A quartz crystal microbalance (QCM) technique has been employed to tune friction at liquid–solid interfaces with tribotronic methods employing externally applied electric fields in both nanoparticle suspensions and ionic liquid systems. The setup consists of a QCM immersed in liquid containing electrically charged constituents whose sensing electrode faces a nearby counter electrode. An electric field perpendicular to the QCM surface is created when a potential is applied between the two electrodes, which allows the charged constituents in the surrounding liquid to be repositioned. QCM measurements are able to detect differences in friction under various field conditions, and thus detectably tune the friction in both nanoparticle and ionic liquid systems. The versatility and simplicity of QCM friction measurements render it an ideal tool for the rapidly expanding research area of tribotronics.

Graphical Abstract

中文翻译：

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离子液体和纳米颗粒悬浮液中摩擦电子控制的 QCM 研究

石英晶体微量天平 (QCM) 技术已被用于通过在纳米颗粒悬浮液和离子液体系统中使用外部施加电场的摩擦电子方法来调节液固界面的摩擦力。该设置包括一个浸入含有带电成分的液体中的QCM，其感应电极面对附近的对电极。当在两个电极之间施加电势时，会产生垂直于 QCM 表面的电场，这允许重新定位周围液体中的带电成分。QCM 测量能够检测各种现场条件下的摩擦差异，从而可检测地调整纳米粒子和离子液体系统中的摩擦。

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