A5006862882- Fullerene Chemistry and Applications
- Advanced Chemical Physics Studies
- Astrophysics and Star Formation Studies
- Ion-surface interactions and analysis
- Atomic and Molecular Physics
- Graphene research and applications
- Advanced Physical and Chemical Molecular Interactions
- Nuclear materials and radiation effects
- Luminescence Properties of Advanced Materials
- Advanced ceramic materials synthesis
- Advanced Semiconductor Detectors and Materials
- High-pressure geophysics and materials
- Crystallization and Solubility Studies
- Photorefractive and Nonlinear Optics
- ZnO doping and properties
- Boron and Carbon Nanomaterials Research
- Characterization and Applications of Magnetic Nanoparticles
- Photonic Crystals and Applications
- Nuclear Physics and Applications
- Iron Metabolism and Disorders
- Nanoparticle-Based Drug Delivery
- X-ray Diffraction in Crystallography
National Institute of Chemical Physics and Biophysics
2016-2024
University of Tartu
2008-2013
Abstract The cavity inside fullerene C 60 provides a highly symmetric and inert environment for housing atoms small molecules. Here we report the encapsulation of formaldehyde by molecular surgery, yielding supermolecular complex CH 2 O@C , despite 4.4 Å van der Waals length O exceeding 3.7 internal diameter . presence significantly reduces cage HOMO-LUMO gap. Nuclear spin-spin couplings are observed between host guest. rapid spin-lattice relaxation 13 nuclei is attributed to dominant...
Infrared absorption spectroscopy study of endohedral water molecule in a solid mixture H$_2$O@C$_{60}$ and C$_{60}$ was carried out at liquid helium temperature. From the evolution spectra during ortho-para conversion process, spectral lines were identified as para- ortho-water transitions. Eight vibrational transitions with rotational side peaks observed mid-infrared: $\omega_1$, $\omega_2$, $\omega_3$, $2\omega_1$, $2\omega_2$, $\omega_1 +\omega_3$, $\omega_2 $2\omega_2+\omega_3$. The...
The interactions between atoms and molecules may be described by a potential energy function of the nuclear coordinates. Nonbonded neutral or are dominated repulsive forces at short range attractive dispersion medium range. Experimental data on detailed interaction potentials for nonbonded interatomic intermolecular scarce. Here, we use terahertz spectroscopy inelastic neutron scattering to determine single He encapsulating C60 fullerene cages in helium endofullerenes 3He@C60 4He@C60,...
Abstract The influence of some impurity ions on the increase/decrease in resistance against irradiation metal oxides with X‐rays and electrons (low‐dense excitation) or ∼2 GeV Au 198 U 238 providing a superhigh density electronic excitations along cylindrical tracks (LET > 30 keV nm −1 ) has been investigated for fcc MgO single crystals close ion masses Lu 3 Al 5 O 12 Gd 2 SiO large unit cells heavy cations. radiation effects have studied using methods low‐temperature vacuum ultraviolet...
We studied the quantized translational motion of single He atoms encapsulated in molecular cages by terahertz absorption. The temperature dependence THz absorption spectra 3He@C60 and 4He@C60 crystal powder samples was measured between 5 220 K. At K there is an line at 96.8 cm-1 (2.90 THz) 81.4 cm (2.44 4He@C60, while additional lines appear higher temperature. An anharmonic spherical oscillator model with a displacement-induced dipole moment used to spectra. Potential energy terms powers...
We used THz (terahertz) and INS (inelastic neutron scattering) spectroscopies to study the interaction between an endohedral noble gas atom C60 molecular cage. The absorption spectra of powdered A@C60 samples (A = Ar, Ne, Kr) were measured in energy range from 0.6 75 meV for a series temperatures 5 300 K. measurements carried out at liquid helium temperature transfer 0.78 54.6 meV. are dominated by one line, 7 12 meV, low three atoms studied. line shifts higher broadens as is increased....
Nanoparticles with SiO2 coating were synthesized to have a cubic iron core. These found saturation magnetization very close the highest possible value of any iron-containing nanoparticles and bulk magnetization. The in vitro toxicology studies show that they are highly biocompatible possess better MRI contrast agent potential than oxide NPs.