Dumitru Dumcenco

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Publications associées (21)

Field-induced charge separation dynamics in monolayer MoS2

Andras Kis, Dumitru Dumcenco, Dmitry Ovchinnikov, Yen-Cheng Kung, Daniele Vella, Dragan Mihailovic

The absorption spectra of 2D semiconductors are dominated by excitons with binding energy of several hundreds of meV. Nevertheless, even single layers show an appreciable photovoltaic effect and work as the active material in high sensitivity photodetector ...

Iop Publishing Ltd2017

Evolution of the Valley Position in Bulk Transition-Metal Chalcogenides and Their Monolayer Limit

Dumitru Dumcenco, Yi Zhang, Bo Zhou, Zahid Hussain, Gang Xu, Kai Yan

Layered transition metal chalcogenides with large spin orbit coupling have recently sparked much interest due to their potential applications for electronic, optoelectronic, spintronics, and valleytronics. However, most current understanding of the electro ...

American Chemical Society2016

Free-standing electronic character of monolayer

Andras Kis, Dumitru Dumcenco, Olivier Renault, Yen-Cheng Kung, Ming-Wei Chen, Hokwon Kim

We have evaluated as-grown MoS2 crystals, epitaxially grown on a monocrystalline sapphire by chemical vapor deposition (CVD), with direct electronic band-structure measurements by energy-filtered k-space photoelectron emission microscopy performed with a c ...

Amer Physical Soc2016

Disorder engineering and conductivity dome in ReS2 with electrolyte gating

Andras Kis, Oleg Yazyev, Dumitru Dumcenco, Dmitry Ovchinnikov, Fernando Gargiulo, Adrien Victor Allain, Diego José Pasquier

Atomically thin rhenium disulphide (ReS2) is a member of the transition metal dichalcogenide family of materials. This two-dimensional semiconductor is characterized by weak interlayer coupling and a distorted 1T structure, which leads to anisotropy in ele ...

Nature Publishing Group2016

Single-layer MoS2 nanopores as nanopower generators

Aleksandra Radenovic, Andras Kis, Dumitru Dumcenco, Michael Graf, Ke Liu, Dmitry Ovchinnikov, Jiandong Feng

Making use of the osmotic pressure difference between fresh water and seawater is an attractive, renewable and clean way to generate power and is known as 'blue energy'(1-3). Another electrokinetic phenomenon, called the streaming potential, occurs when an ...

Nature Publishing Group2016

High-quality Synthetic 2D Transition Metal Dichalcogenide Semiconductors

Andras Kis, Dumitru Dumcenco, Dmitry Ovchinnikov, Kolyo Marinov

We give here an overview on our results on the large-area growth of 2D transition metal dichalcogenide semiconductors MoS2, MoSe2, WSe2 using chemical vapor deposition. The growth of MoS2 on sapphire occurs epitaxially with the crystalline orientation of t ...

Ieee2016

Electrochemical Reaction in Single Layer MoS2: nanopores opened atom by atom

Aleksandra Radenovic, Andras Kis, Duncan Thomas Lindsay Alexander, Martina Lihter, Michael Graf, Dumitru Dumcenco, Ke Liu, Jiandong Feng, Roman Bulushev, Daria Krasnozhon

Ultrathin nanopore membranes based on 2D materials have demonstrated ultimate resolution toward DNA sequencing. Among them, molybdenum disulfide (MoS2) shows long-term stability as well as superior sensitivity enabling high throughput performance. The trad ...

American Chemical Society (ACS)2015

Large-Area Epitaxial Monolayer MoS2

Nicola Marzari, Anna Fontcuberta i Morral, Aleksandra Radenovic, Philippe Gillet, Andras Kis, Dumitru Dumcenco, Marco Gibertini, Yen-Cheng Kung, Oriol López Sánchez, Daria Krasnozhon

Two-dimensional semiconductors such as MoS2 are an emerging material family with wide-ranging potential applications in electronics, optoelectronics, and energy harvesting. Large-area growth methods are needed to open the way to applications. Control over ...

Amer Chemical Soc2015

Identification of single nucleotides in MoS2 nanopores

Aleksandra Radenovic, Andras Kis, Dumitru Dumcenco, Ke Liu, Jiandong Feng, Roman Bulushev, Sergey Khlybov

The size of the sensing region in solid-state nanopores is determined by the size of the pore and the thickness of the pore membrane, so ultrathin membranes such as graphene and single-layer molybdenum disulphide could potentially offer the necessary spati ...

Nature Publishing Group2015

Large-area MoS2 grown using H2S as the sulphur source

Aleksandra Radenovic, Philippe Gillet, Andras Kis, Duncan Thomas Lindsay Alexander, Dumitru Dumcenco, Dmitry Ovchinnikov, Oriol López Sánchez

We report on the growth of molybdenum disulphide (MoS2) using H2S as a gas-phase sulfur precursor that allows controlling the domain growth direction of domains in both vertical (perpendicular to the substrate plane) and horizontal (within the substrate pl ...

2015

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