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RESEARCH PRODUCT
Changes in the thermoelectric response of vitreous carbon due to the irradiation by γ-rays
Clara M. GómezCesar MotaAntonio MadroñeroAndrés CantareroJ. M. AmoMario Culebrassubject
Nuclear and High Energy PhysicsRadiationMaterials scienceγ-raybusiness.industryXRDAnalytical chemistrychemistry.chemical_elementGlassy carbonCondensed Matter PhysicsAmorphous solidX-rayCrystallographySemiconductorchemistrySeebeck coefficientThermoelectric effectGeneral Materials ScienceCrystalliteIrradiationsense organsElectronicsbusinessCarbondescription
In order to study variations in the thermoelectric properties, some commercial glassy carbon samples were subjected to a sequence of steps consisting of a combination of irradiation with γ-rays produced by radioisotopes 60Co, and hydrogen adsorption when the samples were put in an over pressured atmosphere of this gas. With this procedure it was possible to observe that the irradiation decreases the electrical conductivity of glassy carbon samples and the hydrogenation changes the sign of Seebeck coefficient. The material initially is an n-type semiconductor, but with hydrogenation changes to p-type semiconductor. X-ray diffraction analysis showed that the hydrogenated vitreous carbon is more amorphous than the pristine material and the γ-rays irradiation produces changes in the crystallite size and shape. © 2014 Taylor & Francis.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2014-05-13 | Radiation Effects and Defects in Solids 169 |