Recherche

Afficher tous les résultats pour

Accueil

Personne

Georg Fantner

À propos
Confidentialité
Mentions légales

Graph Chatbot

Publications associées (86)

Page 4 sur 5

A monolithic MEMS position sensor for closed-loop high-speed atomic force microscopy

Georg Fantner, Jonathan David Adams, Nahid Hosseini, Adrian Pascal Nievergelt

The accuracy and repeatability of atomic force microscopy (AFM) imaging significantly depend on the accuracy of the piezoactuator. However, nonlinear properties of piezoactuators can distort the image, necessitating sensor-based closed-loop actuators to ac ...

2016

Harnessing the damping properties of materials for high-speed atomic force microscopy

Jürgen Brugger, Jonas Grossenbacher, Georg Fantner, Blake William Erickson, Jonathan David Adams, Adrian Pascal Nievergelt

The success of high-speed atomic force microscopy in imaging molecular motors1, enzymes2 and microbes3 in liquid environments suggests that the technique could be of significant value in a variety of areas of nanotechnology. However, the majority of atomic ...

Nature Publishing Group2016

Indirect identification and compensation of lateral scanner resonances in atomic force microscopes

Georg Fantner

Improving the imaging speed of atomic force microscopy (AFM) requires accurate nanopositioning at high speeds. However, high speed operation excites resonances in the AFM's mechanical scanner that can distort the image, and therefore typical users of comme ...

2011

A high-bandwidth voltage amplifier for driving piezoelectric actuators in high-speed atomic force microscopy

Santiago Harald Andany, Georg Fantner, Adrian Pascal Nievergelt, Mustafa Kangül

High-speed atomic force microscopy (HS-AFM) is a technique capable of revealing the dynamics of biomolecules and living organisms at the nanoscale with a remarkable temporal resolution. The phase delay in the feedback loop dictates the achievable speed of ...

AIP Publishing2023

Top-Down Fabrication of Silicon Nanowires in Ultra-deep Trenches

Yusuf Leblebici, Oliver Peric, Davide Sacchetto, Zuhal Tasdemir, Georg Fantner

One-Dimensional (1D) nanostructures have gained a considerable attention in the field of semiconductor technology for the past several decades. With the help of rapid development in the process technology, it becomes possible to scale these nanostructures ...

2014

Direct-write nanoscale printing of nanogranular tunnelling strain sensors for sub-micrometre cantilevers

Georg Fantner, Jonathan David Adams, Maja Dukic Pjanic

The sensitivity and detection speed of cantilever-based mechanical sensors increases drastically through size reduction. The need for such increased performance for high-speed nanocharacterization and bio-sensing, drives their sub-micrometre miniaturizatio ...

Nature Research2016

Method and apparatus of using a scanning probe microscope

Georg Fantner, Jonathan David Adams, Adrian Pascal Nievergelt

a scanning probe microscope for high-speed imaging and/or nanomechanical mapping. The microscope comprises a scanning probe comprising a cantilever with a tip at the distal end; and means for modulating a tip-sample distance separating the tip from an inte ...

2016

Antimicrobial peptides selectively target malaria parasites by a cholesterol-dependent mechanism

Georg Fantner, Navid Asmari Saadabad, Marcos Penedo Garcia

Hundreds of thousands die annually from malaria caused by Plasmodium falciparum (Pf), with the emergence of drug-resistant parasites hindering eradication efforts. Antimicrobial peptides (AMPs) are known for their ability to disrupt pathogen membranes with ...

2025

Multilayer mems cantilevers

Georg Fantner, Jonathan David Adams, Nahid Hosseini

The present invention relates to a cantilever or membrane comprising a body and an elongated beam attached to the body. The elongated beam includes a first layer comprising a first material, a second layer comprising a second material having an elastic mod ...

2016

Comparison of Different Precision Pseudo Resistor Realizations in the DC-Feedback of Capacitive Transimpedance Amplifiers

Jens Anders, Georg Fantner

In this paper, three different pseudo resistor (PR) realizations are compared regarding their noise and linearity performance within the DC feedback loop of an integrator-differentiator transimpedance amplifier (I-D-TIA). Thanks to its intrinsic shot noise ...

