Computational characterization and control of electrical conductivity of nanowire composite network under mechanical deformation

Hwang, Jiann Loung; Sohn, Hiesang; Lee, Sang Hyun

doi:10.1038/s41598-018-34992-6

Cited by 14 publications

(6 citation statements)

References 48 publications

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“…In fact, a 1/s-dependency of the resistance with increasing distance is characteristic for 3D transport in a homogeneous material [51]. For an isotropic 2D system, the increase of the resistance with increasing distance s along the 1D collinear 4 point probe assembly is exactly compensated by lateral spread of the electrons, thus the resistance is not dependent on s. In our case, the doped 6H-SiC(0001) substrate is electrically insulating at these temperatures [50,52], thus the 1/s-dependence must be related to the structure of our intercalated 2D phase and were found for nanowire network structures as well [53,54]. Apparently, by increasing the tip distance, the number of percolated electron paths is overcompensating the 1D contribution.…”

Section: In-situ Surface Transport Measurementssupporting

confidence: 53%

Surface Transport Properties of Pb-Intercalated Graphene

et al. 2021

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Intercalation experiments on epitaxial graphene are attracting a lot of attention at present as a tool to further boost the electronic properties of 2D graphene. In this work, we studied the intercalation of Pb using buffer layers on 6H-SiC(0001) by means of electron diffraction, scanning tunneling microscopy, photoelectron spectroscopy and in situ surface transport. Large-area intercalation of a few Pb monolayers succeeded via surface defects. The intercalated Pb forms a characteristic striped phase and leads to formation of almost charge neutral graphene in proximity to a Pb layer. The Pb intercalated layer consists of 2 ML and shows a strong structural corrugation. The epitaxial heterostructure provides an extremely high conductivity of σ=100 mS/□. However, at low temperatures (70 K), we found a metal-insulator transition that we assign to the formation of minigaps in epitaxial graphene, possibly induced by a static distortion of graphene following the corrugation of the interface layer.

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Section: In-situ Surface Transport Measurementssupporting

confidence: 53%

Surface Transport Properties of Pb-Intercalated Graphene

et al. 2021

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“…Specifically, a NW network with a confined geometry and higher density less able to accommodate an applied bending strain by stretching. That is, denser Ag NW networks exhibit an increased resistance compared to those of lower-density networks [49,50,51,52,63,66].…”

Section: Mechano-electric Properties Of Ag Nw Networkmentioning

confidence: 99%

“…Comparative cyclic bending test results as a function of time or cycle number for ( a ) Ag NW networks and Ag NW–RGO hybrid after exposure at 70 °C for 132 h. Reproduced with permission from [66]. Copyright 2016 Royal Society of Chemistry.…”

Section: Figures Scheme and Tablementioning

confidence: 99%

Silver Nanowire Networks: Mechano-Electric Properties and Applications

Sohn

Park

et al. 2019

Materials

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With increasing technological demand for portable electronic and photovoltaic devices, it has become critical to ensure the electrical and mechano-electric reliability of electrodes in such devices. However, the limited flexibility and high processing costs of traditional electrodes based on indium tin oxide undermine their application in flexible devices. Among various alternative materials for flexible electrodes, such as metallic/carbon nanowires or meshes, silver nanowire (Ag NW) networks are regarded as promising candidates owing to their excellent electrical, optical, and mechano-electric properties. In this context, there have been tremendous studies on the physico-chemical and mechano-electric properties of Ag NW networks. At the same time, it has been a crucial job to maximize the device performance (or their mechano-electric performance) by reconciliation of various properties. This review discusses the properties and device applications of Ag NW networks under dynamic motion by focusing on notable findings and cases in the recent literature. Initially, we introduce the fabrication (deposition process) of Ag NW network-based electrodes from solution-based coating processes (drop casting, spray coating, spin coating, etc.) to commercial processes (slot-die and roll-to-roll coating). We also discuss the electrical/optical properties of Ag NW networks, which are governed by percolation, and their electrical contacts. Second, the mechano-electric properties of Ag NW networks are reviewed by describing individual and combined properties of NW networks with dynamic motion under cyclic loading. The improved mechano-electric properties of Ag NW network-based flexible electrodes are also discussed by presenting various approaches, including post-treatment and hybridization. Third, various Ag NW-based flexible devices (electronic and optoelectronic devices) are introduced by discussing their operation principles, performance, and challenges. Finally, we offer remarks on the challenges facing the current studies and discuss the direction of research in this field, as well as forthcoming issues to be overcome to achieve integration into commercial devices.

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“…Monte Carlo (MC) simulation is another kind of effective method to study GRPCs nanocomposites. Hwang et al [149] used MC simulation to develop a quantitative model predicting the electrical performance of graphene-reinforced one-dimensional composite under bending (as shown in Figure 25). Gbaguidi et al [150] developed a 2D MC percolation network model for studying the electromechanical behaviors of carbon nanotube (CTN)-and GNP-reinforced hybrid nanocomposites.…”

Section: Theoretical Modelingmentioning

confidence: 99%

Electromechanical Behaviors of Graphene Reinforced Polymer Composites: A Review

et al. 2020

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Graphene (including its derivatives)-reinforced polymer composites (GRPCs) have been drawing tremendous attention from academic and industrial communities for developing smart materials and structures. Such interest stems from the excellent combination of the mechanical and electrical properties of these composites while keeping the beneficial intrinsic attributes of the polymers, including flexibility, easy processability, low cost and good biological and chemical compatibility. The electromechanical performances of these GRPCs are of great importance for the design and optimization of engineering structures and components. Extensive work has been devoted to this topic. This paper reviews the recent studies on the electromechanical behaviors of GRPCs. First the methods and techniques to manufacture graphene and GRPCs are introduced, in which the pros and cons of each method are discussed. Then the experimental examination and theoretical modeling on the electromechanical behaviors of the nanocomposites are presented and discussed.

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Computational characterization and control of electrical conductivity of nanowire composite network under mechanical deformation

Cited by 14 publications

References 48 publications

Surface Transport Properties of Pb-Intercalated Graphene

Surface Transport Properties of Pb-Intercalated Graphene

Silver Nanowire Networks: Mechano-Electric Properties and Applications

Electromechanical Behaviors of Graphene Reinforced Polymer Composites: A Review

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