Electrochemical detection of hybridized DNA using reduction of methylene blue

S. B. Cho, J. S. Hong, Y. K. Pak, J. J. Pak

Research output: Contribution to journalConference articlepeer-review

3 Citations (Scopus)


One of the important roles of a DNA sensor is the capability of detecting genetic diseases or mutations by analyzing DNA sequence. The electrochemical detection method can be simpler and cheaper than other methods available and hence this method was investigated in this paper. For a successful electrochemical detection, several aspects should be considered including chemical treatment of electrode surface, DNA immobilization on electrode, hybridization, choice of an intercalator to be bound to double stand DNA selectively, and an equipment for detecting and analyzing the output signal. The intercalator bound to double strand DNA results in an electrical current. With the electrochemical detection method, double strand DNA was distinguished from single strand DNA or bare gold electrode by measuring reduction current of intercalator. Also, it was found that the reduction current of intercalator is proportional to the concentration of target DNA to be hybridized with probe DNA. Therefore, it is possible to realize a simple and cheap DNA sensor using the electrochemical detection method for DNA sequencing.

Original languageEnglish
Pages (from-to)2937-2940
Number of pages4
JournalAnnual Reports of the Research Reactor Institute, Kyoto University
Publication statusPublished - 2001
Event23rd Annual International Conference of the IEEE Engineering in Medicine and Biology Society - Istanbul, Turkey
Duration: 2001 Oct 252001 Oct 28


  • DNA
  • Electrochemical detection
  • Intercalator

ASJC Scopus subject areas

  • Energy Engineering and Power Technology
  • Mechanical Engineering


Dive into the research topics of 'Electrochemical detection of hybridized DNA using reduction of methylene blue'. Together they form a unique fingerprint.

Cite this