IEEE2019

Deterministic grayscale nanotopography to engineer mobilities in strained MoS2 FETs

Giovanni Boero, Andras Kis, Jürgen Brugger, Georg Fantner, Nicola Marzari, Norma Rivano, Zhenyu Wang, Xia Liu, Ana Conde Rubio, Berke Erbas, Mitali Banerjee, Jin Jiang, Marcos Penedo Garcia

Field-effect transistors (FETs) based on two-dimensional materials (2DMs) with atomically thin channels have emerged as a promising platform for beyond-silicon electronics. However, low carrier mobility in 2DM transistors driven by phonon scattering remain ...

Nature Research2024

High-speed imaging upgrade for a standard sample scanning atomic force microscope using small cantilevers

Georg Fantner, Blake William Erickson, Jonathan David Adams, Maja Dukic Pjanic, Adrian Pascal Nievergelt

We present an atomic force microscope (AFM) head for optical beam deflection on small cantilevers. Our AFM head is designed to be small in size, easily integrated into a commercial AFM system, and has a modular architecture facilitating exchange of the opt ...

2014

An integrator-differentiator TIA using a multi-element pseudo-resistor in its DC servo loop for enhanced noise performance

Jens Anders, Georg Fantner

In this paper, we present an integrator-differentiator transimpedance amplifier (TIA) featuring a multielement pseudo-resistor (MEPR) in the DC feedback path for improved noise performance in the presence of non-zero DC input currents. The presented protot ...

IEEE2018

Open-source microscope add-on for structured illumination microscopy

Matthias Lütolf, Theo Lasser, Aleksandra Radenovic, John McKinney, Georg Fantner, Olivier François Venzin, Mélanie Thérèse Marie Hannebelle, Tomas Lukes, Samuel Mendes Leitão, Antonius Chrisnandy, Chiara Toniolo, Andrew Charles Oates, Esther Braun, Prabhu Prasad Swain, Nathan Cyprien Arsène Ronceray

Super-resolution techniques expand the abilities of researchers who have the knowledge and resources to either build or purchase a system. This excludes the part of the research community without these capabilities. Here we introduce the openSIM add-on to ...

Nature Portfolio2024

Mechanical morphotype switching as an adaptive response in mycobacteria

John McKinney, Georg Fantner, Chiara Toniolo

Invading microbes face a myriad of cidal mechanisms of phagocytes that inflict physical damage to microbial structures. How intracellular bacterial pathogens adapt to these stresses is not fully understood. Here, we report the discovery of a virulence mech ...

Amer Assoc Advancement Science2024

High-Speed Atomic Force Microscopy Imaging of DNA Three-Point-Star Motif Self Assembly Using Photothermal Off-Resonance Tapping

Santiago Harald Andany, Georg Fantner, Bahareh Ghadiani, Mustafa Kangül, Maartje Martina Cornelia Bastings, Cem Tekin, Veronika Cencen, Marcos Penedo Garcia

High-speed atomic force microscopy (HS-AFM) is a popular molecular imaging technique for visualizing single-molecule biological processes in real-time due to its ability to image under physiological conditions in liquid environments. The photothermal off-r ...

Journal Of Visualized Experiments2024

Components for high-speed atomic force microscopy optimized for low phase-lag

Santiago Harald Andany, Georg Fantner, Jonathan David Adams, Adrian Pascal Nievergelt, Mélanie Thérèse Marie Hannebelle

IEEE2017

Air and Water-Stable n-Type Doping and Encapsulation of Flexible MoS2 Devices with SU8

Andras Kis, Georg Fantner, Nahid Hosseini, Dumitru Dumcenco, Yen-Cheng Kung

2018

Instruments of change for academic tool development comment

Georg Fantner, Andrew Charles Oates

Scientific progress has always been driven by the ability to build an instrument to answer a specific question. But spreading the news of how to replicate that tool is an evolving art, ripe for an open-source revolution. ...

NATURE RESEARCH2021

A biphasic growth model for cell pole elongation in mycobacteria

Joëlle Xiao Yuan Ven, John McKinney, Gaëlle Madeleine Vuaridel, Georg Fantner, Mélanie Thérèse Marie Hannebelle, Haig Alexander Eskandarian, Chiara Toniolo

Mycobacteria grow by inserting new cell wall material in discrete zones at the cell poles. This pattern implies that polar growth zones must be assembled de novo at each division, but the mechanisms that control the initiation of new pole growth are unknow ...

Nature Research2020