Calorimetric and Positron Lifetime Measurements οf Hydrogenated Carbon Nanocones

• Authors: A. Budziak , J. Dryzek , J. Krawczyk , P. Zieliński
• Languages of publication: EN

Abstracts

EN

Two carbon nano-structured samples containing 5 and 20% of carbon nanocones in their volume were investigated. Using the Sieverts apparatus the hydrogen was loaded into the samples. The measurements of heat capacity in the temperature range from 100 K to 320 K and the positron lifetime measurements at the room temperature were performed for hydrogenated and non-hydrogenated carbon nanocones. The desorption of hydrogen at the temperature of 230 K is deduced from the heat capacity measurements. The detection of the positronium, the bound state of positron and electron, in the measured samples reveals the presence of open volume defects of ca. 0.198 ± 0.002 nm.

Keywords

EN

81.05.U-; 78.70.Bj

Discipline

• 78.70.Bj: Positron annihilation(for positron states, see 71.60.+z in electronic structure of bulk materials; for positronium chemistry, see 82.30.Gg in physical chemistry and chemical physics)
• 81.05.U-: Carbon/carbon-based materials(for carbon-based superconductors, see 74.70.Wz)

• Publisher: Institute of Physics, Polish Academy of Sciences
• Journal: Acta Physica Polonica A
• Year: 2010
• Volume: 117
• Issue: 4
• Pages: 574-577

Dates

published

2010-04

Contributors

author

A. Budziak

• Institute of Nuclear Physics PAN, E. Radzikowskiego 152, 31-342 Kraków, Poland

author

J. Dryzek

• Institute of Nuclear Physics PAN, E. Radzikowskiego 152, 31-342 Kraków, Poland
• Institute of Physics, University of Opole, Oleska 48, 45-052 Opole, Poland

author

J. Krawczyk

• Institute of Nuclear Physics PAN, E. Radzikowskiego 152, 31-342 Kraków, Poland

author

P. Zieliński

• Institute of Nuclear Physics PAN, E. Radzikowskiego 152, 31-342 Kraków, Poland

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Identifiers

DOI

10.12693/APhysPolA.117.574