Copper oxide nanorods assembly and their whisker transformation at liquid-liquid interface and on solid surfaces

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We report on real time fluctuations and chain-like assemblies of copper oxide (CuO) nanorods at the liquid-liquid interface. The rods were found to transform into whiskers and 3D structures upon spin-casting on silicon substrates. The results of atmospheric scanning electron microscope (ASEM) and atomic force microscopy (AFM) provide compelling evidence that both the transformation and the assembly are driven by interaction between the π electrons of toluene and CuO nanorods, and to a smaller extent by breath figure dynamics rather than the solution-liquid-solid mechanism that was previously believed to account for whisker formation. These results open up a way for studying and understanding the dynamics of nanoparticles at liquid-liquid interfaces.

Original languageEnglish
Pages (from-to)41-48
Number of pages8
JournalJournal of Crystal Growth
Publication statusPublished - Apr 15 2014



  • A1. Assembly
  • A1. Dynamics
  • A1. Interface
  • A1. Nanorod
  • A1. Whisker
  • B1. Copper oxide

ASJC Scopus subject areas

  • Condensed Matter Physics
  • Materials Chemistry
  • Inorganic Chemistry

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