The gap-plasmonic effect induced on a silver nanoisland substrate for surface-enhanced Raman spectroscopy

Hyerin Song, Jong Ryul Choi, Wonju Lee, Donghyun Kim, Dongyun Lee, Kyujung Kim

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

This research is about surface-enhanced Raman spectroscopy based on the gap-plasmonic effects between the silver nanoisland (AgNI) substrate and gold nanoparticles (AuNPs). With calculation, we prove that plasmonic-coupling phenomena between AuNPs and AgNIs were formed, which eventually affect to the signal enhancements, and we simulate the field enhancement according to the AuNPs position on the AgNI substrates. Consequently, we experimentally confirm the Raman signal enhancement using target as AuNP attached DNA, which were distributed on the AgNIs substrate randomly. Raman spectra measured on the AgNI substrate exhibit approximately 20-fold signal enhancements compare to the signals measured on a uniform silver film, and the experimental spectra agreed well with the results of simulation. This method has merit in that significant Raman signal enhancements can be achieved for large areas without a complicated nano-lithographic process.

Original languageEnglish
Title of host publicationInternational Conference on Nano-Bio Sensing, Imaging, and Spectroscopy 2015, NBSIS 2015
PublisherSPIE
Volume9523
ISBN (Electronic)9781628416794
DOIs
Publication statusPublished - 2015 Jan 1
Event2nd International Conference on Nano-Bio Sensing, Imaging, and Spectroscopy, NBSIS 2015 - Jeju, Korea, Republic of
Duration: 2015 Feb 252015 Feb 27

Other

Other2nd International Conference on Nano-Bio Sensing, Imaging, and Spectroscopy, NBSIS 2015
CountryKorea, Republic of
CityJeju
Period15/2/2515/2/27

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All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Biomaterials
  • Atomic and Molecular Physics, and Optics
  • Radiology Nuclear Medicine and imaging

Cite this

Song, H., Choi, J. R., Lee, W., Kim, D., Lee, D., & Kim, K. (2015). The gap-plasmonic effect induced on a silver nanoisland substrate for surface-enhanced Raman spectroscopy. In International Conference on Nano-Bio Sensing, Imaging, and Spectroscopy 2015, NBSIS 2015 (Vol. 9523). [95230D] SPIE. https://doi.org/10.1117/12.2189247