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

denormsts

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