4.8 Article

Two-Dimensional Water Diffusion at a Graphene-Silica Interface

期刊

JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
卷 136, 期 18, 页码 6634-6642

出版社

AMER CHEMICAL SOC
DOI: 10.1021/ja4121988

关键词

-

资金

  1. Kyung Hee University [KHU-20090749]
  2. National Research Foundation of Korea [NRF-2011-0031630, NRF-2012R1A1A2043136]
  3. National Research Foundation of Korea [22A20130012112, 2012R1A1A2043136, 2011-0031630] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)

向作者/读者索取更多资源

Because of the dominant role of the surface of molecules and their individuality, molecules behave distinctively in a confined space, which has far-reaching implications in many physical, chemical, and biological systems. Here we demonstrate that graphene forms a unique atom-thick interstitial space that enables the study of molecular diffusion in two dimensions with underlying silica substrates. Raman spectroscopy visualized intercalation of water from the edge to the center underneath graphene in real time, which was dictated by the hydrophilicity of the substrates. In addition, graphene undergoes reversible deformation to conform to intercalating water clusters or islands. Atomic force microscopy confirmed that the interfacial water layer is only ca. 3.5 angstrom thick, corresponding to one bilayer unit of normal ice. This study also demonstrates that oxygen species responsible for the ubiquitous hole doping are located below graphene. In addition to serving as a transparent confining wall, graphene and possibly other two-dimensional materials can be used as an optical indicator sensitive to interfacial mass transport and charge transfer.

作者

我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。

评论

主要评分

4.8
评分不足

次要评分

新颖性
-
重要性
-
科学严谨性
-
评价这篇论文

推荐

暂无数据
暂无数据