Ferromagnetic Behaviour of Anthropogenic Multi-Walled Carbon Nanotubes Trapped in Spider Web Indoor

被引：30

作者：

Sonkar, Sumit Kumar ^{[1
]}

Tripathi, Kumud Malika ^{[1
]}

Sarkar, Sabyasachi ^{[2
]}

机构：

[1] Indian Inst Technol, Dept Chem, Kanpur 208016, Uttar Pradesh, India

[2] Bengal Engn & Sci Univ, Dept Chem, Bot Garden, Sibpur 711103, Howrah, India

来源：

JOURNAL OF NANOSCIENCE AND NANOTECHNOLOGY | 2014年 / 14卷 / 03期

关键词：

Black Carbon; Anthropogenic; Spider Web; Carbon Nanotubes; Ferromagnetism; PARTICULATE AIR-POLLUTION; BLACK CARBON; HUMAN HEALTH; SINGLE-WALL; NANO-ONIONS; COMBUSTION; NANOPARTICLES; NANOMATERIALS; ACTIVATION; DITHIOLENE;

D O I：

10.1166/jnn.2014.8524

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

Black carbon (BC) (as partly burnt black particulate matter) present indoor are deposited on interior surfaces of the indoors (easily visualize over the blades of electric fan/exhausts and over domestic spider webs) are known to be a potential indoor pollution problem. We detect with the help of indoor spider webs the floating BC contains a significant amount of defective multiwalled carbon nanotubes (MWCNTs) possessing room temperature ferromagnetism. Microscopic studies shows a lot of internal and surfacial defects in these indoor-MWCNTs. Electron paramagnetic resonance (EPR) showed the presence of very stable carbon centred radicals in these indoor-MWCNTs. Room temperature ferromagnetism most importantly originated by the presence of a large amount of unpaired spin frustrated carbon centred radicals (trapped in defects, junctions and fractures) which are inadvertently formed during the pyrolysis of carbonaceous materials through routine domestic activities.

引用

页码：2532 / 2538

页数：7

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