Complex three-dimensional high aspect ratio microfluidic network manufactured in combined PerMX dry-resist and SU-8 technology

In this paper we present a new fabrication method that combines for the first time popular SU-8 technology and PerMX dry-photoresist lamination for the manufacturing of high aspect ratio three-dimensional multi-level microfluidic networks. The potential of this approach, which further benefits from wafer-level manufacturing and accurate alignment of fluidic levels, is demonstrated by a highly integrated three-level microfluidic chip. The hereby achieved network complexity, including 24 fluidic vias and 16 crossing points of three individual microchannels on less than 13 mm(2) chip area, is unique for SU-8 based fluidic networks. We further report on excellent process compatibility between SU-8 and PerMX dry-photoresist which results in high interlayer adhesion strength. The tight pressure sealing of a fluidic channel (0.5 MPa for 1 h) is demonstrated for 150 μm narrow SU-8/PerMX bonding interfaces.     

Preface to special topic: surface modification, wetting, and biological interfaces (guest editors: john ralston and jingfang zhou)

This Special Topic section of Biomicrofluidics on "Surface Modification, Wetting, and Biological Interfaces," is discussed. The topic is very timely and one that is tremendously relevant to the microfluidics and nanofluidics community.     

提高汽车的燃料效率

蓄电池和燃料电池是解决问题的唯一途径吗？事实上，改进常规内燃驱动汽车的设计，就能使空气较为洁净并减少石油进口。     

尼尔斯·玻尔的生活和工作概述

一位曾和尼尔斯·玻尔一起工作过、并一直在接近于玻尔感兴趣的领域内工作的丹麦物理学家,以亲切回忆的方式系统地叙述了玻尔开创性工作的进展。玻尔及其为数不多的学生与合作者,就是以这项工作奠定了现代量子物理学的基础。     

动物的早期进化

“那辆卡车里有两则对称动物”，当我们看见卡车消失在公路拐弯处的时候，Jun-Yuan Chen这样说首。Chen是中国科学院南京地质古生物研究所的古生物学家，他和我以及当时在南加州大学的同事Stephen Q.Dombos 刚刚从中国贵州省一个有5.8亿-6.0亿年历史的地层中收集了一大卡车黑色岩石。Chen坚信这些岩石里面蕴藏了重要的信息。