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Holger Frauenrath

Cette personne a quitté l’EPFL

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Publications associées (53)

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All-polyamide nanofibrillar composites by in situ fibrillation of aramid fibers

John Christopher Plummer, Holger Frauenrath, Pascal Alexander Schouwink, Nicolas Candau, Oguzhan Oguz, Sylvain Cyril Claude Galland

All-polyamide composites containing up to 30 vol% highly dispersed PPTA nanofibrils with diameters in the range 50-500 nm were prepared by melt-compounding polyamide 6,10 (PA610) with chopped poly(p-phenylene terephthalamide) (PPTA) fibers in the temperatu ...

Elsevier Sci Ltd2023

Long‐Lived Photocharges in Supramoelcular Polymers of Low‐Bandgap Chromophores

Andrzej Sienkiewicz, Holger Frauenrath, Daniel Görl, Regina Judith Hafner

Photoinduced charge separation in supramolecular aggregates of π‐conjugated molecules is a fundamental photophysical process, and a key criterion for the development of advanced organic electronics materials. Here, we report on the self‐assembly of novel l ...

2020

Optical gap and fundamental gap of oligoynes and carbyne

Anne-Clémence Corminboeuf, Holger Frauenrath, Jan Cornelius Brauer, Stephen Schrettl, Laurent Alexis Clément Vannay, Eric Albert Georges Bremond

The optoelectronic properties of various carbon allotropes and nanomaterials have been well established, while the purely sp-hybridized carbyne remains synthetically inaccessible. Its properties have therefore frequently been extrapolated from those of def ...

Nature Research2020

Synthesis of polysiloxane elastomers modified with sulfonyl side groups and their electromechanical response

Holger Frauenrath, Yauhen Sheima

Dielectric elastomer transducers are elastic capacitors that respond to mechanical or electrical stress. They can be used in applications such as millimeter-sized soft robots and harvesters of the energy contained in ocean waves. The dielectric component o ...

Royal Society of Chemistry2023

Elements for a Rational Polymer Approach towards Carbon Nanostructures

Holger Frauenrath, Stephen Schrettl

Wiley-VCH Verlag GmbH2012

Spontaneous formation of a self-healing carbon nanoskin at the liquid-liquid interface

Pedro Miguel Nunes Pereira de Almeida Reis, Holger Frauenrath, Nicolas Candau, Reuben Yeo Jueyuan, Paul Grandgeorge, Enzo Jean Raymond Bomal

Biological membranes exhibit the ability to self-repair and dynamically change their shape while remaining impermeable. Yet, these defining features are difficult to reconcile with mechanical robustness. Here, we report on the spontaneous formation of a ca ...

Nature Research2022

Nanostructured Carbonaceous Materials from Molecular Precursors

Holger Frauenrath, Stephen Schrettl, Tobias Hoheisel

Nanostructured carbonaceous materials, that is, carbon materials with a feature size on the nanometer scale and, in some cases, functionalized surfaces, already play an important role in a wide range of emerging fields, such as the search for novel energy ...

Wiley-VCH Verlag GmbH2010

Blatter-type radicals as polarizing agents for electrochemical overhauser dynamic nuclear polarization

Jean-Philippe Ansermet, Holger Frauenrath, Christophe Roussel, Jonas Milani, Mika Antero Tamski, Felipe Andres Saenz Padilla

Overhauser dynamic nuclear polarization (O-DNP) refers to a microwave-assisted process where an unpaired electron's (e.g. a radical) spin polarization is transferred to surrounding nuclei in solution, thus increasing the nuclear magnetic resonance (NMR) si ...

Royal Society of Chemistry2022

Multifunctional Aluminum Pre-treatments from End-Functionalized Phosphonic Acid Self-Assembled Monolayers

Holger Frauenrath, Reuben Yeo Jueyuan, Julian Nicolas Bleich

Aluminum alloys are used in advanced engineering applications as they possess a combination of favorable properties, including high strength, lightweightness, good corrosion resistance, machineability, and recyclability. Such applications often require for ...

2024

Supramolecular modification of sustainable high-molar-mass polymers for improved processing and performance

Holger Frauenrath, Marianne Liebi, Nicolas Candau, Oguzhan Oguz, Daniel Görl, Sophia Thiele, Torne Tänzer, Yevhen Hryshunin, Shuichi Haraguchi, Matthieu Claude Wendling

The plastic waste crisis is among humanity’s most urgent challenges. However, widespread adoption of sustainable plastics is hindered by their often inadequate processing characteristics and performance. Here, we introduce a bio-inspired strategy for the m ...

