| 摘要 |
<p>A surface having provided thereon a print, e.g. fingerprint, palm print, is contacted with a fluid, prefereably acidic, containing a monomer, e.g. aniline, pyrrole, thiophene. An electrical current is passed between the surface and the fluid to deposit polymer on the surface (i.e. electropolymerization of the monomer) at locations contacted by the fluid (e.g. between the ridges of a fingerprint). An electric potential can then be applied to the surface to visualise the print using electrochromic properties of the deposited polymer.</p> |
