Ultrafast Laser Based Fabrication of Biomimetic Micro/Nano Structured Surfaces

Contact Person(s):
Dr. Emmanuel Stratakis


The project aims at the development of novel ultrafast laser processing schemes for the 3-dimensional biomimetic modification at micro- and nano- scales of a variety of substrates, including biopolymers.


Research Topics
Ultrafast Laser Micro- and Nano- processing


Nature inspires us in tailoring the surface energy of materials based on synergetic effects between chemical composition and surface morphology. We have developed an efficient method to achieve controlled dual scale rough surfaces by femtosecond laser structuring of planar silicon wafers. It is possible, by varying the laser pulse fluence on the surface, to achieve a systematic and reproducible variation of roughness at micro- and nano-length scales which mimics the hierarchical morphology as well as the wetting response of natural water repellent surfaces. The superhydrophobic and self-cleaning properties of the high roughness ratio artificial surfaces were compared to that of the Lotus (Nelumbo Nucifera) leaf, one of the most water repellent surfaces found in nature, and remarkable similarities were observed. Alternatively, the different structures obtained by this method can be advantageously transferred to a variety of polymerics substrates, including biopolymers, through replication molding techniques. Further control over wettability can be achieved by altering the surface chemistry by coating the structures with various conformal layers, while keeping the same morphology. As a consequence, it is possible to preferentially tune the wettability of the artificial substrates from superhydrophobic to superhydrophilic through a proper combination of surface topography and chemistry.


 Dr. Vasilia Zorba, Lawrence Berkeley National Laboratory.

 Y. Hosokawa, Graduate School of Materials Science, Nara Institute of Science and Technology, Ikoma, Nara, Japan.


  • Free-standing graphene on microstructured silicon vertices for enhanced field emission properties
    Stratakis E.*, Eda G., Yamaguchi,H. Kymakis E., Fotakis C., Chhowalla M., Advances in Protein Chemistry and Structural Biology, Nanoscale, 2012

  • Tailoring the wetting properties of polymers from highly hydrophilic to superhydrophobic using UV laser pulses
    Pazokian, H., Selimis, A., Barzin, J., Jelvani, S., Mollabashi, M., Fotakis, C., Stratakis E., Journal of Micromechanics and Microengineering, 22, 035001, 2012

  • Properties of Silicon and Metal Oxide Electrowetting Systems
    Papadopoulou, E.L.; Zorba, V. Stratakis E, Fotakis, C., Journal of Adhesion Science and Technology, 26, 2143, 2012

  • Leaf surface characteristics and wetting in Ceratonia siliqua L.
    • Kolyva, F, Stratakis E, Rhizopoulou, S., Chimona, C, Fotakis, C, Flora, 207 551-556, 2012

  • Biomimetic micro/nanostructured functional surfaces for microfluidic and tissue engineering applications
    E. Stratakis, A. Ranella, and C. Fotakis, Biomicrofluidics, 5, 013411, 2011

  • Controlling cell adhesion via replication of laser micro/nano-textured surfaces on polymers
    N. Koufaki, A. Ranella, K. E Aifantis, M. Barberoglou, S. Psycharakis, C. Fotakis, E. Stratakis , Biofabrication, 3, 045004, 2011

  • Silicon Scaffolds Promoting 3D Neuronal Web of Cytoplasmic Processes
    E.L. Papadopoulou, A. Samara, M. Barberoglou, A. Manousaki, S.N. Pagakis, E. Anastasiadou, C. Fotakis and E. Stratakis, Tissue Engineering Part C, 16, 497, 2010

  • Ultrafast electron dynamics in ZnO/Si micro-cones
    E. Magoulakis, E.L. Papadopoulou, E. Stratakis, C. Fotakis, P.A. Loukakos, Applied Physics A, 98, 701, 2010

  • Three-dimensional carbon nanowall field emission arrays
    E. Stratakis, R. Giorgi, M. Barberoglou, Th. Dikonimos, E. Salernitano, N. Lisi, and E. Kymakis , Applied Physics Letters, 96, 043110, 2010

