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On the cover page of Physica status solidi

Our work on the “Microscopic Study of Bovine Serum Albumin Adsorption on Zinc Oxide (0001) Surface” has been recently published in Physica status solidi and selected for the journal cover page.

The cover page of Physica status solidi has been for many years presenting the international scientific community with high-quality research in the field of materials science and solid state physics.  Properties and functions of various ZnO materials are intensively investigated in biological systems for diagnostics, therapy, health risks assessment as well as bactericidal and decontamination purposes. In our work, the interface between ZnO and biological environment was studied by characterizing adsorption of bovine serum albumin (BSA) and fetal bovine serum (FBS) using atomic force microscopy with CF4‐treated tips. Similar molecular morphologies (thickness around 2 nm) yet different binding forces to ZnO (10 – 25 nN) were observed. These observations are corroborated by atomic scale simulations of BSA on (0001) ZnO surface using a force‐field method and showing rearrangements of zinc surface atoms. Such binding may have an impact also on other properties of ZnO–BSA complex. The work has been done jointly by the teams from the Czech Technical University in Prague and the Institute of Physics of the Czech Academy of Sciences within the international GACR-MOST project with the National Pingtung University in Taiwan.


Jan Fait received the Dean’s Award for a prestigious dissertation

The Dean of the Faculty of Electrical Engineering CTU Prof. Mgr. Petr Páta, Ph.D. awarded the Dean’s Award for a prestigious dissertation thesis to Dr. Jan Fait on March 10. The topic of the dissertation is Fabrication and characterization of diamond photonic structures. The supervisor was Prof. Bohuslav Rezek from the Department of Physics and supervisor specialist Dr. Lukáš Ondič from the Institute of Physics of the Czech Academy of Sciences. The research was conducted in a close cooperation between the Czech Technical University in Prague and the Institute of Physics.

Jan Fait studies photonic structures that serve to achieve maximal detection efficiency of photons emitted by color centers in diamond. These centers have a number of interesting features that find use in quantum communication, sensorics or biomedicine. Maximized detection of photons is crucial for these applications. Jan Fait focuses both on the optimization of photonic structures and on new methods of their fabrication using a thin layer of amorphous silicon. The results of the work were published in scientific journals with significant number of citations and presented at international conferences. The dissertation is available for view on Dspace ČVUT.

Distance learning – we demonstrate free fall :-)

An integral part of our Physics course are the experiments demonstrated in the lab. Our very modern lab offers a vast selection of experiments that the students can conduct first-hand, under normal circumstances. Due to Covid-19 restrictions the learning moved to an online space, so we are trying to introduce experiments to our students in other ways.

We have created multimedia presentations of the lectures containing the actual demonstration of the experiment with the teacher’s commentary. One of the experiments covered in the course Physics 1 is a study of “Free Fall“. The experiment is elegantly simple: by measuring the duration of the fall of a steel ball from varying heights, we can determine the acceleration due to gravity in Prague (more specifically, in our 4th floor lab in Dejvice). Moreover, this experiment is also helpful for understanding how gravity and other forces affect an object in motion, both here on Earth and in the outer space. The instructions for the experiments are available to students on Moodle.

On the cover page of Carbon

Our work on the “Bio-chemically selective interaction of hydrogenated and oxidized ultra-small nanodiamonds with proteins and cells” has been recently published in Carbon [Machova et al., Carbon 162 (2020) 650-661, doi:10.1016/j.carbon.2020.02.061] and selected for the journal front cover page (pdf).  Ultra-small nanoparticles of a size smaller than or comparable to cell membrane pores (1-5 nm) have significant potential in biomedicine. In our study, we performed a systematic in vitro investigation of fundamental bio-chemical interactions of such ultra-small hydrogenated and oxidized detonation nanodiamonds (DNDs) with biomolecules and human cells. We applied mass spectrometry methods (LC-MS/MS) for the qualitative and quantitative analysis of the protein corona as a function of the surface chemistry and size of DNDs. We observed that protein interactions with DNDs are more related to their surface chemistry (H/O-termination) rather than size. Bioinformatics characterization of the identified proteins pointed to the strong influence of electrostatic interaction between proteins and DNDs depending on their surface termination. Such specific interaction lead to formation of different protein corona on hydrogenated or oxidized 2 nm DNDs, which influenced also their interaction with cells including different level of cytotoxicity. The work has been done jointly by the teams from Charles University in Prague, Czech Academy of Sciences and Czech Technical University in Prague.

