Navigation Links
Iowa State, Ames Laboratory scientists advance the understanding of the big getting bigger
Date:11/4/2010

AMES, Iowa Patricia Thiel of Iowa State University and the Ames Laboratory put a box of tissues to the right, a stack of coasters to the middle and a trinket box to the left.

"Nature," she said of her table-top illustration, "doesn't want lots of little things." So Thiel grabbed the smaller things and slid them into a single pile next to the bigger tissue box. "Nature wants one big thing all together, like this."

Thiel, an Iowa State Distinguished Professor of Chemistry and a faculty scientist for the U.S. Department of Energy's Ames Laboratory, and James Evans, an Iowa State professor of physics and astronomy and a faculty scientist for the Ames Laboratory, describe that process in the Oct. 29 issue of the journal Science.

The paper, "A Little Chemistry Helps the Big Get Bigger," is in the journal's Perspectives section. It describes a process called coarsening. That's when "a group of objects of different sizes transforms into fewer objects with larger average size, such that 'the big get bigger,'" says the paper. Examples of the process include the geologic formation of gemstones, the degradation of pharmaceutical suspensions and the manufacture of structural steels.

Thiel and Evans were invited to write the paper after Thiel delivered a talk at an American Chemical Society meeting about their studies of coarsening, an emerging field in surface chemistry.

Thiel worked with Mingmin Shen, a former Iowa State doctoral student who is now a post-doctoral research associate at Pacific Northwest National Laboratory in Richland, Wash., on the experimental side of the coarsening research. Evans worked with Da-Jiang Liu, an associate scientist at the Ames Laboratory, on the theoretical side of the project.

The researchers, with the support of grants from the National Science Foundation, have been using scanning tunneling microscope technology an instrument that allows them to see individual atoms to study how coarsening happens on the surface of objects.

They've studied nanoscale particles grown on the surface of silver and how adding sulfur can increase coarsening. They're trying to learn the mechanism of that increase and understand the nature of the messengers that move atoms during the coarsening process.

What Thiel and Evans are looking for is a general principle that explains what they call additive-enhanced coarsening. To do that, Thiel said they still need to collect and analyze data from more coarsening systems.

Evans said a better understanding of the coarsening process can help researchers develop small structures including nanoscale technologies, catalysts or drug suspensions that resist coarsening and are therefore more durable. A better understanding could also help researchers manipulate coarsening to develop structures with a very narrow distribution of particle sizes, something important to some nanotechnologies.

"When we're building something on a small scale, for it to be useful, it has to be robust, it has to survive," Evans said. "And one thing we're looking at is the stability of the very tiny structures that are crucial to nanoscale technologies."


'/>"/>

Contact: Patricia Thiel
thiel@ameslab.gov
515-294-8985
Iowa State University
Source:Eurekalert  

Related biology technology :

1. Ascenta Therapeutics Announces Presentation of Promising Results From Clinical Trials of AT-101 in Prostate, Brain, and Lung Cancers at 2009 ASCO Annual Meeting
2. PerkinElmer Expertise and Solutions Integral to Food Safety Monitoring for the Beijing Games : Methods, Applications Expertise and Instrumentation Deployed in Mobile Laboratory
3. Instrumentation Laboratory Receives FDA Clearance to Expand the Intended Use of HemosIL(R) D-Dimer Assay
4. Waters Brings Advanced Laboratory Data Management to Microsofts BioIT Alliance
5. Sysmex Announces Clinical Laboratory Software Name Change
6. David H. Murdock Research Institute Taps Waters for Laboratory Technology
7. Instrumentation Laboratory Announces Passion & Results Awards Program
8. Laboratory Pumping Systems to Reach $3.1 Billion by 2012, According to New Report by Global Industry Analysts, Inc.
9. The Elmasonic S Ultrasonic Cleaner: Designed for the Scientific Laboratory
10. ICON Opens Full Service Central Laboratory in India
11. WuXi PharmaTech Will Focus U.S. Operations on Laboratory Testing Services
Post Your Comments:
*Name:
*Comment:
*Email:
Related Image:
Iowa State, Ames Laboratory scientists advance the understanding of the big getting bigger
(Date:12/5/2016)... 5, 2016  Renova™ Therapeutics, a biotechnology company ... and other chronic diseases, announced that Catherine ... Chief Financial Officer (CFO), effective today. ... of experience in financial management for a variety ... companies. Most recently, Ms. Bovenizer was the Vice ...
(Date:12/5/2016)... -- Research and Markets has announced the addition ... Markets and Companies" to their offering. ... , , ... genome variations, development of sequencing technologies, and their applications. Current ... developing them. Various applications of sequencing are described including those ...
(Date:12/4/2016)... , Dec. 3, 2016  In five studies ... Hematology (ASH) Annual Meeting and Exposition in ... engineering methods to improve the delivery of life-saving treatments ... new methods are designed to carry therapies directly to ... most, which could provide a substantial advantage over traditional, ...
(Date:12/2/2016)... NORWALK, Conn. , Dec. 2, 2016  The ... research presentations from the MMRF CoMMpass Study SM —the ... and accelerating precision medicine in multiple myeloma—will be presented ... (ASH) Annual Meeting & Exposition in San ... are helping to optimize treatment strategies, as well as ...
Breaking Biology Technology:
(Date:11/15/2016)... , Nov 15, 2016 Research and ... Global Forecast to 2021" report to their offering. ... ... USD 16.18 Billion by 2021 from USD 6.21 Billion in 2016, ... Growth of the bioinformatics market is driven by the ...
(Date:11/14/2016)... , Nov. 14, 2016  Based ... identification market, Frost & Sullivan recognizes FST ... Sullivan Award for Visionary Innovation Leadership. FST ... the biometric identification market by pioneering In ... solution for instant, seamless, and non-invasive verification. ...
(Date:6/22/2016)... BETHESDA, Md. , June 22, 2016  The American ... by Trade Show Executive Magazine as one of ... Summit on May 25-27 at the Bellagio in ... based on the highest percentage of growth in each of ... number of exhibiting companies and number of attendees. The 2015 ...
Breaking Biology News(10 mins):