Cobalt oxide magnetic nanoparticles-chitosan nanocomposite based electrochemical urea biosensor

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Ali, A.Riphah Int University, Pakistan (author)

Cobalt oxide magnetic nanoparticles-chitosan nanocomposite based electrochemical urea biosensor

Article/chapterEnglish2015

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2014-09-24
Springer Verlag (Germany),2015
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LIBRIS-ID:oai:DiVA.org:liu-117212
https://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-117212URI
https://doi.org/10.1007/s12648-014-0594-3DOI

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Language:English
Summary in:English

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Subject category:ref swepub-contenttype
Subject category:art swepub-publicationtype

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Funding Agencies|King Saud University, Deanship of Scientific Research, College of Science Research Center
In this study, a potentiometric urea biosensor has been fabricated on glass filter paper through the immobilization of urease enzyme onto chitosan/cobalt oxide (CS/Co3O4) nanocomposite. A copper wire with diameter of 500 mu m is attached with nanoparticles to extract the voltage output signal. The shape and dimensions of Co3O4 magnetic nanoparticles are investigated by scanning electron microscopy and the average diameter is approximately 80-100 nm. Structural quality of Co3O4 nanoparticles is confirmed from X-ray powder diffraction measurements, while the Raman spectroscopy has been used to understand the chemical bonding between different atoms. The magnetic measurement has confirmed that Co3O4 nanoparticles show ferromagnetic behavior, which could be attributed to the uncompensated surface spins and/or finite size effects. The ferromagnetic order of Co3O4 nanoparticles is raised with increasing the decomposition temperature. A physical adsorption method is adopted to immobilize the surface of CS/Co3O4 nanocomposite. Potentiometric sensitivity curve has been measured over the concentration range between 1 x 10(-4) and 8 x 10(-2) M of urea electrolyte solution revealing that the fabricated biosensor holds good sensing ability with a linear slope curve of similar to 45 mV/decade. In addition, the presented biosensor shows good reusability, selectivity, reproducibility and resistance against interferers along with the stable output response of similar to 12 s.

Subject headings and genre

TEKNIK OCH TEKNOLOGIER Elektroteknik och elektronik hsv//swe
ENGINEERING AND TECHNOLOGY Electrical Engineering, Electronic Engineering, Information Engineering hsv//eng
Potentiometric biosensors; Metal oxide; Nanoparticles and urea sensing

Added entries (persons, corporate bodies, meetings, titles ...)

Israr-Qadir, MuhammadLinköpings universitet,Fysik och elektroteknik,Tekniska högskolan(Swepub:liu)muhqa30 (author)
Wazir, Z.Riphah Int University, Pakistan (author)
Tufail, M.Riphah Int University, Pakistan (author)
Ibupoto, Zafar HussainLinköpings universitet,Fysik och elektroteknik,Tekniska högskolan(Swepub:liu)zafib04 (author)
Jamil-Rana, SadafLinköpings universitet,Fysik och elektroteknik,Tekniska högskolan(Swepub:liu)sadra54 (author)
Atif, M.King Saud University, Saudi Arabia; National Institute Lasers and Optron, Pakistan (author)
Khan, S. A.National Centre Phys, Pakistan (author)
Willander, MagnusLinköpings universitet,Fysik och elektroteknik,Tekniska högskolan(Swepub:liu)magwi72 (author)
Riphah Int University, PakistanFysik och elektroteknik (creator_code:org_t)

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In:Indian Journal of Physics: Springer Verlag (Germany)89:4, s. 331-3360973-14580974-9845

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ENGINEERING AND TECHNOLOGY: ENGINEERING AND ...; and Electrical Engin ...

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