Anisotropic gold nanoparticles and gold plates biosynthesis using alfalfa extracts

M. O. Montes, A. Mayoral, F. L. Deepak, J. G. Parsons, M. Jose-Yacamán, J. R. Peralta-Videa, J. L. Gardea-Torresdey

Research output: Contribution to journalArticlepeer-review

62 Scopus citations


Industrial and medical applications for gold nanoparticles are extensive, yet highly dependent on their chemical and structural properties. Thus, harnessing the size and shape of nanoparticles plays an important role in nanoscience and nanotechnology. Anisotropic polyhedra and nanoplates were biosynthesized via reduction of 3 mM AuCl4 - solution at room temperature. Alfalfa biomass extracts prepared in water and in isopropanol separately were used as reducing agents at pH 3.5 and 3.0, respectively. Nanoparticles observed in the isopropanol extract presented a size range of 30-60 nm, and the morphologies present included 30 nm decahedra and 15 nm icosahedra. Gold nanoplates produced in the water extract were mainly triangular, ranging from 500 nm to 4 μm in size. The resulting nanoparticles and nanoplates can be potentially used in the study of their unique physical properties and for the mechanisms of formation using alfalfa biomass extracts.

Original languageEnglish (US)
Pages (from-to)3113-3121
Number of pages9
JournalJournal of Nanoparticle Research
Issue number8
StatePublished - Aug 2011
Externally publishedYes


  • Alfalfa
  • Gold nanoparticles
  • Gold plates
  • Nanoparticle biosynthesis
  • SEM

ASJC Scopus subject areas

  • Bioengineering
  • General Chemistry
  • Atomic and Molecular Physics, and Optics
  • Modeling and Simulation
  • General Materials Science
  • Condensed Matter Physics


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