CTAB-Assisted Synthesis of Size- and Shape-Controlled Gold Nanoparticles in SDS Aqueous Solution

Sook Young Moon, Takafumi Kusunose, Tohru Sekino

Research output: Contribution to journalArticlepeer-review

51 Citations (Scopus)

Abstract

Variously shaped gold nanoparticles were hydrothermally prepared by adding the cationic surfactant cethyltrimetylammonium bromide (CTAB) into the anionic surfactant sodium dodecyl sulfonate (SDS) in aqueous solution at 180°C without reducing agents and/or templates. Nanoparticle size and shape were controlled by the surfactant mixing ratio CTAB:SDS = xCTAB:(1 - xCTAB) and reaction time. Increasing CTAB concentration from x = 0.01 to x = 0.07 changes the nanoparticle shape from icosahedron to triangle or ellipse. The influence of the cationic/anionic ratio is presumably due to the differing catanionic micelle structures.

Original languageEnglish
Pages (from-to)2038-2040
Number of pages3
JournalMaterials Letters
Volume63
Issue number23
DOIs
Publication statusPublished - 2009 Sep 30

Keywords

  • Crystal Growth
  • Crystal Structure
  • Nanomaterials

ASJC Scopus subject areas

  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanical Engineering
  • Mechanics of Materials

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