内容简介
本研究论文聚焦于一种基于混配位电子俘获效应的互电容式触摸屏及其应用的探究。触摸屏，作为数字化时代的代表器件类型，在可穿戴设备中扮演着至关重要的角色。新型碳纳米材料（如碳纳米管、石墨烯等）为研发高性能柔性触摸屏提供了新路径。然而，当这些材料与柔性基板堆叠以形成电容触摸传感器时，常常会在受形变时发生材料-基板剥离现象，导致触摸屏识别失准，降低柔性触摸屏应用范围。在本研究中，我们使用电子回旋共振系统（ECR）在柔性基板上直接原位沉积了石墨烯-金属纳米薄膜（GMNF），避免了材料-基板剥离现象的发生。通过该方法制备出的基于感应电荷的互电容式触摸传感器，能够实现高精度的触摸感应，极大地拓展了触摸屏的应用范围。在GMNF中，铜纳米粒子和垂直生长的石墨烯纳米片之间形成的混配位使得该材料具有电子俘获效应。它们紧密地附着在柔性基板上，经过3000次弯折后，触摸灵敏度未发生明显降低。基于此器件的交互触摸系统具有41.16 dB的高信噪比和650 dpi的分辨率。通过手写中文字符识别测试，该触控系统对中文字符识别准确率高达94.82%。这些结果显示了直接沉积制备的GMNF触摸屏传感器具有极佳的稳定性和识别能力，在可穿戴设备方面具有良好的应用前景。
引用本文（点击最下方阅读原文可下载PDF）
Zhang X, Ma J, Deng H, et al., 2024. A mixed-coordination electron trapping-enabled high-precision touch-sensitive screen for wearable devices. Bio-des Manuf 7(4):413–427. https://doi.org/10.1007/s42242-024-00293-3
文章导读
图1 电子回旋共振（ECR）系统及基于感应电荷的互电容式触摸屏总览
图2 石墨烯金属纳米薄膜表征
图3 单个互点容式传感器
图4 触摸屏测试
图5 基于该触摸屏的手写汉字识别
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