CO2激光

A fast and low-cost microfabrication approach for six types of thermoplastic substrates with reduced feature size and minimized bulges using sacrificial layer assisted laser engraving

由 ty10086 提交于 周四, 08/26/2021 - 13:19
Abstract(#br)Since polydimethylsiloxane (PDMS) is notorious for its severe sorption to biological compounds and even nanoparticles, thermoplastics become a promising substrate for microdevices. Although CO 2 laser engraving is an efficient method for thermoplastic device fabrication, it accompanies with poor bonding issues due to severe bulging and large feature size determined by the diameter of laser beam.

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High contact surface area enhanced Al/PDMS triboelectric nanogenerator using novel overlapped microneedle arrays and its application to lighting and self-powered devices

由 ty10086 提交于 周四, 08/26/2021 - 12:47
摘要\n增强摩擦电纳米发电机( TENG )输出性能的一个关键是如何增加强烈依赖于特征形貌和模式密度的有效接触面积。传统的TENG形貌包括金字塔、立方体、线条、柱子和特征表面积不足的穹顶，通常采用昂贵而耗时的光刻和刻蚀工艺。在此，我们提出了一种新的高总接触表面积重叠微针( OL- MN )阵列形貌，以提高铝/聚二甲基硅氧烷( Al / PDMS ) TENG在低工作频率下的输出性能。比较研究了两种不同的低密度和高密度微针阵列，即LD- MN和HD- MN。采用低成本CO2激光烧蚀与PDMS铸造一体化工艺进行快速成型。在恒定的激光功率和扫描速度下，OL-MN与LD-MN和HD-MN相比，具有最高的总接触表面积。OL- MN- TENG的开路电压( Voc )和短路电流( I sc )的输出性能分别为123 V和109.7μA，分别是LD- MN- TENG的Voc和I sc的3.66和3.71倍。优秀的OL-MN-TENG可以在串联的103个LED上点亮，并在电容器中储存能量，用于各种自供电设备。

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A Facile Approach for Rapid Prototyping of Microneedle Molds, Microwells and Micro-Through-Holes in Various Substrate Materials Using CO2 Laser Drilling.

由 ty10086 提交于 周四, 08/26/2021 - 12:42
CO\u003csub\u003e2\u003c/sub\u003e laser manufacturing has served as an enabling and reliable tool for rapid and cost-effective microfabrication over the past few decades. While a wide range of industrial and biological applications have been studied, the choice of materials fabricated across various laser parameters and systems is often confounded by their complex combinations.

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