Ordered Arrangement of Micro-beads in Single Line by Micromolding in Capillaries

An effective procedure was demonstrated to arrange spherical micro-beads into ordered, long, line-shape arrays by means of ＂micromolding in capillaries＂ in soft lithography. Polystyrene （PS） micro-beads with 2-3 mm of diameter were used as units and arranged by molding in continuous micro-channels formed by the conformal contact between a glass substrate and an elastomeric stamp with micrometer-scale line patterns on the surface. An aqueous emulsion of PS micro-beads filled these channels by capillary action and was allowed to solidify. The stamp was then removed. The PS micro-beads could be assembled into a string of long line-shape arrays, and the strings were then joined by heating them to their softening temperature. In order to separate the PS micro-bead string from the substrate, the glass was covered with a thin layer of A1 or polymethyl methacrylate. After the A1 layer was dissolved, the string of PS micro-beads would be released. A string of micrometer scale PS beads can be used as a simple and direct ＂model＂ of a real macromolecular chain. It is hopeful to show an analogue with the condensed process of real macromolecules in a mesoscopic scale using the ＂string of PS micro-beads＂.

海底光缆通用接续法

本文叙述了一种海底光缆通用接续方法。一种公共接头盒经设计能对光缆端部进行机械端接，为光纤及其接头提供安全的存放空间，并对电缆导体进行电气连接和电气绝缘。各类光缆专用的串接式套管组件放置在公共接头盒内，将光缆的所有必要构件固定，并使光纤免受机械应力。这一接续系统中不可缺少的部分是一组供接头装配用的设备，接头装配过程中包括光纤拼接、聚乙烯模塑和套管压人。该接续系统适用于轻型光缆和铠装型光缆。本文讨论了一种能证明接续系统是否满足各种工作要求的试验方法，并提供了试样的测试结果。