Hydrophobization of silver nanoparticles through surface-initiated atom transfer radical polymerization

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Electronic Structure-Dependent Surface Plasmon Resonance in Single Au-Fe Nanoalloys

Olivier Martin, Duncan Thomas Lindsay Alexander, Jérémy Butet, Gabriel David Bernasconi

The relationship between composition and plasmonic properties in noble metal nanoalloys is still largely unexplored. Yet, nanoalloys of noble metals, such as gold, with transition elements, such as iron, have unique properties and a number of potential app ...

2019

Nitrogen-doped graphene stabilized copper nanoparticles for Huisgen [3+2] cycloaddition "click" chemistry

Véronique Michaud, Yves Leterrier

Nitrogen-doped reduced graphene oxide (NRGO) stabilized copper nanoparticles are designed to assist Cu(I)-catalyzed Huisgen [3+2] cycloaddition "click" chemistry (CuAAC). This study demonstrates a robust route for the synthesis of vastly dispersed heteroge ...

Royal Society of Chemistry2019

Controlling topology, dynamics and function of polymer brushes via post-polymerization modification

Piotr Mocny

Polymer brushes are a class of thin coatings, where each of chains is tethered to the underlying substrate via one chain end. Densely grafted polymer brushes feature a stretched chain conformation, which in a unique way enhances their lubrication and non-b ...

EPFL2019

Synthesis of Loop Poly(Methyl Methacrylate) Brushes via Chain-End Postpolymerization Modification

Harm-Anton Klok, Piotr Mocny

Polymer brushes are typically densely grafted assemblies of polymer chains that are tethered via one end group to a solid substrate. Anchoring linear polymer chains via both end groups to a surface results in loop-type polymer brushes. Although loop polyme ...

American Chemical Society2019

Low-dimensional perovskite nanoplatelet synthesis using in situ photophysical monitoring to establish controlled growth

Nicola Sebastiano Barchi

Perovskite nanoparticles have attracted the attention of research groups around the world for their impressive photophysical properties, facile synthesis and versatile surface chemistry. Here, we report a synthetic route that takes advantage of a suite of ...

2019

Water: its influence on the formation and crystallization of amorphous calcium carbonate

Huachuan Du

Nature produces CaCO3-based materials that display fascinating mechanical properties. These properties are a result of the exquisite control over the formation of CaCO3 crystals that nature possesses. Such a high level of control is likely achieved, at lea ...

EPFL2019

Direct observation of photo-mechanical stiffness in alkanethiol-capped gold nanoparticles supracrystals by ultrafast small-angle electron diffraction

Francesco Stellacci, Fabrizio Carbone, Giulia Fulvia Mancini, Tatiana Latychevskaia, Javier Reguera Gomez, Francesco Pennacchio

We demonstrate that ultrastiff bonding between nanoparticles can be engineered by ad hoc assemblies of ligands, reaching strengths comparable to that of strong covalent bonds. Our observation relies on femtosecond small-angle electron diffraction. ...

E D P SCIENCES2019

Structural and microstructural studies on SiC-SiO2 ceramic composites

Ho-Yun Lee

In this study, SiC ceramic substrates were prepared with 99.5% silicon carbide powders which were came from waste silicon mud during the manufacturing process of solar cells. It is found that a SiO2 layer with 50 nm in thickness is present on the SiC surfa ...

2019

Probing Alloy Formation Using Different Excitonic Species: The Particular Case of InGaN

Nicolas Grandjean, Raphaël Butté, Gordon Jens Callsen

Since the early 1960s, alloys are commonly grouped into two classes that feature either bound states in the band gap (I) or additional, nondiscrete band states (II). Consequently, one can observe either excitons bound to isoelectronic impurities or the typ ...

American Physical Society2019

Functionalization of iron oxide nanoparticles with methacrylate-based monomers for preparation of nanocomposites

Heinrich Hofmann

Nanocomposites with a high and uniform loading of magnetic nanoparticles are very desirable for various applications. In this study, a simple and scalable route for preparing nanocomposites with a high and uniform loading of magnetic nanoparticles is prese ...

AMER INST PHYSICS2018

Controlled deposition of titanium oxide overcoats by non-hydrolytic sol gel for improved catalyst selectivity and stability

Jeremy Luterbacher, Florent Emmanuel Héroguel, Yuan-Peng Du

Advances in the synthetic control of surface nanostructures could improve the activity, selectivity and stability of heterogeneous catalysts. Here, we present a technique for the controlled deposition of TiO2 overcoats based on non-hydrolytic sol-gel chemi ...

Elsevier2018

Micro-mechanics of 3D architectured metals synthesized by electrodeposition

Maxime Alain Baptiste Mieszala

Cellular metallic materials have emerged as a new promising class of materials due to their lightweight porous structures and advanced multi-functional properties. Originally limited to random metallic foams, modern lithography techniques have enabled the ...

EPFL2018