Navigation Links
UMass Amherst polymer scientists jam nanoparticles, trapping liquids in useful shapes
Date:10/24/2013

AMHERST, Mass. Sharp observation by doctoral student Mengmeng Cui in Thomas Russell's polymer science and engineering laboratory at the University of Massachusetts Amherst recently led her to discover how to kinetically trap and control one liquid within another, locking and separating them in a stable system over long periods, with the ability to tailor and manipulate the shapes and flow characteristics of each.

Russell, her advisor, points out that the advance holds promise for a wide range of different applications including in drug delivery, biosensing, fluidics, photovoltaics, encapsulation and bicontinuous media for energy applications and separations media.

He says, "It's very, very neat. We've tricked the system into remaining absolutely fixed, trapped in a certain state for as long as we like. Now we can take a material and encapsulate it in a droplet in an unusual shape for a very long time. Any system where I can have co-continuous materials and I can do things independently in both oil and water is interesting and potentially valuable."

Cui, with Russell and his colleague, synthetic chemist Todd Emrick, report their findings in the current issue of Science.

Russell's lab has long been interested in jamming phenomena and kinetically trapped materials, he says. When Cui noticed something unusual in routine experiments, rather than ignore it and start again she decided to investigate further. "This discovery is really a tribute to Cui's observational skills," Russell notes, "that she recognized this could be of importance."

Specifically, the polymer scientists applied an electric field to a system with two liquids to overcome the weak force that stabilizes nanoparticle assemblies at interfaces. Under the influence of the external field, a spherical drop changes shape to an ellipsoid with increased surface area, so it has many more nanoparticles attached to its surface.

When the external field is released, the higher number of surface nanoparticles jam the liquid system, stopping nanoparticle movement like Friday afternoon gridlock on an exit ramp or sand grains stuck in an hourglass, Russell explains. In its jammed state, the nanoparticle-covered droplet retains its ellipsoid shape and still carries many more nanoparticles on its surface, disordered and liquid-like, than it could as a simple spherical drop. This new shape can be permanently fixed. Cui, Russell and Emrick also accomplished the jamming using a mechanical method, stirring.

By generating these jammed nanoparticle surfactants at interfaces, fluid drops of arbitrary shape and size can be stabilized opening applications in fluidics, encapsulation and bicontinuous media for energy applications. Further stabilization is realized by replacing monofunctional ligands with difunctional ones that cross-link the assemblies, the authors note. The ability to generate and stabilize liquids with a prescribed shape poses opportunities for reactive liquid systems, packaging, delivery and storage.


'/>"/>

Contact: Janet Lathrop
jlathrop@admin.umass.edu
413-545-0444
University of Massachusetts at Amherst
Source:Eurekalert

Related biology technology :

1. UMass Amherst polymer scientists, physicists develop new way to shape thin gel sheets
2. UMass Amherst, Harvard experts say better systems needed for medical device cybersecurity
3. Seahorse Bioscience Launches First Product from the Partnership with Baystate Medical Center and UMass Amherst
4. UMass Boston Receives $1 Million Grant to Recruit Urban Nurse Leaders
5. Sanofi Forms Partnership with UMass Boston with $1 Million Support of Student Success Program for STEM Education
6. New England Biolabs Introduces Polbase, an Information Repository of Scientific Data for Polymerase Researchers
7. Fabrication method can affect the use of block copolymer thin films
8. Bio-inspired polymer synthesis enhances structure control
9. DNA2.0 Patents Key Method for Synthesizing Bioplastic Polymer
10. Plasmonic chains act like polymers
11. New England Biolabs Develops Novel Polymerase with Ultra-High Fidelity and Minimal GC Bias
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:5/2/2016)... ... May 02, 2016 , ... Meister Media Worldwide launches its ... and added functionality give the agricultural world a taste of Meister Media Worldwide’s ... agriculture – from precision farming via satellites and Unmanned Aerial Vehicles (UAVs) to ...
(Date:4/29/2016)... ... 2016 , ... The MIT bioLogic design team has won multiple A' ... properties can be applied to fabric and formed into living interfaces between body and ... humidity change. The team harvested Natto cells and applied them to fabric with custom ...
(Date:4/29/2016)... New York , April 29, 2016 /PRNewswire/ ... report published by Transparency Market Research "Separation Systems ... Size, Share, Growth, Trends, and Forecast 2015 - ... was valued at US$ 10,665.5 Mn in 2014 ... of 6.8% from 2015 to 2023 to reach ...
(Date:4/29/2016)... ... April 29, 2016 , ... Intelligent Implant Systems announced today that the two-level ... sale in the United States. These components expand the capabilities of the system ... sales beginning in October of 2015, the company has seen significant sales growth in ...
Breaking Biology Technology:
(Date:3/18/2016)... , March 18, 2016 --> ... of Biometrics, ICT, Manned & Unmanned Vehicles, Physical infrastructure and ... security companies in the border security market and the continuing ... and Europe has led visiongain to ... improved success. --> defence & security companies ...
(Date:3/15/2016)... JERUSALEM , March 15, 2016 ... Jerusalem , the technology-transfer company of the Hebrew University, ... developer of remote sensing technology of various human biological ... funding, raising $2.0 million from private investors. ... technology, based on the detection of electromagnetic emissions from ...
(Date:3/11/2016)... -- http://www.apimages.com ) - --> http://www.apimages.com ) ... AP Images ( http://www.apimages.com ) - Germany ... the new refugee identity cards. DERMALOG will be unveiling this device, ... Hanover next week.   --> Germany ... produce the new refugee identity cards. DERMALOG will be unveiling this ...
Breaking Biology News(10 mins):