Separation of stabilized MOPS gold nanostars by density gradient centrifugation

Kavita Chandra, Vished Kumar, Stephanie E. Werner, Teri W. Odom*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

26 Scopus citations


This article describes the stabilization and postsynthetic separation of gold nanostars (AuNS) synthesized with a morpholine-based Good's buffer, 3-(N-morpholino)propanesulfonic acid. Resuspension of AuNS in ultrapure water improved the shape stability of the particles over 30 days. We demonstrated the sorting of nanostars via rate-zonal centrifugation through a linear sucrose gradient based on branch length and number. We determined that one round of centrifugation was sufficient for separation. Also, we improved the structural homogeneity and stability of the nanoparticles through the optimization of the storage conditions and established a robust method to sort AuNS based on size and shape.

Original languageEnglish (US)
Pages (from-to)4878-4884
Number of pages7
JournalACS Omega
Issue number8
StatePublished - Aug 31 2017

ASJC Scopus subject areas

  • Chemical Engineering(all)
  • Chemistry(all)


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