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:2/16/2017)... , February 16, 2017 ... infusion of innovative telemedicine application, new and leading ... are experiencing a boom worldwide. The healthcare sector ... of technologies, services and new therapies for companies ... (TSX-V: RHT), Cellectar Biosciences, Inc. (NASDAQ: ...
(Date:2/16/2017)... -- Champions Oncology, Inc. (NASDAQ: CSBR ), a ... technology solutions and products to personalize the development and ... new cohorts of PDX models to their existing TumorBank. ... product line in hepatocellular cancer, breast cancer, castrate resistant ... cell lung cancer (including EGFR mutation; ALK/ROS1 positive) PDX ...
(Date:2/16/2017)... 16, 2017  Rhythm, a biopharmaceutical company ... that result in life-threatening metabolic disorders, today ... mezzanine round of financing with existing investors ... New Enterprise Associates, Pfizer Venture Investments, Third ... investment fund. Rhythm will use the proceeds ...
(Date:2/15/2017)... ... ... Executive search firm, Slone Partners, announces the placement of ... a veteran life sciences and molecular diagnostics executive with extensive commercialization experience. ... risk in future generations. In his new role, Matt will be responsible for ...
Breaking Biology Technology:
(Date:2/13/2017)... 2017  RSA Conference -- RSA, a Dell Technologies ... to enhance fraud detection and investigation across digital ... Fraud & Risk Intelligence Suite. The new platform ... insights from internal and external sources as well ... customers from targeted cybercrime attacks. "Fraudsters ...
(Date:2/8/2017)... About Voice Recognition Biometrics Voice recognition biometrics ... a stored voiceprint template. Acoustic features of an ... are compared to distinguish between individual voices. Voice ... PCs already have a microphone and can authenticate ... are most likely to be deployed in telephone-based ...
(Date:2/8/2017)... 2017 Report Highlights The global ... $8.3 billion in 2016 at a compound annual growth ... Report Includes - An overview of the global market ... data from 2015 and 2016, and projections of compound ... the market on the basis of product type, source, ...
Breaking Biology News(10 mins):