References of "Advanced Materials"
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See detailChemical Strain Engineering of Magnetism in Oxide Thin Films
Copie, Olivier; Varignon, Julien ULg; Rotella, Hélène et al

in Advanced Materials (2017)

Transition metal oxides having a perovskite structure form a wide and technologically important class of compounds. In these systems, ferroelectric, ferromagnetic, ferroelastic, or even orbital and charge ... [more ▼]

Transition metal oxides having a perovskite structure form a wide and technologically important class of compounds. In these systems, ferroelectric, ferromagnetic, ferroelastic, or even orbital and charge orderings can develop and eventually coexist. These orderings can be tuned by external electric, magnetic, or stress field, and the cross-couplings between them enable important multifunctional properties, such as piezoelectricity, magneto-electricity, or magneto-elasticity. Recently, it has been proposed that additional to typical fields, the chemical potential that controls the concentration of ion vacancies in these systems may reveal an efficient alternative parameter to further tune their properties and achieve new functionalities. In this study, concretizing this proposal, the authors show that the control of the content of oxygen vacancies in perovskite thin films can indeed be used to tune their magnetic properties. Growing PrVO3 thin films epitaxially on an SrTiO3 substrate, the authors reveal a concrete pathway to achieve this effect. The authors demonstrate that monitoring the concentration of oxygen vacancies through the oxygen partial pressure or the growth temperature can produce a substantial macroscopic tensile strain of a few percent. In turn, this strain affects the exchange interactions, producing a nontrivial evolution of Néel temperature in a range of 30 K. [less ▲]

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See detailPlasmon-Enhanced Sub-Wavelength Laser Ablation: Plasmonic Nanojets
Valev, V.K.; Denkova, D.; Zheng, X. et al

in Advanced Materials (2012), 24

Plasmonic hotspots are regions on the surface of metal nanostructures where light causes very strong oscillation of the electrons. Because electron oscillations constitute an electric current and because ... [more ▼]

Plasmonic hotspots are regions on the surface of metal nanostructures where light causes very strong oscillation of the electrons. Because electron oscillations constitute an electric current and because electric currents heat up the material the same way an electric stove heats up in the kitchen, the plasmonic hotspots are extremely hot. So hot that they can melt the gold in a spot much smaller than the wavelength of light. We were successfully able to demonstrate that this tiny little pool of molten gold can give rise to the smallest nanojets ever observed. [less ▲]

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See detailDistributing the Optical Near-Field for Efficient Field-Enhancements in Nanostructures
Valev, V; De Clercq, B; Biris, C et al

in Advanced Materials (2012), 24

Circularly polarized light imparts a sense of rotation on the electron density in ring-shaped gold nanostructures. As a consequence, the near-field enhancement becomes homogeneous on the surface of the ... [more ▼]

Circularly polarized light imparts a sense of rotation on the electron density in ring-shaped gold nanostructures. As a consequence, the near-field enhancement becomes homogeneous on the surface of the nanostructures, thereby increasing the opportunity for interaction with molecules. This type of nanostructured samples can find a broad range of applications in chemical processes where the interaction between molecules and local field enhancements play an important role. [less ▲]

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See detailTailoring the properties of artificially layered ferroelectric superlattices
Dawber, Matthew; Stucki, Nicolas; Lichtensteiger, Celine et al

in Advanced Materials (2007), 49(23), 4153-4159

The polarization of PbTiO3/SrTiO3 superlattices is experimentally tuned from 0-60 mu C/cm(-2) and the transition temperature from room temperature to 1000 K while maintaining a perfect crystal structure ... [more ▼]

The polarization of PbTiO3/SrTiO3 superlattices is experimentally tuned from 0-60 mu C/cm(-2) and the transition temperature from room temperature to 1000 K while maintaining a perfect crystal structure and low leakage currents (see figure). A simple model based on Landau theory is developed as a guide for the straightforward production of samples with ferroelectric properties designed for particular applications. [less ▲]

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See detailNanoporous Thin Films from Self-Assembled Metallo-supramolecular Block Copolymers
Fustin, Charles-André; Lohmeijer, Bas G.G.; Duwez, Anne-Sophie ULg et al

in Advanced Materials (2005), 17

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See detailSurface modification of multiwalled carbon nanotubes by poly(2-vinylpyridine): Dispersion, selective deposition, and decoration of the nanotubes
Lou, Xudong; Detrembleur, Christophe ULg; Pagnoulle, Christophe et al

in Advanced Materials (2004), 16(23-24), 2123-2127

Polymer modification of carbon nanotubes is accomplished using a grafting-to approach. Radicals formed by the thermolysis of poly(2-vinylpyridine) terminated with a radical-stabilizing nitroxide can react ... [more ▼]

Polymer modification of carbon nanotubes is accomplished using a grafting-to approach. Radicals formed by the thermolysis of poly(2-vinylpyridine) terminated with a radical-stabilizing nitroxide can react with the surface of nanotubes, resulting in grafting densities up to 12 wt.-%. The modified nanotubes, which are easily dispersed in water, can immobilize metal nanoclusters on their surfaces. [less ▲]

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See detailCharge transfer complex inimer: A facile route to dendritic materials
Wang, Wenxin; Yan, Deyue; Bratton, Daniel et al

in Advanced Materials (2003), 15(16), 1348-1352

A versatile approach to the preparation of hyperbranched polymers, in which an inimer is used to assemble a charge transfer complex (CTC) with conventional vinyl monomers, is reported. A novel ... [more ▼]

A versatile approach to the preparation of hyperbranched polymers, in which an inimer is used to assemble a charge transfer complex (CTC) with conventional vinyl monomers, is reported. A novel hyperbranched fluoro-polymer (see Figure) has been successfully synthesized through the copolymerization of chlorotrifluoroethylene (CTFE) and p-(chloromethyl)styrene (CMS) by atom transfer radical polymerization (ATRP). [less ▲]

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See detailOn the electrochemical polymerization of acrylonitrile and N-vinylpyrrolidone : new insight into the mechanism
Jérôme, Robert ULg; Mertens, Marc; Martinot, Lucien

in Advanced Materials (1995), 7(9), 807-809

The protection of metals against environmental attack can be achieved by coating the metal with a protective organic film. Poor adhesion of the organic film to the metal surface has, however, limited the ... [more ▼]

The protection of metals against environmental attack can be achieved by coating the metal with a protective organic film. Poor adhesion of the organic film to the metal surface has, however, limited the success of this approach. Here it is demonstrated that polyacrylonitride can be elecrografted onto a nickel surface producing a strongly adherent film. The transformation of the organic film could also open the way to new polymer-metal composites. [less ▲]

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