A single-walled carbon nanotube thin film-based pH-sensing microfluidic chip
- Title
- A single-walled carbon nanotube thin film-based pH-sensing microfluidic chip
- Author
- 성기훈
- Issue Date
- 2014-03
- Publisher
- Royal Society of Chemistry
- Citation
- The Analyst : An International Journal of Analytical and Bioanalytical Science,v.139,no.8 2014년, pp.2011 - 2015
- Abstract
- A novel microfluidic pH-sensing chip was developed based on pH-sensitive single-walled carbon nanotubes (SWCNTs). In this study, the SWCNT thin film acted both as an electrode and a pH-sensitive membrane. The potentiometric pH response was observed by electronic structure changes in the semiconducting SWCNTs in response to the pH level. In a microfluidic chip consisting of a SWCNT pH-sensing working electrode and an Ag/AgCl reference electrode, the calibration plot exhibited promising pH-sensing performance with an ideal Nernstian response of 59.71 mV pH(-1) between pH 3 and 11 (standard deviation of the sensitivity is 1.5 mV pH(-1), R-2 = 0.985). Moreover, the SWCNT electrode in the microfluidic device showed no significant variation at any pH value in the range of the flow rate between 0.1 and 15 mu l min(-1). The selectivity coefficients of the SWCNT electrode revealed good selectivity against common interfering ions.
- URI
- http://pubs.rsc.org/en/Content/ArticleLanding/2014/AN/c3an02195e#!divAbstracthttp://hdl.handle.net/20.500.11754/55043
- ISSN
- 0003-2654; 1364-5528
- DOI
- 10.1039/c3an02195e
- Appears in Collections:
- GRADUATE SCHOOL[S](대학원) > BIONANOTECHNOLOGY(바이오나노학과) > Articles
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