Nanoparticle ordering by dewetting of Co on SiO2

C. Favazza, J. Trice, A. K. Gangopadhyay, H. Garcia, R. Sureshkumar, Ramki Kalyanaraman

Research output: Contribution to journalArticlepeer-review

22 Scopus citations


Most metals on SiO2 have a finite contact angle and are therefore subject to dewetting during thermal processing. The resulting dewetting morphology is determined primarily by nucleation and growth or instabilities. The dewetting mechanism implies a disordered spatial arrangement for homogeneous nucleation, but an ordered one for instabilities such as spinodal decomposition. Here, we show that the morphology of laser-melted ultrathin Co film (4-nm thick) can be attributed to dewetting via an instability. Dewetting leads to breakup of the continuous Co film into nanoparticles with a monomodal size distribution with an average particle diameter of 75 nm ±23 nm. These nanoparticles have short-range order (SRO) of 130 nm in their separation. This result has important implications for nanomanufacturing with a robust spacing or size selection of nanoparticles in addition to spatial ordering.

Original languageEnglish (US)
Pages (from-to)1618-1620
Number of pages3
JournalJournal of Electronic Materials
Issue number8
StatePublished - Aug 2006
Externally publishedYes


  • Dewetting
  • Laser
  • Nanoparticles
  • Nanophotonics
  • Ordering

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Electrical and Electronic Engineering
  • Materials Chemistry


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