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Esther Amstad

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Related publications (100)

Recycling of Load-Bearing 3D Printable Double Network Granular Hydrogels

Alvaro Lino Boris Charlet, Esther Amstad, Matteo Hirsch, Sanjay Phileas Schreiber

Sustainable materials, such as recyclable polymers, become increasingly important as they are often environmentally friendlier than their one-time-use counterparts. In parallel, the trend toward more customized products demands for fast prototyping methods ...

WILEY-V C H VERLAG GMBH2022

Succinic Acid Based Particles as Carriers of Volatile Substances

Aysu Ceren Okur, Esther Amstad

Volatile substances are in high demand, especially in cosmetic and pharmaceutical applications. To prolong their shelf-life and prevent their degradation if exposed to air, these volatile substances are often encapsulated. Most frequently, matrix materials ...

AMER CHEMICAL SOC2022

From vesicles to materials: bioinspired strategies for fabricating hierarchically structured soft matter

Esther Amstad

Certain organisms including species of mollusks, polychaetes, onychophorans and arthropods produce exceptional polymeric materials outside their bodies under ambient conditions using concentrated fluid protein precursors. While much is understood about the ...

ROYAL SOC2021

Tailored Double Emulsions Made Simple

Esther Amstad

Double emulsions, such as water-in-oil-in-water droplets, are important material platforms for conducting fundamental research and for technological applications. To date, well-defined double-emulsion droplets consisting of a single water core and a thin o ...

Wiley-V C H Verlag Gmbh2021

Load-bearing hydrogels ionically reinforced through competitive ligand exchanges

Esther Amstad, Mathias Steinacher, Matteo Hirsch, Ran Zhao

Fast advances in soft robotics and tissue engineering demand for new soft materials whose mechanical properties can be interchangeably and locally varied, thereby enabling, for example, the design of soft joints within an integral material. Inspired by nat ...

ROYAL SOC CHEMISTRY2021

Shape retaining self-healing metal-coordinated hydrogels

Raffaele Mezzenga, Alvaro Lino Boris Charlet, Esther Amstad

Metal-coordinated hydrogels are physical hydrogels entirely crosslinked by complexes between ligand decorated polymers and metal ions. The mechanical properties of these hydrogels strongly depend on the density and dynamics of metal-coordinated interaction ...

2021

Temperature-induced liquid crystal microdroplet formation in a partially miscible liquid mixture

Esther Amstad

Liquid-in-liquid droplets are typically generated by the partitioning of immiscible fluids, e.g. by mechanical shearing with macroscopic homogenisers or microfluidic flow focussing. In contrast, partially miscible liquids with a critical solution temperatu ...

ROYAL SOC CHEMISTRY2021

Reversible and Broad-Range Oxygen Sensing Based on Purely Organic Long-Lived Photoemitters

Esther Amstad, Efe Armagan, René M. Rossi

The detection of oxygen (O-2) by optical sensors is of growing importance, for example, in biology, life science, environmental science, and aerodynamics, where the composition of gases is crucial for many applications. Purely organic optical O-2 sensors a ...

2021

Linear triglycerol-based fluorosurfactants show high potential for droplet-microfluidics-based biochemical assays

Abhishek Kumar Singh, Esther Amstad, Irvine Lian Hao Ong

Fluorosurfactants have expanded the landscape of high-value biochemical assays in microfluidic droplets, but little is known about how the spatial geometries and polarity of the head group contribute to the performance of fluorosurfactants. To decouple thi ...

ROYAL SOC CHEMISTRY2021

Monodisperse Selectively Permeable Hydrogel Capsules Made from Single Emulsion Drops

Huachuan Du, Esther Amstad, Alice Cont, Mathias Steinacher, Alexandre Louis André Persat

Capsules are often used to protect chemical and biological entities from the environment, to control the timing and location of their release, or to facilitate the collection of waste. Their performance depends on the thickness and composition of their she ...

