REQUIREMENTS
Students applying for internships must either be awarded credits for their work (e.g. master thesis) or provide their own funding (e.g. non-credited summer internship).
Registered EPFL bachelor and master students
You should organise your agenda to be on site, in Geneva, for at least a full day per week. The travel costs between EPFL Lausanne and EPFL Geneva will be covered.
External students from a partner University
The list of partner universities can be found here. To join the LSBI, you should register first through EPFL academic services – please check the following website for additional information.
External students from a non-partner University
You are welcome to apply to join the LSBI, but you will need to find your own funding source e.g. a scholarship, a grant, etc.
Fellowship
Foreign students are welcome to apply to one of the following schemes to join the LSBI for a summer, a semester or a year-long internship.
EPFL Excellence in Engineering, E3 program for Summer internship
Zeno Karl Schindler Summer School grant
Swiss Government Excellence Fellowship
INTERNSHIP, SEMESTER AND MASTER PROJECTS
Direct electrical stimulation of the pancreas
Semester project
The project is about the development of an implantable neural interface to perform experiments in which directly stimulate the pancreas of mice/rodents to elicit insulin secretion. The goal is to further progress the experiments with direct electrical stimulation of the pancreas in acute experiments and to develop an entire wireless interface to be implanted in the host body chronically.
Project’s goals:
- Take part in the current acute experiment to determine the best electrical stimulation parameters (amplitude, frequency, pulse width…)
- Define the different modules that will be part of the monolithic system (wireless modules, power management modules, bioelectronic modules) and assess their communication
- Take part in the design, fabrication and mechanical/electrical characterization of the realized interfaces.
Must have:
- Motivation and interest in the application of neural interfaces in novel domains
- Knowledge in neuro-electrophysiology (action potentials, ion channels…)
- Knowledge on electrical circuits
- Knowledge on microcontrollers, FPGAs and communication protocols
Nice to have:
- Knowledge of sensors, actuators for IoT applications
- Knowledge of data acquisition and data handling
- Knowledge of CAD use and 3D printing
To apply: Pietro Palopoli
Integrated electronics on neural interface for neural disease treatment
Master thesis
The project is about the integration of active electronics onto our standard passive neural interfaces to realize a compact wireless and closed-loop system. If successful, it will be further developed for the treatment of epilepsy and spinal cord injury.
Project’s goal:
- Improvement and testing of a flip chip bonding technique between soft substrate and electronic chips
- Test a novel bonding technique using electroplating
- Define, fabricate (the antenna) and test the wireless module for communication and data transfer (Bluetooth low energy and HDL coding)
- Define, fabricate (the Tx and Rx coils) and test the functionality of the wireless power transfer modules (power electronics and battery)
- Define, fabricate and test (electrically, mechanically, functionally) the entire system
- Define and take part in animal experimentation
Must have:
- Medium/advanced knowledge of electrical circuits.
- Programming knowledge (C or C++ or Python & Verilog or VHDL)
- Motivation and interest into neural interfaces
Nice to have:
- Knowledge of antennas and RF communication
- Knowledge of Power electronics and wireless power transfer
- Knowledge in Mechanics and Material science
To apply: Pietro Palopoli
Development of multifunctional electronic skin based on electrofluidic microneedle arrays
Master thesis
This project focuses on the development of an innovative epidermal patch featuring electrofluidic microneedle arrays designed to painlessly penetrate the human epidermis. Our objective is to engineer a multifunctional electronic skin device that delivers electrical signals and injects fluids with high resolution. The device is fabricated leveraging LSBI expertise in microfabrication techniques of soft substrates using advanced, biocompatible materials, incorporating integrated electrical and fluidic systems to enable both precise drug delivery and accurate biosignal monitoring.
This project will consist on the optimization of the fabrication process, taking especially care of the final device assembly and the integration of the cleanroom fabricated components with external flexible PCBs or microfluidic chips. The project will also involve rigorous testing of the device’s electromechanical properties, initially in laboratory settings, followed by animal studies to evaluate biocompatibility and functionality. With successful preliminary outcomes and necessary ethical approvals, we plan to conduct trials on human subjects to test its capabilities in enhancing sensory feedback and physiological monitoring.
