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 Assemblyâ„¢ 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:3/24/2017)... YORK , March 24, 2017 ... ended the trading session at 5,817.69, down 0.07%; the ... at 20,656.58; and the S&P 500 closed at 2,345.96, ... as 4 sectors closed in green, 4 sectors finished ... day. This Friday, Stock-Callers.com has initiated reports coverage on ...
(Date:3/23/2017)... ... 2017 , ... AxioMed president, Jake Lubinski, describes the AxioMed ... deformed, which is identical to how the human discs work to distribute force. ... to its natural state along a hysteresis curve, exactly like a healthy human ...
(Date:3/23/2017)... 2017  Northwest Biotherapeutics (OTCQB: NWBO) (NW Bio), ... for solid tumor cancers, today announced that yesterday ... announced last Friday, March 17, 2017. ... securities totaling 28,843,692 shares, comprised of 18,843,692 common ... of Class C Warrants pre-funded at the closing ...
(Date:3/23/2017)... PARK, Calif., March 23, 2017  BioPharmX Corporation ... products for the dermatology market, today reported financial ... 31, 2017, and will provide an update on ... the year. "We are pleased to ... year for BioPharmX," said President Anja Krammer. "We ...
Breaking Biology Technology:
(Date:3/9/2017)... MELBOURNE , Australia , March ... clinical study data at the prestigious World Lung Imaging ... Dr. Andreas Fouras , was invited to deliver ... and pulmonary medicine. This globally recognised event brings together ... and share the latest developments in lung imaging. ...
(Date:3/7/2017)... Brandwatch , the leading social intelligence company, today announces that it ... insights to support its reporting, help direct future campaigns, and share ... charity will be using Brandwatch Analytics social listening and analytics technology ... the topics and issues that are a priority for its supporters. ... "Until recently we,ve ...
(Date:3/6/2017)... 6, 2017 Mintigo , the ... announced Predictive Sales Coach TM , its new ... intelligence into Salesforce. This unique AI application will ... organizations with deep knowledge of their customers and ... engagement. Predictive Sales Coach extends Mintigo,s existing customer ...
Breaking Biology News(10 mins):