Nanobubble-assisted formation of carbon nanostructures on basal plane highly ordered pyrolytic graphite exposed to aqueous media

Carbon nanoscrolls (CNSs) formed spontaneously on the basal plane of highly ordered pyrolytic graphite (HOPG) show winding and unwinding movements when potential steps from 0 V to −0.5 V, −0.6 V and −0.9 V are applied on HOPG immersed in an aqueous electrolyte solution (0.1 M H2SO4).

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High Rake Angle Orthogonal Machining of Highly Ordered Pyrolytic Graphite Parallel to the Basal Plane

Journal of Manufacturing Science and Engineering ◽

10.1115/1.4030756 ◽

2015 ◽

Vol 138 (1) ◽

Author(s):

B. Jayasena ◽

S. Subbiah ◽

C. D. Reddy

Keyword(s):

Basal Plane ◽

Pyrolytic Graphite ◽

Rake Angle ◽

Machining Process ◽

Dynamic Simulations ◽

Kink Bands ◽

Orthogonal Machining ◽

Highly Ordered Pyrolytic Graphite ◽

Graphite Sheets

High rake angle orthogonal machining of highly ordered pyrolytic graphite (HOPG) parallel to the basal plane was carried out to synthesize few layers of graphene. The quality of the graphite sheets was found to be an alliance of any pre-existing defects in the HOPG and the nature of the machining process itself. Presence of pre-existing defects such as kinks and discontinuous layers were observed during the lateral examination of HOPG structure prior to machining. Evidence of flat, folded, and rolled structures were found in exfoliated graphite sheets in addition to defects such as two types of kink bands. Multiple spikes in measured cutting forces were seen during machining due to disturbances in tool movement. Molecular dynamic simulations were carried out to support the argument that specific pre-existing defects such as discontinuous layers cause the marked disturbances during machining.

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Understanding the electrochemistry of “water-in-salt” electrolytes: basal plane highly ordered pyrolytic graphite as a model system

Chemical Science ◽

10.1039/d0sc01754j ◽

2020 ◽

Vol 11 (27) ◽

pp. 6978-6989 ◽

Cited By ~ 1

Author(s):

Pawin Iamprasertkun ◽

Andinet Ejigu ◽

Robert A. W. Dryfe

Keyword(s):

Basal Plane ◽

Pyrolytic Graphite ◽

Model System ◽

Concentrated Solutions ◽

Highly Ordered Pyrolytic Graphite ◽

System P ◽

The Stability ◽

Stability Of Water

The stability of water-in-salt electrolyte systems is investigated using highly concentrated solutions of KF(aq) with graphite as a model system.

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Capacitance of Basal Plane and Edge-Oriented Highly Ordered Pyrolytic Graphite: Specific Ion Effects

The Journal of Physical Chemistry Letters ◽

10.1021/acs.jpclett.8b03523 ◽

2019 ◽

Vol 10 (3) ◽

pp. 617-623 ◽

Cited By ~ 14

Author(s):

Pawin Iamprasertkun ◽

Wisit Hirunpinyopas ◽

Ashok Keerthi ◽

Bin Wang ◽

Boya Radha ◽

...

Keyword(s):

Basal Plane ◽

Pyrolytic Graphite ◽

Highly Ordered Pyrolytic Graphite ◽

Specific Ion Effects ◽

Ion Effects

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A Bottom-Up Approach to Solution-Processed, Atomically Precise Graphitic Cylinders on Surfaces

10.26434/chemrxiv.7158959 ◽

2018 ◽

Author(s):

Erik Leonhardt ◽

Jeff M. Van Raden ◽

David Miller ◽

Lev N. Zakharov ◽

Benjamin Aleman ◽

...

Keyword(s):

Self Assembly ◽

Carbon Nanostructures ◽

Carbon Nanomaterials ◽

Circle Packing ◽

Pyrolytic Graphite ◽

Building Blocks ◽

Bottom Up ◽

Casting Technique ◽

New Class ◽

Solution Casting Technique

Extended carbon nanostructures, such as carbon nanotubes (CNTs), exhibit remarkable properties but are difficult to synthesize uniformly. Herein, we present a new class of carbon nanomaterials constructed via the bottom-up self-assembly of cylindrical, atomically-precise small molecules. Guided by supramolecular design principles and circle packing theory, we have designed and synthesized a fluorinated nanohoop that, in the solid-state, self-assembles into nanotube-like arrays with channel diameters of precisely 1.63 nm. A mild solution-casting technique is then used to construct vertical “forests” of these arrays on a highly-ordered pyrolytic graphite (HOPG) surface through epitaxial growth. Furthermore, we show that a basic property of nanohoops, fluorescence, is readily transferred to the bulk phase, implying that the properties of these materials can be directly altered via precise functionalization of their nanohoop building blocks. The strategy presented is expected to have broader applications in the development of new graphitic nanomaterials with π-rich cavities reminiscent of CNTs.

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