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American Chemical Society's Weekly PressPac -- April 16, 2008
Date:4/21/2008

>Sustainability of Uranium Mining and Milling: Quantifying Resources and Eco-Efficiency

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http://dx.doi.org/10.1021/es702249v

CONTACT:
Gavin M. Mudd, Ph.D.
Monash University
Clayton, Australia 3800
Phone: +61 3 9905 1352
Fax: +61 3 9905 4944
Email: Gavin.Mudd@eng.monash.edu.au


ARTICLE # 4 FOR IMMEDIATE RELEASE

Chemists reproduce the roses petal effect
Langmuir

The lotus flower is natures slip n slide, where water beads skate along each petals surface like liquid metal. Now, chemists reveal the ying to the lotus frictionless yang: rose petals. Chemists have found the physical basis for the roses ability to grip water droplets in place, even when the flower is upside down. In a study scheduled for the April 15 issue of ACS Langmuir, a bi-weekly journal, this newly described petal effect could lead to unique new adhesive materials, coatings and fabrics.

The study of biological microstructures has been an lively area of research, particularly in the design of biomimetic materials. But before the petal effect could be replicated in synthetic materials, an in-depth understanding of the roses surface was needed.

Lin Feng and colleagues in China provide the first description of the microscale surface of roses, composed of arrays of tiny, fleshy projections called micropapillae. The micropapillae form a seal with water droplets, allowing them to cling to the surface of the rose petal. Using these new insights, Feng was able to create a synthetic rose petal surface with same properties.

The simple duplication of petal surface provides us not only a theoretical explanation of the phenomenon but also an inspiration for the preparation of biomimetic polymer films, which should be of great biological and technologica
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Contact: Michael Woods
m_woods@acs.org
202-972-4400
American Chemical Society
Source:Eurekalert  

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