Chemical synthesis of curved magnetic nanostructures

A. K. Srivastava, S. Madhavi, R. V. Ramanujan

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

Colloidal crystal templated assembly combined with chemical synthesis technique was used to synthesize curved magnetic nanostructures (cobalt nanobowls). Borohydride reduction of cobalt salt within the interstitials of colloidal templates of polystyrene (PS) spheres followed by annealing resulted in periodic metallic cobalt nanobowl arrays with minimal volume shrinkage. The effect of annealing temperature and atmosphere was found to be important to obtain metallic cobalt. Structural analysis was carried out to investigate the two phase (h.c.p and f.c.c) microstructure of the cobalt nanobowls. Coercivity of these cobalt nanobowls was found to be greater than their nanoparticles or thin film counterparts. Size effect on coercivity value of cobalt nanobowls was also observed.

Original languageEnglish
Title of host publicationProceedings of the Euro International Powder Metallurgy Congress and Exhibition, Euro PM 2009
PublisherEuropean Powder Metallurgy Association (EPMA)
ISBN (Print)9781899072088
Publication statusPublished - 2009
Externally publishedYes
EventEuropean International Powder Metallurgy Congress and Exhibition, Euro PM 2009 - Copenhagen, Denmark
Duration: Oct 12 2009Oct 14 2009

Publication series

NameProceedings of the Euro International Powder Metallurgy Congress and Exhibition, Euro PM 2009
Volume2

Conference

ConferenceEuropean International Powder Metallurgy Congress and Exhibition, Euro PM 2009
Country/TerritoryDenmark
CityCopenhagen
Period10/12/0910/14/09

ASJC Scopus Subject Areas

  • Mechanics of Materials
  • Ceramics and Composites
  • Materials Chemistry
  • Metals and Alloys
  • Condensed Matter Physics

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