A5066659058- Force Microscopy Techniques and Applications
- Quantum optics and atomic interactions
- Mechanical and Optical Resonators
- Near-Field Optical Microscopy
- Laser-Matter Interactions and Applications
- Adhesion, Friction, and Surface Interactions
- Nanofabrication and Lithography Techniques
- Quantum Information and Cryptography
- Laser Material Processing Techniques
- Gas Sensing Nanomaterials and Sensors
- Graphene research and applications
- Nonlinear Dynamics and Pattern Formation
- Physics of Superconductivity and Magnetism
- Metal and Thin Film Mechanics
- Corrosion Behavior and Inhibition
- Electrochemical Analysis and Applications
- Quantum chaos and dynamical systems
- Laser Design and Applications
- Molecular Junctions and Nanostructures
- Nanopore and Nanochannel Transport Studies
- Ocular and Laser Science Research
- Semiconductor materials and devices
- Integrated Circuits and Semiconductor Failure Analysis
- Mechanical Behavior of Composites
- Superconducting Materials and Applications
Federal Institute For Materials Research and Testing
1998-2024
Universität Hamburg
2024
University Medical Center Hamburg-Eppendorf
2024
Helmholtz-Zentrum Berlin für Materialien und Energie
2022-2023
Fritz Haber Institute of the Max Planck Society
2022-2023
National Physical Laboratory
2007-2018
University of Brighton
2016
University of Sheffield
2016
Vacuumschmelze (Germany)
2001-2007
University of Stuttgart
1980-1992
Laser-induced periodic surface structures (LIPSS; ripples) with different spatial characteristics have been observed after irradiation of single-crystalline indium phosphide (c-InP) multiple linearly polarized femtosecond pulses (130fs, 800nm) in air. With an increasing number per spot, N, up to 100, a characteristic evolution two types ripples has observed, i.e., (i) the growth grating perpendicular polarization vector consisting nearly wavelength-sized lines and (ii), specific pulse regime...
This article addresses the much debated question whether degree of hydrophobicity single-layer graphene (1LG) is different from one double-layer (2LG). Knowledge water affinity and its spatial variations critically important as it can affect properties well performance devices exposed to humidity. By employing chemical force microscopy (CFM) with a probe rendered hydrophobic by functionalization octadecyltrichlorosilane (OTS), adhesion between epitaxial on SiC has been measured in deionized...
Rational innovation of electrocatalysts requires detailed knowledge spatial property variations across the solid-electrolyte interface. We introduce correlative atomic force microscopy (AFM) to simultaneously probe,
Dye-laser oscillators and amplifiers are studied theoretically with inclusion of amplified spontaneous emission (ASE). Assuming pencil-like geometry in both cases, laser signal intensity ASE described appropriate photon-transport equations. In particular, there exist different boundary conditions fox fluxes the cavity case due to feedback behavior an optical resonator for modes modes. The interaction output is discussed detail, including optimization without effects. For single- double-pass...
The sensitivity to water vapour of one‐, two‐, and three‐layer epitaxial graphene (1, 2, 3LG) is examined in this study. It unambiguously shown that graphene's response water, as measured by changes work function carrier density, dependent on its thickness, with 1LG being the most sensitive adsorption environmental concentration changes. This furthermore substantiated surface adhesion measurements, which bring evidence less hydrophobic than 2LG. Yet, surprisingly, it found other contaminants...
Titania nanostructures are of increasing interest for a variety applications, including photovoltaics, water splitting, and chemical sensing. Because the photocatalytical properties TiO₂, processes that occur at its surface can be exploited highly efficient nanodevices. A facile fast synthesis route has been explored is free catalysts or templates. An environmental scanning electron microscopy (ESEM) system was employed to grow titania nanowires (NWs) in vapor atmosphere (∼1 mbar) monitor...
"A stochastic framework for the modelling of interurban migration is presented. The model an extension a recently developed master-equation approach to interregional migration. population dynamics French urban system, described by set 78 cities, investigated within period 1954-82. importance synergy effects (self-reinforcing collective effects) as well socioeconomic macrovariables understanding becomes obvious. A forecasting dynamics...[up year 2002 confirms] this result and [gives] further...
Abstract In an effort to expand the understanding of mechanical properties polymeric interphase on a metal surface, composite consisting epoxy and copper was prepared analyzed. Scanning force microscopy‐based modulation microscopy (SFM‐FMM) employed along with dynamic analysis (DMA) energy dispersive X‐ray (EDX). Diglycidyl ether bisphenol A (DGEBA)‐based resins were applied amine curing agents. The samples made taking advantage electron beam lithography (EBL) in order produce sharp edges...
This article presents results and guidelines on the quantitative analysis of size, shape, stiffness single sessile oil droplets in air water. Atomic force microscopy (AFM) facilitates micro- nanoscale which are growing importance for agrochemicals, cosmetics, or foodstuffs containing emulsions with compartments droplets. Measurement droplet shape provides information contact angle support surface as well interfacial tension liquid-liquid interface. In this study, were imaged both amplitude...
Laser ablation of single-crystalline indium phosphide (InP) was performed in air by means linearly polarized Ti : sapphire femtosecond pulses (800 nm, 130 fs, 10 Hz). As a result the irradiation with variable number laser per spot (N /spl les/ 5), several morphological changes (crater formation, rim ripple structures, and cones) were observed. These effects explored using force modulation microscopy (FMM), technique based on scanning microscopy, allowing simultaneous imaging both topography...
A detailed study of the mechanical interphase (IP) between an amine-cured epoxy and amorphous thermoplastic polyvinylpyrrolidone (PVP) was performed. The amine curing agent diaminodiphenylsulphone (DDS). With 170 °C, temperature close to glass transition PVP. Using a depth-sensing indentation setup equipped with Berkovich indenter, force penetration curves were measured at different positions on cross-section epoxy/PVP/epoxy sandwich specimen. Profiles sample Young's modulus, Es, hardness,...
Abstract Accurate knowledge of the nanoroughness surfaces is crucial for many applications related to optics, electronics or tribology. Although atomic force microscopy (AFM) can image with a nanometre spatial resolution, finite size standard tips means that pores, pits grooves dimensions similar smaller than tip apex will not be accurately imaged. Furthermore, are made silicon nitride and prone wear. Mitigation may arise from availability AFM carbon nanotube (CNT) at their foremost end....
Patterned organic light-emitting-diode substrates were treated by oxygen (O2) and tetrafluoromethane (CF4) radio-frequency (rf, 13.56 MHz) plasmas of low-power (close to 1 W) that capacitively-coupled. An unexpected wettability contrast (water contact angle difference up 90°) between the indium-tin-oxide anode bank resist regions was achieved, providing excellent conditioning prior ink-jet printing. This selectivity found be adjustable varying relative exposure time O2 CF4 sequential...