shungite;
transmission electron microscopy;
magnetic properties;
microstructure;
D O I:
10.1016/j.carbon.2004.09.030
中图分类号:
O64 [物理化学(理论化学)、化学物理学];
学科分类号:
070304 ;
081704 ;
摘要:
Carbon from shungite rocks from Karelia (Russia) displays an increase in diamagnetism between ca. 90 and 150 K. The diamagnetic effect is largest for samples that contain twisted graphene layers up to 100 nm across, preferentially oriented, and with nanometer-sized pores as seen in high-resolution transmission electron microscopy images. No increase in diamagnetism was observed for shungite rocks containing carbon with randomly oriented graphene layers. Such diamagnetism has been observed for doped fullerites but has not previously been reported for amorphous natural carbon. (C) 2004 Elsevier Ltd. All rights reserved.
机构:
Lanzhou Jiaotong Univ, Natl Engn Res Ctr Technol & Equipment Green Coati, Lanzhou 730070, Peoples R ChinaLanzhou Jiaotong Univ, Natl Engn Res Ctr Technol & Equipment Green Coati, Lanzhou 730070, Peoples R China
Wang, Chengbing
Ling, Xiaoming
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机构:
Lanzhou Jiaotong Univ, Natl Engn Res Ctr Technol & Equipment Green Coati, Lanzhou 730070, Peoples R ChinaLanzhou Jiaotong Univ, Natl Engn Res Ctr Technol & Equipment Green Coati, Lanzhou 730070, Peoples R China
Ling, Xiaoming
Shi, Jing
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h-index: 0
机构:
Lanzhou Jiaotong Univ, Sch Mechatron Engn, Lanzhou 730070, Peoples R ChinaLanzhou Jiaotong Univ, Natl Engn Res Ctr Technol & Equipment Green Coati, Lanzhou 730070, Peoples R China
Shi, Jing
Xia, Rongbin
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h-index: 0
机构:
Lanzhou Jiaotong Univ, Natl Engn Res Ctr Technol & Equipment Green Coati, Lanzhou 730070, Peoples R ChinaLanzhou Jiaotong Univ, Natl Engn Res Ctr Technol & Equipment Green Coati, Lanzhou 730070, Peoples R China