  • Tuning cell adhesion by controlling the roughness and wettability of 3D micro/nano silicon structures
    A. Ranella, M. Barberoglou, S. Bakogianni, C. Fotakis, E. Stratakis, Acta Biomaterialia, 6, 2711, 2010

  • From Superhydrophobicity and Water Repellency to Superhydrophilicity: Smart Polymer-Functionalized Surfaces
    E. Stratakis, A. Mateescu, M. Barberoglou, M. Vamvakaki, C. Fotakis and S. H. Anastasiadis, Chemical Communications, 46, 4136, 2010

  • Bio-inspired water repellent surfaces produced by ultrafast laser structuring of silicon
    M. Barberoglou, V. Zorba, E. Stratakis, E. Spanakis, P. Tzanetakis, S.H. Anastasiadis and C. Fotakis, Applied Surface Science, 255, 5425, 2009

  • Reversible Photoinduced Wettability Transition of Hierarchical ZnO Structures
    E.L. Papadopoulou, M. Barberoglou, V, Zorba, A. Manousaki, A. Pagkozidis, E. Stratakis and C. Fotakis, Journal of Physical Chemistry C, 113, 2891, 2009

  • Laser-based micro/nanoengineering for biological applications
    E. Stratakis, A. Ranella, M. Farsari, and C. Fotakis, Progress in Quantum Electronics, 33, 127, 2009

  • Ultraviolet laser structuring of silicon carbide for cold cathode applications
    E. Spanakis, J. Dialektos, E. Stratakis, V. Zorba, P. Tzanetakis and C. Fotakis, Physica Status Solidi C, 5, 3309, 2008

  • Tailoring the wetting response of silicon surfaces via fs laser structuring
    V. Zorba, E. Stratakis, M. Barberoglou, E. Spanakis, P. Tzanetakis, C. Fotakis, Applied Physics A, 93, 819, 2008

  • Biomimetic artificial surfaces quantitatively reproduce the water repellency of a Lotus leaf
    V. Zorba, E. Stratakis, M. Barberoglou, E. Spanakis, P. Tzanetakis, S.H. Anastasiadis and C. Fotakis, Advanced Materials, 20, 4049, 2008

  • Applications of ultrafast lasers in materials processing: Fabrication on self-cleaning surfaces and scaffolds for tissue engineering
    C. Fotakis, M. Barberoglou, V. Zorba, E. Stratakis, E. L. Papadopoulou, A. Ranella, K. Terzaki, and M. Farsari, Proceedings of SPIE, Laser Physics and Applications 2008, 2008

  • Novel Aspects of Materials Processing by Ultrafast Lasers: From Electronic to Biological and Cultural Heritage Applications
    C. Fotakis, V. Zorba, E. Stratakis, P. Tzanetakis, I. Zergioti, D. G. Papagoglou, K. Sambani, G. Filippidis, M. Farsari, P. Pouli, G. Bounos, S. Georgiou, Journal of Physics: Conference Series, 59, 266, 2007

  • Field Emission properties of arrayed and continuous areas of laser fabricated Silicon microstructures
    V. Zorba, E. Stratakis, E. Spanakis, D.G. Papazoglou, I. Zergioti, P.Tzanetakis and C.Fotakis, Journal of Nanoengineering and Nanosystems, 220, 143, 2007

  • Silicon electron emitters fabricated by ultraviolet laser pulses
    V. Zorba, P. Tzanetakis, C. Fotakis, E. Spanakis, E. Stratakis, D.G. Papazoglou, I. Zergioti, Applied Physics Letters, 88, 081103, 2006

  • Making silicon hydrophobic: wettability control by two-lengthscale simultaneous patterning with femtosecond laser irradiation
    V. Zorba, L. Persano, D. Pisignano, A. Athanassiou, E. Stratakis, R. Cingolani, P. Tzanetakis and C. Fotakis, Nanotechnology, 17, 3234, 2006

Project Members
Dr. Emmanuel Stratakis
Ms. Maria Sygletoy
Ms. Chara Simitzi
Mr. Ioannis Paradisanos
Ms. Xristina Yiannakoy
Dr. Giorgos Tsibidis
Prof. Costas Fotakis
Prof. Spiros Anastasiadis
Dr. Anthi Ranella

Last Updated:  7/5/2013