论文标题
反向释放超快激光处理的聚合物的表面粘附
Surface Adhesion of Back-Illuminated Ultrafast Laser-Treated Polymers
论文作者
论文摘要
我们报告说，当玻璃基板上的聚合物膜在反向刷子几何形状中通过超快速激光脉冲处理时，表面润湿性降低。我们提出，通过底物进行反刷子将化学变化限制在聚合物膜表面下方，从而使表面发泡但化学完整。为了证实这一假设，我们测量了用聚焦离子束观察到聚合物的相对对比。我们在聚合物 - 夸脱界面上观察到一个空隙，该界面是由于超快激光诱导的血浆的膨胀而产生的。修饰的聚合物层围绕着空隙，但否则膜似乎没有修饰。我们还使用X射线光电子光谱法来确认表面没有化学变化。当用部分重叠的水泡构图时，我们的聚合物表面显示出疏水性的增加。反向释放表面的疏水性增加只能由形态变化导致。这与聚合物表面的化学和形态变化形成对比，由前截至几何形状引起。
We report a decreased surface wettability when polymer films on a glass substrate are treated by ultra-fast laser pulses in a back-illumination geometry. We propose that back-illumination through the substrate confines chemical changes beneath the surface of polymer films, leaving the surface blistered but chemically intact. To confirm this hypothesis, we measure the phase contrast of the polymer when observed with a focused ion beam. We observe a void at the polymer-quartz interface that results from the expansion of an ultrafast laser-induced plasma. A modified polymer layer surrounds the void, but otherwise the film seems unmodified. We also use X-ray photoelectron spectroscopy to confirm that there is no chemical change to the surface. When patterned with partially overlapping blisters, our polymer surface shows increased hydrophobicity. The increased hydrophobicity of back-illuminated surfaces can only result from the morphological change. This contrasts with the combined chemical and morphological changes of the polymer surface caused by a front-illumination geometry.
