Molecular photoeffect in single- and multi-wall carbon nanotubes with physisorbed oxygen molecules
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GERU, Ion. Molecular photoeffect in single- and multi-wall carbon nanotubes with physisorbed oxygen molecules. In: Physics Letters, Section A: General, Atomic and Solid State Physics, 2017, nr. 48(381), pp. 4019-4022. ISSN 0375-9601. DOI: https://doi.org/10.1016/j.physleta.2017.10.041
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Physics Letters, Section A: General, Atomic and Solid State Physics
Numărul 48(381) / 2017 / ISSN 0375-9601

Molecular photoeffect in single- and multi-wall carbon nanotubes with physisorbed oxygen molecules

DOI:https://doi.org/10.1016/j.physleta.2017.10.041

Pag. 4019-4022

Geru Ion
 
Institute of Chemistry of the Academy of Sciences of Moldova
 
 
Disponibil în IBN: 14 mai 2018


Rezumat

The EPR spectra of high purity single-walled and multi-walled semiconducting carbon nanotubes exhibit wide resonance lines (154 ± 5 mT and 159 ± 5 mT, respectively, at room temperature). The broadening of EPR lines is due to magnetic dipole-dipole interaction with the spin-triplet ground state oxygen molecules physisorbed on the carbon nanotubes surface. Here we show that the emission of O2 molecules occurs under the photons with energy of 2.33 eV that leads to narrowing of the EPR line. The number of molecules emitted from nanotubes is proportional to the flux of incident radiation, in full analogy with the first law of the classical photoelectric effect.

Cuvinte-cheie
carbon nanotubes, Electron paramagnetic resonance, laser radiation,

Molecular photoeffect