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5 results on '"Yun-Xin Zhong"'

2. The Electric Double Layer in an Ionic Liquid Incorporated with Water Molecules: Atomic Force Microscopy Force Curve Study

Author

Mian-Gang Li, Li Chen, Yun-Xin Zhong, Jiawei Yan, and Bing-Wei Mao

Subjects
Kelvin probe force microscope, Atomic force microscopy, Electrostatic force microscope, Analytical chemistry, 02 engineering and technology, Conductive atomic force microscopy, 010402 general chemistry, 021001 nanoscience & nanotechnology, 01 natural sciences, Catalysis, 0104 chemical sciences, chemistry.chemical_compound, chemistry, Chemical physics, Ionic liquid, Electrochemistry, Molecule, Water chemistry, 0210 nano-technology, Photoconductive atomic force microscopy
Published
2016

3. Resolving Fine Structures of the Electric Double Layer of Electrochemical Interfaces in Ionic Liquids with an AFM Tip Modification Strategy

Author

Xiao Zhang, Dingwen He, Yun-Xin Zhong, Mian-Gang Li, Jiawei Yan, and Bing-Wei Mao

Subjects
Chemistry, Atomic force microscopy, Analytical chemistry, General Chemistry, Electrochemistry, Biochemistry, Catalysis, Force curves, chemistry.chemical_compound, Colloid and Surface Chemistry, Chemical physics, Ionic liquid, Layering, Selectivity
Abstract

We report enhanced force detection selectivity based on Coulombic interactions through AFM tip modification for probing fine structures of the electric double layer (EDL) in ionic liquids. When AFM tips anchored with alkylthiol molecular layers having end groups with different charge states (e.g., -CH3, -COO(-), and -NH3(+)) are employed, Coulombic interactions between the tip and a specified layering structure are intensified or diminished depending on the polarities of the tip and the layering species. Systematic potential-dependent measurements of force curves with careful inspection of layered features and thickness analysis allows the fine structure of the EDL at the Au(111)-OMIPF6 interface to be resolved at the subionic level. The enhanced force detection selectivity provides a basis for thoroughly understanding the EDL in ionic liquids.

Published
2014

4. Probing double layer structures of Au (111)-BMIPF6 ionic liquid interfaces from potential-dependent AFM force curves

Author

Jiawei Yan, Meng Zhang, Xiao Zhang, Yun-Xin Zhong, Yu-Zhuan Su, and Bing-Wei Mao

Subjects
Range (particle radiation), Chemistry, Atomic force microscopy, Metals and Alloys, Analytical chemistry, General Chemistry, Capacitance, Catalysis, Force curves, Surfaces, Coatings and Films, Electronic, Optical and Magnetic Materials, chemistry.chemical_compound, Chemical physics, Ionic liquid, Materials Chemistry, Ceramics and Composites, Molecule, Point of zero charge, Layering
Abstract

High quality AFM force curves are presented with detailed potential dependent layering behaviors of the ionic liquid molecules, from which charged interior and neutral exterior layers are distinguished. The electric double layer is confined within the interior layers of one to two molecular size within the potential range of up to 1 V negative of the PZC.

Published
2011

5. Resolving Fine Structures of the Electric Double Layer of Electrochemical Interfaces in Ionic Liquids with an AFM Tip Modification Strategy.

Author

Yun-Xin Zhong, Jia-Wei Yan, Mian-Gang Li, Xiao Zhang, Ding-Wen He, and Bing-Wei Mao

Subjects
*ELECTROCHEMICAL research, *COULOMB functions, *IONIC liquids, *THIOLS, *ELECTRIC double layer
Abstract

We report enhanced force detection selectivity based on Coulombic interactions through AFM tip modification for probing fine structures of the electric double layer (EDL) in ionic liquids. When AFM tips anchored with alkylthiol molecular layers having end groups with different charge states (e.g., -CH3, -COO-, and -NH3+) are employed, Coulombic interactions between the tip and a specified layering structure are intensified or diminished depending on the polarities of the tip and the layering species. Systematic potential-dependent measurements of force curves with careful inspection of layered features and thickness analysis allows the fine structure of the EDL at the Au(111)-OMIPF6 interface to be resolved at the subionic level. The enhanced force detection selectivity provides a basis for thoroughly understanding the EDL in ionic liquids. [ABSTRACT FROM AUTHOR]

Published
2014
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