The purpose of this study is to fabricate a transducer-based TiO2 interdigitated microelectrodes with various gap sizes. The most stable electrical properties have been selected for Escherichia. coli O157:H7 DNA detection.
Sol-gel was used to synthesize TiO2 nanoparticles. Lift-off photolithography process was used for fabrication of interdigitated electrodes (IDEs) and dry-state DNA detection was done using a Picoammeter.
TiO2 nanoparticles IDEs with 16-um gap size is able to detect DNA of E. coli in a dry state.
This paper describes IDEs for dry-state detection of E. coli O157:H7 DNA. The technique presented in this paper ensures the high uniformity of nanoparticle deposition on the finger electrode.
The author would like to thank all staff members of the Institute of Nano Electronic Engineering at Universiti Malaysia Perlis (UniMAP) for their technical advice and contributions, both directly and indirectly.
Nadzirah, S. and Hashim, U. (2017), "Interdigitated microelectrode geometry for simple electrical
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