Present research topics are the synthesis of layered compounds and their spontaneous delamination into nematic liquid crystalline phases of single layer nanosheets. Contrary to the standard liquid phase exfoliation that requires brut external shearing forces, 1-dimensional dissolution as applied by us, is thermodynamically driven, most gently and delivers monolayers in 100% yield. 1D dissolution is widely applicable ranging from silicates, zeolitic, oxidic layers all the way to graphite. The nanosheets obtained are applied as catalyst supports, structural colors, and to fabricate functional coatings showing excellent barrier, defogging/deicing potential and anisotropic mechanical, optical and thermal conductivity.
References:
[1] Dudko, V., Khoruzhenko, O., Weiss, S., Daab, M., Loch, P., Schwieger, W., Breu, J., “Repulsive Osmotic Delamination: 1D Dissolution of 2D Materials”, Adv. Mater. Technol. 2022, 2200553.
[2] Michels-Brito P.H., Dudko V., Wagner D., Markus P., Papastavrou G., Michels L., Breu J., Fossum J.O., “Bright, Noniridescent Structural Coloration from Clay Mineral Nanosheet Suspensions”, Sci. Adv. 2022, 8, eabl8147.
[3] Ament K., Wagner D.R., Götsch T., Kikuchi T., Kröhnert J., Trunschke A., Lunkenbein T., Sasaki T., Breu J., “Enhancing the Catalytic Activity of Palladium Nanoparticles via Sandwich-Like Confinement by Thin Titanate Nanosheets”, ACS Catal. 2021, 11, 2754.
[4] ZhuQ.L., Dai C.F, Wagner D., Khoruzhenko O., Hong W., Breu J., Zheng Q., Wu Z.L., “Patterned Electrode Assisted One-Step Fabrication of Biomimetic Morphing Hydrogels with Sophisticated Anisotropic Structures”, Adv. Sci. 2021, 8, 2102353.
[5] Wang Z., Rolle K., Schilling T., Hummel P., Philipp A., Kopera B.A.F., Lechner A. M., Retsch M., Breu J., Fytas G., “Tunable Thermoelastic Anisotropy in Hybrid Bragg Stacks with Extreme Polymer Confinement”, Angew. Chem. Int. Ed. 2020, 59, 1286.
Josef Breu received his Ph D. degree in Chemistry from the University of Regensburg in 1989 followed by a PhD at the same place in 1992. He then did a postdoc in 1992/3 at the Royal Institution, London, UK after which he returned as assistant professor to the University of Regensburg. In 2001-2002 he held a substitute professorship at LMU in Munich before being appointed full professor for solid state chemistry at the University of Bayreuth in 2003. He is vice director of the Bavarian Center for Battery Technology (BayBatt), and a member of the steering committees of the German Science Foundation funded Collaborative Research Centers 1357, "Microplastics” and 1585 “Multitrans”. In the past he was spokesperson of the Collaborative Research Centre 840, "From Particulate Nanosystems to Mesotechnology“ and coordinator of the Priority Program 1415 "Crystalline non-equilibrium phases preparation, characterization and in situ investigation of formation mechanisms. Josef Breu has authored more than 250 scientific publications on different solid state and colloidal topics.
Present research topics are the synthesis of layered compounds and their spontaneous delamination into nematic liquid crystalline phases of single layer nanosheets. Contrary to the standard liquid phase exfoliation that requires brut external shearing forces, 1-dimensional dissolution as applied by us, is thermodynamically driven, most gently and delivers monolayers in 100% yield. 1D dissolution is widely applicable ranging from silicates, zeolitic, oxidic layers all the way to graphite. The nanosheets obtained are applied as catalyst supports, structural colors, and to fabricate functional coatings showing excellent barrier, defogging/deicing potential and anisotropic mechanical, optical and thermal conductivity.
References:
[1] Dudko, V., Khoruzhenko, O., Weiss, S., Daab, M., Loch, P., Schwieger, W., Breu, J., “Repulsive Osmotic Delamination: 1D Dissolution of 2D Materials”, Adv. Mater. Technol. 2022, 2200553.
[2] Michels-Brito P.H., Dudko V., Wagner D., Markus P., Papastavrou G., Michels L., Breu J., Fossum J.O., “Bright, Noniridescent Structural Coloration from Clay Mineral Nanosheet Suspensions”, Sci. Adv. 2022, 8, eabl8147.
[3] Ament K., Wagner D.R., Götsch T., Kikuchi T., Kröhnert J., Trunschke A., Lunkenbein T., Sasaki T., Breu J., “Enhancing the Catalytic Activity of Palladium Nanoparticles via Sandwich-Like Confinement by Thin Titanate Nanosheets”, ACS Catal. 2021, 11, 2754.
[4] ZhuQ.L., Dai C.F, Wagner D., Khoruzhenko O., Hong W., Breu J., Zheng Q., Wu Z.L., “Patterned Electrode Assisted One-Step Fabrication of Biomimetic Morphing Hydrogels with Sophisticated Anisotropic Structures”, Adv. Sci. 2021, 8, 2102353.
[5] Wang Z., Rolle K., Schilling T., Hummel P., Philipp A., Kopera B.A.F., Lechner A. M., Retsch M., Breu J., Fytas G., “Tunable Thermoelastic Anisotropy in Hybrid Bragg Stacks with Extreme Polymer Confinement”, Angew. Chem. Int. Ed. 2020, 59, 1286.
Josef Breu received his Ph D. degree in Chemistry from the University of Regensburg in 1989 followed by a PhD at the same place in 1992. He then did a postdoc in 1992/3 at the Royal Institution, London, UK after which he returned as assistant professor to the University of Regensburg. In 2001-2002 he held a substitute professorship at LMU in Munich before being appointed full professor for solid state chemistry at the University of Bayreuth in 2003. He is vice director of the Bavarian Center for Battery Technology (BayBatt), and a member of the steering committees of the German Science Foundation funded Collaborative Research Centers 1357, "Microplastics” and 1585 “Multitrans”. In the past he was spokesperson of the Collaborative Research Centre 840, "From Particulate Nanosystems to Mesotechnology“ and coordinator of the Priority Program 1415 "Crystalline non-equilibrium phases preparation, characterization and in situ investigation of formation mechanisms. Josef Breu has authored more than 250 scientific publications on different solid state and colloidal topics.
