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Fullerenes, nanotubes, and related carbon nanostructures
Our research interests are in this field focused on
- stability of lower and higher fullerenes and their derivatives under irradiation at various wavelengths (from NIR to VUV spectral region) in different environments,
- implications of stability studies to the cosmogeochemistry of fullerenes,
- solution chemistry, photophysics, and photochemistry of carbon nanotubes,
- photochemical and thermal behavio ur of composed, binary carbon nanostructures, e.g. fullerene-metal nanocomposites and fullerene peapods,
- radiation chemistry of the carbon nanostructures.
Equipment
HPLC layout optimized for fullerene analysis:
- diode array detector (Well Chrom Knauer), wavelength range 200–600 nm,
- analytical column (250 × 4.6 mm) and,
- semipreparative column (250 × 10 mm) packed with Cosmosil Buckyprep sorbent.
Selected publications
L. Juha, J. Krása, L. Láska, V. Hamplová, L. Soukup, P. Engst, P. Kubát: Fast Degradation of Fullerenes by Ultraviolet Laser Radiation, Appl. Phys. B57, 83–84 (1993).
L. Juha, V. Hamplová, J. Kodymová, O. Špalek: Reactivity of Fullerenes with Chemically Generated Singlet Oxygen, J. Chem. Soc., Chem. Commun. 2437–2438 (1994).
L. Juha, V. Hamplová, P. Engst, P. Kubát, E. Koudoumas, S. Couris: Fullerene Cages Breakdown Induced in Solution by Ultraviolet Radiation: Experimental Support for the “Window” Formation in Fullerenes? J. Phys. Chem. 99, 8200–8201 (1995).
L. Láska, J. Krása, L. Juha, V. Hamplová, L. Soukup: Fullerene Production Driven by Long-Pulses of Near-Infrared Laser Radiation, Carbon 34, 363–368 (1996).
L. Juha, B. Ehrenberg, S. Couris, E. Koudoumas, V. Hamplová, Z. Pokorná, A. Müllerová, M. Pavel: Fullerene Decomposition Induced by Near-infrared Laser Radiation Studied by Real-time Turbidimetry, Chem. Phys. Lett. 313, 431–436 (1999).
L. Juha, M. Fárníková, V. Hamplová, J. Kodymová, A. Müllerová, J. Krása, L. Láska, O. Špalek, P. Kubát, I. Stibor, E. Koudoumas, S. Couris: The Role of the Oxygen Molecule in the Photolysis of Fullerenes, Fullerene Sci. Technol. 8, 289–318 (2000).
L. Juha, B. Ehrenberg, S. Couris, E. Koudoumas, S. Leach, V. Hamplová, Z. Pokorná, A. Müllerová, P. Kubát: Single-photon Photolysis of C60, C70, C76 and C84 in Solutions, Chem. Phys. Lett. 335, 539–544 (2001).
M. Kalbáč, L. Kavan, L. Juha, S. Civiš, M. Zukalová, M. Bittner, P. Kubát, V. Vorlíček, L. Dunsch: Transformation of Fullerene Peapods to Double-Walled Carbon Nanotubes Induced by UV Radiation, Carbon in press (2004).
J. Vacík, H. Naramoto, S. Kitazawa, S. Yamamoto, L. Juha: Laser-Induced Phase Separation in the NickelFullerene Nano-Composite, J. Phys. Chem. Solids 66, 581–584 (2005).