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Esther Amstad

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Publications associées (100)

From Surfactants to Viscoelastic Capsules

Esther Amstad, Gaia De Angelis, Natascha Ilena Gray

Micrometer sized capsules are often used as single entities for the encapsulation and release of active ingredients, for example in food, cosmetics, and drug delivery. Important parameters that determine the stability of capsules and the release of reagent ...

WILEY2023

4D printing of Metal-Reinforced double network granular hydrogels

Esther Amstad, Matteo Hirsch, Josephine Anna Eleanor Hughes, Qinghua Guan, Livia D'Onofrio

Recent developments in soft actuation demand for resilient, responsive materials with locally varying compositions that are sufficiently stiff to exhibit significant actuation forces. Hydrogels are inherently responsive to certain stimuli. Yet, they typica ...

2023

Porous 3D Printable Hydrogels

Esther Amstad, Matteo Hirsch

Hydrogels are interconnected, polymeric networks filled with water. Their inherent responsiveness to different stimuli, including the presence of salt, solvents, or, depending on their composition, changes in pH or temperature, renders them attractive for ...

Wiley2023

Charge-Selectively Permeable Self-Healing Microcapsules

Esther Amstad, Chuen-Ru Li

Microcapsules possessing a selective permeability are well-suited vessels for conducting cell studies or chemical reactions that require selective exchanges of reagents over a prolonged time. Most currently reported microcapsules are single-use delivery ca ...

WILEY2023

Additive Manufacturing of Porous Biominerals

Esther Amstad, Matteo Hirsch, Gaia De Angelis, Ran Zhao, Tianyu Yuan

Nature fabricates hard functional materials from soft organic scaffolds that are mineralized. To enable an energy-efficient locomotion of these creatures while maintaining their structural stability, nature often renders parts of these minerals porous. Unf ...

WILEY-V C H VERLAG GMBH2023

Influence of Sphericity on Surface Termination of Icosahedral Colloidal Clusters

Esther Amstad

Colloids self-organize into icosahedral clusters composed of a Mackay core and an anti-Mackay shell under spherical confinement to minimize the free energy. This study explores the variation of surface arrangements of colloids in icosahedral clusters, focu ...

Wiley-V C H Verlag Gmbh2023

Rheological Properties of Ionically Crosslinked Viscoelastic 2D Films vs. Corresponding 3D Bulk Hydrogels

Esther Amstad, Gaia De Angelis

Ionically crosslinked hydrogels containing metal coordination motifs have piqued the interest of researchers in recent decades due to their self-healing and adhesive properties. In particular, catechol-functionalized bulk hydrogels have received a lot of a ...

AMER CHEMICAL SOC2023

Hydrogel-Encased Photonic Microspheres with Enhanced Color Saturation and High Suspension Stability

Esther Amstad

Regular arrays of colloidal particles can produce striking structural colors without the need for any chemical pigments. Regular arrays of colloidal particles can be processed into microparticles via emulsion templates for use as structural colorants. Phot ...

Amer Chemical Soc2023

3D printing of living structural biocomposites

Esther Amstad, Matteo Hirsch, Lorenzo Lucherini, Ran Zhao

Nature fabricates organic/inorganic composites under benign conditions, yet, in many cases, their mechanical properties exceed those of the individual building components it is made from. The secret behind the evolutionary pivot is the unique ability of na ...

ELSEVIER SCI LTD2023

Controlling the crystal structure of succinic acid via microfluidic spray-drying

Aysu Ceren Okur, Esther Amstad

Many properties of materials, including their dissolution kinetics, hardness, and optical appearance, depend on their structure. Unfortunately, it is often difficult to control the structure of low molecular weight organic compounds that have a high propen ...

ROYAL SOC CHEMISTRY2023

Influence of the Degree of Swelling on the Stiffness and Toughness of Microgel-Reinforced Hydrogels

Michael David Kessler, Esther Amstad, John Martin Kolinski, Tianyu Yuan

The stiffness and toughness of conventional hydrogels decrease with increasing degree of swelling. This behavior makes the stiffness-toughness compromise inherent to hydrogels even more limiting for fully swollen ones, especially for load-bearing applicati ...

WILEY-V C H VERLAG GMBH2023

Hydroelastomers: soft, tough, highly swelling composites

Michael David Kessler, Esther Amstad

Inspired by the cellular design of plant tissue, we present an approach to make versatile, tough, highly water-swelling composites. We embed highly swelling hydrogel particles inside tough, water-permeable, elastomeric matrices. The resulting composites, w ...

ROYAL SOC CHEMISTRY2022

Editorial

Esther Amstad

SWISS CHEMICAL SOC2022

Additive manufacturing inks or resins and additive manufactured structures

Alvaro Lino Boris Charlet, Esther Amstad, Matteo Hirsch

The invention relates to additive manufacturing inks and resins; methods of using said inks and resins in additive manufacturing; and additive manufactured articles made using said inks and resins. ...

2022

Deterministic scRNA-seq captures variation in intestinal crypt and organoid composition

Matthias Lütolf, Bart Deplancke, Saba Rezakhani, Esther Amstad, Riccardo Dainese, Julie Marie Russeil, Antonius Chrisnandy, Vincent Roland Julien Gardeux, Johannes Julius Bues, Marjan Biocanin, Rita Sarkis, Jörn Pezoldt

DisCo is a deterministic droplet microfluidics tool for single-cell analysis on low cell input samples, which is demonstrated to profile individual intestinal organoids and in vivo-derived small tissues. ...

NATURE PORTFOLIO2022

Does the Size of Microgels Influence the Toughness of Microgel-Reinforced Hydrogels?

Michael David Kessler, Esther Amstad

Rapid advances in the biomedical field increasingly often demand soft materials that can be processed into complex 3D shapes while being able to reliably bear significant loads. Granular hydrogels have the potential to serve as artificial tissues because t ...

WILEY-V C H VERLAG GMBH2022

Spray-Assisted Formation of Micrometer-Sized Emulsions

Esther Amstad, Mathias Steinacher

Emulsion drops with defined sizes are frequently used to conduct chemical reactions on picoliter scales or as templates to form microparticles. Despite tremendous progress that has been achieved in the production of emulsions, the high throughput formation ...

AMER CHEMICAL SOC2022

Mechanical reinforcement of granular hydrogels

Alvaro Lino Boris Charlet, Esther Amstad, Francesca Bono

Granular hydrogels are composed of hydrogel-based microparticles, so-called microgels, that are densely packed to form an ink that can be 3D printed, injected or cast into macroscopic structures. They are frequently used as tissue engineering scaffolds bec ...

ROYAL SOC CHEMISTRY2022

Reinforcing hydrogels with in situ formed amorphous CaCO3

Michael David Kessler, Huachuan Du, Esther Amstad, Matteo Hirsch, Ran Zhao, Tianyu Yuan

Hydrogels are often employed for tissue engineering and moistening applications. However, they are rarely used for load-bearing purposes because of their limited stiffness and the stiffness-toughness compromise inherent to them. By contrast, nature uses hy ...

ROYAL SOC CHEMISTRY2022

Extraction and Surfactant Properties of Glyoxylic Acid-Functionalized Lignin

Jeremy Luterbacher, Esther Amstad, Stefania Bertella, Gaia De Angelis

The amphiphilic chemical structure of native lignin, composed by a hydrophobic aromatic core and hydrophilic hydroxy groups, makes it a promising alternative for the development of bio-based surface-active compounds. However, the severe conditions traditio ...

2022

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