Synthesis and characterization of silica nanoparticles containing magnetic and semiconductor nanocrystals

INOR 155

Yuri Anatolievich Barnakov, ybarnako@uno.edu, Department of Chemistry, AMRI/University of New Orleans, 2000 Lakeshore dr, New Orleans, LA 70148 and Zeev Rosenzweig, zrosenzw@uno.edu, Department of Chemistry, University of New Orelans, New Orelans, LA 70148.
There have been a significant number of studies devoted to the synthesis, characterization and application of either semiconductor or magnetic nanoparticles in biological systems. There have been much fewer studies involving the synthesis, characterization and application of binary composites containing both magnetic and luminescent nanocrystals. While such particles could show clear advantages as dual contrast imaging agents their synthesis have proved to be difficult. Additionally, there is very little information about the interaction between luminescent semiconductor and magnetic nanocrystals, particularly when encapsulated in confined domains. In our laboratory we recently synthesized silica nanoparticles that contained Fe3O4 and CdSe nanocrystals. The nanoparticles were produced in toluene following well established protocols. The surface of the nanoparticles was first silanized with aminopropyltrimetoxysilane. Then Si-O dangling bonds were saturated with tetraethylortosilicate to form silica submicron sized particles containing both magnetic and semiconductor nanoparticles. The composite nanomaterials were characterized using various spectroscopic techniques and microscopies.
 

Nanoscience: Synthesis
7:00 PM-9:00 PM, Sunday, 13 March 2005 Convention Center -- Hall D, Poster

Division of Inorganic Chemistry

The 229th ACS National Meeting, in San Diego, CA, March 13-17, 2005