Studying the size/shape separation and optical properties of silver nanoparticles by capillary electrophoresis.
This paper describes the feasibility of employing capillary electrophoresis (CE) to separate silver particles in nanometer regimes. We have found that the addition of an anionic surfactant, sodium dodecyl sulphate (SDS), to the running electrolyte prevents coalescence of the silver particles during the process, which improves the separation performance; the concentration of SDS required for optimal silver nanoparticle separation is ca. 20 mM. By monitoring the electropherograms using a diode-array detection (DAD) system, we have also investigated the separation of suspended silver nanorods with respect to their shapes. Our results demonstrate that the combination of CE and DAD is a powerful one for the separation and characterization of various silver nanoparticles.
Liu
Fu-Ken
FK
National Nano Device Laboratory, Hsinchu 300, Taiwan. fuken@ndl.gov.tw
Ko
Fu-Hsiang
FH
Huang
Pei-Wen
PW
Wu
Chien-Hou
CH
Chu
Tieh-Chi
TC
D019075:Electrophoresis, Capillary / Q000379:methods*; D008855:Microscopy, Electron, Scanning; D036103:Nanotechnology; D010316:Particle Size; D012834:Silver / Q000737:chemistry*; D013056:Spectrophotometry, Ultraviolet; D013501:Surface-Active Agents / Q000737:chemistry
D013501:Surface-Active Agents; D012834:Silver