Biomimetic systems

Currently I'm working on biomimetic systems, creating and studying systems that resemble the ones found in the nature. We have successfully created artificial cilia that pump fluid and several kinds of artificial microswimmers. The results were published in PNAS and Biomicrofluidics and featured in News & Views section of Nature Physics with more papers in preparation. The work is done in collaboration with Faculty of Mathematics and Physics.

Soft Matter 14, 3415, 2018

Beilstein J. Nanotechnol. 3, 163, 2012 (download pdf)

Biomicrofluidics 5, 034103, 2011 (download pdf)

Proc. Natl. Acad. Sci. 107, 1844, 2010 (download pdf)

News in Nat. Phys. 6, 8, 2010 (download pdf)



Artifical cilia

Nematic colloids

Nematic colloids

My other interest are liquid crystals, especially nematic colloidal systems. We study interactions between colloidal particles in anisotropic liquids by magneto-optical tweezers. The setup is a combination of optical tweezers with magnetic field, which allows manipulation of superparamagnetic beads. Interesting phenomena have been observed and the results were published in two Phys. Rev. Lett. papers. Also this work is done in collaboration with Faculty of Mathematics and Physics.

Phys. Rev. Lett. 101, 237801, 2008 (download pdf)

Proc. of SPIE 7038, 70381W, 2008 (download pdf)

Phys. Rev. Lett. 96, 207801, 2006 (download pdf)

Mol. Cryst. Liq. Cryst. 450, 297, 2006 (download pdf)


Nanomaterials

I'm also involved in research of nanomaterials, especially decoration of molybdenum-based nanowires and nanotubes with noble-metal nanoparticles. The decoration of the nanomaterials is the key to a broad range of applications of these materials.

R. Soc. open sci.7, 200783, 2020

Mat. Chem. Phys. 226, 20, 2019

RSC Adv. 6, 90806, 2016 (download pdf)

Mat. Lett. 159, 333, 2015 (download pdf)

J. Nanopart. Res. 15, 1791, 2013 (download pdf)


Nanomaterials

Liquid crystals

Anchoring of liquid crystals

A lot of research was done on interactions between liquid crystals and aligning surfaces. Using dynamic light scattering experiment, the anchoring coefficients of nematic liquid crystals (5CB and 8CB) on aligning layers (nylon and photoactive PVCi) were determined and the temperature dependence of the anchoring coefficients was observed. The experimental method is based on observations of thermally excited orientational fluctuations in the sample.

Liq. Crys. 40, 1646, 2013 (download pdf)

Phys. Rev. E 68, 031704, 2003 (download pdf)

Phys. Rev. E 65, 041712, 2002 (download pdf)

Phys. Rev. E 63, 061709, 2001 (download pdf)


Molecular Motors

I was also involved in single molecule biophysics in collaboration with Matthias Rief and his group at (now) TU Munich. Working with combined optical tweezers and fluorescence microscopy experiment we investigated the stepping kinetics of molecular motor Myosin V under different external conditions, i.e. external load. The motor can be pulled in both directions - forwards and backwards - and under extreme conditions, we observed backward steps - which should be forbidden!

Biophys. J. 88, 4402, 2005 (download pdf)




Molecular Motors