Electrically Tunable and Negative Schottky Barriers in Multi-layered Graphene/MoS2 Heterostructured Transistors

Scientific Reports
Dongri Qiu, Eun Kyu Kim

Abstract

We fabricated multi-layered graphene/MoS2 heterostructured devices by positioning mechanically exfoliated bulk graphite and single-crystalline 2H-MoS2 onto Au metal pads on a SiO2/Si substrate via a contamination-free dry transfer technique. We also studied the electrical transport properties of Au/MoS2 junction devices for systematic comparison. A previous work has demonstrated the existence of a positive Schottky barrier height (SBH) in the metal/MoS2 system. However, analysis of the SBH indicates that the contacts of the multi-layered graphene/MoS2 have tunable negative barriers in the range of 300 to -46 meV as a function of gate voltage. It is hypothesized that this tunable SBH is responsible for the modulation of the work function of the thick graphene in these devices. Despite the large number of graphene layers, it is possible to form ohmic contacts, which will provide new opportunities for the engineering of highly efficient contacts in flexible electronics and photonics.

References

Jul 20, 2005·Proceedings of the National Academy of Sciences of the United States of America·K S NovoselovA K Geim
Sep 2, 2009·Nano Letters·Young-Jun YuPhilip Kim
Feb 1, 2011·Nature Nanotechnology·B RadisavljevicA Kis
May 15, 2012·ACS Nano·Dattatray J LateC N R Rao
Jun 19, 2012·Nature Nanotechnology·Kin Fai MakTony F Heinz
Aug 23, 2012·Nature Communications·Sunkook KimKinam Kim
Nov 8, 2012·Nature Nanotechnology·Qing Hua WangMichael S Strano
Dec 18, 2012·Nano Letters·Saptarshi DasJoerg Appenzeller
Mar 6, 2013·Nature Nanotechnology·Michael S Fuhrer, James Hone
Apr 30, 2013·Nature Nanotechnology·Jae-Young Choi
Jun 25, 2013·Nature Materials·Branimir Radisavljevic, Andras Kis
Jul 28, 2013·Nature·A K Geim, I V Grigorieva
Oct 22, 2013·Nature Nanotechnology·Kallol RoyArindam Ghosh
Mar 26, 2014·ACS Nano·Rudren Ganatra, Qing Zhang
Apr 30, 2014·Beilstein Journal of Nanotechnology·Oliver OchedowskiMarika Schleberger
Nov 6, 2014·Scientific Reports·Weiyi WangFaxian Xiu

❮ Previous
Next ❯

Citations

Jun 11, 2016·Physical Chemistry Chemical Physics : PCCP·Jie SuZhengtang Liu
Sep 27, 2018·Nanoscale·Zegao WangMingdong Dong
Mar 13, 2019·Nanoscale·Krystian NowakowskiPantelis Bampoulis
May 4, 2016·Optics Express·B OrazbayevI Khromova
Nov 16, 2018·Chemical Science·José Ramón Durán RetamalJr-Hau He
Feb 17, 2017·The Journal of Chemical Physics·Shanshan SuRoger K Lake
Jul 14, 2018·Scientific Reports·Dongil ChuEun Kyu Kim
Jul 3, 2021·Nanomaterials·Bruna SilvaAndrea Capasso
Jan 23, 2018·ACS Applied Materials & Interfaces·Young Chul KimYeong Hwan Ahn
Dec 22, 2016·ACS Applied Materials & Interfaces·Arun Kumar SinghJonghwa Eom
Jan 22, 2019·ACS Applied Materials & Interfaces·Seung-Hwan KimHyun-Yong Yu

❮ Previous
Next ❯

Methods Mentioned

BETA
atomic force microscopy
AFM
X-ray
optical microscopy

Related Concepts

Trending Feeds

COVID-19

Coronaviruses encompass a large family of viruses that cause the common cold as well as more serious diseases, such as the ongoing outbreak of coronavirus disease 2019 (COVID-19; formally known as 2019-nCoV). Coronaviruses can spread from animals to humans; symptoms include fever, cough, shortness of breath, and breathing difficulties; in more severe cases, infection can lead to death. This feed covers recent research on COVID-19.

Blastomycosis

Blastomycosis fungal infections spread through inhaling Blastomyces dermatitidis spores. Discover the latest research on blastomycosis fungal infections here.

Nuclear Pore Complex in ALS/FTD

Alterations in nucleocytoplasmic transport, controlled by the nuclear pore complex, may be involved in the pathomechanism underlying multiple neurodegenerative diseases including Amyotrophic Lateral Sclerosis and Frontotemporal Dementia. Here is the latest research on the nuclear pore complex in ALS and FTD.

Applications of Molecular Barcoding

The concept of molecular barcoding is that each original DNA or RNA molecule is attached to a unique sequence barcode. Sequence reads having different barcodes represent different original molecules, while sequence reads having the same barcode are results of PCR duplication from one original molecule. Discover the latest research on molecular barcoding here.

Chronic Fatigue Syndrome

Chronic fatigue syndrome is a disease characterized by unexplained disabling fatigue; the pathology of which is incompletely understood. Discover the latest research on chronic fatigue syndrome here.

Evolution of Pluripotency

Pluripotency refers to the ability of a cell to develop into three primary germ cell layers of the embryo. This feed focuses on the mechanisms that underlie the evolution of pluripotency. Here is the latest research.

Position Effect Variegation

Position Effect Variagation occurs when a gene is inactivated due to its positioning near heterochromatic regions within a chromosome. Discover the latest research on Position Effect Variagation here.

STING Receptor Agonists

Stimulator of IFN genes (STING) are a group of transmembrane proteins that are involved in the induction of type I interferon that is important in the innate immune response. The stimulation of STING has been an active area of research in the treatment of cancer and infectious diseases. Here is the latest research on STING receptor agonists.

Microbicide

Microbicides are products that can be applied to vaginal or rectal mucosal surfaces with the goal of preventing, or at least significantly reducing, the transmission of sexually transmitted infections. Here is the latest research on microbicides.