Potentiometric cholesterol biosensor based on ZnO nanorods chemically grown on Ag wire
2010 (English)In: Thin Solid Films, ISSN 0040-6090, E-ISSN 1879-2731, Vol. 519, no 3, 1106-1109 p.Article in journal (Refereed) Published
An electrochemical biosensor based on ZnO nanorods for potentiometric cholesterol determination is proposed. Hexagon-shaped ZnO nanorods were directly grown on a silver wire having a diameter of 250 mu m using low temperature aqueous chemical approach that produced ZnO nanorods with a diameter of 125250 nm and a length of similar to 1 mu m. Cholesterol oxidase (ChOx) was immobilized by a physical adsorption method onto ZnO nanorods. The electrochemical response of the ChOx/ZnO/Ag biosensor against a standard reference electrode (Ag/AgCl) was investigated as a logarithmic function of the cholesterol concentration (1 x 10(-6)M to 1 x 10(-2)M) showing good linearity with a sensitivity of 35.2 mV per decade and the stable output signal was attained at around 10 s.
Place, publisher, year, edition, pages
Elsevier Science B.V., Amsterdam. , 2010. Vol. 519, no 3, 1106-1109 p.
Potentiometric biosensor; Cholesterol; Cholesterol oxidase; Electrostatic immobilization; ZnO nanorods
National CategoryEngineering and Technology
IdentifiersURN: urn:nbn:se:liu:diva-63930DOI: 10.1016/j.tsf.2010.08.052ISI: 000285075300032OAI: oai:DiVA.org:liu-63930DiVA: diva2:385002