化学气相沉积聚合物薄膜中的自发极化产生大电场

Stefan Schröder1,2*, Torge Hartig1, Kai Uwe Clausen3, Thomas Strunskus1,2, Franz Faupel1,2 Controlled surface potentials in permanently polarized polymer films are of increasing interest for electronics, sensing, and biomedical devices. Conventional polymer films require external electric fields or postdeposition treatments, limiting precision and scalability. Here, we report a spontaneous polarization in polymer thin films polymerized through initiated chemical vapor deposition (iCVD). Surface potentials emerge spontaneously during film growth, scale linearly with film thickness, and remain stable under ambient conditions. their magnitude is tunable through deposition parameters, and polymerization initiator choice determines the polarity. the solvent- free, single- step iCVD process enables mechanically robust, uniform coatings on complex geometries and large areas. …