Molecular-scale Hydrophilicity Induced by Solute: Molecular-thick Charged Pancakes of Aqueous Salt Solution on Hydrophobic Carbon-based Surfaces
文献类型：期刊论文
| 作者 | Shi, GS ; Shen, Y ; Liu, J ; Wang, CL ; Wang, Y ; Song, B ; Hu, J ; Fang, HP |
| 刊名 | SCIENTIFIC REPORTS
 |
| 出版日期 | 2014 |
| 卷号 | 4 |
| 关键词 | ANION-P INTERACTIONS AROMATIC-HYDROCARBONS GRAPHENE OXIDE DRIVING-FORCE WETTING LAYER WATER NANOTUBES DYNAMICS CATION FILMS |
| ISSN号 | 2045-2322 |
| 通讯作者 | fanghaiping@sinap.ac.cn |
| 英文摘要 | We directly observed molecular-thick aqueous salt-solution pancakes on a hydrophobic graphite surface under ambient conditions employing atomic force microscopy. This observation indicates the unexpected molecular-scale hydrophilicity of the salt solution on graphite surfaces, which is different from the macroscopic wetting property of a droplet standing on the graphite surface. Interestingly, the pancakes spontaneously displayed strong positively charged behavior. Theoretical studies showed that the formation of such positively charged pancakes is attributed to cation-pi interactions between Na+ ions in the aqueous solution and aromatic rings on the graphite surface, promoting the adsorption of water molecules together with cations onto the graphite surface; i.e., Na+ ions as a medium adsorbed to the graphite surface through cation-pi interactions on one side while at the same time bonding to water molecules through hydration interaction on the other side at a molecular scale. These findings suggest that actual interactions regarding carbon-based graphitic surfaces including those of graphene, carbon nanotubes, and biochar may be significantly different from existing theory and they provide new insight into the control of surface wettability, interactions and related physical, chemical and biological processes. |
| 收录类别 | SCI |
| 语种 | 英语 |
| WOS记录号 | WOS:000343980500001 |
| 公开日期 | 2015-03-13 |
| 源URL | [http://ir.sinap.ac.cn/handle/331007/14251]  |
| 专题 | 上海应用物理研究所_中科院上海应用物理研究所2011-2017年 |
| 推荐引用方式 GB/T 7714 | Shi, GS,Shen, Y,Liu, J,et al. Molecular-scale Hydrophilicity Induced by Solute: Molecular-thick Charged Pancakes of Aqueous Salt Solution on Hydrophobic Carbon-based Surfaces[J]. SCIENTIFIC REPORTS,2014,4. |
| APA | Shi, GS.,Shen, Y.,Liu, J.,Wang, CL.,Wang, Y.,...&Fang, HP.(2014).Molecular-scale Hydrophilicity Induced by Solute: Molecular-thick Charged Pancakes of Aqueous Salt Solution on Hydrophobic Carbon-based Surfaces.SCIENTIFIC REPORTS,4. |
| MLA | Shi, GS,et al."Molecular-scale Hydrophilicity Induced by Solute: Molecular-thick Charged Pancakes of Aqueous Salt Solution on Hydrophobic Carbon-based Surfaces".SCIENTIFIC REPORTS 4(2014). |
入库方式： OAI收割
来源：上海应用物理研究所
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