Navigation Links
Freedom of assembly
Date:4/19/2013

LEMONT, Ill. (Apr. 19, 2013) In a new study performed at the Center for Nanoscale Materials at the U.S. Department of Energy's (DOE) Argonne National Laboratory, researchers have for the first time seen the self-assembly of nanoparticle chains in situ, that is, in place as it occurs in real-time.

The scientists exposed a tiny liquid "cell" or pouch that contained gold nanoparticles covered with a positively charged coating to an intense beam of electrons generated with a transmission electron microscope. Some of the electrons that penetrated the outside of the cell became trapped in the fluid medium in the cell. These "hydrated" electrons attracted the positively charged nanoparticles, which in time reduced the intensity of charge of the positive coating.

As the hydrated electrons reduced the coating's positive charge, the nanoparticles no longer repelled each other as strongly. Instead, their newfound relative attraction led the nanoparticles to "jump around" and eventually stick together in long chains. This self-assembly of nanoparticle chains had been detected before in different studies, but this technique allowed researchers, for the first time, to observe the phenomenon as it occurred.

"The moment-to-moment behavior of nanoparticles is something that's not yet entirely understood by the scientific community," said Argonne nanoscientist Yuzi Liu, the study's lead author. "The potential of nanoparticles in all sorts of different applications and devices from tiny machines to harvesters of new sources of energy requires us to bring all of our resources to bear to look at how they function on the most basic physical levels."

Self-assembly is particularly interesting to scientists because it could lead to new materials that could be used to develop new, energy-relevant technologies. "When we look at self-assembly, we're looking to use nature as a springboard into man-made materials," said Argonne nanoscientist Tijana Rajh, who directed the group that carried out the study.

Because the particles under study were so tiny just a few dozen nanometers in diameter an optical microscope would not have been able to resolve, or see, individual nanoparticles. By using the liquid cell in the transmission electron microscope at the Center for Nanoscale Materials, Liu and his colleagues could create short movies showing the quick movement of the nanoparticles as their coatings contacted the hydrated electrons.

The study, titled In Situ Visualization of Self-Assembly of Charged Gold Nanoparticles, was published online in the Journal of the American Chemical Society. Funding for the research was provided by the U.S. Department of Energy's Office of Science.


'/>"/>

Contact: Jared Sagoff
jsagoff@anl.gov
630-252-5549
DOE/Argonne National Laboratory
Source:Eurekalert

Related biology technology :

1. Slovenias 1st Total Artificial Heart Patient Discharged from UMC Ljubljana Using the Freedom® Portable Driver
2. Northwest Bio Reaffirms Its Freedom to Operate; Refutes Other Parties Misleading Patent Assertions
3. AGSES - Your Key to Online Freedom
4. Assemblyman Levine Presents Resolution Recognizing Rare Disease Day at Capitol
5. Assembly not required
6. New England Biolabs Signs Agreement with Synthetic Genomics Inc. to Launch Gibson Assembly™ Master Mix for Molecular and Synthetic Biology Applications
7. GeneTex Antibody Company to Launch New Line of Primary Antibodies for the Study of Spindle Assembly
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:1/24/2017)... ... January 24, 2017 , ... ... Health PRM, a chronic disease and transitions of care solution for use by ... staff to work at the top of their license. Care teams, care ...
(Date:1/24/2017)... , Jan. 24, 2017   Bracket , ... today announced the addition of Jennifer Peters ... Vice President and General Manager for the Scientific Services ... for Bracket,s work in Rater Training, Quality Assurance, and ... with a strong skillset and demonstrated record building technology-based ...
(Date:1/24/2017)... ... January 24, 2017 , ... ... and increased serum leptin levels had a positive association with increased prostate growth ... published in the International Neurourology Journal involved 571 Korean men who underwent ...
(Date:1/24/2017)... ... 2017 , ... The Foundation for Food and Agriculture Research, ... career nominees for the 2017 New Innovator in Food and Agriculture Research Award. ... in which one in nine people suffers from hunger. The Foundation for Food ...
Breaking Biology Technology:
(Date:1/13/2017)... 13, 2017 Sandata Technologies, LLC, a ... homecare industry, including Electronic Visit Verification™ (EVV™), announced ... Jugs, as Senior Vice President of Product Management. ... of homecare experience to Sandata, where he will ... to align Sandata,s suite of solutions with the ...
(Date:1/11/2017)... 11, 2017 Intoxalock, a leading ignition interlock ... of its patent-pending calibration device. With this new technology, ... securely upload data logs and process repairs at service ... "Fighting drunk driving through the application of cutting-edge ... large, but also for the customer who can get ...
(Date:1/6/2017)... , Jan. 5, 2017  Delta ID Inc., a ... scanning technology for automotive at CES® 2017. Delta ID ... ) to demonstrate the use of iris scanning as ... authenticate the driver in a car, and as a ... driving experience. Delta ID and Gentex will ...
Breaking Biology News(10 mins):