0000000000769099

AUTHOR

Timur Nikitin

showing 2 related works from this author

Ion irradiation of carbon nanotubes encapsulating cobalt crystals

2008

Abstract The response of multi-walled carbon nanotubes encapsulating Co nanorods to ion irradiation was studied. The irradiation experiments with medium ion energies (40–500 keV) were carried out at high temperatures and combined with transmission electron microscopy and Raman characterization of the irradiated samples. Contrary to electron irradiation and high-energy (100 MeV) ion irradiation, we did not see accumulation of pressure inside irradiated nanotubes. We found that nanotubes with Co nanorods inside were transformed to amorphous carbon rods encapsulating Co clusters with typical diameters of 3–6 nm. As Co is magnetic, such one-dimensional composite systems could be used for variou…

Materials sciencePhysics::Instrumentation and DetectorsPhysics::Medical PhysicsNanotechnology02 engineering and technologyCarbon nanotube01 natural sciencesIonlaw.inventionCondensed Matter::Materials Sciencesymbols.namesakelaw0103 physical sciencesElectron beam processingIrradiation010306 general physics021001 nanoscience & nanotechnologyCondensed Matter PhysicsAtomic and Molecular Physics and OpticsElectronic Optical and Magnetic MaterialsAmorphous carbonChemical engineeringTransmission electron microscopysymbolsNanorod0210 nano-technologyRaman spectroscopyPhysica E: Low-dimensional Systems and Nanostructures
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Conformational-Dependent Photodissociation of Glycolic Acid in an Argon Matrix

2023

Ultraviolet-induced photodissociation and photo-isomerization of the three most stable conformers (SSC, GAC, and AAT) of glycolic acid are investigated in a low-temperature solid argon matrix using FTIR spectroscopy and employing laser radiation with wavelengths of 212 nm, 226 nm, and 230 nm. The present work broadens the wavelength range of photochemical studies of glycolic acid, thus extending the understanding of the overall photochemistry of the compound. The proposed kinetic model for the photodissociation of glycolic acid proceeds from the lowest energy conformer (SSC). The model suggests that ultraviolet light induces isomerization only between the SSC and GAC conformers and between …

photochemistrymatrix isolationGeneral Medicinedissociationreaktiomekanismithydroxy acidglycolic acidisomerizationvibrational spectroscopychemical kineticshajoaminen (kemia)reaction mechanismvalokemiaglycolic acid; hydroxy acid; dissociation; isomerization; chemical kinetics; reaction mechanism; matrix isolation; vibrational spectroscopy; photochemistryPhotochem
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