HOME >> BIOLOGY >> NEWS
The seashell's inner beauty

ARLINGTON, Va. -- There is more to mother-of-pearl than good looks. Also called nacre, the gleaming, white material is renowned in scientific circles for its strong, yet flexible, properties. Now researchers have developed a nanoscale, layered material that comes close to nacre's properties, including its iridescence. The ability to nanomanufacture artificial nacre may provide lightweight, rigid composites for aircraft parts, artificial bone and other applications.

Reporting online in Nature Materials on May 25, Nicholas Kotov and his colleagues at Oklahoma State University and at Digital Instruments/Veeco describe their method for creating nacre-like material that consists of alternating layers of clay and a type of polymer called a polyelectrolyte. Kotov received a National Science Foundation (NSF) CAREER Award to pursue the work.

"The discovery allows researchers to tailor flexible materials to a given application--to get the tough materials that nature has been able to produce," said Lynn Schneemeyer, the NSF program officer who oversees Kotov's award. NSF is an independent federal agency that supports fundamental research and education across all fields of science and engineering.

Natural nacre owes much of its strength and flexibility to an internal brick-like structure. Protein layers only nanometers (billionths of a meter) thick provide the pliable "mortar," while calcium carbonate, the principal chemical in limestone and antacids, comprises the similarly miniscule "bricks" adding hardness.

In the artificial nacre, platelets of a negatively-charged clay called montmorillonite provide the bricks while fibers of a positively-charged polyelectrolyte called poly(diallydimethylammonium) chloride (PDDA) serve as the mortar. The opposite charges help the two components bond tightly to form the nacre structure.

"The combination of montmorillonite and PDDA for nacre modeling came to us quite naturally," said Kotov
'"/>

Contact: Josh Chamot
jchamot@nsf.gov
703-292-7730
National Science Foundation
27-May-2003


Page: 1 2

Related biology news :

1. Secretary of Energy announces seven E.O. Lawrence Award Winners
2. Reducing allergens in the home helps inner-city children with asthma
3. Winner of 2004 EMBO Science Writing Prize announced
4. APS announces the winners of its 2004 postdoctoral fellowship in physiological genomics
5. Fox Chase Cancer Centers Alfred Knudson Jr. named 2004 Kyoto Prize winner
6. 2004 BP Conservation Programme winners pave the way for protecting wildlife
7. 2004 Wistar Institute Science Journalism Award winners announced
8. Spying on the inner life of a cell - new nanosensors a body can live with
9. Key gene identified for development of inner-ear structure required for balance
10. RNA inner workings partly unveiled in Stanford study
11. AGI announces the winners of Earth Science Week 2003 contests

Post Your Comments:
*Name:
*Comment:
*Email:
TAG: The seashell inner beauty

(Date:3/31/2015)... YORK , March 31, 2015   Guidepoint ... the launch of the Post-Surgical Pain Management TRACKER, part ... products tracking usage trends in the medical device and ... access to data including treatment volumes, market share, and ... the pain associated with joint surgery. The ...
(Date:3/24/2015)... and Markets ( http://www.researchandmarkets.com/research/hdgz7h/global_iris ) has announced ... 2015-2019" report to their offering. The ... at a CAGR of 23.5 percent over the period ... and the growth prospects of the Global Iris Recognition ... size, the report considers the revenue generated from sales ...
(Date:3/24/2015)... , March 24, 2015   Crossmatch ™, ... today announced that its U.are.U ® 4500 ... Goorin Bros . to achieve PCI compliance ... secures access to the POS terminal, protecting the ... of data breaches. With one-third ...
Breaking Biology News(10 mins):Guidepoint Launches Post-Surgical Pain Management TRACKER 2Guidepoint Launches Post-Surgical Pain Management TRACKER 3Global Iris Recognition Market 2015-2019 with 3M Cogent, Bioenable Technologies, Cross Match Technology, Iris ID Systems & Safran Dominating 2Crossmatch Fingerprint Readers Help Retailer Prevent Data Breaches at Point-of-Sale 2
(Date:4/21/2015)... RESEARCH TRIANGLE PARK, N.C. , April 21, 2015 ... announced today that it will release its first quarter ... 28, 2015. United Therapeutics will host a ... a.m. Eastern Time.  The teleconference is accessible by dialing ... the teleconference will be available for one week and ...
(Date:4/21/2015)... Whether it’s used for troubleshooting in a factory, ... Kessler CineDrive in a cinematic studio setting, or ... is designed to help any shooter create vivid high-speed ... the TS5-H offers the same convenient touchscreen controls and streamlined ... According to Tom Boldt for Fastec, “We believe that compelling ...
(Date:4/20/2015)... IL (PRWEB) April 20, 2015 ... of its 12th clinical research site: PMG Research of ... assumed operation of the clinical research department at ... outside the Southeast to a second region within the ... multi-specialty physician practice enhances PMG’s access to an additional ...
(Date:4/20/2015)... , April 20, 2015  Eli Lilly and Company ... from several targeted cancer therapies, reflecting Lilly,s diverse oncology ... Annual Meeting 2015, held April 18-22 in ... Discoveries to Patients" is the theme of this year,s ... commitment to broadening its portfolio of therapies that accelerate ...
Breaking Biology Technology:Fastec Imaging Releases the TS5-H High Definition High-Speed Camera 2Fastec Imaging Releases the TS5-H High Definition High-Speed Camera 3PMG Research Announces the Formation of its 12th Site in Champaign-Urbana, IL 2PMG Research Announces the Formation of its 12th Site in Champaign-Urbana, IL 3Lilly Releases Early-Stage Pipeline Data at AACR Annual Meeting 2015 2Lilly Releases Early-Stage Pipeline Data at AACR Annual Meeting 2015 3Lilly Releases Early-Stage Pipeline Data at AACR Annual Meeting 2015 4Lilly Releases Early-Stage Pipeline Data at AACR Annual Meeting 2015 5Lilly Releases Early-Stage Pipeline Data at AACR Annual Meeting 2015 6
Cached News: