Highly monodisperse cubic and octahedral rhodium nanocrystals

Their evolutions from sharp polyhedrons into branched nanostructures and surface-enhanced Raman scattering

Nguyen Viet Long, Nguyen Duc Chien, Hirohito Hirata, Takashi Matsubara, Michitaka Ohtaki, Masayuki Nogami

研究成果: ジャーナルへの寄稿記事

14 引用 (Scopus)

抄録

We report the preparation of poly(vinylpyrrolidone) (PVP)-protected Rh nanoparticles by modified polyol method with the reduction of RhCl3 in ethylene glycol at 160 °C using AgNO3. This method is used to synthesize highly cubic and octahedral Rh nanoparticles with their well-controlled size ∼714 nm characterized by transmission electron microscopy (TEM). At a low AgNO3 concentration, the appearance of the sharply good morphology of Rh nanoparticles due to their controlled growth of {1 0 0} and {1 1 1} selective surfaces for ∼1015 min is observed. Their morphology between cubic and octahedral shape exhibits their competitive growth along the [1 1 1] and [1 0 0] directions. Interestingly, sharply and highly branched Rh nanoparticles with their shapes of very sharp corners or sharp-tip arms growing in the [1 1 1] directions are synthesized for ∼30 min at the same concentration of RhCl3 and AgNO3 precursors. However, at a higher concentration of AgNO3, the assemblies of Rh multipods leading to large porous Rh nanoparticles are observed. The problems of reaction time and temperature are discussed to clarify the nucleation and growth of Rh nanoparticles. In addition, monolayers of Rh nanoparticles on SERS substrates using a probe as malachite green (MG) molecule exhibit the high sensitivity for their potential applications in chemical and biochemical sensing.

元の言語英語
ページ(範囲)78-89
ページ数12
ジャーナルJournal of Crystal Growth
320
発行部数1
DOI
出版物ステータス出版済み - 4 1 2011
外部発表Yes

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Rhodium
polyhedrons
rhodium
Nanocrystals
Raman scattering
Nanostructures
nanocrystals
Raman spectra
Nanoparticles
nanoparticles
selective surfaces
Ethylene Glycol
Polyols
Ethylene glycol
reaction time
assemblies
glycols
low concentrations
Monolayers
Nucleation

All Science Journal Classification (ASJC) codes

  • Condensed Matter Physics
  • Inorganic Chemistry
  • Materials Chemistry

これを引用

Highly monodisperse cubic and octahedral rhodium nanocrystals : Their evolutions from sharp polyhedrons into branched nanostructures and surface-enhanced Raman scattering. / Long, Nguyen Viet; Chien, Nguyen Duc; Hirata, Hirohito; Matsubara, Takashi; Ohtaki, Michitaka; Nogami, Masayuki.

:: Journal of Crystal Growth, 巻 320, 番号 1, 01.04.2011, p. 78-89.

研究成果: ジャーナルへの寄稿記事

Long, Nguyen Viet ; Chien, Nguyen Duc ; Hirata, Hirohito ; Matsubara, Takashi ; Ohtaki, Michitaka ; Nogami, Masayuki. / Highly monodisperse cubic and octahedral rhodium nanocrystals : Their evolutions from sharp polyhedrons into branched nanostructures and surface-enhanced Raman scattering. :: Journal of Crystal Growth. 2011 ; 巻 320, 番号 1. pp. 78-89.
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AU - Ohtaki, Michitaka

AU - Nogami, Masayuki

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