HOME >> BIOLOGY >> NEWS
Wetting Of Structured Or Imprinted Surfaces - Zooming Down Onto The Nanoscale

Wetting and dewetting phenenoma are all around us. The formation of rain droplets sitting on a plant leaf or hanging from a spiders web provide familiar examples for dewetting. On the other hand, the spreading of paint and adhesives on solid surfaces or the application of cosmetics onto the human skin rely on the wetting properties of these liquids. In fact, you could not read these lines without the tear films which wet your eyes and which are stabilized by the closure of your eyelids.

Now, imagine that we leave the macroscopic world and shrink the wetting structures to smaller and smaller length scales. Will we observe the same type of behavior as on the macroscopic scale? This question poses a general challenge to the science of colloids and interfaces. It is also of technological importance since our devices become smaller and smaller and their manufacture typically involves the processing of liquids.

Researchers at the Max Planck Institute of Colloids and Interfaces (Science, Vol. 282, 1 January 1999) have discovered new wetting phenomena at surfaces which are laterally structured on the micrometer scale. These surfaces contain hydrophilic and hydrophobic domains and, thus, have a position-dependent surface tension. This leads to 2-dimensional wettability patterns which act as templates for the 3-dimensional morphology of the liquid layers.

If the hydrophilic surface domains have the shape of long stripes, the liquid forms channels along those stripes. As one increases the volume of the liquid, these channels undergo a shape instability from a homogeneous channel state to another state with a single bulge. This instability is quite different from the classical Rayleigh-Plateau instability and represents a new type of wetting transition between two different morphologies of constant mean curvature. This latter transition can only occur because the contact angles of the channel do not satisfy the classical Young equation.

As far as applications ar
'"/>

Contact: Peter Lenz
lenz@mpikg-teltow.mpg.de
49-3328-46-588
Max-Planck-Gesellschaft
31-Dec-1998


Page: 1 2

Related biology news :

1. Imprinted gels hold promise for future medical devices
2. How Did Life Begin? Biochemical Evolution On Chemical Surfaces
3. Cellular Engineers Design Custom Cell Surfaces Able To Adhere To Synthetic Materials
4. Zooming liquid particles show technological promise
5. Nanoscale contact optimizes adhesion

Post Your Comments:
*Name:
*Comment:
*Email:


(Date:1/20/2016)... 2016   MedNet Solutions , an innovative SaaS-based ... clinical research, is pleased to announce the attainment of ... the result of the company,s laser focus on (and ... , it,s comprehensive, easy-to-use and highly affordable cloud-based technology ... Key MedNet growth achievements in 2015 include: ...
(Date:1/15/2016)... 2016 Recent publicized breaches in cyber security ... ways to ensure data security and user authentication in ... Android that ties a user,s mobile number ... a hardware authorization token. Customer service agents who employ ... their KodeKey enabled device to verify their identity.  Companies ...
(Date:1/11/2016)... , Jan. 11, 2016 Synaptics Incorporated (NASDAQ: ... solutions, today announced that its ClearPad ® TouchView ... products won two separate categories in the 8 th ... and Best Technology Breakthrough. The Synaptics ® TDDI ... simplified supply chain, thinner devices, brighter displays and borderless ...
Breaking Biology News(10 mins):
(Date:2/8/2016)... , February 8, 2016 ... Genetics" or the "Company"), the ultra-rapid Point-Of-Care (POC) molecular diagnostics ... Mark its Chlamydia trachomatis (CT) test to be launched on ... IVD Directive (98/79/EC), the CT test is now cleared for ... --> The launch of the io® CT test ...
(Date:2/5/2016)... 2016 ATCC, the premier global biological materials ... medical and life science researchers that are working to ... CDC website . --> ... is a single-stranded RNA virus of the Flaviviridae family, ... and Chikungunya Viruses. Zika virus is transmitted to humans ...
(Date:2/5/2016)... 5, 2016 Amarantus BioScience Holdings, ... focused on developing products for Regenerative Medicine, Neurology and ... Disease Designation (RPDD) from the US Food and Drug ... MANF was previously granted orphan drug designation (ODD) by ... Amarantus BioScience Holdings, Inc. (OTCQB: AMBS), ...
(Date:2/4/2016)... 2016 - New FDA action date of ... FDA action date of July 22, 2016   ... 22, 2016   - Lifitegrast has ... indicated for the treatment of signs and symptoms of dry eye ... potential to be the only product approved in the U.S. in the past decade indicated ...
Breaking Biology Technology:
Cached News: