Journal
SMALL
Volume 11, Issue 45, Pages 6036-6043Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/smll.201501829
Keywords
heme proteins; hydrogels; photonic crystals; plasmonic staining; surface enhanced Raman scattering
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Funding
- National Natural Science Foundation of China [21073033, 21373046, 21327902]
- Jiangsu Science and Technology Department [2014707]
- Suzhou Science and Technology Project [ZXG2013036]
- State Key Lab of Space Medicine Fundamentals and Application [SMFA12K11]
- Program Sponsored for Scientific Innovation Research of College Graduate in Jangsu Province [CXZZ13_0126]
- Fundamental Research Funds for the Central Universities
- Program for New Century Excellent Talents in University
- research Fund for the Doctoral Program of Higher Education of China [20120092130006]
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Plasmonic nanoparticles are commonly used as optical transducers in sensing applications. The optical signals resulting from the interaction of analytes and plamsonic nanoparticles are influenced by surrounding physical structures where the nanoparticles are located. This paper proposes inverse opal photonic crystal hydrogel as 3D structure to improve Raman signals from plasmonic staining. By hybridization of the plasmonic nanoparticles and photonic crystal, surface-enhanced Raman spectroscopy (SERS) analysis of multiplexed protein is realized. It benefits the Raman analysis by providing high-density hot spots in 3D and extra enhancement of local electromagnetic field at the band edge of PhC with periodic refractive index distribution. The strong interaction of light and the hybrid 3D nanostructure offers new insights into plasmonic nanoparticle applications and biosensor design.
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