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Related publications (24)

Synergistic Dual Engineering of NiO x via Ethylenediamine Chelation and γ‐Ray Irradiation for Enhanced Interfacial Transport in Perovskite Solar Cells

This study highlights an interface‐engineering strategy aimed at simultaneously stabilizing nickel oxide (NiO x ) sol–gel solutions and overcoming the intrinsic defects and charge transport limitations of NiO x . NiO x has been widely established as an efficient and stable hole transport layer in inverted perovskite solar cells, but sol–gel‐based NiO x is susceptible to defect formation during thermal annealing, leading to non‐uniform interfacial contact and limited charge extraction efficiency. To address

Wiley2026

Many-Worlds Inverse Rendering

Discontinuous visibility changes remain a major bottleneck when optimizing surfaces within a physically based inverse renderer. Many previous works have proposed sophisticated algorithms and data structures to sample visibility silhouettes more efficiently. Our work presents another solution: instead of evolving a surface locally, we extend differentiation to hypothetical surface patches anywhere in 3D space. We refer to this as a “many-worlds” representation because it models a superposition of independent

Association for Computing Machinery (ACM)2025

Field-effect transistor element and quantum computer device

Jean-Michel Sallese

A quantum dot device (100) for use as a qubit in a quantum computer is disclosed, comprising a channel region (106), a source region (108), a drain region (110), and at least two primary gate regions (120, 122, 124), wherein the at least two primary gate regions (120, 122, 124) are respectively provided with a main direction of extension (126, 128, 130) and disposed on a first surface of the channel region (106), and wherein the respective main directions of extension of the at least two primary gate region

2025

Fractal surfaces in adhesive wear processes

Wear of materials plays a key role in the durability of manifactured objects and it has thus an economical importance in our society. In spite of the efforts, a unified picture of the underlying physics of the phenomenon is still far from being reached, because of the numerous mechanisms and processes that constitute the complexity of wear. Moving one step closer to the understanding of the physics of wear would mean enhancing our understanding of all the related fields that it affects, like friction and co

2018

Injectable, self-opening, and freestanding retinal prosthesis for fighting blindness made of conjugated polymers

Fighting blindness with retinal prostheses requires challenges not yet achieved: implanting a prosthesis (i) large enough to cover the retinal surface and (ii) embedding a high number of highly dense stimulatory elements. We developed an injectable, self-opening, and freestanding prosthesis restoring at least 40° of visual field, therefore covering at least a retinal surface of 12 mm in diameter. Moreover, the prosthesis has a hemispherical shape in order to minimize the distance from the targeted cells ove

2017

Injectable, Self-opening, and Freestanding Retinal Prosthesis for Fighting Blindness

Purpose:In the past decade, retinal prostheses emerged as promising technology to restore a primitive, although clinically useful, form of vision. However, fighting blindness with retinal prostheses require challenges not yet achieved. From a clinical perspective, sight restoration requires to reach two main goals: enlarging the visual field of the patient and improving its visual acuity. From the engineering point of view, these needs demand the overcoming of two major issues: implanting a prosthesis (i) l

2017

Solar photovoltaic module

Christophe Ballif, Franz-Josef Haug, Philipp Friedrich Hermann Löper, Philippe Wyss, Josua Andreas Stückelberger

In the present invention a new solar photovoltaic module is proposed comprising a solar cell comprising a silicon layer having a first (1 a) surface and a second surface (1a) opposite to said first surface. The solar cell further comprises a passivating la ...

2017

Surface origin and control of resonance Raman scattering and surface band gap in indium nitride

Esther Alarcón Lladó

Resonance Raman scattering measurements were performed on indium nitride thin films under conditions where the surface electron concentration was controlled by an electrolyte gate. As the surface condition is tuned from electron depletion to accumulation, ...

Iop Publishing Ltd2016

Light Generation and Harvesting in a van der Waals Heterostructure

Andras Kis

Two-dimensional (2D) materials are a new type of materials under intense study because of their interesting physical properties and wide range of potential applications from nanoelectronics to sensing and photonics. Monolayers of semiconducting transition metal dichalcogenides MoS2 or WSe2 have been proposed as promising channel materials for field-effect transistors. Their high mechanical flexibility, stability, and quality coupled with potentially inexpensive production methods offer potential advantages

Amer Chemical Soc2014

Tailoring the Magnetism of Co Atoms on Graphene through Substrate Hybridization

Harald Brune, François Patthey, Stefano Rusponi

We determine the magnetic properties of individual Co atoms adsorbed on graphene (G) with x-ray absorption spectroscopy and magnetic circular dichroism. The magnetic ground state of Co adatoms strongly depends on the choice of the metal substrate on which graphene is grown. Cobalt atoms on G/Ru(0001) feature exceptionally large orbital and spin moments, as well as an out-of-plane easy axis with large magnetic anisotropy. Conversely, the magnetic moments are strongly reduced for Co/G/Ir(111), and the magneti

Amer Physical Soc2014

Sawtooth control in ITER using ion cyclotron resonance heating

Olivier Sauter, Jonathan Graves, Martin Jucker

Numerical modelling of the effects of ion cyclotron resonance heating (ICRH) on the stability of the internal kink mode suggests that ICRH should be considered as an essential sawtooth control tool in ITER. Sawtooth control using ICRH is achieved by direct ...

