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Stability, size and optical properties of colloidal silver nanoparticles prepared by electrical arc discharge in water

Ashkarran, A. A ; Sharif University of Technology | 2009

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  1. Type of Document: Article
  2. DOI: 10.1051/epjap/2009113
  3. Publisher: 2009
  4. Abstract:
  5. We have fabricated and characterised colloidal silver nanoparticles by the electrical arc discharge method in DI water. Size and optical properties of the silver nanoparticles were studied versus different arc currents. Optical absorption indicates a plasmonic peak at 392 nm for 10 A which increases to 398 nm for 20 A arc current. This reveals that by raising the arc current the size of the nanoparticles increases. Optical absorption of silver nanoparticles after 3 weeks shows precipitation of them in a water medium. The effect of different surfactant and stabilizer concentrations such as cethyl trimethylammonium bromide (CTAB), polyvinyl pyrrolidone (PVP), sodium citrate, sodium dodecyl sulfate (SDS), sodium di-2-ethylsulfosuccinate (AOT) and carboxymethyl cellulose (CMC) on the stability of silver nanoparticles was investigated. The colloidal silver nanoparticles with 100 μM concentration were stable for more than 3 months at 50 μM CTAB and 6 months at 10 μM sodium citrate concentration, respectively. SEM images of the sample prepared at 50 μM CTAB concentration reveal uniform and fine nanoparticles. The mean size from TEM images is about 14 nm. TEM images of the sample prepared at 10 μM sodium citrate concentration show a shell of citrate that covers the silver nanoparticles. © 2009 EDP Sciences
  6. Keywords:
  7. Arc current ; Carboxymethyl cellulose ; Colloidal silver nanoparticle ; Electrical arc ; Mean size ; Optical absorption ; Polyvinyl pyrrolidone ; SEM image ; Silver nanoparticles ; Sodium citrate ; Sodium dodecyl sulfate ; Stabilizer concentration ; TEM images ; Cavity resonators ; Concentration (process) ; Diffusers (optical) ; Electric arcs ; Electric properties ; Light absorption ; Light transmission ; Nanoparticles ; Optical properties ; Precipitation (chemical) ; Sodium ; Sodium sulfate ; Surface active agents ; Water absorption ; Silver
  8. Source: EPJ Applied Physics ; Volume 48, Issue 1 , 2009 , Pages 10601p1-10601p7 ; 12860042 (ISSN)
  9. URL: https://www.epjap.org/articles/epjap/abs/2009/10/ap08403/ap08403.html