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Electrodeposition of Rhenium and Nickel Nanoparticles

Ataee, Hamed | 2009

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  1. Type of Document: M.Sc. Thesis
  2. Language: Farsi
  3. Document No: 39063 (07)
  4. University: Sharif University of Technology
  5. Department: Materials Science and Engineering
  6. Advisor(s): Sadrnezhad, Khatiboleslam
  7. Abstract:
  8. In the last decade, a great deal of attention has been paid to the study of synthesis of Nanoparticles, because of the widespread use of this material in applications involving Fuel cells and magnetic devices. In this thesis, we report some interesting features in the electrodeposition of metallic nanoparticles. The electrochemical phase formation of rhenium and nickel on the surface of P-Si (100) substrate plus morphological, topographical and fractal aspects of the accumulated surface were investigated in this research by means of chronoamperometry method and by utilization of AFM and SEM. The nucleation and growth mechanisms on silicon electrode are characterized using cyclic voltammetry and chronoamperometry. The theoretical nucleation and growth model proposed by Palomar-Pardave et al was used in this study. This work employs a vividly unique experimental method utilizing fractal analysis as an in-situ inspection of the layer accumulation during the electrodeposition process. In-situ fractal analysis of the crystallizing layer was successfully carried out to determine the essential time to deposit nanoparticles by adopting the method of chronoamperometry to the electrodeposition cell. Electrodeposition of Nickel nanoparticles on silicon single crystal was also analysed. Double and triple-pulsed electrodeposition was introduced in order to produce controlled size and density nanometric particles on Si (100) surface
  9. Keywords:
  10. Rhenium ; Nickel ; Electrochemical Deposition ; Nanoparticles ; Chronoamperometry

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