Skip to Main Content
The Physics of Microdroplets
book

The Physics of Microdroplets

by Jean Berthier, Ken Brakke
May 2012
Intermediate to advanced content levelIntermediate to advanced
392 pages
10h 53m
English
Wiley-Scrivener
Content preview from The Physics of Microdroplets

Chapter 8

Open Microfluidics

8.1 Abstract

Historically, microfluidics was a mere size reduction of well-established laminar macrofluidics. Microflows were confined inside solid wall channels and moved by pumps or syringes. Progressively new ways of doing microfluidics have emerged. Digital and droplet microfluidics are two techniques that have the advantage of confining targets such as biological objects of interest inside droplets of picoliter to nanoliter volumes. Recently, with the improving knowledge of capillary forces, it has been found that it is not always a necessity that microflows be confined between solid walls. Hydrophilic rails [1] or posts [2] could be sufficient to guide a micro flow. The main advantage is to have direct access to the flowing liquid. The second advantage is the large liquid-gas surface area. This type of microfluidics is usually called “open microfluidics” or sometimes “virtual walls microfluidics”, or HCMs for “hydrodynamically confined micro-flows.” Open microfluidic systems are now common in nanotechnology, biotechnology, fuel cells, and space technology [3–5].

From a general point of view, open microfluidics is a general designation for liquids having one interface with air (fig. 8.1). There is a wide diversity in this family. It encompasses droplets pierced by wires [6], liquid bridges, and liquid spreading between rails and inside grooves [1]. Still more recently, new concepts have emerged, such as paper-based microfluidics – where liquid ...

Become an O’Reilly member and get unlimited access to this title plus top books and audiobooks from O’Reilly and nearly 200 top publishers, thousands of courses curated by job role, 150+ live events each month,
and much more.
Start your free trial

You might also like

Micro-Drops and Digital Microfluidics

Micro-Drops and Digital Microfluidics

Jean Berthier
Bioinspired Materials Science and Engineering

Bioinspired Materials Science and Engineering

Guang Yang, Lin Xiao, Lallepak Lamboni
Open-Space Microfluidics

Open-Space Microfluidics

Emmanuel Delamarche, Govind V. Kaigala
Intelligent Transport Systems

Intelligent Transport Systems

Asier Perallos, Unai Hernandez-Jayo, Enrique Onieva, Ignacio Julio García Zuazola

Publisher Resources

ISBN: 9781118401330Purchase book