Affinity transformation from hydrophilicity to hydrophobicity of water molecules on the basis of adsorption of water in graphitic nanopores.
Affinity transformation from hydrophilicity to hydrophobicity of water molecules on the basis of adsorption of water in graphitic nanopores.
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DOI：
10.1021/ja038842w
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发表时间：
2004-01
影响因子：
15
通讯作者：
T. Ohba;H. Kanoh;K. Kaneko
中科院分区：
文献类型：
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作者：
T. Ohba;H. Kanoh;K. Kaneko
水与疏水表面的相互作用在各种化学和生物化学现象中是非常重要的。通过引入表面活性剂可以实现水和油的共存。在石墨纳米孔上吸附水蒸气的情况下，尽管石墨表面不是亲水性的，但是在没有表面活性剂的情况下，大量的水可以被吸附在石墨纳米孔中。为什么水分子在疏水性纳米孔中吸附显著？这项工作可以通过实验和理论方法对疏水石墨纳米孔中的水吸附进行明确的了解。水分子彼此缔合以形成尺寸为lnm的簇，导致簇在石墨纳米孔中的显著稳定。该机理可广泛应用于水与疏水性纳米结构材料共存的界面现象。
The interaction of water with hydrophobic surfaces is quite important in a variety of chemical and biochemical phenomena. The coexistence of water and oil can be realized by introduction of surfactants. In the case of water vapor adsorption on graphitic nanopores, plenty of water can be adsorbed in graphitic nanopores without surfactants, although the graphitic surface is not hydrophilic. Why are water molecules adsorbed in hydrophobic nanopores remarkably? This work can give an explicit insight to water adsorption in hydrophobic graphite nanopores using experimental and theoretical approaches. Water molecules are associated with each other to form the cluster of 1 nm in size, leading to a significant stabilization of the cluster in the graphitic nanopores. This mechanism can be widely applied to interfacial phenomena relating to coexistence of water and nanostructural materials of hydrophobicity.