HOME >> BIOLOGY >> NEWS
From ink to optics, study of particle mixtures yields fundamental insights

Since the invention of ink over 3,000 years ago, people have exploited the unique properties of colloids, in which particles of one substance are suspended in another. Now, Princeton University chemical engineers have answered a fundamental question about these mixtures in work that may have wide-ranging practical applications, including the manufacturing of medicines and optical fibers.

Researchers have long tried to use computer simulations to determine the conditions under which colloids will exist in the solid, liquid and gas states -- knowledge that is necessary to capitalize fully on colloidal properties. Charting the freezing, melting and boiling points in "phase diagrams" has been difficult, however, because colloids contain an overwhelmingly large number of charged particles that attract and repel each other in very unusual ways. The problem was particularly difficult when the particles had very high static electric charges, which commonly occurs in practical situations.

Athanassios Panagiotopoulos, the Susan Dod Brown Professor of Chemical Engineering at Princeton, and postdoctoral research associate Antti-Pekka Hynninen overcame this hurdle by realizing that they could accurately represent the system with just one to four colloidal particles and their oppositely charged counterparts, called counterions. Their result -- a complete phase diagram that is correct even when the particles have very high electric charges -- was published as an "Editors' Selection" in the May 11 issue of the journal Physical Review Letters.

"This is the closure of a long-standing, fundamental problem in statistical mechanics," said Panagiotopoulos, who credits Hynninen with the "elegant and powerful idea" to consider only a very small part of the colloidal system.

With the newfound ability to calculate accurate phase diagrams, researchers may be able to improve the fabrication of artificial opal crystals -- colloids essential for high
'"/>

Contact: Hilary Parker
haparker@princeton.edu
609-258-4597
Princeton University, Engineering School
16-May-2007


Page: 1 2

Related biology news :

1. New study warns limited carbon market puts 20 percent of tropical forest at risk
2. Clones on task serve greater good, evolutionary study shows
3. Pollution causes 40 percent of deaths worldwide, study finds
4. A study by the MUHC and McGill University opens a new door to understanding cancer
5. New study suggests Concord grape juice may provide protection against breast cancer
6. Preclinical study links gene to brain aneurysm formation
7. In limiting life span, study finds booming bacteria innocent
8. Multicenter study nets new lung tumor-suppressor gene
9. MIT study: Maturity brings richer memories
10. Chickadee, nutchatch presence in conifers increases tree growth, says CU-Boulder study
11. Phase II study of therapeutic vaccine shows efficacy in patients with metastatic colorectal cancer

Post Your Comments:
*Name:
*Comment:
*Email:


(Date:3/29/2019)... , ... March 28, 2019 , ... ... (PT) programme, a new PT programme entirely dedicated to Chinese biobanks was launched ... and Environmental Repositories (ISBER) and the Biobank Branch, China Medicinal Biotech Association (BBCMBA). ...
(Date:3/27/2019)... ... March 26, 2019 , ... Evan Holden , a ... LLP , was a panelist at the National Academy of Sciences (NAS) Roundtable on ... Holden, a member of the firm’s award-winning Pharmaceutical, Medical Device & Health Care ...
(Date:3/25/2019)... VIEJO, Calif. (PRWEB) , ... March 25, 2019 ... ... (Ambry), and leading provider of clinical and research genetic testing, today announced a ... Ambry’s commitment to advancing precision medicine for cancer. Through this laboratory services ...
Breaking Biology News(10 mins):
(Date:3/27/2019)... ... 2019 , ... In honor of National Nutrition Month, Lajollacooks4u has collaborated with ... and good nutrition. This month, Chef Jodi Abel appeared on two segments on ... The first segment addressed the nutritional value of USDA’s MyPlate, a nutrition guide that ...
(Date:3/23/2019)... (PRWEB) , ... March 22, 2019 , ... ... sample collection, and analysis to a team of researchers at Nnamdi Azikiwe University ... by Dr. Nneka R. Agbokoba, PhD, of the Department of Medical Laboratory Sciences ...
(Date:3/19/2019)... ... ... The AACR annual conference pulls together a diverse group of clinical and laboratory ... Visikol team will be at the show at booth #3252 and will be highlighting ... digital pathology services . “For AACR this year we are highlighting specifically our immuno-oncology ...
(Date:3/19/2019)... , ... March 19, 2019 , ... Bogey was nine years old when he injured ... his left hip. These ailments caused Bogey to experience problems with his mobility. ... stairs, and onto his special spot on the couch. , His owners, devastated at the ...
Breaking Biology Technology:
Cached News: