Can I read Passive Valves Based on Hydrophobic Microfluidics on EtoBox?

Passive Valves Based on Hydrophobic Microfluidics by Yanying Feng; Zhaoying Zhou; Xiongying Ye; Jijun Xiong is a Engineering article available to read on EtoBox.

What is Passive Valves Based on Hydrophobic Microfluidics about?

Fluid-surface interactions can become dominant in microfluidics, which is a central technology in a number of miniaturized systems for chemical, biological and medical applications. In this paper, two kinds of hydrophobic valves in microfluidic applications were presented. One is based on special geometrical designs and chemical modification for silicon dioxide and glass microchannels. Silicon dioxide and Pyrex glass surfaces, which are hydrophilic originally, are modified with octadecyltrichlorosilane (OTS) self-assembled monolayers (SAMs) to be hydrophobic, with the contact angles up to ∼102 and 103 • , respectively, for water. The formation of OTS SAMs takes <5 min. The OTS SAMs based stop valve can function well to enable stopping the flow of a liquid inside a microchannel in both directions. Tested for deionized water, the hydrophobic valve blocked successfully the liquid for many consecutive times and yielded pressure barrier up to ∼490 Pa, which is near to the theoretical prediction. The OTS SAMs, therefore the hydrophobic valve function, can be retained in a suitable environment for a long time and can rebirth conveniently when destroyed. The other kind of hydrophobic valve

Who reads Passive Valves Based on Hydrophobic Microfluidics?

Author

Yanying Feng; Zhaoying Zhou; Xiongying Ye; Jijun Xiong

Publisher

Elsevier Science; Elsevier ; Elsevier BV (ISSN 0924-4247)

Published

2003

Language

EN

Field

Engineering (Physical Sciences)