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:2/8/2017)... 2017  Aware, Inc. (NASDAQ: AWRE ), a ... results for its quarter and year ended December 31, 2016. ... was $3.9 million compared to $6.9 million in the same ... 2016 was $0.6 million compared to $2.6 million in the ... of 2016 was $0.5 million, or $0.02 per diluted share, ...
(Date:2/7/2017)... Ind. , Feb. 7, 2017 Zimmer ... leader in musculoskeletal healthcare, will present at the LEERINK ... New York Palace Hotel on Wednesday, February 15, 2017 ... live webcast of the presentation can be accessed at ... replay following the conference via Zimmer Biomet,s Investor Relations ...
(Date:2/2/2017)... Feb. 2, 2017   TapImmune, Inc. ... company specializing in the development of innovative peptide ... of cancer and metastatic disease, announced today it ... manufacturing of a second clinical lot of TPIV ... receptor alpha. The manufactured vaccine product will be ...
Breaking Biology News(10 mins):
(Date:2/22/2017)... ... February 22, 2017 , ... ProMIS Neurosciences (“ProMIS” or the ... diseases, today announced it has issued a scientific white paper entitled “Results from ... series of commentaries from ProMIS’s scientific team offering insight into the Company’s product ...
(Date:2/22/2017)... Origin (Origin Agritech, LLC, a subsidiary of Origin Agritech ... Arcadia (Arcadia Biosciences, Inc., NASDAQ: RKDA), a ... productivity traits and nutritional products, today announced their collaboration to achieve ... China to the United States ... ...
(Date:2/22/2017)... and SAN DIEGO , Feb. ... "Company") (OTCQB:CELZ) announced today expansion of its translational ... cell product through establishment of laboratory facilities in ... at the San Diego BioLabs facility, a biotechnology ... Novartis, and Sanofi. In November 2016, ...
(Date:2/21/2017)... ... February 21, 2017 , ... During HIMSS 2017, ... health applications, announced a partnership with Redox, a leader in cloud-based healthcare integration ... clinical systems while keeping data secure in the cloud. , The digital health ...
Breaking Biology Technology:
Cached News: