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:8/1/2014)... of a new study, including two Simon Fraser ... industry representatives and policymakers must collaborate closely on ... gas development. Viorel Popescu and Maureen Ryan, David ... Sciences department, are among eight international co-authors of ... Ecology and the Environment . , Shale gas ...
(Date:7/31/2014)... AMHERST, Mass. A first-of-its-kind study of bigeye tuna ... Lutcavage, director of the Large Pelagics Research Center at ... that these fish cover a wide geographical range with ... shelf, and they favor a high-use area off Cape ... research, which used a new approach to study one ...
(Date:7/31/2014)... Latinos are the largest minority group in the United ... of Latinos are obese and are 1.2 times as ... , NYU College of Nursing student researcher Lauren Gerchow, ... factors that contribute to this problem by compiling a ... patterns in Latina women recently published in Nursing ...
Breaking Biology News(10 mins):Scientists warn time to stop drilling in the dark 2Scientists warn time to stop drilling in the dark 3Study of bigeye tuna in Northwest Atlantic uses new tracking methods 2Study of bigeye tuna in Northwest Atlantic uses new tracking methods 3NYU research looks to combat US Latina immigrant obesity 2
(Date:8/1/2014)... , Aug. 1, 2014 Research ... "The World Market for Flow Cytometry in ... http://photos.prnewswire.com/prnh/20130307/600769 ... are now an important component of advanced IVD ... instruments for cancer diagnostics, but their newer clinical ...
(Date:8/1/2014)... , Aug. 1. 2014 As one ... the 2014 AACC Annual Meeting & Clinical Lab Expo ... and patient care are introduced to the healthcare world. ... the Expo,s 650 exhibitors will include the latest diagnostic ... Advances in smartphones and biosensors have enabled the ...
(Date:8/1/2014)... , Aug. 1, 2014 One of the ... of personalized medicine, which is the practice of using ... to a patient,s individual biology. Personalized diagnostics—laboratory analyses that ... role in the lab,s future. This fall, AACC ... the latest science in this exciting field and the ...
(Date:8/1/2014)... , August 1, 2014 According ... Research "Biophotonics Market - Global Industry Analysis, Size, Share, ... was valued at USD 25.16 billion in 2013, which ... growing at a CAGR of 10.4% from 2014 to ... at  http://www.transparencymarketresearch.com/biophotonics-market.html Increasing demand for accurate ...
Breaking Biology Technology:The World Market for Flow Cytometry in IVD Applications 2Lab-on-a-Chip Technology to Be Featured at 2014 AACC Annual Meeting & Clinical Lab Expo 2Lab-on-a-Chip Technology to Be Featured at 2014 AACC Annual Meeting & Clinical Lab Expo 3First-Ever AACC Virtual Conference to Focus on Personalized Diagnostics 2Global Biophotonics Market is Expected to Reach USD 50.20 Billion in 2020: Transparency Market Research 2Global Biophotonics Market is Expected to Reach USD 50.20 Billion in 2020: Transparency Market Research 3Global Biophotonics Market is Expected to Reach USD 50.20 Billion in 2020: Transparency Market Research 4
Cached News: