Molecular-scale Hydrophilicity Induced by Solute: Molecular-thick Charged Pancakes of Aqueous Salt Solution on Hydrophobic Carbon-based Surfaces

CORC > 青海盐湖研究所 > 中国科学院青海盐湖研究所 > 青海盐湖研究所知识仓储

	Molecular-scale Hydrophilicity Induced by Solute: Molecular-thick Charged Pancakes of Aqueous Salt Solution on Hydrophobic Carbon-based Surfaces
	Shi, Guosheng 1,2; Shen, Yue 1,2,3; Liu, Jian 1,2,4; Wang, Chunlei 1,2; Wang, Ying 1,2; Song, Bo 1,2; Hu, Jun 1,2; Fang, Haiping 1,2
刊名	SCIENTIFIC REPORTS
	2014-10-28
卷号	4
文献子类	Article
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.
WOS关键词	ANION-P INTERACTIONS ; AROMATIC-HYDROCARBONS ; GRAPHENE OXIDE ; DRIVING-FORCE ; WETTING LAYER ; WATER ; NANOTUBES ; DYNAMICS ; CATION ; FILMS
WOS研究方向	Science & Technology - Other Topics
语种	英语
WOS记录号	WOS:000343980500001
内容类型	期刊论文
源URL	[http://ir.isl.ac.cn/handle/363002/5735]
专题	青海盐湖研究所_青海盐湖研究所知识仓储中国科学院青海盐湖研究所
作者单位	1.Chinese Acad Sci, Shanghai Inst Appl Phys, Div Interfacial Water, Shanghai 201800, Peoples R China 2.Chinese Acad Sci, Shanghai Inst Appl Phys, Key Lab Interfacial Phys & Technol, Shanghai 201800, Peoples R China 3.Chinese Acad Sci, Qinghai Inst Salt Lakes, Salt Lake Resources & Chem Lab, Xining 810008, Peoples R China 4.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
推荐引用方式 GB/T 7714	Shi, Guosheng,Shen, Yue,Liu, Jian,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, Guosheng.,Shen, Yue.,Liu, Jian.,Wang, Chunlei.,Wang, Ying.,...&Fang, Haiping.(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, Guosheng,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).