Dispersion of SiO2-based nanocomposites with high performance liquid chromatography

Jun Wang, William B. White, James Hansell Adair

Research output: Contribution to journalArticle

13 Citations (Scopus)

Abstract

Core-shell structured Ag/SiO2 nanocomposite has been synthesized by a cyclohexane/Igepal/water reverse micelle system. The spherical nanocomposite particles were washed and concentrated with high performance liquid chromatography (HPLC) to remove the surfactant added during synthesis. Spherical SiO2 micrometer-scale particles were packed in the HPLC column as a stationary phase for the washing and dispersing of Ag/SiO 2 nanocomposite particles. Surface modification of Ag/SiO2 nanocomposite particles and SiO2 microspheres with silane coupling agent enhanced the surface charge of the particles and improved the efficiency of washing with HPLC. Well-dispersed Ag/SiO2 stable suspensions were successfully attained in ethanol/ water mixed solvents after HPLC washing. The state of dispersion for the Ag/SiO2 nanocomposite suspension was systematically assessed using dynamic light scattering (DLS) and transmission electron microscope (TEM) and spin coat/atomic force microscope (AFM) analyses. The mechanism of the enabling HPLC washing protocol for SiO2-based nanoparticles is discussed.

Original languageEnglish (US)
Pages (from-to)4679-4685
Number of pages7
JournalJournal of Physical Chemistry B
Volume110
Issue number10
DOIs
StatePublished - Mar 16 2006

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liquid chromatography
High performance liquid chromatography
washing
Nanocomposites
nanocomposites
Washing
Suspensions
Silanes
Water
light transmission
Coupling agents
dispersing
Micelles
Dynamic light scattering
Surface charge
Cyclohexane
Light transmission
Microspheres
Surface-Active Agents
silanes

All Science Journal Classification (ASJC) codes

  • Physical and Theoretical Chemistry
  • Surfaces, Coatings and Films
  • Materials Chemistry

Cite this

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Dispersion of SiO2-based nanocomposites with high performance liquid chromatography. / Wang, Jun; White, William B.; Adair, James Hansell.

In: Journal of Physical Chemistry B, Vol. 110, No. 10, 16.03.2006, p. 4679-4685.

Research output: Contribution to journalArticle

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AB - Core-shell structured Ag/SiO2 nanocomposite has been synthesized by a cyclohexane/Igepal/water reverse micelle system. The spherical nanocomposite particles were washed and concentrated with high performance liquid chromatography (HPLC) to remove the surfactant added during synthesis. Spherical SiO2 micrometer-scale particles were packed in the HPLC column as a stationary phase for the washing and dispersing of Ag/SiO 2 nanocomposite particles. Surface modification of Ag/SiO2 nanocomposite particles and SiO2 microspheres with silane coupling agent enhanced the surface charge of the particles and improved the efficiency of washing with HPLC. Well-dispersed Ag/SiO2 stable suspensions were successfully attained in ethanol/ water mixed solvents after HPLC washing. The state of dispersion for the Ag/SiO2 nanocomposite suspension was systematically assessed using dynamic light scattering (DLS) and transmission electron microscope (TEM) and spin coat/atomic force microscope (AFM) analyses. The mechanism of the enabling HPLC washing protocol for SiO2-based nanoparticles is discussed.

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