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Changes in the thermoelectric response of vitreous carbon due to the irradiation by γ-rays

AutorCulebras, Mario; Madroñero de la Cal, Antonio; Mota, César; Gómez, Clara M.; Amo, José M.; Cantarero, Andrés
Palabras claveXRD
X-ray
γ-ray
Electronics
Fecha de publicación2014
EditorTaylor & Francis
CitaciónRadiation Effects and Defects in Solids 169 (7): 620-627 (2014)
ResumenIn 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.
URIhttp://hdl.handle.net/10261/114121
DOI10.1080/10420150.2014.910939
Identificadoresdoi: 10.1080/10420150.2014.910939
issn: 1029-4953
Aparece en las colecciones: (CENIM) Artículos
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