Nanophotonic crescent structures with sharp edge for ultrasensitive biomolecular detections by local electromagnetic field enhancement effect

Yu Lu, Gang Logan Liu, Jaeyoun Kim, Yara X. Mejia, Luke P. Lee

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

Abstract

we report the design, fabrication, characterizations of a biocompatible single composite nanocrescent SERS nanoprobe, which can function not only as standalone SERS substrates, but also has a magnetically controllable capability in orientation and translation motions. The circular orifice of sharp-edged single nanocrescent allows multiple coupling of integrated SERS hot spots. The nanocrescent as a single SERS nanoprobe demonstrates more than 108 times higher local field enhancement factor than single metallic nanospheres especially in the near infrared range because of the hybrid plasmon resonance modes. Since our nanoscrescent is formed by Au/Ag/Fe/Au composite layers, we can modulate not only its orientation to find maximized local field enhancement and SERS enhancement factors with respect to the excitation source, but also the translational positions and motions by external magnetic fields. Magnetically modulated SERS detection of molecules on a single composite nanocrescent probe is demonstrated.

Original languageEnglish (US)
Title of host publicationMicro Total Analysis Systems - Proceedings of MicroTAS 2005 Conference
Subtitle of host publication9th International Conference on Miniaturized Systems for Chemistry and Life Sciences
PublisherTransducer Research Foundation
Pages1230-1233
Number of pages4
ISBN (Print)0974361119, 9780974361116
StatePublished - Jan 1 2005
Event9th International Conference on Miniaturized Systems for Chemistry and Life Sciences, MicroTAS 2005 - Boston, MA, United States
Duration: Oct 9 2005Oct 13 2005

Publication series

NameMicro Total Analysis Systems - Proceedings of MicroTAS 2005 Conference: 9th International Conference on Miniaturized Systems for Chemistry and Life Sciences
Volume1

Other

Other9th International Conference on Miniaturized Systems for Chemistry and Life Sciences, MicroTAS 2005
CountryUnited States
CityBoston, MA
Period10/9/0510/13/05

Keywords

  • Lable-free
  • Magnetic
  • Nanocrescents
  • SERS

ASJC Scopus subject areas

  • Chemical Engineering (miscellaneous)
  • Bioengineering

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