2.1. Materials
K3[Fe(CN)6]•3H2O was
brought from Fuchen Chemical Reagent Factory (China). Poly
(N-vinylpyrrolidone) (PVP) was obtained from Zhanyun Chemical Co., Ltd.
(China). Ofloxacin, Haluronic acid and Polyacrylic acid were obtained
from Macklin Biotechnology Co., Ltd (China).
1-(3-dimethylaminopropyl)-3-ethylcarbodiimide hydrochloride (EDC) and
N-hydroxysuccinimide (NHS) were purchased from Sigma Aldrich. All other
chemicals and solvents were of reagent grade.