Navigation Links
Open microfluidic and nanofluidic systems

aturized labs are appropriate microcompartments for the confinement of very small amounts of liquids and chemical reagents. Like the test-tubes in macroscopic laboratories, these microcompartments should have some basic properties: They should have a well-defined geometry by which one can measure the precise amount of liquid contained in them; they should be able to confine variable amounts of liquid; and they should be accessible in such a way that one can add and extract liquid in a convenient manner.

An appealing design principle for such microcompartments is based on open and, thus, directly accessible surface channels which can be fabricated on solid substrates using available photolithographic methods. The simplest channel geometry which can be produced in this way corresponds to channels with a rectangular cross section. The width and depth of these channels can be varied between a hundred nanometer and a couple of micrometer.

At first sight, it seems rather obvious to use such surface channels as microcompartments. However, if one actually tries to fill these channels with a certain liquid, one observes that the liquid often refuses to enter the channels. In fact, as shown in the new PNAS study, liquids at surface channels can attain a large variety of different wetting morphologies including localized droplets, extended filaments, and thin wedges at the lower channel corners. Examples for these morphologies as observed by atomic (or scanning) force microscopy (AFM) are shown in Figure 1.

When the AFM experiments were first performed, it was not known how to produce a certain liquid morphology since there was no systematic theory for the dependence of this morphology on the materials properties and on the channel design. Such a theory has now been developed. This theory addresses the strong capillary forces between substrate material and liquid and takes the ‘freedomâ€TM of contact angles at pinned contact lines into account. Such a
'"/>

Source:Max-Planck-Gesellschaft


Page: 1 2 3 4

Related biology news :

1. Scripps scientists find potential for catastrophic shifts in Pacific ecosystems
2. A new way to share models of biological systems
3. Motor transport in bio-nano systems
4. Nanoscale method for investigating living systems
5. Cookbook recipes would cure disease with nontoxic DNA delivery systems
6. Avian influenza virus in mammals spreads beyond the site of infection to other organ systems
7. Ocean acidification threatens cold-water coral ecosystems
8. Beaver dams create healthy downstream ecosystems
9. Killer B cells demonstrate evolutionary link between fish and mammal immune systems
10. Study warns deep-sea mining may pose serious threat to fragile marine ecosystems
11. Global survey of lizards reveals greater abundance of animals on islands than on mainland ecosystems
Post Your Comments:
*Name:
*Comment:
*Email:
TAG: Open microfluidic and nanofluidic systems

(Date:8/29/2014)... connections in transcription factor networks (TFNs) to evaluate the ... in PLOS Computational Biology in August. ... a network,s resilience against mutations. , "In simulations, ... models has a greater effect on robustness than varying ... Dov A. Pechenick, PhD, lead author and former researcher ...
(Date:8/29/2014)... twist them, fold them: modern materials that are light, ... as artificial skin or electronic paper. , Making such ... but a new way of working with copper nanowires ... , Previous success in the field of ultra-lightweight ... precious gold and silver nanowires. , By turning ...
(Date:8/28/2014)... study reports that an expansion of marine protected areas ... ecological functions. According to investigators from the Wildlife ... fish have focused on saving the largest numbers of ... provide key and difficult-to-replace ecological functions. , ... by fish species that also are food for millions ...
Breaking Biology News(10 mins):Assortativity signatures of transcription factor networks contribute to robustness 2Copper shines as flexible conductor 2Study finds marine protected areas inadequate for protecting fish and ocean ecology 2
... Infectious Diseases (NIAID), part of the National Institutes of ... to Tulane University for its ongoing efforts to treat ... that threatens hundreds of thousands of people annually in ... threat. The contract will include collaboration between Tulane; ...
... are going on a diet, while others have expanding ... rising temperatures due to global climate change, speculates Prof. ... who has been measuring the evolving body sizes of ... most extreme. , Changes are happening primarily in higher ...
... (February 5, 2010) New research from the Hood Center for ... first time sheds light on the significant potential negative impact ... on children. The study, which appears in the current ... of the "brand placements" for food, beverage, and food retail ...
Cached Biology News:Tulane receives $15 million NIH contract to develop vaccine and treatment for deadly fever 2Animals cope with climate change at the dinner table 2New study examines the impact on children of food product placements in the movies 2New study examines the impact on children of food product placements in the movies 3
(Date:8/28/2014)... new research platform uses a laser to ... undergoing stress and heating, an approach likely ... microelectronics and batteries., This new technique, called ... heating and the surface stress of microscale ... discussed the merits of surface-stress influence on ...
(Date:8/28/2014)... 2014  Next month, executives from clinical trial marketing firm ... beginning with Patient-Centered Clinical Trials 2014 , to be ... , September 4-5. Patient recruitment experts Bonnie A. ... will share insights on the benefits of employing an ... – from media to mobile apps – can be used ...
(Date:8/28/2014)... by a Florida State University research team has led ... temperature, emit white light, and convert photon energy directly ... a butterfly. , Biwu Ma, associate professor in the ... College of Engineering, created the molecule in a lab ... that his creation has many other unique capabilities. , ...
(Date:8/28/2014)... PrimeSource Building Products, Inc., a leading ... to support their communication needs with the ... conferencing platform GlobalMeet powered by SoundConnect. The solution ... SoundConnect delivers award winning “results driven” business class ... be utilizing GlobalMeet powered by SoundConnect ...
Breaking Biology Technology:New analytical technology reveals 'nanomechanical' surface traits 2New analytical technology reveals 'nanomechanical' surface traits 3BBK Worldwide Leads Sessions at Key September Events 2Novel 'butterfly' molecule could build new sensors, photoenergy conversion devices 2PrimeSource Chooses SoundConnect as Collaboration Provider 2
... tiny components on silicon wafers) has long enabled the ... number of transistors that can be squeezed into an ... compensating capabilities of plasma etching, Moore,s Law would have ... micron (the diameter of a human hair is approximately ...
... 2011 Bayer HealthCare,s affiliate MEDRAD, Inc. today ... demonstrated a 59 percent relative reduction in target ... patients with peripheral arterial disease (PAD) treated with ... compared to standard balloon angioplasty (POBA). Additionally, for ...
... /PRNewswire-Asia/ -- WuXi PharmaTech (Cayman) Inc. ... outsourcing company serving the pharmaceutical, biotechnology, and medical device industries, ... its financial results for the third quarter of 2011. ... Increased 24.0% Year Over Year to $104.0 Million ...
Cached Biology Technology:Plasma etching pushes the limits of a shrinking world 2Bayer HealthCare's Cotavance® Drug Eluting Balloon With Paccocath® Technology Reduced Five-Year Target Lesion Revascularization Rates by 59 Percent in PAD Patients Compared to Those Treated With Uncoated Balloon 2Bayer HealthCare's Cotavance® Drug Eluting Balloon With Paccocath® Technology Reduced Five-Year Target Lesion Revascularization Rates by 59 Percent in PAD Patients Compared to Those Treated With Uncoated Balloon 3Bayer HealthCare's Cotavance® Drug Eluting Balloon With Paccocath® Technology Reduced Five-Year Target Lesion Revascularization Rates by 59 Percent in PAD Patients Compared to Those Treated With Uncoated Balloon 4WuXi PharmaTech Announces Third-Quarter 2011 Results 2WuXi PharmaTech Announces Third-Quarter 2011 Results 3WuXi PharmaTech Announces Third-Quarter 2011 Results 4WuXi PharmaTech Announces Third-Quarter 2011 Results 5WuXi PharmaTech Announces Third-Quarter 2011 Results 6WuXi PharmaTech Announces Third-Quarter 2011 Results 7WuXi PharmaTech Announces Third-Quarter 2011 Results 8WuXi PharmaTech Announces Third-Quarter 2011 Results 9WuXi PharmaTech Announces Third-Quarter 2011 Results 10WuXi PharmaTech Announces Third-Quarter 2011 Results 11WuXi PharmaTech Announces Third-Quarter 2011 Results 12WuXi PharmaTech Announces Third-Quarter 2011 Results 13WuXi PharmaTech Announces Third-Quarter 2011 Results 14WuXi PharmaTech Announces Third-Quarter 2011 Results 15WuXi PharmaTech Announces Third-Quarter 2011 Results 16WuXi PharmaTech Announces Third-Quarter 2011 Results 17WuXi PharmaTech Announces Third-Quarter 2011 Results 18
Each 72-well MiniTray is low profile, with lid. Conical well shape, 10 l....
The E. coli Expression System with Gateway Technology is designed to create E. coli expression clones containing the T7 promoter. The expression clones are ready for transformation and expression in ...
...
For use with SSP products or any application requiring agarose gel separation • Multiple formats available to meet various throughput needs • Includes replacement parts for each un...
Biology Products: