Crystal-face-selective adsorption of Au nanoparticles onto polycrystalline diamond surfaces

Takeshi Kondo, Shinsuke Aoshima, Kousuke Hirata, Kensuke Honda, Yasuaki Einaga, Akira Fujishima, Takeshi Kawai

研究成果: Article

19 引用 (Scopus)

抜粋

Crystal-face-selective adsorption of Au nanoparticles (AuNPs) was achieved on polycrystalline boron-doped diamond (BDD) surface via the self-assembly method combined with a UV/ozone treatment. To the best of our knowledge, this is the first report of crystal-face-selective adsorption on an inorganic solid surface. Hydrogen-plasma-treated BDD samples and those followed by UV/ozone treatment for 2 min or longer showed almost no adsorption of AuNP after immersion in the AuNP solution prepared by the citrate reduction method. However, the samples treated by UV/ozone for 10 s showed AuNP adsorption on their (111) facets selectively after the immersion. Moreover, the sample treated with UV/ozone for 40-60 s showed AuNP adsorption on the whole surface. These results indicate that the AuNP adsorption behavior can be controlled by UV/ozone treatment time. This phenomenon was highly reproducible and was applied to a two-step adsorption method, where AuNPs from different batches were adsorbed on the (111) and (100) surface in this order. Our findings may be of great value for the fabrication of advanced nanoparticle-based functional materials via bottom-up approaches with simple macroscale procedures.

元の言語English
ページ(範囲)7545-7548
ページ数4
ジャーナルLangmuir
24
発行部数14
DOI
出版物ステータスPublished - 2008 7 15

ASJC Scopus subject areas

  • Materials Science(all)
  • Condensed Matter Physics
  • Surfaces and Interfaces
  • Spectroscopy
  • Electrochemistry

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    Kondo, T., Aoshima, S., Hirata, K., Honda, K., Einaga, Y., Fujishima, A., & Kawai, T. (2008). Crystal-face-selective adsorption of Au nanoparticles onto polycrystalline diamond surfaces. Langmuir, 24(14), 7545-7548. https://doi.org/10.1021/la800782r