Concept

Surface charge

Publications associées (322)

A thermodynamic solution model for calcium carbonate: Towards an understanding of multi-equilibria precipitation pathways

Paul Bowen, Jacques Lemaître, Marcel Donnet

Thermodynamic solubility calculations are normally only related to thermodynamic equilibria in solution. In this paper, we extend the use of such solubility calculations to help elucidate possible precipitation reaction pathways during the entire reaction. ...

Elsevier2009

Direct Observation of Transitions between Surface-Dominated and Bulk Diffusion Regimes in Nanochannels

Philippe Renaud, Theo Lasser, Arnaud Bertsch, Nicolas Durand, Claudio Dellagiacoma, Raphaël Goetschmann

The diffusion of charged proteins in liquid-filled nanometer-sized apertures with charged surfaces has been investigated with fluorescence correlation spectroscopy (FCS). Based on a two-dimensional (2D) multicomponent diffusion model, key parameters such a ...

2009

Array electrode design for transcutaneous electrical stimulation: A simulation study

Silvestro Micera

Array electrodes are a promising technology that is likely to bring transcutaneous electrical stimulation (TES) a step forward. The dynamic adaptation of electrode size and position helps to simplify the use of electrical stimulation systems and to increas ...

2009

Long-Range Electron Transfer across Cytochrome-Hematite (alpha-Fe2O3) Interfaces

Kevin M. Rosso, Nicholas Wigginton

Electrochemical scanning tunneling microscopy was used to assess the distance dependence of electron transfer facilitated by a bacterial multiheme cytochrome to a single crystal iron oxide surface. We measured tunneling current-distance (I-s) profiles acro ...

2009

Diffusion of Single Molecules in Nanochannels

Philippe Renaud, Theo Lasser, Arnaud Bertsch, Nicolas Durand, Claudio Dellagiacoma, Raphaël Goetschmann

Fluorescence correlation spectroscopy allows investigating the interaction of charged proteins with charged surfaces of liquid-filled nanochan- nels. Based on a 2-D multi-component diffusion model the bulk and surface diffusion behavior is quantified. ...

2009

X-ray-Induced Changes in Wettability

Giorgio Margaritondo

We observed that hard X-ray irradiation modifies the wettability of a variety of inorganic materials. The smooth surfaces of all tested inorganic materials (ZnO, p-Si, Al2O3, SrTiO3, TiN, ZnS, CuO, Ag2O, and Cr2O3) change during it-radiation to a state of ...

2009

Synthesis and characterization of novel polyelectrolytes based on double-charged cationic monomers

Ricardo Losada Mateo

Bis-1,3(N,N,N-trimethylammonium)-2-propylmethacrylate dichloride (di-M) and bis-1,3(N,N,N-trimethylammonium)-2-propylacrylate dichloride (di-A), two new double-charged monomers, were the subject of the research reported in this thesis. These monomers provi ...

EPFL2009

Analysis and study of novel terpolymers composed of acrylamide, mono-charged and double-charged cationic monomers

Peter Käuper, Jutta Christine Wandrey, Ricardo Losada Mateo

The composition of novel terpolymers containing acrylamide (A), acryloyloxyethyltrimethylammonium chloride (Q), and bis-1,3(N,N,N-trimethylammonium)-2-propylmethacrylate dichloride (M) was analyzed combining FTIR and potentiometric titration. Calibration w ...

2009

Copolymerization of a cationic double-charged monomer and electrochemical properties of the copolymers

Jutta Christine Wandrey, Ricardo Losada Mateo

The free radical copolymerization of 1,3-bis(N,N,N-trimethylammonium)-2-propylmethacrylate dichloride (di-M) with acryloyloxyethyltrimethylammonium chloride (Q), diallyldimethylammonium chloride (DADMAC), and acrylamide (A) yielded novel polyelectrolytes a ...

2009

Controlling the charge environment of single quantum dots in a photonic-crystal cavity

Laurent Balet, Blandine Alloing, Carl Zinoni

We demonstrate that the presence of charges around a semiconductor quantum dot (QD) strongly affects its optical properties and produces nonresonant coupling to the modes of a microcavity. We show that, besides (multi)exciton lines, a QD generates a spectr ...

2009

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