Ordered mesoporous silica nanoparticles with and without embedded iron oxide nanoparticles: Structure evolution during synthesis Journal Article
| Authors: | Suteewong, T.; Sai, H.; Lee, J.; Bradbury, M.; Hyeon, T.; Gruner, S. M.; Wiesner, U. |
| Article Title: | Ordered mesoporous silica nanoparticles with and without embedded iron oxide nanoparticles: Structure evolution during synthesis |
| Abstract: | This work reports on the structural evolution during room temperature synthesis of hexagonally ordered mesoporous silica nanoparticles with and without embedded iron oxide particles. Oleic acid-capped iron oxide nanoparticles are synthesized and transferred to an aqueous phase using the cationic surfactant, hexadecyltrimethylammonium bromide (CTAB). MCM-41 type silica and composite nanoparticles are fabricated via sol-gel synthesis. Aliquots are taken from the solution during synthesis to capture the particle formation process. Transmission Electron Microscopy (TEM) and Small Angle X-ray Scattering (SAXS) reveal a transition from a disordered to an ordered structure in both synthesis systems. Along with the evolution of structure, iron oxide nanoparticles acting as seeds at the early stages are relocated from the particle centers to the edges. Nitrogen sorption measurements for iron oxide-embedded mesoporous nanoparticles indicate surface areas as high as for the mesoporous silica nanoparticles without iron oxide. © 2010 The Royal Society of Chemistry. |
| Keywords: | biology; nanoparticles; silica; iron oxide nanoparticle; iron oxides; mesoporous silica nanoparticles; room temperature synthesis; mesoporous materials; transmission electron microscopy; aqueous phase; composite nanoparticles; hexadecyltrimethylammonium bromide; iron oxide particles; mesoporous nanoparticle; nitrogen sorption; ordered mesoporous silicas; ordered structures; particle formation process; small angle x-ray scattering; sol-gel synthesis; structural evolution; structure evolution; surface area; tem; bromine compounds; cationic surfactants; dyes; oleic acid; sorption |
| Journal Title: | Journal of Materials Chemistry |
| Volume: | 20 |
| Issue: | 36 |
| ISSN: | 0959-9428 |
| Publisher: | Royal Society of Chemistry |
| Date Published: | 2010-09-28 |
| Start Page: | 7807 |
| End Page: | 7814 |
| Language: | English |
| DOI: | 10.1039/c0jm01002b |
| PROVIDER: | scopus |
| DOI/URL: | |
| Notes: | --- - "Cited By (since 1996): 1" - "Export Date: 20 April 2011" - "CODEN: JMACE" - "Source: Scopus" |
