Chiral transport controlled by flow microstructure

In nature, many tiny organisms, like bacteria and algae, move in fascinating ways. Some are spiral- shaped, like many bacteria, while others move in helical patterns, such as sperm cells or algae. This twisting, spiral-like shape or motion is called "chiral," and it plays a surprising role in shaping the world around us. For example, chirality helps mucus flow in our lungs, influences how embryos develop, and affects how microorganisms move through their environments. This project focuses on understanding how chirality impacts the movement of microorganisms, especially in complex environments. Why does this matter? Because microorganisms are everywherethey can spread through soil, water, and even medical devices. Their movement can lead to contamination, biofilm formation (like the slimy layers on surfaces), or even the spread of diseases. By understanding how these tiny swimmers move, we can develop ways to control their transport, prevent contamination, and even design better tools for medical and environmental applications. Most previous research has studied microorganisms in simple environments, like open water or near flat surfaces. But real-world environments are much more complexthink of bacteria moving through porous soil or flowing through the intricate structures of the human body. This project aims to bridge that gap by studying how chirality affects microorganism movement in these more realistic, complex settings. To tackle this challenge, the project combines cutting-edge experiments and advanced computer modeling. On the experimental side, researchers will use new technologies to create 3D environments that mimic various aspects of real-world conditions. Theyll also use advanced tracking methods and artificial intelligence to follow the movement of individual bacteria. On the theoretical side, the team will develop models and simulations to understand how chirality interacts with complex flows and structures. The ultimate goal is twofold: first, to uncover the fundamental principles of how chirality influences microorganism transport, and second, to use this knowledge to control their movement. For example, this could help prevent bacterial contamination in medical devices, improve soil decontamination techniques, or even inspire new designs for biomedical tools. This research is a collaboration between two international groups: one specializing in experiments (lead by Prof. Anke Lindner, ESPCI Paris) and the other in theoretical modeling (lead by Dr. Andreas Zöttl, University of Vienna). By combining their efforts, they hope to unlock new insights into the hidden world of microorganisms and their impact on our lives.