通过封闭的单层水完全排除离子和质子传输
K Gopinadhan1,2,3, S Hu2, A Esfandiar1,4
1School of Physics and Astronomy, University of Manchester, Manchester M13 9PL, UK.
Science (New York, N.Y.)
|January 12, 2019
概括
研究人员为高度选择性水运输创造了原子级毛细血管. 这些结构允许水和质子通过,但阻断离子,模仿自然的水素进行先进的过.
科学领域:
- 材料科学
- 纳米技术
- 物理化学
背景情况:
- 一个长期以来的目标是模仿天然的蛋白质道,
- 现有的纳米级毛孔和毛细血管通常比生物通道大,限制了它们的效率.
- 在分子运输人工结构中实现原子级精度仍然是一个重大挑战.
研究的目的:
- 为了精确的分子运输控制,设计具有原子尺寸 (几安格斯特罗姆) 的人造毛细血管.
- 通过这些安格斯特罗姆尺度裂调查水,离子 (Na+,Cl-) 和质子 (H+) 的选择性透.
- 进一步了解原子尺度上的分子运输机制.
主要方法:
- 通过从大量晶体中提取单个原子平面来制造毛细血管,从而创建二维裂.
- 通过氏级毛细血管测量水,离子 (Na+,Cl-) 和质子 (H+) 的透率.
- 在原子尺度上分析运输特性.
主要成果:
- 水通过斯特罗姆尺度的毛细血管迅速透, 阻力最小.
- 没有检测到水合 (Na+) 和 (Cl-) 离子的透,即使在小尺寸.
- 质子 (H+) 通过毛细血管中的单层水扩散.
结论:
- 原子级毛细血管可以被设计成具有高度选择性的运输,允许水和质子通过,同时拒绝离子.
- 这些发现为研究和控制原子尺寸的极限分子运输提供了一个新的平台.
- 结果提供了对人工系统和生物通道相关的过和传输基本原理的见解.
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