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Rapid and efficient synthesis of colloidal gold nanoparticles by arc discharge method

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

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  1. Type of Document: Article
  2. DOI: 10.1007/s00339-009-5288-x
  3. Publisher: 2009
  4. Abstract:
  5. We report a simple, inexpensive and one-step synthesis route of colloidal gold nanoparticles using arc discharge between titanium electrodes in HAuCl 4 solution achieving long-time stability. Gold nanoparticles of 8 nm diameter were formed during reduction of HAuCl4 in the plasma discharge zone. The resulting nanoparticles were characterized using UV-Vis spectroscopy, scanning electron microscopy (SEM) and transmission electron microscopy (TEM). Optical absorption spectroscopy of as prepared samples at 15 A arc current in HAuCl4 solution shows a surface plasmon resonance around 550 nm. It was found that sodium citrate acts as a stabilizer and surface capping agent of the colloidal nanoparticles. SEM images exhibit the increase of reduced nanoparticles in 4 minutes arc duration compared with 1 minute arc duration. A TEM image of the sample prepared at 4 minutes arc duration shows a narrow size distribution with 8 nm mean particle size. The plasmonic peak intensity of as prepared gold nanoparticles in 1 minute arc duration gradually increases due to seed mediation up to 6 hours. © 2009 Springer-Verlag
  6. Keywords:
  7. Arc current ; Arc discharge ; Arc duration ; Arc-discharge method ; Colloidal gold nanoparticles ; Colloidal nanoparticles ; Efficient synthesis ; Gold Nanoparticles ; Mean particle size ; Narrow size distributions ; One step synthesis ; Optical absorption spectroscopy ; Peak intensity ; Plasma discharge ; SEM ; SEM image ; Sodium citrate ; Surface capping ; TEM ; TEM images ; Time stability ; Titanium electrodes ; UV-vis spectroscopy ; Cavity resonators ; Electric discharges ; Gold ; Nanoparticles ; Plasmas ; Plasmons ; Scanning electron microscopy ; Sodium ; Surface plasmon resonance ; Titanium ; Transmission electron microscopy ; Ultraviolet spectroscopy ; Absorption spectroscopy
  8. Source: Applied Physics A: Materials Science and Processing ; Volume 96, Issue 2 , 2009 , Pages 423-428 ; 09478396 (ISSN)
  9. URL: https://link.springer.com/article/10.1007/s00339-009-5288-x