Sava Ion, Asandulesa Mihai, Barzic Andreea Irina, Albu Raluca Marinica, Stoica Iuliana
"Petru Poni" Institute of Macromolecular Chemistry, Aleea Gr. Ghica Voda 41A, 700487 Iasi, Romania.
Materials (Basel). 2023 Jul 13;16(14):4980. doi: 10.3390/ma16144980.
Azo-polyimide films with supramolecular structure were obtained by casting onto glass plates a mixture based on polyamidic acid and different quantities of azochromophore, followed by thermal treatment to realize the final azo-polyimide structure. The dielectric characteristics of the supramolecular structure of polymer films were investigated by broad-band dielectric spectroscopy measurements at different temperatures and frequencies. The free-standing films proved to be flexible and tough and maintained their integrity after repeated bending. The work of adhesion at the polymer/platinum interface was calculated after the evaluation of the surface energy parameters before and after plasma treatment. Atomic force microscopy was used to image the surface morphology, the evolution of the roughness parameters, and the adhesion force between the platinum-covered tip and the polymer surface, registered at the nanoscale with the quantity of the azo dye introduced in the system. The simulation of the columnar growth of a platinum layer was made to provide information about the deposition parameters that should be used for optimal results in the deposition of platinum electrodes for sensors.
通过将基于聚酰胺酸和不同量偶氮发色团的混合物浇铸在玻璃板上，然后进行热处理以实现最终的偶氮聚酰亚胺结构，从而获得具有超分子结构的偶氮聚酰亚胺薄膜。通过在不同温度和频率下进行宽带介电谱测量，研究了聚合物薄膜超分子结构的介电特性。独立的薄膜被证明是柔性且坚韧的，并且在反复弯曲后仍保持其完整性。在评估等离子体处理前后的表面能参数之后，计算了聚合物/铂界面处的粘附功。使用原子力显微镜对表面形态、粗糙度参数的演变以及铂覆盖的尖端与聚合物表面之间的粘附力进行成像，该粘附力在纳米尺度上与系统中引入的偶氮染料的量相关。对铂层的柱状生长进行了模拟，以提供有关在传感器铂电极沉积中应使用的沉积参数的信息，以便获得最佳结果。
