Fabrication of spherical diamond microshells

Jae K. Lee, Michael W. Anderson, Fraser A. Gray, Phillip John

Research output: Contribution to journalArticle

6 Citations (Scopus)

Abstract

Spherical and hollow diamond microspheres have been fabricated by plasma coating diamond layers onto sacrificial porous silica spheres with subsequent chemical etching of the matrices. The diamond coatings have controllable micron scale apertures created by the coalescence of the contiguous diamond crystallites. Subsequent capillary-enhanced etching produced hollow diamond microspheres. The diamond microshell walls contain submicron scale channels which provided a route to rapid silica etching. The wall thickness is controllable in the range of 5%-20% of the shell diameter by control of the nucleation density and plasma deposition time. The diameters of the diamond microshells lie in the range between 30 µm and 40 µm. The diamond shells have been characterized by field emission scanning electron microscopy (FESEM) and by Raman spectroscopy. © 2007 Elsevier B.V. All rights reserved.

Original languageEnglish
Pages (from-to)701-704
Number of pages4
JournalDiamond and Related Materials
Volume16
Issue number4-7 SPEC. ISS.
DOIs
Publication statusPublished - Apr 2007

Keywords

  • CVD
  • Diamond
  • Etching
  • Shells

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