Classification and characterization of gold and nickel nanoparticles with a differential mobility analyzer

Yasutomo Naono, Sayuri Kawabata, Seung H. Huh, Atsushi Nakajima

Research output: Contribution to journalArticle

14 Citations (Scopus)

Abstract

Ultrafine gold and nickel nanoparticles (NPs) were fabricated by pulsed laser ablation in helium gas, and the NPs 2-15 nm in diameter were selectively classified by an electrostatic size-selection technique employing a low-pressure differential mobility analyzer (LP-DMA). In the classification of the NPs, a chain of several gold NPs or doubly charged NPs were produced as well as singly charged spherical NPs. The morphological selection was performed with the LP-DMA, using a relationship in which the cross section of the spherical NP chains was governed by the product of the diameter and the length, instead of by the square of the diameter. Below a blocking temperature of about 100 K, the Ni NPs that were 3.1 nm in diameter exhibited ferromagnetism.

Original languageEnglish
Pages (from-to)209-215
Number of pages7
JournalScience and Technology of Advanced Materials
Volume7
Issue number2
DOIs
Publication statusPublished - 2006 Mar 1

Keywords

  • Differential mobility analyzer
  • Gold
  • Laser ablation
  • Magnetism
  • Nanoparticles
  • Nickel
  • Size selection

ASJC Scopus subject areas

  • Materials Science(all)

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