Encapsulation of segmented Pd-Co nanocomposites into vertically aligned carbon nanotubes by plasma-hydrogen-induced demixing

Journal Article · Mon Mar 26 00:00:00 EDT 2007 · Applied Physics Letters

DOI:https://doi.org/10.1063/1.2718268· OSTI ID:20960184

Fujita, Takeshi; Hayashi, Yasuhiko; Tokunaga, Tomoharu; Butler, T; Rupesinghe, N L; Teo, K B. K.; Amaratunga, G A. J. ^[1]

---

1. International Frontier Center for Advanced Materials, Institute for Materials Research, Tohoku University, Aoba-ku, Sendai, Miyagi 980-8577 (Japan)

Vertically aligned carbon nanotubes (VA-CNTs) filled with Pd-Co nanocomposites on an Si substrate have been synthesized by microwave plasma-enhanced chemical vapor deposition. It was confirmed that adjacent Pd-Co nanocomposites in the VA-CNTs were compositionally separated. Most CNTs contained Co pillars on top; however, Pd pillars were rarely present. The strong magnetic induction from an individual Co pillar was revealed by electron holography. The simultaneous phenomenon of the demixing by plasma hydrogen irradiation and the preferential encapsulation into CNTs realized the unique Pd-Co nanocomposites.

• OSTI ID: 20960184
• Journal Information: Applied Physics Letters, Vol. 90, Issue 13; Other Information: DOI: 10.1063/1.2718268; (c) 2007 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA); ISSN 0003-6951
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
CARBON
CHEMICAL VAPOR DEPOSITION
COBALT
COMPOSITE MATERIALS
ENCAPSULATION
HOLOGRAPHY
HYDROGEN
MICROWAVE RADIATION
NANOTUBES
PALLADIUM
PLASMA
SUBSTRATES