Sensitive DNA biosensor based on a long-period grating formed on the side-polished fiber surface

  • Hyun Soo Jang
  • , Kwang No Park
  • , Jun P. Kim
  • , Sang Jun Sim
  • , Oh J. Kwon
  • , Young Geun Han
  • , Kyung Shik Lee

Research output: Contribution to journalArticlepeer-review

105 Citations (Scopus)

Abstract

We demonstrate a sensitive DNA biosensor based on a long period grating (LPG) formed by a photolithograph process on the surface of a side-polished fiber. The biomolecules of the biosensor were immobilized on the silica surface between LPG patterns. The resonance wavelength was red-shifted after the binding of the poly-L-lysine, probe ssDNA and target ssDNA to the sensor surface. The overall wavelength shift after the successful DNA hybridization was 1.82 nm. The proposed LPG-based DNA biosensor is ∼2.5 times more sensitive than the previously reported fiber grating-based DNA biosensors.

Original languageEnglish
Pages (from-to)3855-3860
Number of pages6
JournalOptics Express
Volume17
Issue number5
DOIs
Publication statusPublished - 2009 Mar 2
Externally publishedYes

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics

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