An inkjet-printed chemical fuse

Mabrook, M. F.; Pearson, C.; Petty, M. C.
January 2005
Applied Physics Letters;1/3/2005, Vol. 86 Issue 1, p013507
Academic Journal
Inkjet printing of the conductive polymer poly(3,4-ethylene dioxythiophene) doped with polystyrene sulfonated acid has been used as the basis for a sensor for organic vapors. The electrical resistance of the film was monitored as it was exposed to atmospheres containing alcohol. Ultrathin films exhibited a sharp and nonreversible increase in their resistance. This resulted from a change in the morphology of the organic layer, thereby disrupting the current flow through the polymer. An intended application for these inkjet-printed devices is in disposable handheld instruments to monitor the presence of organic vapors above a threshold level.


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