Senior Scientist

Michael Maas

Michael Maas, PD Dr. rer. nat.

Am Biologischen Garten 2
IW3, Room 2140
28359 Bremen
Tel. 0421 218 64939

Publons/ResearcherID: N-8544-2015
ORCID: 0000-0002-2352-4822
Scopus Author ID: 56948189800
Google Scholar

Research Interests

  • Colloidal assembly of multifunctional nanostructures
  • Organic/inorganic Hybrid-Materials
  • 3d Printing
  • Nanofibers
  • Thin Films
  • Microcapsules
  • Bio-Nano and Bio-Material Interactions


6/2018 Habilitation at University of Bremen
12/2005 - 02/2009 Ph.D. studies in Physical Chemistry
10/2003 – 11/2005 Diploma studies in chemistry with an emphasis on life sciences at TU Dortmund.
10/2001 – 09/2003 Undergraduate studies in chemistry at TU Dortmund.
07/1991 – 06/2000 Gymnasium Altlünen

Positions and Work Experience

05/2011 -  present Senior Scientist in the Advanced Ceramics Group, University of Bremen
03/2009 - 03/2011 Research stipend granted by the DFG on the “Self-assembly of nanoparticle thin films at the liquid-liquid interface“.
Postdoctoral fellow in the lab of Prof. G. G. Fuller, in cooperation with Prof. R. N. Zare, Chemistry Department, Stanford University.
12/2005 - 02/2009 Ph.D. studies in the lab of Prof. Dr. H. Rehage, chair of Physical Chemistry II, TU Dortmund. Dissertation in 12.2008 on “The Biomimetic Formation of Thin Films below Lipid Monolayers” 
05 - 11/2005 Diploma thesis on “Basics of Biomineralization: Formation and Characterization of Thin Calcium Carbonate Films” in the lab of Prof. Dr. H. Rehage, chair of Physical Chemistry II, TU Dortmund.


Keramische Nanotechnologie



  1. Hydrophobic ceramic capillary membranes for versatile virus filtration
    Journal of Membrane Science
    Bartels, J.Batista, A.Kroll, S.Maas, M.Rezwan, K.
    2019 570-571(): p.85-92.
  2. Flow rate dependent continuous hydrolysis of protein isolates
    AMB Express
    Sewczyk, T.Hoog Antink, M.Maas, M.Kroll, S.Beutel, S.
    2018 8(1): p.18.
  3. Nanoscale Janus Particles with Dual Protein Functionalization
    Particle & Particle Systems Characterization
    Kadam, R.Zilli, M.Maas, M.Rezwan, K.
    2018 35(3): p..
  4. Mineralization of Iron Oxide by Ferritin Homopolymers Immobilized on SiO2 Nanoparticles
    Bioinspired, Biomimetic and Nanobiomaterials
    Carmona D.Treccani L.Michaelis M.Lid S.Debus C.Ciacchi L.Rezwan K.Maas M.
    2018 8(1): p.16-27.
  5. Effect of divalent versus monovalent cations on the MS2 retention capacity of amino-functionalized ceramic filters
    Physical Chemistry Chemical Physics
    Bartels, J.Hildebrand, N.Nawrocki, M.Kroll, S.Maas, M.Colombi Ciacchi, L.Rezwan, K.
    2018 20(16): p.11215-11223.
  6. Electrostatic assembly of zwitterionic and amphiphilic supraparticles
    Journal of Colloid and Interface Science
    Maas, M.Silvério, C.Laube, J.Rezwan, K.
    2017 501(): p.256-266.
  7. An evaluation of colloidal and crystalline properties of CaCO3 nanoparticles for biological applications
    Materials Science and Engineering: C
    Lauth, V.Maas, M.Rezwan, K.
    2017 78(): p.305-314.
  8. Colloidal capsules: Nano- and microcapsules with colloidal particle shells
    Chemical Society Reviews
    Bollhorst, T., Maas*, M. Rezwan, K.
    2017 (): p..
  9. Chitosan supraparticles with fluorescent silica nanoparticle shells and nanodiamond-loaded cores
    Journal of Materials Chemistry B
    Bollhorst, T., Maas*, M., Rezwan, K.
    2017 5(): p.1664-1672.
  10. Self-assembly and shape control of hybrid nanocarriers based on calcium carbonate and carbon nanodots
    Chemistry of Materials
    Lauth, V., Loretz, B., Lehr, C-M. Maas*, M., Rezwan, K.
    2016 28(): p.3796-3803.
  11. Enhancing Cellular Uptake and Doxorubicin Delivery of Mesoporous Silica Nanoparticles via Surface Functionalization: Effects of Serum
    ACS Applied Materials & Interfaces
    Shahabi, S., Döscher, S., Bollhorst, T., Treccani, L., Maas, M., Dringen, R., Rezwan, K.
    2015 (): p..
  12. Bifunctional Submicron Colloidosomes Coassembled from Fluorescent and Superparamagnetic Nanoparticles
    Angewandte Chemie International Edition
    Bollhorst, T., Shahabi, S., Wörz, K., Petters, C., Dringen, R., Maas*, M., Rezwan, K.
    2015 54(1): p.118-123.
  13. Bactericidal activity of partially oxidized nanodiamonds
    ACS Nano
    Wehling, J., Dringen, R., Zare, R. N., Maas, M., Rezwan, K.
    2014 8(6): p.6475-6483.
  14. The Contribution of Rheology for Designing Hydroxyapatite Biomaterials
    Current Opinion in Colloid and Interface Science
    Maas, M., Heß, U., Rezwan, K.
    2014 19(6): p.585-593.
  15. Diamondosomes: Submicron Colloidosomes with Nanodiamond Shells
    Particle & Particle Systems Characterization
    Maas, M., Bollhorst, T., Zare, R. N., Rezwan, K.
    2014 31(10): p.1067-1071.
  16. Coacervate-directed synthesis of CaCO3 microcarriers for pH-responsive delivery of biomolecules
    Journal of Materials Chemistry B
    Lauth, V., Maas, M., Rezwan, K.
    2014 2(): p.7725-7731.
  17. A critical study: assessment of the effect of silica particles from 15 to 500 nm on bacterial viability
    Environmental pollution
    Wehling, J., Volkmann, E.,Grieb, T.,Rosenauer, A.,Maas, M., Treccani, L.,Rezwan, Kurosch
    2013  176(): p.292-299.
  18. Towards the synthesis of hydroxyapatite/protein scaffolds with controlled porosities: Bulk and interfacial shear rheology of a hydroxyapatite suspension with protein additives
    Journal of Colloid and Interface Science
    Maas, M., Bodnar, P.M., Hess; U., Treccani; L., Rezwan, K.
    2013 407(): p.529-535.
  19. Micromolding of calcium carbonate using a bio-inspired, coacervation-mediated process
    Journal of the American Ceramic Society
    Kaempfe, P., Lauth, V. R., Halfer, T., Treccani, L., Maas, M., Rezwan, K.
    2013 96(3): p.736-742.
  20. Synthesis Route for the Self-Assembly of Submicron-sized Colloidosomes with Tailorable Nanopores
    Chemistry of Materials
    Bollhorst, T., Grieb, T., Rosenauer, A., Fuller, G., Maas, M., Rezwan, K.
    2013 25(17): p.3464-3471.
  21. Preparation of Mineralized Nanofibers: Collagen Fibrils Containing Calcium Phosphate
    Nano Letters
    Maas, M.,Guo, P.,Keeney, M.,Yang, F.,Hsu, T. M.,Fuller, G. G.,Martin, C. R.,Zare, R. N.
    2011 11(3): p.1383-1388.
  22. Thin Film Formation of Silica Nanoparticle/Lipid Composite Films at the Fluid−Fluid Interface
    Maas, M.,Ooi, C. C.,Fuller, G. G.
    2010 26(23): p.17867-17873.
  23. Biomimetic formation of thin, coherent iron oxide films under Langmuir monolayers
    Colloids and Surfaces A: Physicochemical and Engineering Aspects
    Maas, M.,Degen, P.,Rehage, H.,Nebel, H.,Epple, M.
    2010 354(1-3): p.149-155.
  24. In situ observation of maghemite nanoparticle adsorption at the water/gas interface
    The European Physical Journal - Special Topics
    Paulus, M.,Degen, P.,Schmacke, S.,Maas, M.,Kahner, R.,Struth, B.,Tolan, M.,Rehage, H.
    2009 167(1): p.133-136.
  25. A Detailed Study of Closed Calcium Carbonate Films at the Liquid−Liquid Interface
    Maas, M.,Rehage, H.,Nebel, H.,Epple, M.
    2009 25(4): p.2258-2263.
  26. Formation and Structure of Coherent, Ultra-thin Calcium Carbonate Films below Monolayers of Stearic Acid at the Oil/Water Interface
    Progr. Colloid Polym. Sci.
    Maas, M.,Rehage, H.,Nebel, H.,Epple, M.
    2008 134(): p.11-18.
  27. In Situ Observation of γ-Fe2O3 Nanoparticle Adsorption under Different Monolayers at the Air/Water Interface
    Degen, P.,Paulus, M.,Maas, M.,Kahner, R.,Schmacke, S.,Struth, B.,Tolan, M.,Rehage, H.
    2008 24(22): p.12958-12962.
  28. On the formation of calcium carbonate thin films under Langmuir monolayers of stearic acid
    Colloid Polym Sci
    Maas, M.,Rehage, H.,Nebel, H.,Epple, M.
    2007 285(12): p.1301-1311.