2.2.2. Immobilized enzyme membrane
Glucose oxidase (1 mg) was dissolved in 200 l of 0.1M
PBS (pH 7.8), and 25l of the resulting solution was mixed
with 80 mg of AWP. Next, a dialysis membrane soaked in distilled
water was evenly spread over a glass plate without bubbles
and then completely dried. The above-mentioned enzyme and
AWP mixture was evenly applied and rubbed into the dialysis
membrane. After drying for 1 h in the dark, the membrane was
placed under a fluorescent lamp for 1 h to prepare an immobilized
enzyme membrane. AWP is a photosensitive polymer,
and hardens with time to immobilize the enzyme. The resulting
membrane was cut into 8mm×3mm strips, soaked in distilled
water again and then dried on filter paper. Due to differences
in drying shrinkage between the dialysis membrane and AWP,
each strip curled and formed a tube (Fig. 1A (3)).