Characterization of colloidal gold nanoparticles according to size by capillary zone electrophoresis

✍ Scribed by Ursula Schnabel; Christian-Herbert Fischer; Ernst Kenndler

• Publisher: John Wiley and Sons
• Year: 1997
• Tongue: English
• Weight: 78 KB
• Volume: 9
• Category: Article
• ISSN: 1040-7685
• DOI: 10.1002/(sici)1520-667x(1997)9:7<529::aid-mcs2>3.0.co;2-3

✦ Synopsis

Colloidal gold particles with core diameters between 5.2 and 14.6 nm Ž are investigated by capillary zone electrophoresis in acetic acidracetate buffer pH . 5.0 without any sieving additive. It was found that the mobility of the particles with a given core diameter decreases with decreasing ionic strength as the thickness of Ž the electric double layer increases. At the highest ionic strength investigated 6

. mmolrL a good linear dependence of the mobility on the reciprocal of the core radius allows the size-based characterization of the nanoparticles.