2011

Density functional theory study of Ir atom deposited on gamma-Al2O3 (001) surface

Iridium adsorption on gamma-Al2O3 (001) surface has been studied using the ab initio calculation method and the electronic structures of the bare and the Ir adsorbed gamma-Al2O3 (001) surfaces have been analyzed. By modeling different adsorption sites, one ...

2009

Core-level photoelectron spectroscopy probing local strain at silicon surfaces and interfaces

Alfredo Pasquarello

Using a first-principles approach, we investigate the origin of the fine structure in Si 2p photoelectron spectra at the Si(100)2x1 surface and at the Si(100)-SiO2 interface. Calculated and measured shifts show very good agreement for both systems. By using maximally localized Wannier functions, we provide an interpretation in which the effects due to the electronegativity of second nearest neighbor atoms and due to the local strain field are distinguished. Hence, in combination with accurate modeling, phot

American Institute of Physics2007

Pattern recovery by dry etching of gap-induced blurring in nanostencil lithography

Nanostencil lithography is a flexible, rapid and resistless patterning method based on a high-resolution shadow mask. It allows for a wide choice of materials and surfaces to be structured and on the contrary to deep-ultraviolet (DUV), x-ray, electron beam, or ion beam exposure, mechanically fragile and chemically functionalized surfaces can be structured by this technique. One of the major limitations in nanostencil lithography is gap-induced pattern blurring. With the aim of integrating nanomechanical str

2005

Shape and deformation measurements of large objects by fringe projection

The height and/or deformation of a surface of an object (10) defined in terms of x, y and z coordinates is measured by projecting a divergent beam of light 21) onto the surface to produce a periodic pattern of fringes (30. A CCD camera (40) views the surface from another angle and images the reflected light. Phase information is extracted from at least one image to produce an optical print (36) of the object containing phase information and image-coordinates information both being related to camera pixel po

2004

Seasonal vegetation changes in mountain pastures due to simulated effects of cattle grazing

Alexandre Buttler

Cattle influence grassland dynamics in three ways: herbage removal, dung deposition and trampling. The objective of this study was to assess the effects of these factors, separately or in combination, and to compare them with cattle grazing over a one year period in a field experiment conducted in the Jura Mountains of northwestern Switzerland. A set of controlled treatments simulating the three factors was applied in a fenced area: (1) repeated mowing - three levels; (2) intensive trampling - two levels; (

2004

High light field confinement for Fluorescence Correlation Spectroscopy using a Solid Immersion Lens

Theo Lasser

In this paper we present recent single molecule detection experiment using a solid immersion lens (SIL) for fluorescent correlation spectroscopy measurements. We compared the performance of the SIL in combination with an air objective (40×, numerical aperture (NA)=0.6) with a water immersion objective (40×, NA=1.15) in a confocal microscope system (ConfoCorr 1). Important parameters for single molecule experiments such as collection efficiency and excitation field confinement were investigated. Although the

Elsevier2004

Strain and stress distributions in flexible pavements under moving loads

André-Gilles Dumont

Calculated strain distributions in flexible pavement were studied by comparison with measurements made on full-scale structures. The calculated results were obtained by elastic and viscoelastic modellings of these structures. As no stress measurements were collected, the stress distribution was studied by comparing the results of elastic and viscoelastic calculations. For different loading and temperature conditions, and assuming the hypothesis of the French design method for flexible pavement, modellings p

2004

Surface modification of PVC endotracheal tubes by oxygen glow discharge to reduce bacterial adhesion

Hauke Harms

A d.c. oxygen glow discharge was used to modify medical-grade poly(vinyl chloride) (PVC) to study how surface chemistry and hydrophilicity influence Pseudomonas aeruginosa adhesion. The effects of plasma exposure time on the resulting surface, including chemical composition, wettability and roughness, were assessed using x-ray photoelectron spectroscopy, contact angle measurements and atomic force microscopy analysis. A significant alteration in the hydrophilicity of the native PVC surface was observed afte

Wiley-Blackwell2003

Moulding process

Jan-Anders Edvin Maansson

A moulding process, in particular a bladder inflation moulding process for the production of a composite material based part, said composite material comprising a polymer matrix and reinforcing fibres, wherein at least a portion of external surface of said part is shaped by a corresponding interior surface of a mould. The interior surface of said mould is provided with a polishing. Chromium plating or nickel plating improves smoothness and glossy appearance. The best wave and relief appearance is obtained i

2003

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Related publications (24)

Synergistic Dual Engineering of NiO x via Ethylenediamine Chelation and γ‐Ray Irradiation for Enhanced Interfacial Transport in Perovskite Solar Cells

Wiley2026