title: Synthesis and characterization of radioisotope nanospheres containing two gamma emitters.
abstract: Silica-coated gold-silver alloy nanospheres prepared by Stöber's method were irradiated in a nuclear reactor to prepare radioisotope nanospheres for use as radiotracers. The radioisotope nanospheres included two gamma nuclides: (i) Au-198, emitting major photons with 0.412 MeV and (ii) Ag-108, emitting photons with 0.434 and 0.633 MeV. The nanospheres shell and core diameters were 100-112 nm and 20-50 nm, respectively, depending on their preparation. The gamma-emitting nanospheres could be used as tracers in high-temperature petrochemical and refinery processes in which conventional organic radioactive labels will decompose.
authors.affiliation: Department of Chemistry, Hannam University, Daejeon, Republic of Korea.
authors.forename: Jin-Hyuck
authors.initials: JH
authors.lastname: Jung
authors.forename: Sung-Hee
authors.initials: SH
authors.lastname: Jung
authors.forename: Sang-Ho
authors.initials: SH
authors.lastname: Kim
authors.forename: Seong-Ho
authors.initials: SH
authors.lastname: Choi