Silver nanoparticles of variable morphology synthesized in aqueous foams as novel templates

Saikat Manual, Sujatha K. Arumugam, Renu Pasricha, Murali Sastry

Research output: Contribution to journalArticle

Abstract

In this paper, we describe the synthesis of silver nanocrystals within aqueous foams as a template. More specifically, we show that aqueous Ag + ions may be electrostatically complexed with the anionic surfactants aerosol OT (sodium bis-2-ethylhexyl-sulfosuccinate, (AOT) and sodium dodecyl sulphate (SDS)) in a highly stable liquid foam. After drainage of the foam, the silver ions are reduced in situ by introducing sodium borohydride into the foam by capillary flow. This leads to the formation of silver nanoparticles of spherical, tape- and sheet-like morphology in the foam. The structure of the foam is extremely complex and presents reaction sites of different spatial extent. The differences in foam reaction-site geometry are believed to be responsible for the morphology variation in the silver nanoparticles observed. The silver nanoparticles are observed to be extremely stable in solution suggesting that the AOT or SDS molecules stabilize them. This approach appears promising for application in large-scale synthesis of nanoparticles and may be readily extended to other chemical compositions.

Original languageEnglish (US)
Pages (from-to)503-510
Number of pages8
JournalBulletin of Materials Science
Volume28
Issue number5
StatePublished - Aug 1 2005

Fingerprint

Silver
Foams
Nanoparticles
Dioctyl Sulfosuccinic Acid
Sodium dodecyl sulfate
Sodium Dodecyl Sulfate
Sodium
Ions
Capillary flow
Anionic surfactants
Nanocrystals
Tapes
Drainage
Aerosols
Molecules
Geometry
Liquids
Chemical analysis

Keywords

  • Chemical synthesis
  • Composites
  • Foam
  • Intercalation
  • Nanoparticles

ASJC Scopus subject areas

  • Materials Science(all)
  • Mechanics of Materials

Cite this

Silver nanoparticles of variable morphology synthesized in aqueous foams as novel templates. / Manual, Saikat; Arumugam, Sujatha K.; Pasricha, Renu; Sastry, Murali.

In: Bulletin of Materials Science, Vol. 28, No. 5, 01.08.2005, p. 503-510.

Research output: Contribution to journalArticle

Manual, Saikat ; Arumugam, Sujatha K. ; Pasricha, Renu ; Sastry, Murali. / Silver nanoparticles of variable morphology synthesized in aqueous foams as novel templates. In: Bulletin of Materials Science. 2005 ; Vol. 28, No. 5. pp. 503-510.
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