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

20:21 EDT 1st September 2015 | 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 [35373 Associated PubMed Articles listed on BioPortfolio]

Air Stable Doping and Intrinsic Mobility Enhancement in Monolayer Molybdenum Disulfide by Amorphous Titanium Suboxide Encapsulation.

To reduce Schottky-barrier-induced contact and access resistance, and the impact of charged impurity scattering on mobility in devices based on 2D transition metal dichalcogenides (TMDs), considerable...

The Mechanical Properties of Molybdenum Disulfide and the Effect of Doping: an In Situ TEM Study.

Direct observations on nanopillars composed of molybdenum disulfide (MoS2) and chromium doped MoS2 and their response to compressive stress have been made. Time-resolved transmission electron microsco...

Effects of molybdenum on the composition and nanoscale morphology of passivated austenitic stainless steel surfaces.

Surface analysis by time-of-flight secondary ion mass spectrometry, X-ray photoelectron spectroscopy and scanning tunnelling microscopy has been applied to provide new insight on Mo effects on the com...

Optoelectrical Molybdenum Disulfide (MoS2)-Ferroelectric Memories.

In this study, we fabricated and tested electronic and memory properties of field-effect transistors (FETs) based on monolayer or few-layer molybdenum disulfide (MoS2) on a lead zirconium titanate (Pb...

Molybdenum Disulfide: Kinetic Nature of Grain Boundary Formation in As-Grown MoS2 Monolayers (Adv. Mater. 27/2015).

Single-crystalline grains and grain boundaries in an as-grown molybdenum disulfide monolayer are visualized by second-harmonic-generation microscopy. Further statistical analysis reveals that the boun...

Clinical Trials [4146 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...

Using Focus Groups to Assess the Impact of Environmental Health Science Programs for K-12 Educational Community

The MIDAS Project (Models of Implementation and Dissemination of Environmental Health and Science Across Subjects) Assessment Objectives: - Determine whether students are aware of the ...

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.


Advertisement
 
Advertisement
 

Searches Linking to this Article