Electronic and magnetic properties of zigzag-edged hexagonal graphene ring nanojunctions

Wang, D.; Zhang, Z.; Zhang, Jinzhong; Deng, X.Q.; Fan, Zhi‐Qiang; Tang, Guangze

doi:10.1016/j.carbon.2015.07.082

Cited by 10 publications

(1 citation statement)

References 46 publications

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“…License: CC BY 4.0 strategies are embedded in software that comes with potentiostat and are based on hardware compensation [53]. Graphene has high and low electrical conductivity parallel and perpendicular to planes of hexagonal rings, respectively [54]. Moreover, defects in the extended hexagonal structure of graphene, pendant functional groups and nanoplatelet stacking can diminish electrical conductivity.…”

Section: Consideration Of the Sub-optimal Lig Electric Conductivity I...mentioning

confidence: 99%

Elucidating Charge Transfer Processes and Enhancing Electrochemical Performance of Laser-Induced Graphene via Surface Engineering with Sustainable Hydrogel Membranes: An Electrochemist's Perspective

Khodadadiyazdi,

Manohar,

Olejnik

et al. 2024

Preprint

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Laser-induced graphene (LIG) has emerged as a promising solvent-free strategy for producing highly porous, 3D graphene structures, particularly for electrochemical applications. However, the unique character of LIG and hydrogel membrane (HM) coated LIG requires accounting for the specific conditions of its charge transfer process. This study investigates electron transfer kinetics and the electroactive surface area of LIG electrodes, finding efficient kinetics for the [Fe(CN)6]3-/4- redox process, with a high rate constant of 4.12 x 10-3 cm/s and an electroactive area 28 times higher than the geometric area. The impact of polysaccharide HM coatings (cationic chitosan, neutral agarose and anionic sodium alginate) on LIG's charge transfer behavior is elucidated, considering factors like Ohmic drop across porous LIG and Coulombic interactions/permeability affecting diffusion coefficients, estimated from amperometry. Experimental findings are supported by ab-initio calculations showing a electrostatic potential map’s negative charge distribution upon chitosan chain protonation, having an effect in over a two-fold redox current increase upon switching the pH from 7.48 to 1.73. This feature is absent for other studied HMs. It was also revealed that the chitosan's band gap was reduced to 3.07 eV upon acetylation, due to the introduction of a new LUMO state. This study summarizes the operating conditions enhanced by HM presence, impacting redox process kinetics and presenting unique challenges for prospective LIG/HM systems’ electrochemical applications.

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Section: Consideration Of the Sub-optimal Lig Electric Conductivity I...mentioning

confidence: 99%

Elucidating Charge Transfer Processes and Enhancing Electrochemical Performance of Laser-Induced Graphene via Surface Engineering with Sustainable Hydrogel Membranes: An Electrochemist's Perspective

Khodadadiyazdi,

Manohar,

Olejnik

et al. 2024

Preprint

View full text Add to dashboard Cite

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Inducing half-metallicity with enhanced stability in zigzag graphene nanoribbons via fluorine passivation

Jaiswal

Tyagi

Kumar

et al. 2017

Applied Surface Science

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Magneto-electronic properties and carrier mobility in phagraphene nanoribbons: A theoretical prediction

Yuan

Fan

Zhang

2017

Carbon

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Electronic and magnetic properties of zigzag-edged hexagonal graphene ring nanojunctions

Cited by 10 publications

References 46 publications

Elucidating Charge Transfer Processes and Enhancing Electrochemical Performance of Laser-Induced Graphene via Surface Engineering with Sustainable Hydrogel Membranes: An Electrochemist's Perspective

Elucidating Charge Transfer Processes and Enhancing Electrochemical Performance of Laser-Induced Graphene via Surface Engineering with Sustainable Hydrogel Membranes: An Electrochemist's Perspective

Inducing half-metallicity with enhanced stability in zigzag graphene nanoribbons via fluorine passivation

Magneto-electronic properties and carrier mobility in phagraphene nanoribbons: A theoretical prediction

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