Organic molecular sensor with plasmon antenna

M. Yanagisawa*, N. Shimamoto, T. Nakanishi, M. Saito, T. Osaka

*Corresponding author for this work

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

8 Citations (Scopus)


An organic molecular sensor with a plasmon antenna was developed. A coaxial Ag grating antenna was designed by a finite differential time domain (FDTD) calculation and fabricated by a lift-off process. When pumping light was irradiated onto the sensor, a surface plasmon wave was generated and focused at the center of the antenna; this wave produced a strong electric field. By coating a cystamine self-assembled monolayer (SAM) onto the sensor, strong Raman scattering light produced by a surface-enhanced Raman scattering (SERS) effect was observed at the center of the device. The Raman spectrum showed good agreement with that of cystamine on a Ag surface. The Raman intensity at the center of the device increased significantly and was more than 2,000 times that outside the device. Our optical sensor can detect an unknown single molecule and can be incorporated into other sensors such as gas sensors and biosensors.

Original languageEnglish
Title of host publicationECS Transactions - Chemical Sensors 8
Subtitle of host publicationChemical (Gas, Ion, Bio) Sensors and Analytical Systems
PublisherElectrochemical Society Inc.
Number of pages13
ISBN (Print)9781566776578
Publication statusPublished - 2009
EventChemical Sensors 8: Chemical (Gas, Ion, Bio) Sensors and Analytical Systems - 214th ECS Meeting - Honolulu, HI, United States
Duration: 2008 Oct 122008 Oct 17

Publication series

NameECS Transactions
ISSN (Print)1938-5862
ISSN (Electronic)1938-6737


ConferenceChemical Sensors 8: Chemical (Gas, Ion, Bio) Sensors and Analytical Systems - 214th ECS Meeting
Country/TerritoryUnited States
CityHonolulu, HI

ASJC Scopus subject areas

  • Engineering(all)


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