PhD Candidate in Light Controlled Variable Stiffness for Soft Robotics / PhD Candidate in Light Controlled Variable Stiffness for Soft Robotics

PhD Position in Light Controlled Variable Stiffness for Soft Robotics

100%, Zurich, fixed-term

The Robotic Materials group is seeking a highly motivated PhD student to explore the topic of light-programmable stiffness for reconfigurable soft devices and robots. This four-year PhD position is funded by our ERC Starting Grant.

Project Background

The introduction of fiber optics in the 1970s revolutionized the telecommunications industry by replacing copper wires and significantly contributing to the Information Age. One high-bandwidth fiber optic cable can replace thousands of electrical links, transmitting the same amount of information. In parallel, the fields of soft devices and robotics controlled by electrical signals are thriving, with soft optics emerging as a new frontier. This innovative platform utilizes the modulation of light in soft matter to encode multifunctionalities within the optical path.

The first part of this project will focus on developing light-stimulated stiffness programming methods that exceed current variable stiffness benchmarks. The second part will apply these principles to various soft device and robot systems, demonstrating reconfigurability and multifunctionality for real-world tasks.

Job Description

• Creation of methods to program material stiffness in-situ using light, focusing on achieving high stiffness contrast (rigid-soft), rapid transition (1 second), and a compact form factor (millimeter scale).
• Characterization and theoretical understanding development through multiphysics simulations.
• Design, development, and fabrication of an active soft robotic morphing surface for reconfigurable shape and texture camouflage.
• Design, development, and fabrication of reconfigurable soft robotic actuators for in-situ programming of actuation modality and force.
• Demonstration of robotic and biomedical devices for practical applications through collaborations.
• Supervision of master's and bachelor's students.
• Teaching assistant for the robotic materials class.

This is a full-time position that can start as soon as possible. Apply online using the form below. Only applications matching the job profile will be considered.

Profile

• Master’s degree in Materials Science and Engineering, Mechanical Engineering, or related fields from a distinguished university.
• Candidates with strong research backgrounds in soft robotics, smart materials, or related fields (particularly those with experience in variable stiffness materials and robots) are highly encouraged to apply.
• Excellent problem-solving skills and a passion for interdisciplinary research.

Workplace

ETH Zurich offers a stimulating work environment merging academic excellence with industry collaboration.

What We Offer

• A productive working environment with regular training and guidance from the Principal Investigator.
• Competitive salary according to ETH standards (fully funded, full-time, fixed-term position).
• An interdisciplinary, international, and diverse team, fostering a stimulating and collaborative atmosphere.
• Strong connections with academic, industrial, and clinical partners in materials science, robotics, and healthcare.

We Value Diversity and Sustainability

ETH Zurich promotes an inclusive culture that values diversity and equality of opportunity. We nurture a working environment that respects the rights and dignity of all our staff and students. Sustainability is a core value for us, and we are committed to achieving a climate-neutral future.

Curious? So Are We.

We look forward to receiving your application with the following documents as a single PDF:

• A cover letter
• Curriculum Vitae
• Publication list, if applicable, with brief descriptions of representative works
• Contact details of two referees
• Transcripts of academic records

Applications will be reviewed on a rolling basis until the position is filled. The preferred start date is as soon as possible in the second quarter of 2026. For further information, please contact Prof. Hedan Bai at hedan.bai@mat.ethz.ch.

About ETH Zurich

ETH Zurich is among the world's leading universities specializing in science and technology. Renowned for our exceptional education and cutting-edge fundamental research, we facilitate the direct transfer of new knowledge into society. With over 30,000 individuals from more than 120 countries, our university promotes independent thinking in an environment that inspires excellence. Located in the heart of Europe, we forge connections globally to address today’s and tomorrow's challenges.