Publications by Michael Graf | EPFL Graph Search

Related publications (14)

2D nanopores: fabrication, energy harvesting and field-effect sensing

Solid-state nanopores are man-made, nano-sized openings in membranes separating two chambers containing an electrolyte solution. When applying an electric field across the membrane, the nanopore provides the only path for mobile ions to pass from one side ...

EPFL2019

Nanoscale Selective Passivation of Electrodes Contacting a 2D Semiconductor

Aleksandra Radenovic, Martina Lihter, Michael Graf

2D semiconducting materials have become the central component of various nanoelectronic devices and sensors. For sensors operating in liquid, it is crucial to efficiently block the electron transfer that occurs between the electrodes contacting the 2D mate ...

2019

Transverse Detection of DNA Using a MoS2 Nanopore

Aleksandra Radenovic, Martina Lihter, Sanjin Marion, Michael Graf

Classical nanopore sensing relies on the measurement of the ion current passing through a nanopore. Whenever a molecule electrophoretically translocates through the narrow constriction, it modulates the ion current. Although this approach allows one to mea ...

2019

Wafer-Scale Fabrication of Nanopore Devices for Single-Molecule DNA Biosensing using MoS2

Aleksandra Radenovic, Andras Kis, Martina Lihter, Michal Daniel Macha, Michael Graf, Andrey Chernev, Mukesh Kumar Tripathi, Mukeshchand Thakur, Jochem Deen

Atomically thin (2D) nanoporous membranes are an excellent platform for a broad scope of academic research. Their thickness and intrinsic ion selectivity (demonstrated for example in molybdenum disulfide-MoS2) make them particularly attractive for single-m ...

2020

Light-Enhanced Blue Energy Generation Using MoS2 Nanopores

Aleksandra Radenovic, Andras Kis, Martina Lihter, Michael Graf, Dmitrii Unuchek

Blue energy relies on the chemical potential difference between solutions of high and low ionic concentrations, potentially providing an independent energy source at estuaries around the world. The energy conversion relies on reverse electrodialysis via io ...

2019

Fabrication and practical applications of molybdenum disulfide nanopores

Aleksandra Radenovic, Martina Lihter, Ke Liu, Michael Graf, Jiandong Feng, Mukeshchand Thakur

Among the different developed solid-state nanopores, nanopores constructed in a monolayer of molybdenum disulfide (MoS2) stand out as powerful devices for single-molecule analysis or osmotic power generation. Because the ionic current through a nanopore is ...

Nature Publishing Group2019

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

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

Microscopic Detection Analysis of Single Molecules in MoS2 Membrane Nanopores

Aleksandra Radenovic, Michael Graf

A systematic microscopic analysis of the various resistive effects involved in the electronic detection of single biomolecules in a nanopore of a MoS2 nanoribbon is presented. The variations of the transverse electronic current along the two-dimensional (2 ...

2020

Electrical impedance tomography: Amplitudes of cardiac related impedance changes in the lung are highly position dependent

Michael Graf

Background Electrical impedance tomography (EIT) is used on the thorax to measure impedance changes due to the presence of air and blood in the lung. This experimental study was performed to investigate the effect of posture on cardiac and respiratory rela ...

Public Library of Science2017

Electrochemical Functionalization of Selectively Addressed MoS2 Nanoribbons for Sensor Device Fabrication

Aleksandra Radenovic, Vasiliki Tileli, Martina Lihter, Michal Daniel Macha, Tzu-Hsien Shen, Michael Graf, Yanfei Zhao, Miao Zhang

Tailoring the surface properties of 2D materials, such as transition metal dichalcogenides (TMDCs), at the nanoscale is becoming essential in the fabrication of various 2D material-based nanoelectronic devices. Due to the chemical inertness of their basal ...

AMER CHEMICAL SOC2021

Orthogonal Tip-to-Tip Nanocapillary Alignment Allows for Easy Detection of Fluorescent Emitters in Femtomolar Concentrations

Aleksandra Radenovic, Michael Graf

Here we present the realization of a novel fluorescence detection method based on the electromigration of fluorescent molecules within a nanocapillary combined with the laser excitation through a platinum (Pt)-coated nanocapillary. By using the Pt nanocapi ...

American Chemical Society (ACS)2018

Single-layer MoS2 nanopores as nanopower generators

Aleksandra Radenovic, Andras Kis, Ke Liu, Dumitru Dumcenco, Michael Graf, 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

Fast and automatic processing of multi-level events in nanopore translocation experiments

Aleksandra Radenovic, Michael Graf, Lorenz Jan Steinbock, Camille Alice Raillon

We have developed a method to analyze in detail, translocation events providing a novel and flexible tool for data analysis of nanopore experiments. Our program, called OpenNanopore, is based on the cumulative sums algorithm (CUSUM algorithm). This algorit ...

Royal Society of Chemistry2012

A Ran-Dependent Importin-Beta/Nup153 Barrier in the Nuclear Pore Complex

Michael Graf

Cell Press2014