Welcome to the homepage of the Laboratory of Process Technology and the NeptunLab

New PhD positions available
Can you turn heat into a liquid? Help us develop a technology which captures the heat of summer to use in winter!
Glassomer on the cover of Science
Our revolutionary Glassomer materials have been used for Computed Axial Lithography CAL at UC Berkeley for printing glass and made it to the cover of Science Magazine.
Glassomer Technology published in Science
Our worldwide unique technology of glass making is published in Science - check out how glasses will be made in the future!
Gips Schüle Nachwuchs Award
Frederik Kotz has received the Young Researcher Award of the Gips Schüle Stiftung
Our first Nature paper!
Three-dimensional printing of transparent fused silica glass

Recent publications

L. Hambitzer, J. M. Hornbostel, R. Prediger, S. Kluck, Michael Daub, Cornelia Lee-Thedieck, F. Kotz-Helmer "Multiscale Structuring of Hydroxyapatite via Two-Photon Lithography of Nanocomposites", Advanced Functional Materials 2026, e17592 | Link

L. Hambitzer, R. Prediger, Y. Sun, J. Toombs, Z. Hosneolfat, R. Montazeri, S. Kluck, H. Taylor, F. Kotz-Helmer "Computed axial lithography of multioxide glasses and ceramics from nanoparticles and organic–inorganic precursors", Additive Manufacturing Letter 2025, 15, 100334 | Link 

L. Hambitzer, Z. Hosneolfat, K. Griebenow, R. Prediger, S. Kluck, Ines Ketterer, Shaher Bano Zaidi, D. S. Brauer, F. Kotz-Helmer, "High-Resolution Stereolithography of Amorphous, Dense and Mechanically Stable Bioactive Glass", Advanced Materials Technologies 2025, e00925 | Link

N. Nekoonam, S.A. Sheikholeslami, S. Tisato, P. Zhu, R. Montazeri, Z. Hosneolfat, and D. Helmer*, z-GrAdd – Facile fabrication of various functional gradient materials by 3D printing using the gradual addition of reagents, Additive Manufacturing, 2025, 101, 104713  | Link

L. Hambitzer, J. Hornbostel, L. Roolfs, R. Prediger, S. Kluck, K. Zhneng, C. Lee-Thedieck, F. Kotz-Helmer, "Bioactive Glass Microscaffolds Fabricated by Two-Photon Lithography", Advanced Materials 2025, 2504475 | Link