感器具有对不同加载模式的对比热响应，其被设计为增强感测功能的鲁棒性。这些结果为合理设计机械传感器奠定了基础，这些传感器利用固液系统的热响应，超越了目前依赖于单一固体的电特性的策略。
Mechanically responsive features are essential in devising mechanical sensors capable of sensing and differentiating loadings. We present a heterostructure composed of bilayer graphene oxides and confined water as a mechanical sensor that enables the detection and differentiation of tension, compression, pressure, and bending. Guided by molecular simulations, we demonstrate that the thermal transport across solid-liquid interfaces is sensitive to loading modes owing to the reversible response of hydrogen bonding networks between confined water molecules and graphene oxides and quantitatively elucidate the thermal transport mechanism by correlating the thermal conductance, number, and distribution of hydrogen bonds and interfacial energy with mechanical loadings. Such structure-enabled mechanical sensor with contrasting thermal response to different loading modes is devised to exemplify the robustness of sensing functions. These results lay a foundation for rational designs of mechanical sensors that leverage the thermal response of solid-liquid systems beyond the current strategy relying on the electrical properties of sole solids.