Carbon-nanotube-resonator-based biosensors

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

Research output: Contribution to journalArticlepeer-review

18 Citations (Scopus)


A study was conducted to demonstrate carbon nanotube (CNT) resonator-based biosensors, using the biotin-streptavidin system. The CNT resonators were fabricated by connecting the interdigital capacitor to the CNT in parallel. It was found that these CNT resonators exhibited a clear resonance at approximately 10-13 GHz, depending on the device. The resonator frequency was lowered by approximately 0.7-1.3 GHz and the Q factor was enhanced, after the streptavidin was bound to the biotinylated CNT. The resonance frequency shift and the enhanced Q factor were explained by the increase in CCNT and R f, according to the simulation results. The resonance frequency measurements and their sensitivity was not reduced for devices with metallic and semiconducting CNTs, as the CNT resonator-based biosensors can detect biomolecules by measuring the capacitance change through the resonance frequency measurements.

Original languageEnglish
Pages (from-to)1723-1727
Number of pages5
Issue number10
Publication statusPublished - 2008 Oct

All Science Journal Classification (ASJC) codes

  • Biotechnology
  • Biomaterials
  • Chemistry(all)
  • Materials Science(all)


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