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A solution processed carbon nanotube modified conducting paper sensor for cancer detection
Delhi Technology University, India.
Linköping University, Department of Science and Technology, Physics and Electronics. Linköping University, Faculty of Science & Engineering.ORCID iD: 0000-0001-6235-7038
Delhi Technology University, India.
Delhi Technology University, India.
2015 (English)In: Journal of materials chemistry. B, ISSN 2050-750X, E-ISSN 2050-7518, Vol. 3, no 48, 9305-9314 p.Article in journal (Refereed) Published
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Abstract [en]

A solution processed poly(3,4-ethylenedioxythiophene): poly(styrenesulfonate) (PEDOT:PSS)-carbon nanotube (CNT) nano-composite has been utilized for the fabrication of a conducting paper (CP) via dip coating. Further, high conductivity of this paper (from similar to 6.5 x 10(-4) to 2.2 x 10(-2) S cm(-1)) obtained by treating it with formic acid (CNT/FA@CP) is due to the removal of the non-conducting PSS molecules from its surface. This smart conducting platform has been used for the conjugation of the anti-carcinoembronic antigen (CEA) protein for quantitative estimation of CEA, a cancer biomarker. Transmission electron microscopy (TEM), Raman spectroscopy, X-ray diffraction (XRD), scanning electron microscopy (SEM), X-ray photoelectron spectroscopy (XPS), electrochemical impedance spectroscopy (EIS) and amperometric techniques have been used to characterize the low cost, flexible and environmentally friendly conducting BSA/anti-CEA/CNT/FA@CP) paper electrode that is found to be highly sensitive (7.8 mu A ng(-1) ml cm(-2)) in the physiological range (2-15 ng ml(-1)) of CEA. The response of the paper electrode is validated using CEA concentration of serum samples of cancer patients obtained via the immunoassay technique.

Place, publisher, year, edition, pages
ROYAL SOC CHEMISTRY , 2015. Vol. 3, no 48, 9305-9314 p.
National Category
Electrical Engineering, Electronic Engineering, Information Engineering
Identifiers
URN: urn:nbn:se:liu:diva-123847DOI: 10.1039/c5tb02169cISI: 000366163900009OAI: oai:DiVA.org:liu-123847DiVA: diva2:892837
Note

Funding Agencies|DTU

Available from: 2016-01-11 Created: 2016-01-11 Last updated: 2016-01-11

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