Must-have competencies:
- Problem-solving mentality
- Independence and motivation
- Basic concepts of biomedical engineering
Nice-to-have competencies:
- General knowledge in materials science
- Experience in microfluidics and microelectronics
- Cleanroom experience
References:
- Tehrani F., Teymourin H., Wuerstle B. et al.An integrated wearable microneedle array for the continuous monitoring of multiple biomarkers in interstitial fluid. Biomed. Eng (2022). https://doi.org/10.1038/s41551-022-00887-1
- Wang H., Pastorin G., Chengkuo L. et al. Toward Self-Powered Wearable Adhesive Skin Patch with Bendable Microneedle Array for Transdermal Drug Delivery. Advanced Science (2016). https://doi.org/10.1002/advs.201500441
To apply: Emilio Fernandez Lavado
Electrical stimulation of cultured pancreatic beta-cells for insulin secretion
Semester project
The project is about the realization of microelectrode arrays on which we will culture pancreatic beta-cells. Once the beta-cells are ready we will electrically stimulate the cells to determine which electrical stimulation protocol is the best to determine a release of insulin. This will be a first step in the development of an implantable interface (cyborg pancreas) formed by cultured b-cells stimulated electrically using our microelectrode arrays to elicit insulin secretion for the host body.
Project’s goals:
- Design/co-design the MEAs used for cell cultures
- Design, fabricate, and test culture systems (via CAD, laser cutting, 3D printing) in which the MEA will be mounted (including the biosensors for insulin detection)
- Seed pancreatic cell lines and assess their growth on the MEA
- Electrically stimulate the cells and observe their responses (changes in growth, insulin secretion)
- Collect and analyze data
Must have:
- Motivation and interest in the application of neural interfaces in novel domains
- Knowledge in neuro-electrophysiology (action potentials, ion channels…)
- Knowledge on microcontrollers
Nice to have:
- Knowledge of sensors, actuators for IoT applications
- Knowledge of data acquisition and handling
- Knowledge of CAD and 3D printing
- Knowledge of cell culture
- Knowledge of microfluidic
To apply: Pietro Palopoli
Optimization of kirigami patterns for stretchable interconnects
Semester project / Master thesis
Long-term implantation of neural interfaces in dynamic environments, such as the cervical spinal cord is challenging. Indeed, the implant must be able to accommodate for a wide range of motion to avoid displacement of the device or breakage. To address this issue, a technology was developed within the LSBI to fabricate soft neural interfaces based on the engineering of stretchable interconnects, encapsulated in between two layers of silicone. The stretchability of the interconnects is achieved by micro-patterning periodic cuts (also referred to as kirigami) into thin sheets of Polyimide/Platinum/Polyimide [1]. The main challenge of this technique is to achieve both high conductivity and high stretchability. The high conductivity is necessary to deliver currents at the electrode site in a range that is sufficient to recruit the targeted neurons. Reversible stretchability of the device is key in ensuring that the components can deform following the movement of the surrounding tissue, thereby reducing the mechanical mismatch that can lead to fibrotic encapsulation of the implant, typically seen with rigid implants.
The aim of this project is to optimize the patterning of the interconnects to satisfy application-specific conductivity and stretchability requirements. In particular, the student will conduct a study on networks of serpentines. Due to their sinuous geometry, serpentines unfold under tensile strain, resulting in spring-like mechanical behavior. Varying the shape of each serpentine unit and their connection pattern gives rise to a vast collection of electro-mechanical properties. The deformation and electrical resistance of the patterned networks will be computed through custom code. The student will participate in the development of a robust optimization scheme that will allow for a network geometry that minimizes both local strain and resistance depending on a given set of conditions. These conditions include material properties, interconnect dimensions, type of deformation, …
Once the optimization scheme is set in place, experimental validation will be conducted. Ultimately, we aim to obtain a user-friendly interface to accelerate and help guide the next design iterations of neural implants, such as cervical spinal cord implants.
Project goals:
- Implement a script to that identifies the optimal serpentine network.
- Provide an analysis of performance of the optimization scheme.
- Define the design specifications for a set of conditions.
- Conduct experimental validation.
Must have:
- Python coding experience
- Knowledge of optimization principles and algorithms
- Good understanding of mechanics and material properties
Nice to have:
- Experience with simulation software (COMSOL, ABAQUS)
To apply:
References
- Nicolas Vachicouras. Soft microfabricated neural implants: a path towards translational implementation. 2019.