Synthesis, mechanical and electrical properties of carbon microcoils and nanocoils

Bi, Hui, Kou, Kaichang, Yin, Yongbai, Ostrikov, Kostya, & Liu, Zongwei (2010) Synthesis, mechanical and electrical properties of carbon microcoils and nanocoils. Functional Materials Letters, 3(4), pp. 263-267.

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Abstract

The results on the synthesis, mechanical and electrical properties of carbon microcoils and nanocoils (CMCs, CNCs) synthesized using catalytic CVD and Ni-P and Co-P catalyst alloys, respectively, are reported. SEM analysis reveals that the CMCs and CNCs have unique helical morphologies, and diameters of 5.0-9.0 μm and 450-550 nm, respectively. Moreover, CMCs with flat cross-section can be stretched to 3 times their original coil lengths. Current-voltage characteristics of a single microcoil have also been obtained. It is found that the CMCs have the electrical conductivity between 100 and 160 S/cm, whereas the electrical resistance increases by about 20% during the coil extension. Besides, the microcoils can produce light in vacuum when the test voltage reaches 10 V. The emission intensity increases as the voltage increases. The mechanical and electrical properties of CMCs and CNC make them potentially useful in many applications in micromagnetic sensors, mechanical microsprings and optoelectronics.

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ID Code: 73780
Item Type: Journal Article
Refereed: Yes
Additional URLs:
Keywords: Carbon microcoils, carbon nanocoils, chemical vapor deposition, microstructure
DOI: 10.1142/S179360471000138X
ISSN: 1793-6047
Divisions: Current > QUT Faculties and Divisions > Science & Engineering Faculty
Deposited On: 11 Jul 2014 03:58
Last Modified: 14 Jul 2014 01:32

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