Navigation Links
Fly eye paves the way for manufacturing biomimetic surfaces
Date:7/27/2010

Rows of tiny raised blowfly corneas may be the key to easy manufacturing of biomimetic surfaces, surfaces that mimic the properties of biological tissues, according to a team of Penn State researchers.

"Bioreplication began about 2001 or 2002," said Akhlesh Lakhtakia, Godfrey Binder Professor of Engineering Science and Mechanics. "All the techniques currently available are not conducive to mass replications. In many cases you can make as many replicas as you want, but you need an insect for each replication. This is not good for industrial purposes."

Lakhtakia, working with Drew Patrick Pulsifer, graduate student in engineering science and mechanics; Carlo G. Pantano, distinguished professor of materials science and engineering and director of Penn State's Materials Research Institute; and Ral Jos Martn-Palma, professor of applied physics, Universidad Autnomia de Madrid, Spain, developed a method to create macroscale molds or dies that retain nanoscale features.

"We needed an object large enough to manipulate that still had nanoscale features," said Lakhtakia.

The researchers chose blowfly eyes because they have potential application in the manufacture of solar cells. Blowflies have compound eyes that are roughly hemispherical; but within that half sphere, the surface is covered by macroscale hexagonal eyes with nanoscale features.

"These eyes are perfect for making solar cells because they would collect more sunlight from a larger area rather than just light that falls directly on a flat surface," said Lakhtakia.

However, in order to work in a manufactured product, the surface needs to retain the overall design in sufficient detail.

The researchers fixed the fly corneas on a glass substrate and filled the back of the corneas with polydimethylsiloxane, a silicone-based organic polymer, so that the metal covering they apply would not seep behind the eyes. They then deposited nickel on the surface using a modified form of the conformal-evaporated-film-by-rotation technique. In this technique, the researchers thermally evaporate the material that forms the coating in a vacuum chamber. The object receiving the coating is fixed to a holder and rotated about once every two seconds.

The researchers used arrays of nine blowfly eyes coated with 250 nanometers of nickel. This initial template was then electroformed -- a method of electroplating -- to deposit nickel on the back to create a master template half a millimeter thick. The thickness of the master template can be thicker.

"Polymer replicas produced . . . by casting did faithfully reproduce features of a few micrometers and larger in dimensions," the researchers reported in the online edition of Bioinspiration & Biomimetics.

The master template can be used either as a die to stamp the pattern or as a mold. The intention is to use the master die/mold to produce not only daughter dies/molds, but to tile the templates so that they can imprint large areas. The researchers will probably expand their template to include 30 blowfly corneas.

"One of the nice things about a conformal coating like this is, it becomes nanograined," said Lakhtakia. "The surface of the die becomes very smooth so the polymer will probably not stick."

Many biological surfaces exist that could create manufacture surfaces for a variety of applications. The researchers are currently looking at butterfly wings to understand how the surfaces create colors without pigment.

"Interestingly, the emerald ash borer, an insect that has recently become a problem in Pennsylvania, mates by color," said Lakhtakia. "Would lures made from templates of the ash borer skin attract males?"


'/>"/>

Contact: A'ndrea Elyse Messer
aem1@psu.edu
814-865-9481
Penn State
Source:Eurekalert  

Related biology news :

1. Study paves way for new biofuels models, technologies
2. Leicester research paves way for first use in Europe of an insect to fight invasive plant
3. Comprehensive genetic study paves way for new blood-pressure medicines
4. New discovery paves the way for new diagnosis of serious lung disease
5. Semiconductor Manufacturing International Corporation: Announcement of 2009 Annual Results
6. Manufacturing antibodies
7. Louisiana Techs Institute for Micromanufacturing to collaborate with colleagues in the arts
8. ExcellGene SA first company to offer contract manufacturing in 250 Liter OrbShake bioreactor
9. EPAs new green parking lot allows scientists to study permeable surfaces that may help the environment
10. NIST-Cornell team builds worlds first nanofluidic device with complex 3-D surfaces
Post Your Comments:
*Name:
*Comment:
*Email:
Related Image:
Fly eye paves the way for manufacturing biomimetic surfaces
(Date:3/31/2016)... , March 31, 2016  Genomics firm Nabsys ... founding CEO, Barrett Bready , M.D., who returned ... of the original technical leadership team, including Chief Technology ... of Product Development, Steve Nurnberg and Vice President of ... to the company. Dr. Bready served as ...
(Date:3/23/2016)... 2016 Einzigartige ... und Stimmerkennung mit Passwörtern     ... MESG ), ein führender Anbieter digitaler Kommunikationsdienste, ... SpeechPro zusammenarbeitet, um erstmals dessen Biometrietechnologie einzusetzen. ... Möglichkeit angeboten, im Rahmen mobiler Apps neben ...
(Date:3/22/2016)... , PROVO and ... Newborn Screening Ontario (NSO), which operates the highest sample ... molecular testing, and Tute Genomics and UNIConnect, leaders in ... respectively, today announced the launch of a project to ... (NGS) testing panel. NSO has been ...
Breaking Biology News(10 mins):
(Date:4/28/2016)... ... April 28, 2016 , ... Morris Midwest ( http://www.morrismidwest.com ), ... manufacturers at its Maple Grove, Minnesota technical center, May 11-12. The event ... Almost 20 leading suppliers of tooling, accessories, software and other related technology ...
(Date:4/27/2016)... ... April 27, 2016 , ... The Pittcon Organizing Committee ... Chuck has been a volunteer member of Committee since 1987. Since then, he ... of directors and treasurer and was chairman for both the program and exposition committees. ...
(Date:4/27/2016)... and RESEARCH TRIANGLE PARK, N.C. , ... UTHR ) announced today that Martine Rothblatt ... Therapeutics will provide an overview and update on the ... Annual Health Care Conference. The presentation will ... a.m. Eastern Time, and can be accessed via a ...
(Date:4/27/2016)... ... April 27, 2016 , ... PathSensors, Inc., a leading environmental ... Lamka will assist PathSensors in expanding the use of the company’s CANARY® technology ... test platform for the detection of harmful pathogens, including a number of bacteria, ...
Breaking Biology Technology: