naa a22 4500 510816916 CHVBK 20180411083511.0 cr unu---uuuuu 180411e20130601xx s 000 0 eng 10.1007/s11468-013-9529-7 doi (NATIONALLICENCE)springer-10.1007/s11468-013-9529-7 Magnetic-Plasmonic FePtAg Core-Shell Nanoparticles and Their Magnetic and SERS Properties [Elektronische Daten] [Nguyen Trang, Trinh Thuy, Koichi Higashimine, Derrick Mott, Shinya Maenosono] Magnetic-plasmonic FePt@Ag core-shell nanoparticles (NPs) with different Ag shell thicknesses were successfully synthesized using a seed-mediated method. They presented not only localized surface plasmon resonance in the visible region, but also superparamagnetic behavior at room temperature. When normalized by the weight of FePt, the saturation magnetization of the FePt@Ag NPs was found to be higher than that of FePt NPs, suggesting that the Ag shell effectively passivated the FePt NP surfaces, avoiding the direct interaction between the FePt core and surface capping ligands that typically forms a magnetically dead layer in FePt NPs. Despite the high colloidal stability and the small size of the FePt@Ag NPs, the NPs were easily separated using a permanent magnet. The surface enhanced Raman scattering (SERS) activity of the FePt@Ag NPs was then examined using thiophenol as a Raman reporter molecule and was found to be equivalent to that of Ag NPs. Moreover, the SERS activity of the FePt@Ag NPs was enhanced when a magnetic field was applied during the preparation of the SERS substrate (FePt@Ag NP film). These FePt@Ag NPs hold promise as dual-functional sensing probes for environmental and diagnostic applications. Springer Science+Business Media New York, 2013 Iron-platinum nanoparticle nationallicence Silver shell nationallicence Magnetic separation nationallicence Surface enhanced Raman scattering nationallicence Trang Nguyen School of Materials Science, Japan Advanced Institute of Science and Technology (JAIST), 1-1 Asahidai, 923-1292, Nomi, Ishikawa, Japan aut Thuy Trinh School of Materials Science, Japan Advanced Institute of Science and Technology (JAIST), 1-1 Asahidai, 923-1292, Nomi, Ishikawa, Japan aut Higashimine Koichi School of Materials Science, Japan Advanced Institute of Science and Technology (JAIST), 1-1 Asahidai, 923-1292, Nomi, Ishikawa, Japan aut Mott Derrick School of Materials Science, Japan Advanced Institute of Science and Technology (JAIST), 1-1 Asahidai, 923-1292, Nomi, Ishikawa, Japan aut Maenosono Shinya School of Materials Science, Japan Advanced Institute of Science and Technology (JAIST), 1-1 Asahidai, 923-1292, Nomi, Ishikawa, Japan aut Plasmonics Springer US; http://www.springer-ny.com 8/2(2013-06-01), 1177-1184 1557-1955 8:2<1177 2013 8 11468 https://doi.org/10.1007/s11468-013-9529-7 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s11468-013-9529-7 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Trang Nguyen School of Materials Science, Japan Advanced Institute of Science and Technology (JAIST), 1-1 Asahidai, 923-1292, Nomi, Ishikawa, Japan aut NATIONALLICENCE 700 1- Thuy Trinh School of Materials Science, Japan Advanced Institute of Science and Technology (JAIST), 1-1 Asahidai, 923-1292, Nomi, Ishikawa, Japan aut NATIONALLICENCE 700 1- Higashimine Koichi School of Materials Science, Japan Advanced Institute of Science and Technology (JAIST), 1-1 Asahidai, 923-1292, Nomi, Ishikawa, Japan aut NATIONALLICENCE 700 1- Mott Derrick School of Materials Science, Japan Advanced Institute of Science and Technology (JAIST), 1-1 Asahidai, 923-1292, Nomi, Ishikawa, Japan aut NATIONALLICENCE 700 1- Maenosono Shinya School of Materials Science, Japan Advanced Institute of Science and Technology (JAIST), 1-1 Asahidai, 923-1292, Nomi, Ishikawa, Japan aut NATIONALLICENCE 773 0- Plasmonics Springer US; http://www.springer-ny.com 8/2(2013-06-01), 1177-1184 1557-1955 8:2<1177 2013 8 11468 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer