Navigation Links
Using snail teeth to improve solar cells and batteries
Date:1/16/2013

RIVERSIDE, Calif. (www.ucr.edu) An assistant professor at the University of California, Riverside's Bourns College of Engineering is using the teeth of a marine snail found off the coast of California to create less costly and more efficient nanoscale materials to improve solar cells and lithium-ion batteries.

The most recent findings by David Kisailus, an assistant professor of chemical and environmental engineering, details how the teeth of chiton grow. The paper was published today (Jan. 16) in the journal Advanced Functional Materials. It was co-authored by several of his current and former students and scientists at Harvard University in Cambridge Mass., Chapman University in Orange, Calif. and Brookhaven National Laboratory in Upton, NY.

The paper is focused on the gumboot chiton, the largest type of chiton, which can be up to a foot-long. They are found along the shores of the Pacific Ocean from central California to Alaska. They have a leathery upper skin, which is usually reddish-brown and occasionally orange, leading some to give it the nickname "wandering meatloaf."

Over time, chitons have evolved to eat algae growing on and within rocks using a specialized rasping organ called a radula, a conveyer belt-like structure in the mouth that contains 70 to 80 parallel rows of teeth. During the feeding process, the first few rows of the teeth are used to grind rock to get to the algae. They become worn, but new teeth are continuously produced and enter the "wear zone" at the same rate as teeth are shed.

Kisailus, who uses nature as inspiration to design next generation engineering products and materials, started studying chitons five years ago because he was interested in abrasion and impact-resistant materials. He has previously determined that the chiton teeth contain the hardest biomineral known on Earth, magnetite, which is the key mineral that not only makes the tooth hard, but also magnetic.

In the just-published paper, "Phase transformations and structural developments in the radular teeth of Cryptochiton stelleri," Kisailus set out to determine how the hard and magnetic outer region of the tooth forms.

His work revealed this occurs in three steps. Initially, hydrated iron oxide (ferrihydrite) crystals nucleate on a fiber-like chitinous (complex sugar) organic template. These nanocrystalline ferrihydrite particles convert to a magnetic iron oxide (magnetite) through a solid-state transformation. Finally, the magnetite particles grow along these organic fibers, yielding parallel rods within the mature teeth that make them so hard and tough.

"Incredibly, all of this occurs at room temperature and under environmentally benign conditions," Kisailus said. "This makes it appealing to utilize similar strategies to make nanomaterials in a cost-effective manner."

Kisailus is using the lessons learned from this biomineralization pathway as inspiration in his lab to guide the growth of minerals used in solar cells and lithium-ion batteries. By controlling the crystal size, shape and orientation of engineering nanomaterials, he believes he can build materials that will allow the solar cells and lithium-ion batteries to operate more efficiently. In other words, the solar cells will be able to capture a greater percentage of sunlight and convert it to electricity more efficiently and the lithium-ion batteries could need significantly less time to recharge.

Using the chiton teeth model has another advantage: engineering nanocrystals can be grown at significantly lower temperatures, which means significantly lower production costs.

While Kisailus is focused on solar cells and lithium-ion batteries, the same techniques could be used to develop everything from materials for car and airplane frames to abrasion resistant clothing. In addition, understanding the formation and properties of the chiton teeth could help to create better design parameters for better oil drills and dental drill bits.


'/>"/>
Contact: Sean Nealon
sean.nealon@ucr.edu
951-827-1287
University of California - Riverside
Source:Eurekalert

Related biology news :

1. Studies reveal structure of EV71, a virus causing childhood illnesses
2. BYU study: Using a gun in bear encounters doesnt make you safer
3. The shape of things to come: NIST probes the promise of nanomanufacturing using DNA origami
4. Beyond the microscope: Identifying specific cancers using molecular analysis
5. Cell therapy using patients own bone marrow may present option for heart disease
6. Using cell phones to detect harmful airborne substances
7. Disarming disease-causing bacteria
8. Notre Dame researchers using novel method to combat malaria drug resistance
9. High-resolution atomic imaging of specimens in liquid by TEM using graphene liquid cell
10. What is really causing the child obesity epidemic?
11. Better housing conditions for zebrafish could improve research results
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:3/23/2017)... 23, 2017 Research and Markets has announced ... & Trends - Industry Forecast to 2025" report to their ... The ... CAGR of around 8.8% over the next decade to reach approximately ... the market estimates and forecasts for all the given segments on ...
(Date:3/20/2017)... -- PMD Healthcare announces the release of its new ... (WMS), a remote, real-time lung health monitoring and management ... a Medical Device, Digital Health, and Chronic Care Management ... solutions that empower people to improve their healthcare and ... the first ever personal spirometer, Spiro PD, which was ...
(Date:3/7/2017)... 2017 Brandwatch , the leading social intelligence company, ... Trust to uncover insights to support its reporting, help direct ... The UK,s leading youth charity will be using Brandwatch Analytics social ... a better understanding of the topics and issues that are a ... ...
Breaking Biology News(10 mins):
(Date:3/24/2017)... Research and Markets has announced the addition of the ... Report" report to their offering. ... This report analyzes the Global market for ... and forecasts are provided for the period 2014 through 2022. Market ... The report profiles 25 companies including many key and ...
(Date:3/24/2017)... VILLAGE, Calif. , March 24, 2017   ... dermatology and aesthetics company, today announced that Richard ... Officer, effective March 24.   Peterson, who brings ... succeed John Smither , who is retiring at ... Sienna in an advisory capacity. Peterson joins Sienna from ...
(Date:3/23/2017)... ... 2017 , ... Lajollacooks4u is proud to announce it has become the premiere team-building cooking event ... companies around the world, such as Illumina, HP and Qualcomm, and is ranked #1 in ... popularity is due to its new team building format, a way for teams to not ...
(Date:3/23/2017)... , March 23, 2017  SeraCare ... to global in vitro diagnostics manufacturers and ... the industry,s first multiplexed Inherited Cancer ... testing by next-generation sequencing (NGS). The Seraseq™ ... developed with input from industry experts to ...
Breaking Biology Technology: