Size and structure dependence of electronic states in thiolate-protected gold nanoclusters of Au25(SR)18, Au38(SR) 24, and Au144(SR)60

Tsutomu Ohta, Masahiro Shibuta, Hironori Tsunoyama, Yuichi Negishi, Toyoaki Eguchi, Atsushi Nakajima

研究成果: Article査読

41 被引用数 (Scopus)

抄録

The electronic states of three different sizes of compositionally precise thiolate-protected gold nanoclusters, Au25(SR)18, Au 38(SR)24, and Au144(SR)60 (R = C12H25), have been evaluated by X-ray photoemission spectroscopy. The Au 4f core-levels of the nanoclusters are well reproduced by two spectral components derived from centered core-Au and positively charged shell-Au atoms, the numbers of which are determined based on the atomic structures of the nanoclusters. The spin-orbit splitting of Au 5d5/2 and 5d3/2 in the valence band becomes narrower than that for bulk Au, depending on the cluster size, which is quantitatively characterized by a reduction in the average coordination number of Au. The Au 5d valence-band spectra also show that the charge reorganization of 5d electrons induced by interaction with thiol molecules is more significant for the 5d5/2 than the 5d3/2 orbital.

本文言語English
ページ(範囲)3674-3679
ページ数6
ジャーナルJournal of Physical Chemistry C
117
7
DOI
出版ステータスPublished - 2013 2 21
外部発表はい

ASJC Scopus subject areas

  • 電子材料、光学材料、および磁性材料
  • エネルギー(全般)
  • 物理化学および理論化学
  • 表面、皮膜および薄膜

フィンガープリント

「Size and structure dependence of electronic states in thiolate-protected gold nanoclusters of Au<sub>25</sub>(SR)<sub>18</sub>, Au<sub>38</sub>(SR) <sub>24</sub>, and Au<sub>144</sub>(SR)<sub>60</sub>」の研究トピックを掘り下げます。これらがまとまってユニークなフィンガープリントを構成します。

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