| 摘要 |
A polymeric membrane, such as a polyester film, is coated with a conductive metal film such as gold or silver. It is immersed in an aprotic solvent, such as dimethylformamide (DMF), and preferably also an organic electrolyte such as tetra-n-butylammonium. The immersed, metal coated polymeric membrane then undergoes an electrochromic colour change when electrically polarised. For example, gold and silver coated polymeric membranes undergo a colourless to vivid red colouration when the polarising potential is cycled between 0 and -4V. The colour change may be reversed upon reversal of the polarisation potential. The colour change, or reversal of such a colour change, may be effected by the application of a state state or a cyclic potential waveform. |