2021

Controlling the calcium carbonate microstructure of engineered living building materials

Lyesse Laloui, Esther Amstad, Dimitrios Terzis, Alexandra Clarà Saracho, Hannes Markus Peter, Matteo Hirsch, Lorenzo Lucherini

The fabrication of responsive soft materials that enable the controlled release of microbial induced calcium carbonate (CaCO3) precipitation (MICP) would be highly desirable for the creation of living materials that can be used, for example, as self-healin ...

Royal Society of Chemistry2021

Shear Stress-Responsive Polymersome Nanoreactors Inspired by the Marine Bioluminescence of Dinoflagellates

Esther Amstad, Antoine Claude Jean Vian

Some marine plankton called dinoflagellates emit light in response to the movement of surrounding water, resulting in a phenomenon called milky seas or sea sparkle. The underlying concept, a shear-stress induced permeabilisation of biocatalytic reaction co ...

Wiley-VCH Verlag GmbH2021

Reversible Oxygen Sensing Based on Multi-Emission Fluorescence Quenching

Esther Amstad, Akin Gürsoy, Efe Armagan, Claudio Toncelli, René M. Rossi

Oxygen is ubiquitous in nature and it plays a key role in several biological processes, such as cellular respiration and food deterioration, to name a few. Currently, reversible and non-destructive oxygen sensing is usually performed with sensors produced ...

2020

3D Printing of Strong and Tough Double Network Granular Hydrogels

Alvaro Lino Boris Charlet, Esther Amstad, Matteo Hirsch

Many soft natural tissues display a fascinating set of mechanical properties that remains unmatched by manmade counterparts. These unprecedented mechanical properties are achieved through an intricate interplay between the structure and locally varying the ...

2020

Microfluidics of binary liquid mixtures with temperature-dependent miscibility

Stefan Guldin, Esther Amstad

Liquid-liquid microfluidic systems rely on the intricate control over the fluid properties of either miscible or immiscible mixtures. Herein, we report on the use of partially miscible binary liquid mixtures that lend their microfluidic properties from a h ...

ROYAL SOC CHEMISTRY2020

Everything in its right place: controlling the local composition of hydrogels using microfluidic traps

François Gallaire, Michael David Kessler, Esther Amstad

Many natural materials display locally varying compositions that impart unique mechanical properties to them which are still unmatched by manmade counterparts. Synthetic materials often possess structures that are well-defined on the molecular level, but p ...

ROYAL SOC CHEMISTRY2020

Additives: Their Influence on the Humidity- and Pressure-Induced Crystallization of Amorphous CaCO3

Camelia Borca, Alan Böhlen, Huachuan Du, Esther Amstad, Mathias Steinacher, Clémence Courrégelongue

Nature possesses a unique control over the formation of CaCO3 crystals that imparts fascinating mechanical properties to many CaCO3-based biomaterials. This high level of control is, at least in part, achieved through the use of certain soluble additives t ...

AMER CHEMICAL SOC2020

Nacre-inspired Hard and Tough Materials

Huachuan Du, Esther Amstad

Nature fabricates materials with properties that are difficult to reproduce with manmade counterparts. For example, nacre, composed of layers of CaCO3 crystals that are interspaced with small quantities of organic components, is one of the toughest known b ...

2019

Bioinspired Viscoelastic Capsules: Delivery Vehicles and Beyond

Esther Amstad, Gianluca Nicolas Etienne, Irvine Lian Hao Ong

Microcapsules are often used as individually dispersed carriers of active ingredients to prolong their shelf life or to protect premature reactions with substances contained in the surrounding. This study goes beyond this application and employs microcapsu ...

Wiley2019

Polymeric structures

Huachuan Du, Esther Amstad

A polymeric structure comprising a plurality of spherical or polyhedral polymeric cells bound through their sidewalls via a connection element, wherein the polymeric cells and the connection element have a different Young's modulus. ...

2019

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