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LU ZHANG,Peihui Yang,YAN-JIE GUO,JIAN-JUN LUO,GUI-MIN SUN,ZHI-HONG LIANG,YAN-JUAN TANG 성균관대학교(자연과학캠퍼스) 성균나노과학기술원 2014 NANO Vol.9 No.3
A novel core – shell hybrid nanostructure was constructed by employing gold nanorod (AuNR)combined with rhodamine B (RB) as a core and silica as a shell. The poly(sodium 4-styr-enesulfonate) (PSS), a negatively charged polyelectrolyte, played the role of linker to electro-statically trap RB on AuNRs. Due to the °uorescence spectral overlap between RB and AuNRs at560 nm, the red °uorescence and enhanced green °uorescence of the hybrid nanostructures wereobserved obviously, which is capable for dual-color labeling. To reduce toxic side e®ects ofAuNRs, silica was coated on AuNRs as a shell to fabricate the novel core – shell hybrid nano-structure function as a dual-color labeling for cancer-cell imaging. The fabricated compositestructures were characterized by transmission electron microscopy (TEM), absorption spectrum,°uorescence spectrum, zeta potential measurements and laser scanning confocal microscope(LSCM). The experiment results con¯rmed that the obtained hybrid nanostructures providedexcellent photostability, biocompatibility and active surface for further biological functionali-zation. The novel composite structures may have great potential application in cell multicolorlabeling and imaging instead of traditional °uorescent dyes.
Eu3+/Tb3+ Co-Doped Cerium Oxide Transparent Nanocomposite for Color-Tunable Emission
Xiaoyan Li,Yunlong Yu,Xiangfeng Guan,Peihui Luo,Linqin Jiang,Zhiqiang Zheng,Dagui Chen 성균관대학교(자연과학캠퍼스) 성균나노과학기술원 2018 NANO Vol.13 No.10
Eu3+/Tb3+ co-doped nanocomposite containing CeO2 nanocrystals was successfully prepared by an in situ sol–gel polymerization approach. High-resolution transmission electron microscopy demonstrated the homogeneous precipitation of CeO2 nanocrystals among the polymethylmethacrylate (PMMA) matrix. The thermal stability and UV-shielding capability of the obtained nanocomposite were improved with increase of CeO2 content. The tuning of the emissive color from green and yellow to red can be easily achieved by varying the dopant species and concentration. These results suggested that the obtained nanocomposite could be potentially applicable in transparent solid-state luminescent devices.