The cover art shows schematically how ultra-small (2 nm) nanodiamonds control formation of protein corona. The nanodiamonds are shown as nanocrystals with carbon atom lattice having hydrogenated surfaces (blue) or oxidized surfaces (red). Actual chemical groups are not shown on the surface for simplicity. Each type of nanodiamonds interacts preferentially with different types of proteins thus forming a specific corona, which is depicted by different protein structure and coloring. Structures of proteins in blue are shown in specific interaction with hydrogenated nanodiamonds, structures of proteins in red are shown in specific interaction with oxidized nanodiamonds.

On the cover of the Journal of Applied Physics

The Journal of Applied Physics highly appreciated a research work “DC-driven atmospheric pressure pulsed discharge with volume-distributed filaments in a coaxial electrode system” carried out by employees of the Department of Physics, FEE CTU. The Editorial Office of the Journal of Applied Physics selected the work as the lead cover article in the eighth issue, vol. 126, 2019 of the Journal (https://doi.org/10.1063/1.5113950).

Reproduced from the Journal of Applied Physics 126(8), 28 August 2019, with the permission of AIP Publishing.

VZLUSAT-1 – still in the orbit

The VZLUSAT-1 nanosatellite was developed on the basis of a standardized CubeSat 2U platform (20x10x10cm) in the Czech Aerospace Research Centre (VZLU) in cooperation with Czech companies and universities.

Nanosatellite VZLUSAT-1 in laboratory

Ing. Ladislav Sieger from Department of Physics led the successfully defended master’s thesis of Ing. Veronika Stehlíková, Ing. Martin Urban and Ing. Ondřej Nentvich from the Department of Radio Electronics. They engaged in the development, construction and testing of the satellite together with Ing. Tomáš Báka.

On June 23, 2017, the two-kilogram Czech nanosatellite VZLUSAT-1 was transported to the Earth’s orbit using the PSLV-C38 rocket launched from Indian space spaceport at Sri Charikota Island.

Doctoral student Petra Matunová awarded at the Computational Nanotechnology conference

PhD student Petra Matunová from Institute of Physics CAS and Department of Physics at CTU FEL presented a poster entitled “Computing interfacial properties of polypyrrole on diamond nanoparticles for photovoltaic applications” at the International Workshop on Computational Nanotechnology (IWCN 2017, Windermere, UK). This poster was announced by the organizers as one of the five best student posters of the conference.

Sound waves in metamaterials and porous media

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Within COST Action CA15125 DENORMS – Design for noise reducing materials and structures, Training School  “Sound waves in metamaterials and porous media” was held at CTU-FEE from September 26, 2016 to September 30, 2016, co-organized by Department of Physics of CTU-FEE. The following lectures have been delivered during the Training School:

  • Irreducible Brillouin zone/dispersion relationship in periodic structures/Plan Wave Expansion method – Prof. J. Vasseur (Univ. Lille 1, France),
  • Multiple Scattering Theory – D. Torrent (Univ. Bordeaux, France),
  • Theory of homogenization applied to porous materials – Dr. C. Boutin (École Nationale des Travaux Publics de l’État, France),
  • Sonic crystals – Dr. V. Romero-García (Laboratoire d’Acoustique de l’Univ. du Maine, France),
  • Metamaterials for sound absorption – Prof. P. Sheng (Hong Kong University of Science and Technology, Hong Kong, China),
  • Acoustic wave propagation in viscothermal fluids and nonlocal homogenization – Dr. D. Lafarge (Laboratoire d’Acoustique de l’Univ. du Maine, France),
  • Homogenization Theory applied on periodic structures – Prof. J. Sánchez Dehesa (Univ. Politècnica València, Spain),
  • Numerical methods for porous media – Prof. P. Göransson (KTH, Royal Institute of Technology, Sweden),
  • Examples of industrial use of porous materials: aeronautic industry – M. Rodrigues (Embraer Engineering and Technology Center, Portugal) / automotive industry – Dr. A. Duval (Trèves-group, France) / building  – Dr. P. Leroy (Isover Saint-Gobain CRIR, France),
  • Nonlinear acoustic wave propagation – Dr. F. Coulouvrat (Institut Jean le Rond d’Alembert, France).

Flyer, COST Action CA15125 DENORMS website