Simple reductant concentration-dependent shape control of polyhedral gold nanoparticles and their plasmonic properties

Miharu Eguchi, Daisuke Mitsui, Hsin Lun Wu, Ryota Sato, Toshiharu Teranishi

Research output: Contribution to journalArticle

86 Citations (Scopus)

Abstract

We report a facile seed-mediated method for the synthesis of monodisperse polyhedral gold nanoparticles, with systematic shape evolution from octahedral to trisoctahedral structures. The control over the particle growth process was achieved simply by changing the concentration of the reductant in the growth solution, in the presence of small spherical seed nanoparticles. By progressively increasing the concentration of the reductant used in the growth solution (ascorbic acid), while keeping the amount and type of added surfactant constant, the morphology of the gold nanoparticles was varied from octahedral to truncated octahedral, cuboctahedral, truncated cubic, cubic, and finally trisoctahedral structures. These nanoparticles were monodisperse in size, possessed similar volumes, and were naturally oriented so that their larger crystal planes were face down on quartz substrates when deposited from the solution. By adjusting the volume of gold seed nanoparticle solution added to a growth solution, the size of the simplest gold nanoparticles (with a highly symmetric cubic morphology) could be tuned from 50 ± 2.1 to 112 ± 11 nm. When other seed nanoparticles were used, the size of the cubic Au nanoparticles reached 169 ± 7.0 nm. The nanoparticle growth mechanism and the plasmonic properties of the resulting polyhedral nanoparticles are discussed in this paper.

Original languageEnglish
Pages (from-to)9021-9026
Number of pages6
JournalLangmuir
Volume28
Issue number24
DOIs
Publication statusPublished - 2012 Jun 19

Fingerprint

shape control
Reducing Agents
Gold
gold
Nanoparticles
nanoparticles
Seed
seeds
Quartz
ascorbic acid
Ascorbic acid
Surface-Active Agents
Ascorbic Acid
Surface active agents
quartz
adjusting
surfactants

All Science Journal Classification (ASJC) codes

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

Cite this

Eguchi, Miharu ; Mitsui, Daisuke ; Wu, Hsin Lun ; Sato, Ryota ; Teranishi, Toshiharu. / Simple reductant concentration-dependent shape control of polyhedral gold nanoparticles and their plasmonic properties. In: Langmuir. 2012 ; Vol. 28, No. 24. pp. 9021-9026.
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Simple reductant concentration-dependent shape control of polyhedral gold nanoparticles and their plasmonic properties. / Eguchi, Miharu; Mitsui, Daisuke; Wu, Hsin Lun; Sato, Ryota; Teranishi, Toshiharu.

In: Langmuir, Vol. 28, No. 24, 19.06.2012, p. 9021-9026.

Research output: Contribution to journalArticle

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