石墨烯的缺陷工程用于动态可靠性
Boran Kumral1, Pedro Guerra Demingos2, Teng Cui1,3
1Department of Mechanical & Industrial Engineering, University of Toronto, 5 King's College Road, Toronto, ON, M5S 3G8, Canada.
Small (Weinheim an der Bergstrasse, Germany)
|June 9, 2023
概括
具有可控缺陷的功能化石墨烯显著增强了对聚合物基板的粘附性. 这种改进的接口可以防止损坏,使灵活的电子产品能够使用坚固的二维 (2D) 材料.
科学领域:
- 材料科学 材料科学 材料科学
- 纳米技术 纳米技术
- 表面科学是一门学科.
背景情况:
- 两维 (2D) 材料和软聚合物基板之间的接口对于灵活的设备性能至关重要.
- 这些接口的弱范德瓦尔斯力和弹性不匹配导致在动态负载下滑动和损坏.
- 当前的二维材料-聚合物接口缺乏可靠的灵活电子应用所需的强度.
研究的目的:
- 通过可控缺陷工程来增强石墨烯和聚合物基板之间的粘附性.
- 调查粘附改善的基础机制及其在动态应力下对界面完整性的影响.
- 为了能够开发动态可靠和强大的2D材料-聚合物接触,用于先进的灵活设备.
主要方法:
- 通过轻度和受控的缺陷工程来实现石墨烯功能化.
- 使用基于曲的计量学进行试验粘附特性.
- 分子动力学模拟以阐明粘附缺陷的作用.
- 在现场进行循环负荷实验,以评估界面疲劳和损伤传播.
主要成果:
- 通过缺陷工程实现了在石墨烯聚合物接口的粘附率的五倍增加.
- 证明增强的附着性在循环负荷下抑制了在石墨烯网格内的损伤启动和传播.
- 分子动力学模拟证实了个别缺陷对改善界面粘附的贡献.
结论:
- 控制缺陷工程是一种有效的策略,可以显著增强石墨烯聚合物界面粘附.
- 改进的粘附性导致优越的疲劳耐受性,并防止在2D材料-聚合物系统的界面损伤.
- 这项研究为创建下一代基于二维材料的灵活设备所必需的强大和动态可靠的接口提供了途径.
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