Mechanism of critical catalyst size effect on MgO nanowire growth by pulsed laser deposition

Takeshi Yanagida, Kazuki Nagashima, Hidekazu Tanaka, Tomoji Kawai

Research output: Contribution to journalArticlepeer-review

44 Citations (Scopus)


The size controllability of oxide nanowires formed via vapor-liquid-solid (VLS) mechanism is desired for the oxide nanowire-based device applications. However, the complex nature of oxide nanowire VLS growth has held back such size controllability. Here we demonstrate the critical size effect of a Au catalyst on MgO nanowire VLS growth by pulsed laser deposition. The presence of a critical catalyst size was found. Above such critical size, an oxide nanowire VLS growth is no longer feasible. Interestingly, such critical size increased with increasing growth temperature. The mechanism of the critical phenomenon is interpreted in terms of the catalyst size dependence on the amount of adatoms diffused from surroundings into the catalyst.

Original languageEnglish
Article number016101
JournalJournal of Applied Physics
Issue number1
Publication statusPublished - 2008
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • General Physics and Astronomy


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