Electrochemistry of Highly Ordered Pyrolytic Graphite Surface Film Formation Observed by Atomic Force Microscopy

1997 ◽  
Vol 144 (12) ◽  
pp. 4161-4169 ◽  
Author(s):  
Andrew C. Chu ◽  
Jack Y. Josefowicz ◽  
Gregory C. Farrington
Keyword(s):  
Atomic Force Microscopy ◽  
Film Formation ◽  
Surface Film ◽  
Pyrolytic Graphite ◽  
Graphite Surface ◽  
Force Microscopy ◽  
Atomic Force ◽  
Highly Ordered Pyrolytic Graphite

scholarly journals Atomic Force Microscopy for Understanding Solvent Cointercalation into Graphite Electrode in Lithium Secondary Batteries

2015 ◽  
Vol 2015 ◽  
pp. 1-6 ◽  
Author(s):  
Yang-Soo Kim ◽  
Soon-Ki Jeong
Keyword(s):  
Atomic Force Microscopy ◽  
Morphological Changes ◽  
Film Formation ◽  
Surface Film ◽  
Pyrolytic Graphite ◽  
Electrode Reaction ◽  
Lithium Secondary Batteries ◽  
Force Microscopy ◽  
Atomic Force

The electrochemical processes occurring at the surface of a highly ordered pyrolytic graphite (HOPG) electrode were investigated byin situatomic force microscopy (AFM) to understand the solvent cointercalation involved in the formation of a surface film. AFM images were recorded under the conditions that AFM probe does not affect the electrode reaction. The AFM images show the morphological changes occurring at the electrode surface, indicating that two different types of reactions occurred in the film formation at the surface of the electrode. The formation of a blister structure was observed on the graphite surface, because of the decomposition of solvated lithium ions produced in the electrolyte solution and intercalation between the graphite layer and particulate materials. The solvent cointercalation reaction leading to the blister structure was more pronounced for the HOPG electrode with a higher value of mosaic spread.

scholarly journals Nanostructure of [Li(G4)] TFSI and [Li(G4)] NO3solvate ionic liquids at HOPG and Au(111) electrode interfaces as a function of potential

2015 ◽  
Vol 17 (1) ◽  
pp. 325-333 ◽  
Author(s):  
Ben McLean ◽  
Hua Li ◽  
Ryan Stefanovic ◽  
Ross J. Wood ◽  
Grant B. Webber ◽  
...  
Keyword(s):  
Atomic Force Microscopy ◽  
Ionic Liquid ◽  
Ionic Liquids ◽  
Double Layer ◽  
Pyrolytic Graphite ◽  
Force Measurements ◽  
Force Microscopy ◽  
Electrode Surfaces ◽  
Atomic Force ◽  
Highly Ordered Pyrolytic Graphite

Atomic force microscopy (AFM) force measurements have been used to study the solvate ionic liquid (IL) double layer nanostructure at highly ordered pyrolytic graphite (HOPG) and Au(111) electrode surfaces as a function of potential.

Adsorption of human serum albumin onto highly orientated pyrolytic graphite surface studied by atomic force microscopy

Scanning ◽  
2015 ◽  
Vol 37 (2) ◽  
pp. 158-164 ◽  
Author(s):  
XIAO Peng ◽  
HAORAN Fu ◽  
Ruisi Liu ◽  
Lin Zhao ◽  
Yuangang Zu ◽  
...  
Keyword(s):  
Atomic Force Microscopy ◽  
Human Serum Albumin ◽  
Serum Albumin ◽  
Human Serum ◽  
Pyrolytic Graphite ◽  
Graphite Surface ◽  
Force Microscopy ◽  
Atomic Force

Nanopatterning Graphite Surface by Diazoniums Using Electrochemical Method

2021 ◽  
Vol 11 (1) ◽  
pp. 44-48
Author(s):  
Hai Phan Thanh ◽  
Hieu Vo Minh ◽  
Dien Nguyen Duy ◽  
Tinh Hoang Van ◽  
Trung Huynh Thi Mien
Keyword(s):  
Atomic Force Microscopy ◽  
Electronic Properties ◽  
Self Assembly ◽  
Electrochemical Method ◽  
Pyrolytic Graphite ◽  
Graphite Surface ◽  
Covalent Functionalization ◽  
Force Microscopy ◽  
Cyclic Voltametry ◽  
Atomic Force

Molecular functionalization of graphitic surfaces with nanopatterned structures is regarded as one of the effective bottom-up techniques to tune their electronic properties towards electronics applications. Diazonium molecules have been often employed to covalently functionalize graphene and highly oriented pyrolytic graphite (HOPG) substrates. However, controlling the structure of the molecular adlayers is still challenging. In this contribution, we demonstrated an inconventional approach for covalent functionalization the HOPG surface by using mixture of 4-nitrobenzenediazonium (4-NBD) and 3,5-bis-tert-butylbenzenediazonium (3,5-TBD) molecules in which the former tends to polimezise and physisorb while the later chemically anchors on surface. The physisorbed features can be removed by washing with hot toluene and water. As a result, the HOPG surface is patterned in a quasi-periodic fashion. The efficiency of this development was verified by a combination of cyclic voltametry (CV) and atomic force microscopy (AFM) methods. This finding represents a convenient strategy for creating nanoconfined templates that might serve as nano-playgrounds for further supramolecular self-assembly and other on-surface reactions.

Effects of Dimethoxyethane as a Co-Solvent on Electrochemical Formation of a Surface Film on Graphite in an Ethylene Carbonate-Based Solution

2016 ◽  
Vol 705 ◽  
pp. 133-137
Author(s):  
Soon Ki Jeong
Keyword(s):  
Film Formation ◽  
Surface Film ◽  
Ethylene Carbonate ◽  
Pyrolytic Graphite ◽  
Reduction Peak ◽  
Potential Cycling ◽  
Force Microscopy ◽  
Atomic Force ◽  
Solvent Molecules ◽  
Pyrolytic Graphite Electrode

The electrochemical processes occurring at the surface of a highly ordered pyrolytic graphite electrode were investigated, to understand the effects of dimethoxyethane as a co-solvent on the formation of a surface film. In-situ electrochemical atomic force microscopy revealed that a thin film of ~5 nm thickness was formed on the graphite surface after the first potential cycling. There was no evidence of co-intercalation of the solvent molecules. The cyclic voltammetry analysis revealed that a irreversible reduction peak closely related to the film formation was present at ~1.7 V vs. Li+/Li.

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