Transition metal-chelating surfactant micelle templates for facile synthesis of mesoporous silica nanoparticles

Hye Sun Lee, Won Hee Kim, Jin Hyung Lee, Doo Jin Choi, Young Keun Jeong, Jeong Ho Chang

Research output: Contribution to journalArticle

12 Citations (Scopus)

Abstract

Highly ordered mesoporous silica nanoparticles with tunable morphology and pore-size are prepared by the use of a transition metal-chelating surfactant micelle complex using Co 2, Ni 2, Cu 2, and Zn 2 ions. These metal ions formed a metal-P123 micelle complex in an aqueous solution, while the metal ions are chelated to the hydrophilic domain such as the poly(ethylene oxide) group of a P123 surfactant. The different complexation abilities of the utilized transition metal ions play an important role in determining the formation of nano-sized ordered MSNs due to the different stabilization constant of the metal-P123 complex. Consequently, from a particle length of 1700 nm in the original mesoporous silica materials, the particle length of ordered MSNs through the metal-chelating P123 micelle templates can be reduced to a range of 180800 nm. Furthermore, the variation of pore size shows a slight change from 8.8 to 6.6 nm. In particular, the Cu 2-chelated MSNs show only decreased particle size to 180 nm. The stability constants for the metal-P123 complex are calculated on the basis of molar conductance measurements in order to elucidate the formation mechanism of MSNs by the metal-chelating P123 complex templates. In addition, solid-state 29Si, 13C-NMR and ICP-OES measurements are used for quantitative characterization reveal that the utilized metal ions affect only the formation of a metal-P123 complex in a micelle as a template.

Original languageEnglish
Pages (from-to)89-94
Number of pages6
JournalJournal of Solid State Chemistry
Volume185
DOIs
Publication statusPublished - 2012 Jan

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Ceramics and Composites
  • Condensed Matter Physics
  • Physical and Theoretical Chemistry
  • Inorganic Chemistry
  • Materials Chemistry

Fingerprint Dive into the research topics of 'Transition metal-chelating surfactant micelle templates for facile synthesis of mesoporous silica nanoparticles'. Together they form a unique fingerprint.

  • Cite this