Investigation of the electrical stability of Si-nanowire biologically sensitive field-effect transistors with embedded Ag/AgCl pseudo reference electrode
SCIE
SCOPUS
- Title
- Investigation of the electrical stability of Si-nanowire biologically sensitive field-effect transistors with embedded Ag/AgCl pseudo reference electrode
- Authors
- Taiuk Rim; Kihyun Kim; Nanki Hong; Wooree Ko; Chang-Ki Baek; Sangmin Jeon; M. Jamal Deen; Meyyappan, M; Jeong, YH; Jeong-Soo Lee
- Date Issued
- 2013-06
- Publisher
- RSC Publishing
- Abstract
- We report on the electrical stability of Si-nanowire biologically sensitive field-effect transistors (BioFETs) fabricated using conventional microfabrication technique, with an embedded Ag/AgCl pseudo-reference electrode (pRE) formed by an electrochemical method. The open-circuit potential (OCP) characteristics between the pRE and a commercial reference electrode have been measured in order to evaluate the influence of the pRE potential on the device performance. In a pH sensing mode, the fabricated pRE follows the applied potential accurately with a small offset value of below 6 mV for pH in the range of 4 to 10. The BioFET was also used for the detection of alpha fetoprotein (AFP) with a detection limit of 10 pg mL(-1) and the corresponding OCP fluctuation of the pRE was less than 1.5 mV, independent of the AFP concentrations. These results suggest that the Si-NW BioFETs with the embedded Ag/AgCl pRE are very promising for reliable biosensing applications.
- URI
- https://oasis.postech.ac.kr/handle/2014.oak/14730
- DOI
- 10.1039/C3RA40768C
- ISSN
- 2046-2069
- Article Type
- Article
- Citation
- RSC Advances, vol. 3, no. 21, page. 7963 - 7969, 2013-06
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