在带有边缘功能化的六角化膜中进行透性质子运输
Anjan Das1, Vikas Yadav1, C V Krishnamurthy1
1Department of Physics, Indian Institute of Technology Madras Chennai 600036 India manu.jaiswal@iitm.ac.in cvkm@iitm.ac.in.
Nanoscale advances
|September 14, 2023
概括
在功能化的六角化 (h-BN) 膜中,质子传输显示了导电率的显著增加,即使使用了最小的水. 这是由于独特的边缘导电通道,而不是水的插入.
科学领域:
- 材料科学 材料科学 材料科学
- 纳米技术 纳米技术
- 物理化学 物理化学
背景情况:
- 两维的分层材料对于研究水和离子动态至关重要.
- 六角化 (h-BN) 是一种关键的二维材料,在离子运输中具有潜在的应用.
研究的目的:
- 在水合下研究功能化h-BN膜中的质子运输机制.
- 了解边缘功能化和水含量对导电性的作用.
主要方法:
- 胺功能化的h-BN膜的制造.
- 液化和水吸附测量. 水分和水吸附测量.
- 在不同的水负载下测量质子导电性.
- 分析层间距离和运输现象.
主要成果:
- 水没有改变h-BN的层间距,表明没有水间隔.
- 氨基功能化增加了18倍的水吸收.
- 在<5%的水负载下,质子导电率增加了7个数量级.
- 观察到的低透值和非通用临界指数表明边缘主导的运输.
结论:
- 在h-BN膜中,质子运输主要由功能化的边缘控制,而不是大量的间隙.
- 边缘导电通道使高质子导电性,即使在非常低的水化水平.
- 导电性的异常厚度依赖性需要进一步研究传输机制.
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