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:6/15/2017)... ... June 15, 2017 , ... New resistant soybean ... options for managing Palmer amaranth and other broadleaf weeds resistant to glyphosate. But ... necessary. Auxin herbicides are known to drift and to cause harm to sensitive, ...
(Date:6/15/2017)... ... June 15, 2017 , ... The newest exhibition at ... through creative experimentation and interdisciplinary collaboration. Feature Creep, a solo exhibition by Maximillian ... reception will be held at EKG, located at 3600 Market Street in Philadelphia, ...
(Date:6/15/2017)... SEATTLE, Wash. (PRWEB) , ... June 15, 2017 ... ... Ph.D., global business director for DuPont Biofuels, will be speaking at Bloomberg’s ... PST. Koninckx will join other leading environmental and sustainability officials on a panel ...
(Date:6/14/2017)... , ... June 14, 2017 , ... ... 8th to discuss the initiative steered by the executive search firm, “Building Value ... of the Board of Directors of Foundation Medicine, led an open discussion with ...
Breaking Biology Technology:
(Date:6/14/2017)... , June 15, 2017  IBM (NYSE: IBM ) ... international tech event dedicated to developing collaboration between startups and ... on June 15-17. During the event, nine startups will showcase ... value in various industries. France ... the international market, with a 30 percent increase in the ...
(Date:4/24/2017)... WASHINGTON , April 24, 2017 ... counsel and partner with  Identity Strategy Partners, LLP ... "With or without President Trump,s March 6, ... Foreign Terrorist Entry , refugee vetting can be instilled ... refugee resettlement. (Right now, all refugee applications are ...
(Date:4/13/2017)... According to a new market research report "Consumer ... Administration, and Authorization), Service, Authentication Type, Deployment Mode, Vertical, and Region - ... to grow from USD 14.30 Billion in 2017 to USD 31.75 Billion ... ... MarketsandMarkets Logo ...
Breaking Biology News(10 mins):