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

被引：4

作者：

Culebras, M. ^{[1
]}

Madronero, A. ^{[2
]}

Mota, C. ^{[2
]}

Gomez, C. M. ^{[1
]}

Amo, Jose M. ^{[2
]}

Cantarero, A. ^{[1
]}

机构：

[1] Univ Valencia, Mat Sci Inst, Valencia 46071, Spain

[2] CENIM CSIC, Madrid 28040, Spain

来源：

RADIATION EFFECTS AND DEFECTS IN SOLIDS | 2014年 / 169卷 / 07期

关键词：

gamma-ray; X-ray; XRD; electronics; INDUCED DIMENSIONAL CHANGES; HYDROGEN STORAGE; NANOTUBES; GRAPHITE;

D O I：

10.1080/10420150.2014.910939

中图分类号：

TL [原子能技术]; O571 [原子核物理学];

学科分类号：

0827 ; 082701 ;

摘要：

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 gamma-rays produced by radioisotopes Co-60, 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 gamma-rays irradiation produces changes in the crystallite size and shape.

引用

页码：620 / 627

页数：8

共 32 条

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