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Journal Article
Between Scylla and Charybdis: Hydrophobic Graphene-Guided Water Diffusion on Hydrophilic Substrates
- Authors
- Jin-Soo Kim, Jin Sik Choi, Mi Jung Lee, Bae Ho Park, Danil Bukhvalov, Young-Woo Son, Duhee Yoon, Hyeonsik Cheong, Jun-Nyeong Yun, Yousung Jung, Jeong Young Park, Miquel Salmeron
- Issue Date
- 2013-07
- Citation
- Scientific Reports, v.3, pp.1-6
- ISSN
- 2045-2322
- Publisher
- Nature Publishing Group
- Language
- English
- Type
- Journal Article
- Abstract
- The structure of water confined in nanometer-sized cavities is important because, at this scale, a large fraction of hydrogen bonds can be perturbed by interaction with the confining walls. Unusual fluidity properties can thus be expected in the narrow pores, leading to new phenomena like the enhanced fluidity reported in carbon nanotubes. Crystalline mica and amorphous silicon dioxide are hydrophilic substrates that strongly adsorb water. Graphene, on the other hand, interacts weakly with water. This presents the question as to what determines the structure and diffusivity of water when intercalated between hydrophilic substrates and hydrophobic graphene. Using atomic force microscopy, we have found that while the hydrophilic substrates determine the structure of water near its surface, graphene guides its diffusion, favouring growth of intercalated water domains along the C-C bond zigzag direction. Molecular dynamics and density functional calculations are provided to help understand the highly anisotropic water stripe patterns observed.
- KSP Keywords
- Amorphous silicon dioxide, Atomic force microscope(AFM), C-C bond, Carbon nano-tube(CNT), Constant current(CC), Density functional calculations, Hydrophilic substrates, Intercalated water, Molecular dynamics(MD), Narrow pores, Stripe patterns
This work is distributed under the term of Creative Commons License (CCL)
(CC BY NC ND)
(CC BY NC ND)
