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Selective zinc ion detection by functionalised ZnO nanorods with ionophore
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- Hussain Ibupoto, Zafar (author)
- Linköpings universitet,Institutionen för teknik och naturvetenskap,Tekniska högskolan
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- Usman Ali, Syed (author)
- Linköpings universitet,Institutionen för teknik och naturvetenskap,Tekniska högskolan
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- Chey, C O (author)
- Linköpings universitet,Institutionen för teknik och naturvetenskap,Tekniska högskolan
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- (creator_code:org_t)
- American Institute of Physics (AIP), 2011
- 2011
- English.
- In: Journal of Applied Physics. - : American Institute of Physics (AIP). - 0021-8979 .- 1089-7550. ; 110:10, s. 104702-
- Journal article (peer-reviewed)
Abstract
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- 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.
Keyword
- TECHNOLOGY
- TEKNIKVETENSKAP
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- art (subject category)
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