Topics

Percolation Effects in Electrolytically-Gated WS/Graphene Nano:Nano Composites.

07:00 EST 30th January 2019 | BioPortfolio

Summary of "Percolation Effects in Electrolytically-Gated WS/Graphene Nano:Nano Composites."

Mixed networks of conducting and non-conducting nanoparticles show promise in a range of applications where fast charge transport is important. While the dependence of network conductivity on the conductive mass fraction (M) is well understood, little is known about the M-dependence of mobility and carrier density. This is particularly important as the addition of graphene might lead to increases in the mobility of semiconducting nanosheet-network transistors. Here, we use electrolytic gating to investigate the transport properties of spray-coated composite networks of graphene and WS nanosheets. As the graphene M is increased, we find both conductivity and carrier density to increase in line with percolation theory with percolation thresholds (~8 vol%) and exponents (~2.5) consistent with previous reporting. Perhaps surprisingly, we find the mobility increases modestly from ~0.1 cm/Vs (for a WS network) to ~0.3 cm/Vs (for a graphene network) which we attribute to the similarity between WS-WS and graphene-graphene junction resistances. In addition, we find both the transistor on- and off-currents to scale with M according to percolation theory, changing sharply at the percolation threshold. Through fitting, we show that only the current in the WS network changes significantly upon gating. As a result, the on-off ratio falls sharply at the percolation threshold from ~10 to ~2 at higher M. Reflecting on these results, we conclude that the addition of graphene to a semiconducting network is not a viable strategy to improve transistor performance as it reduces the on:off ratio far more than it improves the mobility.

Affiliation

Journal Details

This article was published in the following journal.

Name: ACS applied materials & interfaces
ISSN: 1944-8252
Pages:

Links

DeepDyve research library

PubMed Articles [14622 Associated PubMed Articles listed on BioPortfolio]

Ultra-High Performance of Nano-Engineered Graphene-Based Natural Jute Fiber Composites.

Natural fibers composites are considered as sustainable alternative to synthetic composites due to their environmental and economic benefits. However, they suffer from poor mechanical and interfacial ...

Synergistic Effect of Aligned Graphene Nanosheets in Graphene Foam for High-Performance Thermally Conductive Composites.

Graphene shows a great potential for high-performance thermally conductive composite applications because of its extremely high thermal conductivity. However, the graphene-based polymer composites rep...

Laser-Induced Graphene Composites as Multifunctional Surfaces.

Laser-induced graphene (LIG) is a platform material for numerous applications. Despite its ease in synthesis, LIG's potential for use in some applications is limited by its robustness on substrate. He...

Removal of Cr(VI) with Nano-FeS and CMC-FeS and Transport Properties in Porous Media.

We investigated the effect of CMC dosage on dispersibility and sedimentation of FeS,and the effects of initial Cr(VI) concentrations,reaction temperatures and initial pH values on the Cr(VI) removal b...

Microplastics and nanoplastics: would they affect global biodiversity change?

Micro(nano)plastics, new emerging contaminants, are ubiquitously found in the environment due to continuous release and accumulation. Widespread micro(nano)plastics can increase their exposure to orga...

Clinical Trials [1260 Associated Clinical Trials listed on BioPortfolio]

PK of Efavirenz & Lopinavir Nano-formulations in Healthy Volunteers

This study is an open-label, prospective pharmacokinetic study investigating two antiretroviral agents in parallel and employing an adaptive design with two stages, whereby the results obt...

Clinical Efficacy in Relieving Dentin Hypersensitivity of Nanohydroxyapatite-Containing Toothpastes and Cream

This study will investigate the effectiveness of nanohydroxyapatite (nano-HAP)-containing toothpastes and cream to relieve dentin hypersensitivity, comparing it with those of a commercial ...

Nano-Pulse Stimulation (NPS) in Seborrheic Keratosis Study

The primary purpose of this trial is to evaluate Nano-Pulse Stimulation (NPS) to clear or remove Seborrheic Keratosis (SK) lesions from off-facial areas of healthy adult subjects.

Nano-Pulse Stimulation (NPS) in Sebaceous Hyperplasia

This prospective, open label, muti-center study evaluates the use of Nano-Pulse Stimulation (NPS) in the treatment of Sebaceous Hyperplasia (SH) lesions less than 2.5mm in size.

Effect of Nano-hydroxyapatite and LASER on Dentin Hypersensitivity

The aim of this study was to evaluate the effect of nanohydroxyapatite associated with low potency laser therapy in eliminating or reducing dentin hypersensitivity in a randomized placebo-...

Medical and Biotech [MESH] Definitions

An integrated nano-scale approach to MEDICINE which involves concurrent diagnosis, drug delivery, therapy, and monitoring of therapeutic response.

A voltage-gated sodium channel beta subunit subtype that non-covalently associates with voltage-gated alpha subunits. Defects in the SCN3B gene which codes for this beta subunit are associated with Brugada syndrome 7.

A voltage-gated sodium channel beta subunit subtype that covalently associates with voltage-gated alpha subunits. Defects in the SCN4B gene, which codes for this beta subunit, are associated with long QT syndrome-10.

A voltage-gated sodium channel beta subunit abundantly expressed in SKELETAL MUSCLE; HEART; and BRAIN. It non-covalently associates with voltage-gated alpha subunits. Defects in the SCN1B gene, which codes for this beta subunit, are associated with generalized epilepsy with febrile seizures plus, type 1, and Brugada syndrome 5.

A voltage-gated sodium channel beta subunit that binds covalently to voltage-gated alpha subunits.

Quick Search


DeepDyve research library

Searches Linking to this Article