Effect of tunneling on the electrical conductivity of nanowire-based films: Computer simulation within a core–shell model

Vodolazskaya, Irina V.; Eserkepov, Andrei V.; Akhunzhanov, Renat K.; Tarasevich, Yuri Yu.

doi:10.1063/1.5135605

Cited by 15 publications

(8 citation statements)

References 46 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…[48,49] Note, that the resistance of each flake is neglected, since the tunneling resistance dominates (Section S2, Supporting Information). A hard-core/soft-shell model is adopted to define the range where flakes are considered adjacent: [48,50] the hard-core is defined by the physical dimensions of the flakes and the softshell extends 2 nm beyond the hard-core. Any two flakes with overlapping shells are considered to be adjacent and thus form a junction for current flow.…”

Section: Monte Carlo Modeling Of Charge Transport In 2d Networkmentioning

confidence: 99%

Inter‐Flake Quantum Transport of Electrons and Holes in Inkjet‐Printed Graphene Devices

Wang

Gosling

Trindade

et al. 2020

Adv Funct Materials

View full text Add to dashboard Cite

2D materials have unique structural and electronic properties with potential for transformative device applications. However, such devices are usually bespoke structures made by sequential deposition of exfoliated 2D layers. There is a need for scalable manufacturing techniques capable of producing high‐quality large‐area devices comprising multiple 2D materials. Additive manufacturing with inks containing 2D material flakes is a promising solution. Inkjet‐printed devices incorporating 2D materials have been demonstrated, however there is a need for greater understanding of quantum transport phenomena as well as their structural properties. Experimental and theoretical studies of inkjet‐printed graphene structures are presented. Detailed electrical and structural characterization is reported and explained by comparison with transport modeling that include inter‐flake quantum tunneling transport and percolation dynamics. The results reveal that the electrical properties are strongly influenced by the flakes packing fraction and by complex meandering electron trajectories, which traverse several printed layers. Controlling these trajectories is essential for printing high‐quality devices that exploit the properties of 2D materials. Inkjet‐printed graphene is used to make a field effect transistor and Ohmic contacts on an InSe phototransistor. This is the first time that inkjet‐printed graphene has successfully replaced single layer graphene as a contact material for 2D metal chalcogenides.

show abstract

Section: Monte Carlo Modeling Of Charge Transport In 2d Networkmentioning

confidence: 99%

Inter‐Flake Quantum Transport of Electrons and Holes in Inkjet‐Printed Graphene Devices

Wang

Gosling

Trindade

et al. 2020

Adv Funct Materials

View full text Add to dashboard Cite

show abstract

“…The α 0 was calculated as 1.77 × 10 −3 for the [AgNPs/PU] 23.8% composites, which was smaller than that of the bulk silver (4.13 × 10 −3 ). [40] It is believed that the interparticle energy barriers at the nonideal interfaces necessitate the hopping or tunneling processes [41,42] for charge transfer, thereby resulting in the reduction of α 0 in the composites. The electromechanical properties of the AgNP/PU films at strains ranging from 0% to 100% are shown in Figure 3a.…”

Section: Resultsmentioning

confidence: 99%

High‐Resolution Printable and Elastomeric Conductors from Strain‐Adaptive Assemblies of Metallic Nanoparticles with Low Aspect Ratios

Kang

Wang

Zhao

et al. 2020

Small

View full text Add to dashboard Cite

Stretchable conductors capable of precise micropatterning are imperative for applications in various wearable technologies. Metallic nanoparticles with low aspect ratios and miniscule sizes are preferred over metallic nanowires or nanoflakes for such applications. However, nanoparticles tend to lose mutual contact during stretching. Therefore, they are rarely used alone in stretchable conductors. In this study, electronic inks comprising silver nanoparticles (AgNPs) for the high‐resolution printing of stretchable conductors are reported. AgNPs are synthesized using aqueous polyurethane micelles, which are subsequently disentangled into polymeric chains in isopropanol to stabilize the inks. The ink rheology can be arbitrarily tuned to allow direct‐write printing with a minimum feature width of 3 µm. Owing to the absence of extra surfactants, direct drying of such inks at room temperature provides the stretchable conductors with an initial conductivity of 8846 S cm−1 and conductivity of 1305 S cm−1 at 100% strain. This enhanced performance is attributed to the conductive percolations through assemblies of AgNPs adapting to the strain and is equivalent to those of stretchable conductors filled with Ag nanowires or flakes. These inks are promising for the scalable fabrication of highly integrated stretchable electronics.

show abstract

“…54). A synopsis of the experimental data [59] evidences that the typical aspect ratio for Ag nanowires ranges from 100 to 1000. For all the above listed shapes of such large aspect ratio, the percolation threshold coincides with n × c to within few percents.…”

Section: Introductionmentioning

confidence: 98%

Random nanowire networks: Identification of a current-carrying subset of wires using a modified wall follower algorithm

Tarasevich,

Eserkepov,

Akhunzhanov

et al. 2021

Preprint

Self Cite

View full text Add to dashboard Cite

We mimic nanorod-based transparent electrodes as random resistor networks produced by the homogeneous, isotropic, and random deposition of conductive zero-width sticks onto an insulating substrate. The number density (the number of objects per unit area of the surface) of these sticks is supposed to exceed the percolation threshold, i.e., the system under consideration is a conductor. To identify any current-carrying part (the backbone) of the percolation cluster, we have proposed and implemented a modification of the well-known wall follower algorithm -one type of maze solving algorithm. The advantage of the modified algorithm is its identification of the whole backbone without visiting all the edges. The algorithm has been applied to backbone identification in networks with different number densities of conducting sticks. We have found that (i) for number densities of sticks above the percolation threshold, the strength of the percolation cluster quickly approaches unity as the number density of the sticks increases; (ii) simultaneously, the percolation cluster becomes identical to its backbone plus simplest dead ends, i.e., edges that are incident to vertices of degree 1. This behavior is consistent with the presented analytical evaluations.

show abstract

Effect of tunneling on the electrical conductivity of nanowire-based films: Computer simulation within a core–shell model

Cited by 15 publications

References 46 publications

Inter‐Flake Quantum Transport of Electrons and Holes in Inkjet‐Printed Graphene Devices

Inter‐Flake Quantum Transport of Electrons and Holes in Inkjet‐Printed Graphene Devices

High‐Resolution Printable and Elastomeric Conductors from Strain‐Adaptive Assemblies of Metallic Nanoparticles with Low Aspect Ratios

Random nanowire networks: Identification of a current-carrying subset of wires using a modified wall follower algorithm

Contact Info

Product

Resources

About