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|Title:||A novel route to size and shape controlled synthesis of DMSO capped ruthenium dioxide nanoparticles|
|Abstract:||Ruthenium dioxide nanoparticles (RuO<sub>2</sub>) with an average particle size of 54-95 nm are readily synthesized from RuCl<sub>3</sub>.xH<sub>2</sub>O via the formation of ruthenium acetylacetone. The particle size of RuO<sub>2</sub> nanoparticle increases with increase in calcination time at 800 °C. The ruthenium dioxide nanoparticles have also been capped with DMSO to make them soluble in common organic solvents. These synthesized nanocrystallites have been characterized by FTIR, UV-vis, SEM-EDX, <sup>1</sup>H NMR, magnetic measurements and XRD techniques. The XRD pattern demonstrates the crystalline nature of these nanoparticles. The downfield shift of ν<sub>S=O</sub> frequency (∆ν=74 cm<sup>-1</sup>) in FTIR, as well as SEM-EDX and <sup>1</sup>H NMR spectra of the capped RuO<sub>2 </sub>nanoparticle confirm the capping with DMSO. UV-vis analysis shows that the absorption peak is blue-shifted with decrease of particle size. Magnetic measurements show that these nano oxides have nearly zero magnetic remanence, a linear response of magnetization and finally reach saturation magnetization at low external field in the range 2625-2650 Oe.|
|Appears in Collections:||IJC-A Vol.50A(01) [January 2011]|
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