Takdanai Techarang and Atitaya Siripinyanond*

Electrical field-flow fractionation (ElFFF) and SP-ICP-MS techniques were applied for nanoparticle characterization. ElFFF provides information on hydrodynamic diameter of nanoparticles, whereas SP-ICP-MS provides information on core diameter of nanoparticles. The combined use of ElFFF and SP-ICP-MS provides information on electrophoretic mobility of nanoparticles. In addition, the information of core diameter from SP-ICP-MS and hydrodynamic diameter from ElFFF, associated with electrophoretic mobility, was applied for characterization of layer thickness of stabilizing agent coated on nanoparticle surface of 60 nm AgNPs stabilized by PEG which the result shows agreement with the values from certificate and Zetasizer.

Thanks are due to the National Research Council of Thailand (NRCT) and Mahidol University under grant number N41A640159. The support given to TT from the Thailand Research Fund (TRF) through the Royal Golden Jubilee (RGJ) Ph.D. Program (Grant No. PHD/0110/2557) and the support from Center of Excellence for Innovation in Chemistry (PERCH-CIC) and National Research Council of Thailand (N11A650144) are gratefully acknowledged.