We present improved RF circuit modeling of a biosensing element based on a single-walled carbon nanotube combined interdigital capacitors at microwave frequencies. From the resultant circuit, the lumped element values for biomolecular binding are accurately obtained. It is thereby found that the completed RF circuit model shows excellent agreement with measured results. This implies that the electrical properties of a specific biomolecular binding system can be quantitatively analyzed if an optimal RF circuit model is constructed. Finally, we suggest that the suggested methodology can be used to analyze other biomolecular sensing methods.
Bibliographical noteFunding Information:
Manuscript received April 20, 2009; accepted September 20, 2010. Date of publication September 29, 2010; date of current version November 10, 2010. This work was supported by the Ministry of Knowledge and Economy, Korea, under the Information Technology Research Center supported program IITA-2009-C1090-0801-0038. The review of this paper was arranged by Associate Editor L.-E. Wernersson.
All Science Journal Classification (ASJC) codes
- Computer Science Applications
- Electrical and Electronic Engineering