硫醇协调软化液体金属颗粒,以提高按需导电性.
Benjamin N Muller1,2,3, Vivian R Feig2,3, Nicholas S Colella4
1Department of Chemistry and Chemical Biology, Northeastern University, Boston, Massachusetts 02115, United States.
ACS nano
|May 15, 2024
概括
硫醇表面活性剂和非极性溶剂使灵活电子产品中可调节的印 (EGaIn) 粒子的破裂成为可能. 这大大降低了压力传感器中机电驱动所需的应力.
科学领域:
- 材料科学 材料科学 材料科学
- 纳米技术 纳米技术
- 表面化学 表面化学
背景情况:
- 可调节粒子力学对于先进的灵活电子应用,如压力传感器至关重要.
- 优捷性印 (EGaIn) 颗粒具有独特的机电性能,但需要控制破裂才能发挥功能.
研究的目的:
- 调查醇表面活性剂和溶剂选择对EGaIn颗粒机械敏感性和破裂行为的影响.
- 优化EGaIn颗粒制备以提高灵活电子设备的性能.
主要方法:
- 在烯中用硫醇表面活性剂 (多德乙醇,乙醇) 制备EGaIn颗粒,并与以乙醇为基础的制剂进行比较.
- 使用传输电子显微镜 (TEM) 和X射线光电子光谱 (XPS) 分析氧化物增长的纳米尺度表征.
- 原子力显微镜 (AFM) 用于力缩曲线和导电性AFM (c-AFM) 用于单个粒子的电探测.
- 使用激光切除和扫描电子显微镜 (SEM) 结合电阻测量进行宏观表征.
主要成果:
- 硫醇表面活性剂和烯协同降低了对EGaIn颗粒的电机械激活所需的应力.
- 硫化抑制了氧化的形成,导致加剧的软化和破裂,与裸体颗粒相比,在40%较低的力下.
- 从宏观上看,化EGaIn颗粒在0.1W的激光功率下实现了电激活,远低于裸体颗粒 (需要3倍的功率).
结论:
- 合成条件,特别是在非极性溶剂中使用硫表面活性剂,使EGaIn颗粒的按需可调节的破裂成为可能.
- 这种方法显著提高了机电反应,降低了执行值,有利于灵活的电子应用.
- 优化EGaIn颗粒制备为开发高度灵敏和可靠的压力传感器提供了一条道路.
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