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Quadrupole-Enhanced Raman Scattering
- Title
- Quadrupole-Enhanced Raman Scattering
- Authors
- Hastings, Simon P.; Swanglap, Pattanawit; Qian, Zhaoxia; Fang, Ying; Park, So-Jung; Link, Stephan; Engheta, Nader; Fakhraai, Zahra
- Ewha Authors
- 박소정
- SCOPUS Author ID
- 박소정
- Issue Date
- 2014
- Journal Title
- ACS NANO
- ISSN
- 1936-0851
1936-086X
- Citation
- ACS NANO vol. 8, no. 9, pp. 9025 - 9034
- Keywords
- SERS; spiky nanoshells; QERS; quadrupole resonance; plasmon resonance; Raman spectroscopy
- Publisher
- AMER CHEMICAL SOC
- Indexed
- SCI; SCIE; SCOPUS
- Document Type
- Article
- 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
- Appears in Collections:
- 자연과학대학 > 화학·나노과학전공 > Journal papers
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