低成本

Abstract(#br)A low-cost antireflection (AR) coating of polydimethylsiloxane (PDMS) with wrinkle surface structure is demonstrated. The surface modulations with controllable amplitude and period are experimentally performed by plasma surface oxidation of a pre-stretched PDMS followed by removal of the applied mechanical strain. The period and the aspect ratio of the PDMS wrinkle are dependent on plasma treatment time in the process of surface modification.

Abstract(#br)Despite that microfluidic paper-based analytical devices (μPADs) provide effective analytical platforms for point-of-care diagnosis in resource-limited areas, it remains challenging to achieve simple and low-cost fabrication of μPADs. A novel method for fabrication of μPADs is developed in this study using a folded polydimethylsiloxane (PDMS)-coated paper mask with a specific pattern to form a sandwich structure with inserted chromatographic paper. PDMS penetrates the target paper from the front and the back sides, and then is cured in the target paper to form legible channels.

本研究介绍了用于飞机结构和聚合物复合材料的快速制造( 4 ~ 5 h )垂直排列碳纳米管/聚二甲基硅氧烷( VACNT / PDMS )可拉伸传感器。采用樟脑和二茂铁前驱体的热CVD法制备的VACNT生长形成了致密均匀的CNT结构，具有许多超过任何电阻隧穿现象的欧姆导电通路。广泛的交流/直流压阻特性研究表明，欧姆导电。VACNTs / PDMS传感器在20 %应变下呈现较高的线性度( r2 = 0.99 )，直流测量时平均规整因子为3.28，铜端电沉积引起的电阻变化较小( 0.052 % )。一个重要的特点是与传统的引伸计设备兼容的电阻值。直流应变片因数比传统的金属应变片高60 %，允许在更宽的应变范围内测量。

近年来，一种利用开放存取资源进行实验室研究的趋势已经开始。科学硬件的开源设计策略依赖于使用广泛可用的部件，特别是那些可以直接打印的部件，使用可与低成本微控制器连接的可加性制造技术和电子元件。开源软件消除了昂贵商业许可证的需要，提供了针对特定需求设计程序的机会。本综述对化学分离领域内的“开源运动”的影响进行了描述，主要是通过对近5年来该领域的研究进行全面的考察。涵盖的主题包括一般实验室设备、样品制备技术、基于分离的分析、检测策略、电子系统控制和数据处理软件。还讨论了在这些与分离有关的专题中继续存在的障碍和进一步采用开源办法的可能机会。