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Functionalized ZnO nanorod-based selective magnesium ion sensor for intracellular measurements
Linköping University, Department of Science and Technology. Linköping University, The Institute of Technology.
Linköping University, Department of Science and Technology. Linköping University, The Institute of Technology.
Linköping University, Department of Science and Technology. Linköping University, The Institute of Technology.
Linköping University, Department of Science and Technology. Linköping University, The Institute of Technology.ORCID iD: 0000-0001-6235-7038
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2010 (English)In: Biosensors & bioelectronics, ISSN 0956-5663, E-ISSN 1873-4235, Vol. 26, no 3, 1118-1123 p.Article in journal (Refereed) Published
Abstract [en]

ZnO nanorods were grown on a silver-coated tip of a borosilicate glass capillary (0.7 mu m in tip diameter) and used as selective potentiometric sensor of intracellular free Mg2+. To functionalize the ZnO nanorods for selectivity of Mg2+, a polymeric membrane with Mg2+-selective ionophores were coated on the surface of the ZnO nanorods. These functionalized ZnO nanorods exhibited a Mg2+-dependent electrochemical potential difference versus an Ag/AgCl reference microelectrode within the concentration range from 500 nM to 100 mM. Two types of cells, human adipocytes and frog oocytes, were used for the intracellular Mg2+ measurements. The intracellular concentration of free Mg2+ in human adipocytes and frog oocytes were 0.4-0.5 and 0.8-0.9 mM, respectively. Such type of nanoelectrode device paves the way to enable analytical measurements in single living cells and to sense other bio-chemical species at the intracellular level.

Place, publisher, year, edition, pages
Elsevier Science B.V., Amsterdam. , 2010. Vol. 26, no 3, 1118-1123 p.
Keyword [en]
ZnO nanorods, Potentiometric, Mg2+-selective membrane, Human adipocyte, Frog oocyte
National Category
Medical and Health Sciences
Identifiers
URN: urn:nbn:se:liu:diva-62158DOI: 10.1016/j.bios.2010.08.017ISI: 000283813600027OAI: oai:DiVA.org:liu-62158DiVA: diva2:371269
Note
Original Publication: Muhammad Asif, Syed Usman Ali, Omer Nour, Magnus Willander, Ulrika Englund and Fredrik Elinder, Functionalized ZnO nanorod-based selective magnesium ion sensor for intracellular measurements, 2010, BIOSENSORS and BIOELECTRONICS, (26), 3, 1118-1123. http://dx.doi.org/10.1016/j.bios.2010.08.017 Copyright: Elsevier Science B.V., Amsterdam. http://www.elsevier.com/ Available from: 2010-11-19 Created: 2010-11-19 Last updated: 2017-12-12

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Asif, MuhammadUsman Ali, SyedNour, OmerWillander, MagnusEnglund, UlrikaElinder, Fredrik

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