Nano Science and Technology Institute
Nanotech 2013 Vol. 1
Nanotech 2013 Vol. 1
Nanotechnology 2013: Advanced Materials, CNTs, Particles, Films and Composites (Volume 1)
 
Chapter 4: Nanoparticle Synthesis & Applications
 

Synthesis method for well crystallized alloy nanoparticles in aqueous solution under room temperature by controlling the metal complexes condition

Authors:H. Takahashi, T. Mabuchi, S. Yokoyama, K. Tohji
Affilation:Tohoku University, JP
Pages:337 - 340
Keywords:well crystallized, uniform, alloy nanoparticles, complexes condition
Abstract:In the case of usual nanoparticles synthesis method, the as-prepared metallic nanoparticles often exhibited inhomogeneous compositions and multi-crystalline structures, which does not adequate for the industrial applications. Therefore, in this study, to develop the synthesis method for “uniform” and “well-crystallized” alloy nanoparticles, relation between the structure of metal complexes in the aqueous solution and reduction mechanism of these alloy nanoparticles were evaluated. Metal complex conditions in an aqueous solution were expected by the calculation using the critical stability constants. Results of the prediction clearly demonstrated that only the [Pd-EDTA] complex was generated independently in the solution with the pH range of 5 to 10. Therefore, conditions of complexes in solution (pH8) were evaluated by Electro Spray Ionization Time of Fright Mass Spectroscopy (ESI-TOF-MS) and also Extended X-ray Absorption Fine Structure (EXAFS). These results clearly demonstrated that formation of one specific metal complex [Pd-EDTA] in the solution was achieved. By the reduction of these controlled mixed solution, only uniform and well crystallized Pd20Te7 was successfully synthesized, since the formations of metal complexes are restricted to [Pd-EDTA]and [Te-citric acid], respectively.
ISBN:978-1-4822-0581-7
Pages:830
Hardcopy:$209.95
 
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