Publications de Esther Amstad | EPFL Graph Search

Direct laser writing of electronically conductive microstructures within soft hydrogel substrates

Stéphanie Lacour, Esther Amstad, Outman Akouissi, Lorenzo Lucherini

Hydrogels have emerged as promising materials for bioelectronic interfaces due to their tissue-like properties and high-water content. However, conventional hydrogels often suffer from poor electrical conductivity and mechanical stability, limiting their p ...

2025

Direct Ink Writing of Rigid Microparticles

Esther Amstad

Direct ink writing (DIW) enables 3D printing of macroscopic objects with well-defined structures and compositions that controllably change over length scales of order 100 µm. Unfortunately, only a limited number of materials can be processed through DIW be ...

2025

Microstructured thermo-responsive double network granular hydrogels

Esther Amstad, Alexandra Thoma

Thermo-responsive double network granular hydrogels made of microgels with open micrometer-sized pores can lift up to 85% of their own weight and respond up to 3-fold faster to changes in temperature than bulk counterparts are introduced. ...

Royal Society of Chemistry (RSC)2025

Mechanoreceptive soft robotic molluscoids made of granular hydrogel-based organoelectronics

Esther Amstad, Josephine Anna Eleanor Hughes, Nana Obayashi, Lorenzo Lucherini, Francesca Bono

The viscoelasticity of many soft polymers renders flexible sensors susceptible to hysteresis and signal drift that limit their accuracy. To reduce the impact of viscoelasticity on the signal without compromising the softness of the material, we introduce e ...

2025

3D printing of self-healing longevous multi-sensory e-skin

Esther Amstad, Josephine Anna Eleanor Hughes, Sudong Lee, Francesca Bono

Electrically conductive hydrogels can simulate the sensory capabilities of natural skin, such that they are well-suited for electronic skin. Unfortunately, currently available electronic skin cannot detect multiple stimuli in a selective manner. Inspired b ...

Springer Science and Business Media LLC2025

Size‐Selective Functionalization of Sugars and Polyols Using Zeolites for Renewable Surfactant Production

Esther Amstad, Jeremy Luterbacher, Songlan Sun, Seongmin Jin

Diol functionalization with acetals in carbohydrates and polyols is ubiquitously used in protection chemistry and in the manufacture of several platform chemicals. However, the selective functionalization of molecules where multiple acetalization reactions ...

Wiley2025

Control of Buckling of Colloidal Supraparticles

Esther Amstad, Gaia De Angelis

The properties of clusters of colloidal particles, often termed supraparticles, are determined by the arrangement of the primary particles. Therefore, controlling the structure formation process is of key importance. While buckled morphologies can result f ...

Wiley2025

3D Printing of Stiff Photonic Microparticles into Load-Bearing Structures

Esther Amstad

Structural colors are bright and possess a remarkable resistance to light exposure, humidity, and temperature such that they constitute an environmentally friendly alternative to chemical pigments. Unfortunately, upscaling the production of photonic struct ...

2025

Electrostatically Reinforced Double Network Granular Hydrogels

Esther Amstad, John Martin Kolinski, Chenzhuo Li, Tianyu Yuan

Rapid advances in biomedical applications and soft robotics demand load-bearing soft materials that can be processed into complex 3D shapes. Direct ink writing (DIW) enables the fabrication of customizable shapes with locally varying compositions. Hydrogel ...

WILEY2025

Bioprinting of piezoresistive organohydrogel networks for advanced real-time mechanosensing in engineered tissue models

Esther Amstad

Understanding biomechanics in 3D cell culture is key to advancing tissue engineering, yet integrating real-time sensing into soft tissues remains a challenge. We developed a stretchable, piezoresistive hydrogel by combining PEDOT:PSS with a polyvinyl alcoh ...

2025