Abstract
Tetracycline hydrochloride (Tc) was found to be adsorbed well into a Nafion (Nf) film. The kinetic analysis suggested that the adsorption of Tc into the Nf film is controlled by its diffusion in the Nf film with a diffusion coefficient of D =8.5×10 -9 cm 2 s -1 . The adsorption isothermal was analyzed by a Brunauer-Emmett-Teller (BET) equation suggesting multilayer adsorption of Tc into the film. Furthermore, the growth of gold crystals could be observed if the Tc-adsorbed Nf film was dipped into the HAuCl 4 solution, and the experimental results demonstrate that the shape of gold nanocrystals can be controlled by simply changing the concentration of HAuCl 4 solution. The research results are significant and the approach described here would provide new train of thought to develop composite functional film consisting of metal nanoparticles embedded in a polymer matrix. New materials with novel properties originating from the combination of the inorganic components and the polymer can be made and they have promising applications in the field of optical sensing.
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