Size-reduction induced ferromagnetism and photo-magnetic effects in azobenzene-thiol-passivated gold nanoparticles

Masayuki Suda, Naoto Kameyama, Aya Ikegami, Motohiro Suzuki, Naomi Kawamura, Yasuaki Einaga

研究成果: Article査読

21 被引用数 (Scopus)

抄録

We have observed size-reduction induced ferromagnetism and significant photo-magnetic effects in azobezene-thiol-modified gold nanoparticles. When the particle size was reduced to 1.7 nm, ferromagnetism even at room temperature was observed while diamagnetism was dominating with the particle size of 5.0 nm. Furthermore, reducing the particles size to 1.7 nm also gave rise to photo-magnetic properties because the decrease in particle size provided free volume between each of the azobenzene ligands. This photo-magnetic effect could be attributed to photo-induced changes in the values of d-charge losses due to the photoisomerization of azo-ligands, which were accompanied by the inversion of surface dipole values to the opposite sign.

本文言語English
ページ(範囲)1868-1874
ページ数7
ジャーナルPolyhedron
28
9-10
DOI
出版ステータスPublished - 2009 6月 22

ASJC Scopus subject areas

  • 物理化学および理論化学
  • 無機化学
  • 材料化学

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