Advertisement
Advertise here Publish your press releases here Sponsor BioPortfolio
Follow us on Twitter Sign up for daily news and research emails Contributors wanted

Oxygen environmental and passivation effects on molybdenum disulfide field effect transistors.

02:45 EDT 17th April 2014 | BioPortfolio

Summary of "Oxygen environmental and passivation effects on molybdenum disulfide field effect transistors."

We investigated the effects of passivation on the electrical characteristics of molybdenum disulfide (MoS(2)) field effect transistors (FETs) under nitrogen, vacuum, and oxygen environments. When the MoS(2) FETs were exposed to oxygen, the on-current decreased and the threshold voltage shifted in the positive gate bias direction as a result of electrons being trapped by the adsorbed oxygen at the MoS(2) surface. In contrast, the electrical properties of the MoS(2) FETs changed only slightly in the different environments when a passivation layer was created using polymethyl methacrylate (PMMA). Specifically, the carrier concentration of unpassivated devices was reduced to 6.5 × 10(15) cm(-2) in oxygen from 16.3 × 10(15) cm(-2) in nitrogen environment. However, in PMMA-passivated devices, the carrier concentration remained nearly unchanged in the range of 1-3 × 10(15) cm(-2) regardless of the environment. Our study suggests that surface passivation is important for MoS(2)-based electronic devices.

Affiliation

Department of Physics and Astronomy, Seoul National University, Gwanak-ro, Gwanak-gu, Seoul 151-747, Korea.

Journal Details

This article was published in the following journal.

Name: Nanotechnology
ISSN: 1361-6528
Pages: 095202

Links

PubMed Articles [22839 Associated PubMed Articles listed on BioPortfolio]

High Performance Molybdenum Disulfide Field Effect Transistors with Spin Tunnel Contacts.

Molybdenum disulfide has recently emerged as a promising two-dimensional semiconducting material for nanoelectronic, optoelectronic, and spintronic applications. Here, we investigate the field effect...

Switching Mechanism in Single-Layer Molybdenum Disulfide Transistors: an Insight into Current Flow across Schottky Barriers.

In this article, we study the metal contact properties on single-layer molybdenum disulfide (MoS2) crystals, and hence reveal the nature of switching mechanism in MoS2 transistors. On investigating tr...

Effect of low-frequency electromagnetic field exposure on oocyte differentiation and follicular development.

The effect of electromagnetic field (EMF) as an environmental factor on different organs including female reproductive system is of critical concern. The aim of the present study is to evaluate the ef...

Passivated Aluminum nanohole arrays for label-free biosensing applications.

We report the fabrication and performance of a surface plasmon resonance Al nanohole array refractometric biosensor. An Al surface passivation treatment based on oxygen plasma is developed in order to...

Complete Corrosion Inhibition through Graphene Defect Passivation.

Graphene is expected to enable superior corrosion protection due to its impermeability and chemical inertness. Previous reports, however, demonstrate limited corrosion inhibition and even corrosion en...

Clinical Trials [3420 Associated Clinical Trials listed on BioPortfolio]

Study of cPMP (Precusor Z) to Treat Molybdenum Cofactor Deficiency (MoCD) Type A

Molybdenum Cofactor Deficiency Type A (MoCD) is a very rare autosomal recessive disorder that is essentially fatal early in life. Naturally occurring cPMP is present in the body of all hea...

Effect of High Levels of Oxygen and Smoking on the Lungs in Human Volunteers

Patients with lung disease experiencing difficulty breathing can be treated with oxygen therapy. This involves the delivery of "extra" oxygen by a face-mask or through small tubes placed...

Respiratory Effects of Perioperative Oxygen During General Anaesthesia

Aim: To investigate the effect of high intra- and postoperative oxygen concentration (80%, as opposed to normally 30%) on pulmonary gas exchange and other pulmonary complications after abd...

Effect of Oxygen in Normoxaemic COPD Patients Who Desaturate During Exercise

In COPD patients with desaturation during exercise, several studies have shown an acute beneficial effect of supplemental oxygen. Therefore, both the British Thoracic Society and the Ameri...

Pre-flight Titration of Supplemental Oxygen

The purpose of this study is to evaluate if supplemental oxygen during air travel can be reliably titrated using a Hypoxia-altitude simulation test (HAST). Also, the effect of oxygen suppl...

Medical and Biotech [MESH] Definitions

The study of ENVIRONMENTAL POLLUTION and the toxic effects of ENVIRONMENTAL POLLUTANTS on the ECOSYSTEM. The term was coined by Truhaut in 1969.

The effect of environmental or physiological factors on the driver and driving ability. Included are driving fatigue, and the effect of drugs, disease, and physical disabilities on driving.

Elimination of ENVIRONMENTAL POLLUTANTS; PESTICIDES and other waste using living organisms, usually involving intervention of environmental or sanitation engineers.

Removal of ENVIRONMENTAL POLLUTANTS or contaminants for the general protection of the environment. This is accomplished by various chemical, biological, and bulk movement methods, in conjunction with ENVIRONMENTAL MONITORING.

The effects of ionizing and nonionizing radiation upon living organisms, organs and tissues, and their constituents, and upon physiologic processes. It includes the effect of irradiation on drugs and chemicals.

Search BioPortfolio:
Advertisement
Advertisement