Nanotechnology Now





Heifer International

Wikipedia Affiliate Button


DHgate

Home > Press > UMass Amherst polymer scientists jam nanoparticles, trapping liquids in useful shapes

Abstract:
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.

UMass Amherst polymer scientists jam nanoparticles, trapping liquids in useful shapes

Amherst, MA | Posted on October 24th, 2013

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.

####

For more information, please click here

Contacts:
Janet Lathrop

413-545-0444

Copyright © University of Massachusetts at Amherst

If you have a comment, please Contact us.

Issuers of news releases, not 7th Wave, Inc. or Nanotechnology Now, are solely responsible for the accuracy of the content.

Bookmark:
Delicious Digg Newsvine Google Yahoo Reddit Magnoliacom Furl Facebook

Related News Press

News and information

Nanostructures Increase Corrosion Resistance in Metallic Body Implants May 24th, 2015

Iranian Scientists Use Magnetic Field to Transfer Anticancer Drug to Tumor Tissue May 24th, 2015

Basel physicists develop efficient method of signal transmission from nanocomponents May 23rd, 2015

This Slinky lookalike 'hyperlens' helps us see tiny objects: The photonics advancement could improve early cancer detection, nanoelectronics manufacturing and scientists' ability to observe single molecules May 23rd, 2015

Microfluidics/Nanofluidics

What makes cancer cells spread? New device offers clues May 19th, 2015

Microchip captures clusters of circulating tumor cells -- NIH study May 18th, 2015

Light in a spin: Researchers demonstrate angular accelerating light April 15th, 2015

Device extracts rare tumor cells using sound: Microfluidic chip developed by CMU President Suresh and collaborators uses acoustic waves to separate circulating tumor cells from blood cells April 7th, 2015

Nanomedicine

Nanostructures Increase Corrosion Resistance in Metallic Body Implants May 24th, 2015

Iranian Scientists Use Magnetic Field to Transfer Anticancer Drug to Tumor Tissue May 24th, 2015

New Antibacterial Wound Dressing in Iran Can Display Replacement Time May 22nd, 2015

Researchers develop new way to manufacture nanofibers May 21st, 2015

Sensors

This Slinky lookalike 'hyperlens' helps us see tiny objects: The photonics advancement could improve early cancer detection, nanoelectronics manufacturing and scientists' ability to observe single molecules May 23rd, 2015

Record high sensitive Graphene Hall sensors May 21st, 2015

Graphene enables tunable microwave antenna May 15th, 2015

Janusz Bryzek Joins MEMS Industry Group to Lead New TSensors Division - New Division will Focus on Accelerating Development of Emerging Ultra-high Volume Sensors Supporting Abundance, mHealth and IoT May 14th, 2015

Discoveries

Nanostructures Increase Corrosion Resistance in Metallic Body Implants May 24th, 2015

Iranian Scientists Use Magnetic Field to Transfer Anticancer Drug to Tumor Tissue May 24th, 2015

Basel physicists develop efficient method of signal transmission from nanocomponents May 23rd, 2015

This Slinky lookalike 'hyperlens' helps us see tiny objects: The photonics advancement could improve early cancer detection, nanoelectronics manufacturing and scientists' ability to observe single molecules May 23rd, 2015

Announcements

Nanostructures Increase Corrosion Resistance in Metallic Body Implants May 24th, 2015

Iranian Scientists Use Magnetic Field to Transfer Anticancer Drug to Tumor Tissue May 24th, 2015

Basel physicists develop efficient method of signal transmission from nanocomponents May 23rd, 2015

This Slinky lookalike 'hyperlens' helps us see tiny objects: The photonics advancement could improve early cancer detection, nanoelectronics manufacturing and scientists' ability to observe single molecules May 23rd, 2015

Interviews/Book Reviews/Essays/Reports/Podcasts/Journals/White papers

Nanostructures Increase Corrosion Resistance in Metallic Body Implants May 24th, 2015

Iranian Scientists Use Magnetic Field to Transfer Anticancer Drug to Tumor Tissue May 24th, 2015

Basel physicists develop efficient method of signal transmission from nanocomponents May 23rd, 2015

This Slinky lookalike 'hyperlens' helps us see tiny objects: The photonics advancement could improve early cancer detection, nanoelectronics manufacturing and scientists' ability to observe single molecules May 23rd, 2015

Energy

Visualizing How Radiation Bombardment Boosts Superconductivity: Atomic-level flyovers show how impact sites of high-energy ions pin potentially disruptive vortices to keep high-current superconductivity flowing May 23rd, 2015

Conversion of Greenhouse Gases to Syngas in Presence of Nanocatalysts in Iran May 22nd, 2015

Sandia researchers first to measure thermoelectric behavior by 'Tinkertoy' materials May 20th, 2015

Industrial Nanotech, Inc. Announces Official Launch of the Eagle Platinum Tile™ May 19th, 2015

Solar/Photovoltaic

Efficiency record for black silicon solar cells jumps to 22.1 percent: Aalto University's researchers improved their previous record by over 3 absolute percents in cooperation with Universitat Politècnica de Catalunya May 18th, 2015

Wearables may get boost from boron-infused graphene: Rice U. researchers flex muscle of laser-written microsupercapacitors May 18th, 2015

Random nanowire configurations increase conductivity over heavily ordered configurations May 16th, 2015

ORNL demonstrates first large-scale graphene fabrication May 14th, 2015

NanoNews-Digest
The latest news from around the world, FREE




  Premium Products
NanoNews-Custom
Only the news you want to read!
 Learn More
NanoTech-Transfer
University Technology Transfer & Patents
 Learn More
NanoStrategies
Full-service, expert consulting
 Learn More










ASP
Nanotechnology Now Featured Books




NNN

The Hunger Project