The Department of Sustainable and Bio-inspired Materials at the Max Planck Institute of Colloids and Interfaces (MPICI), led by Prof. Dr. Silvia Vignolini, invites applications for a postdoctoral researcher to join an ambitious project focused on the hydration-governed colloidal stability of sustainable nanocellulose. This research aims to bridge sustainable processing with fundamental colloid science, enhancing the sustainability of bio-based material building blocks. The project is part of the Max Planck Society’s Sustainability Network “SusMax,” which advances renewable materials through fundamental insights into colloidal science, precision interfacial engineering, and mechanistic understanding. The successful candidate will work in the group of Dr. Wenyang Xu, collaborating closely with the Max Planck Institute of Polymer Research. The position offers a stimulating, interdisciplinary environment within the vibrant scientific community of MPICI, access to state-of-the-art infrastructure for surface and material characterization, and remuneration according to TVöD-Bund up to pay group E13. Additional benefits include flexible working hours, public sector social benefits, a company kindergarten, job ticket subsidy, and on-campus sports and dining facilities. Key research responsibilities include investigating the colloidal stability of cellulose nanoparticles, developing and evaluating physicochemical surface modifications, designing and applying advanced surface/interfacial measurement strategies, and elucidating the cellulose-water interfacial structure and dynamics. The role requires a PhD in chemistry or materials science, with a strong background in soft matter, surface and interface science, or physical chemistry. Experience with colloids, surface/interfacial characterization, and techniques such as SAXS/WAXS, neutron methods, XPS, AFM, QCM-D, or ITC is highly desirable. Strong data analysis, scientific writing skills, and the ability to work both independently and collaboratively are essential. Research experience with nanocellulose is advantageous but not required. Good English language skills are necessary. The position is full-time, initially for 12 months with the possibility of extension, and is available from January 1, 2026. The Max Planck Society is committed to gender equality, diversity, and the inclusion of individuals with disabilities, and encourages applications from all qualified candidates, especially women and underrepresented groups. Applications should be submitted via the online application management tool, including a CV, publication list, motivation letter (max 2 pages), a brief project contribution statement (max 1 page), and two references. For more information about the department and application process, visit the provided links.