Concept

Polyfluorure de vinylidène

Publications associées (166)

Tuning and switching hypersonic phononic properties of impedance contrast nanocomposites

Anodic aluminium oxide (AAO) containing arrays of aligned cylindrical nanopores infil-trated with polymers is a well defined model system for the study of hypersound propagation in polymer nanocomposites. Hypersonic phononic properties of AAO/polymer nanoc ...

American Chemical Society2010

What Can Be Expected From Lead-Free Piezoelectric Materials?

Dragan Damjanovic, Li Jin, Naama Klein, Viktor Porokhonskyy

The reasons for the lower piezoelectric properties in the most studied lead-free piezoelectrics, modified (K,Na)NbO3 and (Bi0.5Na0.5)TiO3, are discussed. Contributions from domain wall motion and properties at the morphotropic phase boundary are considered ...

2010

Surface Assembly of Catechol-Functionalized Poly(l-lysine)-graft-poly(ethylene glycol) Copolymer on Titanium Exploiting Combined Electrostatically Driven Self-Organization and Biomimetic Strong Adhesion

Cyril Portmann, Karl Gademann

Nonfouling coatings, based on surface-tethered, hydrophilic polymer chains, have widespread application in areas such as biosensing, medical devices, and biotechnology. Self-organization of polymers is a particularly attractive approach given its simplicit ...

2010

Ferroelectric Polymer Gates for Persistent Field Effect Control of Ferromagnetism in (Ga,Mn)As Layers

Sebastian Riester

The growing demand for higher computing power and element density continuously drives the development of novel device concepts. One group of materials currently attracting a lot of interest are the magnetoelectric multiferroics, due to their potential for ...

EPFL2010

Structural complexity of (Na0.5Bi0.5)TiO3-BaTiO3 as revealed by Raman spectroscopy

Nava Setter, Dragan Damjanovic, Naama Klein

The structural phase diagram of the Pb-free ferroelectric (Na1/2Bi1/2)1−xBaxTiO3, x

2010

CdEr2Se4: A New Erbium Spin Ice System in a Spinel Structure

Ivica Zivkovic

we present a detailed study of the spinel CdEr2Se4 and show it to be a new instance of spin ice, the first one in an erbium material and the first one in a spinel. Definitive experimental evidence comes from the temperature dependence of the magnetic entro ...

American Physical Society2010

High-Strain Lead-free Antiferroelectric Electrostrictors

Dragan Damjanovic

Research on lead-free piezoceramics has dramatically increased over the last years due to stringent legislation demanding to phase out current lead- containing piezoceramics. The use of electrostrictive materials for electric-field induced strain has been ...

2009

Toward a low-voltage multiferroic transistor: Magnetic (Ga,Mn)As under ferroelectric control

Nava Setter, Igor Stolichnov, Harry Joseph Trodahl, Sebastian Riester

The persistent field effect control of ferromagnetism in a diluted magnetic semiconductor by low-voltage polarizing pulses is demonstrated in a ferroelectric gate field effect transistor configuration. The Curie temperature of the (Ga,Mn)As channel is unam ...

2009

Comments on origins of enhanced piezoelectric properties in ferroelectrics

Dragan Damjanovic

This review discusses recent advances in understanding origins of large piezoelectric properties in some ferroelectric materials. In particular, it addresses the role of polarization rotation and monoclinic phases. It is suggested that the polarization rot ...

2009

Polymer wiring of insulating electrode materials: An approach to improve energy density of lithium-ion batteries

Michael Graetzel, Qian Wang, Shaik Mohammed Zakeeruddin, Péter Kalman Péchy

The poor electronic conductivity of LiFePO4 has been one of the major issues impeding it from achieving high power and energy density lithium-ion batteries. In this communication, a novel polymer-wiring concept was proposed to improve the conduction of the ...

2009

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