title: Fabrication of Amperometric Glucose Sensor Using Glucose Oxidase-Cellulose Nanofiber Aqueous Solution.
abstract: Cellulose nanofiber aqueous solution, which remained virtually transparent for more than one week, was prepared by using the clear upper layer of diluted cellulose nanofiber solution produced by wet jet milling. Glucose oxidase (GOx) was easily dissolved in this solution and GOx-immobilized electrode was easily fabricated by simple repetitious drops of GOx-cellulose solution on the surface of a platinum-iridium electrode. Glucose sensor properties of the obtained electrodes were examined in phosphate buffer solution of pH 7.4 at 40°C. The obtained electrode provided a glucose sensor response with significantly high response speed and good linear relationship between glucose concentration and response current. After an initial decrease of response sensitivity for a few days, relatively constant sensitivity was obtained for about 20 days. Nevertheless, the influence of electroactive compounds such as ascorbic acid, uric acid and acetoaminophen were not negletable.
authors.affiliation: Department of Chemical Science and Technology, Institute of Science and Technology, Tokushima University.
authors.forename: Mikito
authors.initials: M
authors.lastname: Yasuzawa
authors.forename: Yuya
authors.initials: Y
authors.lastname: Omura
authors.forename: Kentaro
authors.initials: K
authors.lastname: Hiura
authors.forename: Jiang
authors.initials: J
authors.lastname: Li
authors.forename: Yusuke
authors.initials: Y
authors.lastname: Fuchiwaki
authors.forename: Masato
authors.initials: M
authors.lastname: Tanaka
mesh_terms: D001234:Aspergillus niger / Q000201:enzymology; D015374:Biosensing Techniques / Q000379:methods*; D002482:Cellulose / Q000737:chemistry*; D004563:Electrochemistry; D004566:Electrodes; D004800:Enzymes, Immobilized / Q000737:chemistry / Q000378:metabolism; D005947:Glucose / Q000032:analysis* / Q000737:chemistry; D005949:Glucose Oxidase / Q000737:chemistry / Q000378:metabolism*; D057139:Nanofibers / Q000737:chemistry*; D012996:Solutions; D014867:Water / Q000737:chemistry*
chemical_list: D004800:Enzymes, Immobilized; D012996:Solutions; D014867:Water; D002482:Cellulose; D005949:Glucose Oxidase; D005947:Glucose