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Selective zinc ion detection by functionalised ZnO nanorods with ionophore
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.
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2011 (English)In: Journal of Applied Physics, ISSN 0021-8979, E-ISSN 1089-7550, Vol. 110, no 10, 104702- p.Article in journal (Refereed) Published
Abstract [en]

In this paper, highly dense and well aligned single-crystal zinc oxide nanorods were grown along the c-axis on a gold coated glass substrate using a low temperature aqueous chemical growth approach. The prepared ZnO nanorods were functionalized with plastic membrane coatings containing specific ionophore (12-crown-4) which is highly selective to zinc ions (Zn(+2)). The electrochemical response of the sensor was found to be linear over a relatively wide logarithmic concentration range from 1 mu M to 100mM. The proposed sensor showed a good linearity with a high sensitivity of similar to 35 mV/decade for sensing Zn(+2) ions. A fast response time of less than 5 s with a good selectivity, repeatability, reproducibility, and negligible response to common interferents ions such as calcium (Ca(2+)), magnesium (Mg(2+)), or potassium (K(+)), and iron (Fe(+3)) and copper (Cu(+2)) was also demonstrated. Moreover, the proposed sensor showed good stoichiometric results for potentiometric titration.

Place, publisher, year, edition, pages
American Institute of Physics (AIP) , 2011. Vol. 110, no 10, 104702- p.
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Engineering and Technology
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URN: urn:nbn:se:liu:diva-74167DOI: 10.1063/1.3662107ISI: 000297943700129OAI: oai:DiVA.org:liu-74167DiVA: diva2:480834
Available from: 2012-01-20 Created: 2012-01-20 Last updated: 2017-12-08

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Hussain Ibupoto, ZafarUsman Ali, SyedNur, OmerWillander, Magnus

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