DNA sensing using split-ring resonator alone at microwave regime

Hee Jo Lee, Hyun Seok Lee, Kyung Hwa Yoo, Jong Gwan Yook

Research output: Contribution to journalArticle

100 Citations (Scopus)


In this paper, the feasibility of utilization of a single element double split-ring resonator as a biosensing device has been demonstrated. The compact resonator has been excited by time-varying magnetic fields generated from the 50 Ω microstrip transmission line. In this work, DNA hybridization is recognized with shift in S21 resonant frequency. When thiol-linked single stranded-DNA is immobilized onto a gold (Au) surface and is then coupled with complementary-DNA, the frequency changes by Δfss-DNA =20 MHz and Δfhybridization =60 MHz, respectively. Thus, it is clear that the resonator can be utilized as a DNA sensing element in the microwave regime.

Original languageEnglish
Article number014908
JournalJournal of Applied Physics
Issue number1
Publication statusPublished - 2010 Jul 1

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy(all)

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