Synthesis and electric properties of apoferritin and gold nanoparticle composite films

• 1、School of Materials Science and Engineering, Zhejiang University, Hangzhou 310027

Abstract：In this paper, we prepared apoferritin and gold nanoparticle composite films by reducing the preloaded Au precouser into the cross-linked the apoferritin thin films. The apoferritin films were perepared by assembling apoferritin/metal hydroxide nanostrands and filtered on porous support by cross-linking and removing away the nanostrands. The amount and size of the gold nanoparticles could be easily controlled by the loading amount of the precouser and the reduction process. It was found the the gold nanoparticles size could be varied from several nanometers to 100 nm. We further found that the conductivity of the apoferritin/Au nanoparticle composite thin film was significantly increased and 2-3 orders as that of the pure apoferritin thin film. This composite film may hold the potential for catalytic and separation applicaion. The corresponding properties need further study.

Keywords： apoferritin gold nanoparticles composite thin films conductivity