Fabrication of vertically aligned carbon nanotubes for spintronic device applications

• Type: Article in International Scientific Journal
• Date: 2009

Authors

titus, elby (Author) Other; singh, manoj k. (Author) Other; cabral, gil (Author) Other; paserin, vladimir (Author) Other; babu, p. ramesh (Author) Other; blau, werner j. (Author) Other; ventura, j. (Author) FCUP; araujo, j. p. (Author) FCUP; gracio, jose (Author) Other

Journal

Title: Journal of Materials Chemistry

Vol. 19

Pages: 7216-7221

ISSN: 0959-9428

Publisher: Royal Society of Chemistry

Indexing

ISI Web of Knowledge - 5 Citations

Scopus - 4 Citations

Other information

Authenticus ID: P-003-R1F

DOI: 10.1039/b907717k

Abstract (EN): We report on the observation of coulomb blockade and coulomb staircase at room temperature in multiwalled carbon nanotube (MWCNT) based heterostructures. The hybrid structure consists of nickel ferromagnets separated by vertically aligned MWCNTs. The MWCNTs were grown vertically on a nickel substrate by a double plasma hot filament chemical vapour deposition technique. Deposition of ferromagnetic nickel nanoparticles on the top of MWCNTs was achieved for the first time using the laser chemical vapour deposition method. The fabrication technique is unique in that it is formed of many individual ferromagnetic tunnel junctions integrated into a single system. A well defined coulomb blockade and coulomb staircase was displayed in current-voltage characteristics obtained by scanning tunnelling spectroscopy. The capacitance (1. 6 x 10(-18) F) in the system is determined from the spacing Delta V between peaks in the dI/dV curves.

Language: English

Type (Professor's evaluation): Scientific

No. of pages: 6