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dc.contributor.authorUzayisenga, Viviane
dc.contributor.authorLin, Xiao-Dong
dc.contributor.authorLi, Li-Mei
dc.contributor.authorAnema, Jason R.
dc.contributor.authorYang, Zhi-Lin
dc.contributor.author杨志林
dc.contributor.authorHuang, Yi-Fan
dc.contributor.authorLin, Hai-Xin
dc.contributor.authorLi, Song-Bo
dc.contributor.authorLi, Jian-Feng
dc.contributor.authorTian, Zhong-Qun
dc.contributor.author田中群
dc.date.accessioned2013-03-21T07:33:08Z
dc.date.available2013-03-21T07:33:08Z
dc.date.issued2012-06-19
dc.identifier.citationLANGMUIR,2012,28(24):9140-9146zh_CN
dc.identifier.issn0743-7463
dc.identifier.urihttp://dx.doi.org/10.1021/la3005536
dc.identifier.uriWOS:000305320700040
dc.identifier.urihttps://dspace.xmu.edu.cn/handle/2288/15249
dc.description.abstractAu-seed Ag-growth nanoparticles of controllable diameter (50-100 nm), and having an ultrathin SiO2 shell of controllable thickness (2-3 nm), were prepared for shell-isolated nanoparticle-enhanced Raman spectroscopy (SHINERS). Their morphological, optical, and material properties were characterized; and their potential for use as a versatile Raman signal amplifier was investigated experimentally using pyridine as a probe molecule and theoretically by the three-dimensional finite-difference time-domain (3D-FDTD) method. We show that a SiO2 shell as thin as 2 nm can be synthesized pinhole-free on the Ag surface of a nanoparticle, which then becomes the core. The dielectric SiO2 shell serves to isolate the Raman-signal enhancing core and prevent it from interfering with the system under study. The SiO2 shell also hinders oxidation of the Ag surface and nanoparticle aggregation. It significantly improves the stability and reproducibility of surface-enhanced Raman scattering (SERS) signal intensity, which is essential for SERS applications. Our 3D-FDTD simulations show that Ag-core SHINERS nanoparticles yield at least 2 orders of magnitude greater enhancement than Au-core ones when excited with green light on a smooth Ag surface, and thus add to the versatility of our SHINERS method.zh_CN
dc.description.sponsorshipNSF of China [21021002, 21033007]; Innovation Method Fund of China [2010IM040100]zh_CN
dc.language.isoenzh_CN
dc.publisherAMER CHEMICAL SOCzh_CN
dc.subjectSILVER NANOPARTICLESzh_CN
dc.subjectTRANSITION-METALSzh_CN
dc.subjectSURFACEzh_CN
dc.subjectSCATTERINGzh_CN
dc.subjectGOLDzh_CN
dc.subjectSHINERSzh_CN
dc.subjectNANOSTRUCTURESzh_CN
dc.subjectULTRATHINzh_CN
dc.subjectSIZEzh_CN
dc.subjectAGzh_CN
dc.titleSynthesis, Characterization, and 3D-FDTD Simulation of Ag@SiO2 Nanoparticles for Shell-Isolated Nanoparticle-Enhanced Raman Spectroscopyzh_CN
dc.typeArticlezh_CN


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