Nature Research2025

Two-Fold Odd-Even Effect in Self-Assembled Nanowires from Oligopeptide-Polymer-Substituted Perylene Bisimides

Holger Frauenrath, Roman Niklaus Marty, Robin Nigon, Deborah Leite

Organic nanowires are important building blocks for nanoscopic organic electronic devices. In order to ensure efficient charge transport through such nanowires, it is important to understand in detail the molecular parameters that guide self-assembly of pi ...

Amer Chemical Soc2014

Polyamide material

John Christopher Plummer, Holger Frauenrath, Nicolas Candau, Sylvain Cyril Claude Galland

The invention relates to a polyamide material containing a polyamide as the matrix polyamide and fibrillar polyamide particles, wherein at least 10 vol.% of the fibrillar polyamide particles, based on the total volume of the fibrillar polyamide particles, ...

2018

Composition containing a polymer and an additive

John Christopher Plummer, Holger Frauenrath, Daniel Görl

The invention describes a composition containing a) a functionalized polymer (10) that comprises at least one polymer segment (13) and at least two polymer aggregating segments (11,12) capable of forming non-covalent bonds based on a supramolecular interac ...

2019

Polymer-bridged Nanofibrils in a High-molar-mass Polyester via Co-assembly of Benzenetricarboxamide End Groups and an Additive

John Christopher Plummer, Holger Frauenrath, Daniel Görl, Sophia Thiele, Michael Alan Giffin, Matthieu Claude Wendling

Benzenetricarboxamide (BTA) derivatives are versatile compounds widely employed as nucleating agents in commercial semicrystalline plastics and as supramolecular ligands in self-assembling telechelic polymer-based organogels, hydrogels, and bulk elastomers ...

ROYAL SOC CHEMISTRY2025

Thermoplastic Toughening of a Semiaromatic Polyamide with an Amino-telechelic Polyethylene

John Christopher Plummer, Holger Frauenrath, Michael Alan Giffin

Semiaromatic polyamides are used for metal replacementin advancedengineering applications to reduce weight and improve efficiency,but their range of application is limited by their inherent lack ofductility and toughness. Here, we combined semiaromatic pol ...

AMER CHEMICAL SOC2023

Enhanced ductility in high performance polyamides due to strain-induced phase transitions

Véronique Michaud, John Christopher Plummer, Holger Frauenrath, Pascal Alexander Schouwink, Nicolas Candau

Copolymerizing poly(hexamethylene terephthalamide-co-isophthalamide) (PA6TI) with 40 wt% polyamide 66 (PA66) results in only minor decreases in modulus and yield stress owing to isomorphous substitution of PA6TI units by PA66 units in the PA6TI alpha phase ...

ELSEVIER SCI LTD2022

Low-Temperature Preparation of Tailored Carbon Nanostructures in Water

Anna Fontcuberta i Morral, Holger Frauenrath, Vincent Laporte, Davide Demurtas, Raffaele Mezzenga, Bernt Ketterer, Tobias Hoheisel, Martin Fritzsche

The development of low-temperature carbonization procedures promises to provide novel nanostructured carbon materials that are of high current interest in materials science and technology. Here, we report a "wet-chemical" carbonization method that utilizes ...

American Chemical Society2012

Hexayne Amphiphiles and Bolaamphiphiles

Vincent Matthieu Guillaume Croué, Rosario Scopelliti, Holger Frauenrath, Reuben Yeo Jueyuan, Enzo Jean Raymond Bomal

Oligoynes with two or more conjugated carbon-carbon triple bonds are useful precursors for carbon-rich nanomaterials. However, their range of app0lications has so far been severly limited by the challenging syntheses, particularly in the case of oligoynes ...

2020

Soft-landing electrospray ion beam deposition of sensitive oligoynes on surfaces in vacuum

Klaus Kern, Holger Frauenrath, Stephan Rauschenbach, Stephen Schrettl, Gordon Rinke, Tobias Hoheisel

Characterizing the complex structure of such molecules with highly resolving, vacuum-based methods like scanning probe microscopy requires their transfer into the gas phase and further onto an atomically clean surface in ultrahigh vacuum without causing ad ...

Elsevier2015

Blends of oligopeptide terminal polyisobutylene or polystyrene

Véronique Michaud, Holger Frauenrath, Emmanuel Croisier, Su Liang

Various blends of polymers are disclosed, comprising oligopeptide functionalised polymers such as polyisobutylene and polystyrene. Mono-functionalised and di-functionalised polymers (each containing 0 to 5 peptide units beyond its terminal amide group) may ...

2014