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231224s2012 xx |||||o 00| ||eng c |
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|a 10.1021/la3005536
|2 doi
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|a pubmed24n0723.xml
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|a (NLM)22506587
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|a DE-627
|b ger
|c DE-627
|e rakwb
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|a eng
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1 |
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|a Uzayisenga, Viviane
|e verfasserin
|4 aut
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| 245 |
1 |
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|a Synthesis, characterization, and 3D-FDTD simulation of AgSiO2 nanoparticles for shell-isolated nanoparticle-enhanced Raman spectroscopy
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|c 2012
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|a Text
|b txt
|2 rdacontent
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|a ƒaComputermedien
|b c
|2 rdamedia
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|a ƒa Online-Ressource
|b cr
|2 rdacarrier
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|a Date Completed 23.10.2012
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|a Date Revised 19.06.2012
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|a published: Print-Electronic
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|a Citation Status PubMed-not-MEDLINE
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|a Au-seed Ag-growth nanoparticles of controllable diameter (50-100 nm), and having an ultrathin SiO(2) 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 SiO(2) 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 SiO(2) shell serves to isolate the Raman-signal enhancing core and prevent it from interfering with the system under study. The SiO(2) 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
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|a Journal Article
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1 |
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|a Lin, Xiao-Dong
|e verfasserin
|4 aut
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| 700 |
1 |
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|a Li, Li-Mei
|e verfasserin
|4 aut
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| 700 |
1 |
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|a Anema, Jason R
|e verfasserin
|4 aut
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| 700 |
1 |
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|a Yang, Zhi-Lin
|e verfasserin
|4 aut
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| 700 |
1 |
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|a Huang, Yi-Fan
|e verfasserin
|4 aut
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| 700 |
1 |
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|a Lin, Hai-Xin
|e verfasserin
|4 aut
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| 700 |
1 |
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|a Li, Song-Bo
|e verfasserin
|4 aut
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| 700 |
1 |
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|a Li, Jian-Feng
|e verfasserin
|4 aut
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| 700 |
1 |
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|a Tian, Zhong-Qun
|e verfasserin
|4 aut
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| 773 |
0 |
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|i Enthalten in
|t Langmuir : the ACS journal of surfaces and colloids
|d 1992
|g 28(2012), 24 vom: 19. Juni, Seite 9140-6
|w (DE-627)NLM098181009
|x 1520-5827
|7 nnns
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| 773 |
1 |
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|g volume:28
|g year:2012
|g number:24
|g day:19
|g month:06
|g pages:9140-6
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|u http://dx.doi.org/10.1021/la3005536
|3 Volltext
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