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Quadrupole-Enhanced Raman Scattering

Title
Quadrupole-Enhanced Raman Scattering
Authors
Hastings, Simon P.Swanglap, PattanawitQian, ZhaoxiaFang, YingPark, So-JungLink, StephanEngheta, NaderFakhraai, Zahra
Ewha Authors
박소정
SCOPUS Author ID
박소정scopus
Issue Date
2014
Journal Title
ACS NANO
ISSN
1936-0851JCR Link1936-086XJCR Link
Citation
vol. 8, no. 9, pp. 9025 - 9034
Keywords
SERSspiky nanoshellsQERSquadrupole resonanceplasmon resonanceRaman spectroscopy
Publisher
AMER CHEMICAL SOC
Indexed
SCI; SCIE; SCOPUS WOS
Abstract
Dark, nonradiating plasmonic modes are important in the Raman enhancement efficiency of nanostructures. However, it is challenging to engineer such hotspots with predictable enhancement efficiency through synthesis routes. Here, we demonstrate that spiky nanoshells have designable quadrupole resonances that efficiently enhance Raman scattering with unprecedented reproducibility on the single particle level. The efficiency and reproducibility of Quadrupole Enhanced Raman Scattering (QERS) is due to their heterogeneous structure, which broadens the quadrupole resonance both spatially and spectrally. This spectral breadth allows for simultaneous enhancement of both the excitation and Stokes frequencies. The quadrupole resonance can be tuned by simple modifications of the nanoshell geometry. The combination of tunability, high efficiency, and reproducibility makes these nanoshells an excellent candidate for applications such as biosensing, nanoantennaes, and photovoltaics.
DOI
10.1021/nn5022346
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자연과학대학 > 화학·나노과학전공 > Journal papers
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