Chemically fashioned ZnO nanowalls and their potential application for potentiometric cholesterol biosensor

M. Q. Israr, J. R. Sadaf, O. Nur, M. Willander, Salah Salman, Bengt Danielsson

Research output: Contribution to journalArticlepeer-review

46 Citations (SciVal)

Abstract

Chemically fashioned zinc oxide (ZnO) nanowalls on aluminum wire have been characterized and utilized to fabricate a potentiometric cholesterol biosensor by an electrostatic conjugation with cholesterol oxidase. The sensitivity, specificity, reusability, and stability of the conjugated surface of ZnO nanowalls with thickness of similar to 80 nm have been investigated over a wide logarithmic concentrations of cholesterol electrolyte solution ranging from 1x10(-6)-1x10(-3) M. The presented biosensor illustrates good linear sensitivity slope curve (similar to 53 mV/decade) corresponding to cholesterol concentrations along with rapid output response time of similar to 5 s. (C) 2011 American Institute of Physics. [doi:10.1063/1.3599583]
Original languageEnglish
Article number253705
JournalApplied Physics Letters
Volume98
Issue number25
DOIs
Publication statusPublished - 2011

Subject classification (UKÄ)

  • Biochemistry and Molecular Biology

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