title: Flow field-flow fractionation: a versatile approach for size characterization of alpha-tocopherol-induced enlargement of gold nanoparticles.
abstract: Flow field-flow fractionation (FlFFF) was used for size characterization of gold nanoparticles. The measured particle sizes obtained from FlFFF for the commercial 10 nm gold nanoparticle standard and the gold nanoparticles synthesized in the laboratory were in good agreement with those measured by transmission electron microscopy (TEM). Further, the capability of alpha-tocopherol to induce enlargement of gold nanoparticles by catalysis of the reduction of AuCl(4)(-) by citrate was observed by monitoring the changes in particle size of gold nanoparticles using FlFFF. The effects of alpha-tocopherol and incubation time on enlargement of the gold nanoparticles were examined. Higher concentrations of alpha-tocopherol resulted in larger nanoparticles. At fixed alpha-tocopherol concentration, larger nanoparticles were formed at longer incubation times.
authors.affiliation: Department of Chemistry and Center for Innovation in Chemistry, Faculty of Science, Mahidol University, Rama VI Road, Bangkok 10400, Thailand.
authors.forename: Wimut
authors.initials: W
authors.lastname: Sermsri
authors.forename: Purim
authors.initials: P
authors.lastname: Jarujamrus
authors.forename: Juwadee
authors.initials: J
authors.lastname: Shiowatana
authors.forename: Atitaya
authors.initials: A
authors.lastname: Siripinyanond
mesh_terms: D002384:Catalysis; D031521:Fractionation, Field Flow / Q000295:instrumentation / Q000379:methods*; D006046:Gold / Q000737:chemistry*; D053768:Metal Nanoparticles / Q000737:chemistry* / Q000648:ultrastructure; D046529:Microscopy, Electron, Transmission; D010316:Particle Size; D024502:alpha-Tocopherol / Q000737:chemistry*
chemical_list: D006046:Gold; D024502:alpha-Tocopherol