(a)
(b)
(c)
Figure 4: (a) Amperometric response of the string-based glucose biosensor after addition of 5 mM glucose and 0.1 mM of each interfering species including ascorbic acid (AA), uric acid (UA), galactose (GA), and acetaminophen (AAP) in 0.1 M PBS (pH 7.4). (b) Reusability test of the string-based glucose biosensor using a response to 0.1 mM glucose in 0.1 M PBS (pH 7.4) solution. (c) Stability test of the string-based glucose biosensor by measuring the current response to 0.03 mM glucose after 4°C storage for 5 days.