Direct-write laser processing has been demonstrated to be capable of both surface patterning of micro- and nanoscale structures on polymer surfaces without significant modification of the surface chemistry or optical transmission of the laser processed area. In this work, the creation of microchannels via direct-write laser processing of 188 μm thickness cyclic olefin polymers is demonstrated, along with a route towards channel functionalization. Cyclic olefin polymers (COP) are an emerging class of polymers noted for their high chemical resistance, biocompatibility and higher optical transparency when compared to other common polymers. These properties make them excellent substrates for the fabrication of microfluidic devices. This paper presents the first investigation into infrared laser processing of COP using a 1064 nm Nd:YAG laser. Scanning electron microscopy and Raman spectroscopy were utilized to investigate the morphology and composition of these laser textured surfaces.\ud\udA route for functionalization of these substrates for chemical and biological speciation and separation was examined using carbon nanoparticles. The nanoparticles were produced using pulsed laser ablation in liquid (PLAL) which has been reported as a fast and adaptable method for nanoparticle production. The nanoparticles produced were using transmission electron microscopy while the coating of substrates with these CNPs was examined using SEM. These results are discussed in the context of development of a new route for achieving surfaces optimized for microfluidicbased separations and speciation.
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机译:已经证明直接写入激光加工能够在聚合物表面上对微米级和纳米级结构进行表面图案化,而不会显着改变激光加工区域的表面化学或光学透射率。在这项工作中,展示了通过对188μm厚度的环状烯烃聚合物进行直接写入激光处理来创建微通道,以及实现通道功能化的途径。环烯烃聚合物(COP)是新兴的一类聚合物,与其他普通聚合物相比,它们具有较高的耐化学性,生物相容性和较高的光学透明性。这些特性使它们成为制造微流体装置的极佳基材。本文介绍了使用1064 nm Nd:YAG激光对COP进行红外激光处理的首次研究。利用扫描电子显微镜和拉曼光谱研究了这些激光织构表面的形态和组成。\ ud \ ud使用碳纳米颗粒检查了这些底物的功能化途径,以进行化学和生物形态形成和分离。使用液体中的脉冲激光烧蚀(PLAL)来生产纳米颗粒,据报道这是一种快速且适用于纳米颗粒生产的方法。产生的纳米颗粒使用透射电子显微镜,同时使用SEM检查具有这些CNP的基材的涂层。这些结果将在开发新路线的背景下进行讨论,以实现针对基于微流体的分离和形态优化的表面。
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