Navigation Links
NC State engineers discover nanoparticles can break on through
Date:9/16/2008

In a finding that could speed the use of sensors or barcodes at the nanoscale, North Carolina State University engineers have shown that certain types of tiny organic particles, when heated to the proper temperature, bob to the surface of a layer of a thin polymer film and then can reversibly recede below the surface when heated a second time.

Selectively bringing a number of particles to a surface and then sinking them back below it results in controllable surface patterns. According to NC State researchers involved in the project, patterning surfaces is one of the holy grails of current nanotechnology research, and is difficult to do with certain particles. They add that the finding could result in tiny reusable bar codes, or in small fluorescent features that turn off when they sense too much heat or the presence of a certain chemical.

Dr. Jan Genzer, professor of chemical and biomolecular engineering, and Dr. Richard Spontak, professor of chemical and biomolecular engineering and materials science and engineering, published their finding along with graduate students Arif Gozen and Bin Wei in the journal Nano Letters. They worked with engineers who designed the unique particles at the University of Melbourne in Australia.

The researchers used a special type of organic nanoparticle called a core-shell microgel in which the core of a cross-linked, or networked, polymer is surrounded by a shell of a different polymer.

"Most polymers are chain-like macromolecules that are like very long, cooked spaghetti noodles, but these special core-shell particles are shaped more like squash balls of one polymer with a fuzzy surface of a different polymer," Spontak says.

Heating these approximately 30-nanometer particles - which are hundreds of times smaller than a human hair - allows them to break through a polymer/polymer interface like a submarine coming to the surface of water. Reheating the particles at a polymer surface sinks them back below the surface.

"This technique allows us to place the particles right where we want them - on the surface of a thin film," Genzer says. "It can be used to create a reusable bar code, for instance, or other functional polymer surfaces."


'/>"/>

Contact: Mick Kulikowski
mick_kulikowski@ncsu.edu
919-515-8387
North Carolina State University
Source:Eurekalert

Related biology technology :

1. Department of Justice Provides States With Funding for Testing in Postconviction Cases
2. Orange Coast Urology Offers Advanced In-Office Patient EVOLVE(R) Laser Prostate Treatment
3. Revolutionary New In-Office EVOLVE(R) Laser Prostate Treatment Available Throughout Western Oregon
4. InVitria Further Strengthens Sales Team with Promotion of Brandy Sargent to Account Manager - Western United States
5. States First Single Incision Robotic Kidney Removal Performed at Henry Ford Hospital
6. Baxter Announces Licensing Agreement for Innocolls Gentamicin Surgical Implant in the United States
7. Dendreon Initiates Second of Two New Phase 2 Trials of PROVENGE for Prostate Cancer
8. Medicsight Receives Brazilian State Food and Drug Administration Approval for ColonCAD Software
9. United BioSource Corporation and CogState Ltd. Form Strategic Partnership to Support Cognitive Assessment in Clinical Research
10. A Statement From Larry Corey, MD, of the HIV Vaccine Trials Network Regarding the New HIV Infection Statistics Released Today by the Centers for Disease Control
11. Silence Therapeutics Receives Allowance from United States Patent and Trademark Office for its Core RNAi Patent
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:2/24/2017)... 2017 China Cord Blood Corporation (NYSE: ... provider of cord blood collection, laboratory testing, hematopoietic stem ... its unaudited financial results for the third quarter and ... 31, 2016. Third Quarter of Fiscal 2017 ... of fiscal 2017 increased by 18.6% to RMB200.9 million ...
(Date:2/23/2017)... NEW YORK , Feb. 23, ... , a leading digital health company, and ... of telemedicine and remote patient monitoring, announce they ... reimbursements.  DN Telehealth maximizes collaboration ... real-time, extending consultations beyond a physical clinical setting ...
(Date:2/23/2017)... Feb. 23, 2017  In Atlanta, it seems everyone has ... culture intertwine to create an expressive and dynamic community unlike ... energy and contribute to it. With their ... Fairies seeks to carry on that tradition with a ... Atlanta salon is the newest of 13 nationwide ...
(Date:2/23/2017)... ... February 23, 2017 , ... ... 12th annual Inventors Recognition Reception at Purdue Research Park of West ... member in recognition of outstanding contributions to, and success with, commercializing discoveries from ...
Breaking Biology Technology:
(Date:2/22/2017)... , Feb. 22, 2017 With ... 2021, ABI Research identifies four technologies that innovative ... to secure significant share in the changing competitive ... and passive authentication.   "Companies can ... comes to security," says Dimitrios Pavlakis , ...
(Date:2/13/2017)... , Feb. 13, 2017  RSA Conference -- ... platform that is designed to enhance fraud detection ... release in the RSA Fraud & Risk Intelligence ... organizations to leverage additional insights from internal and ... to better protect their customers from targeted cybercrime ...
(Date:2/8/2017)... Mass., Feb. 7, 2017  Aware, Inc. (NASDAQ: ... today reported financial results for its quarter and year ended ... quarter of 2016 was $3.9 million compared to $6.9 million ... fourth quarter of 2016 was $0.6 million compared to $2.6 ... the fourth quarter of 2016 was $0.5 million, or $0.02 ...
Breaking Biology News(10 mins):