Featured Research

from universities, journals, and other organizations

Smart Thin Film Membranes Adopt Properties Of Guest Molecules

Date:
March 29, 2007
Source:
Virginia Tech
Summary:
Virginia Tech researchers announced last year that they had created a nanostructured membrane that incorporates DNA base pairs in order to impart molecular recognition and binding ability to the synthetic material. This year they will show for the first time that these new films, membranes, and elastomers are compatible with diverse organic and inorganic molecules and will adopt properties of the guest molecules.

Virginia Tech researchers announced last year that they had created a nanostructured membrane that incorporates DNA base pairs in order to impart molecular recognition and binding ability to the synthetic material. This year they will show for the first time that these new films, membranes, and elastomers are compatible with diverse organic and inorganic molecules and will adopt properties of the guest molecules.

Related Articles


The research is being presented as an invited talk at the 233rd national meeting of the American Chemical Society in Chicago March 25-29.

Chemistry professor Tim Long's research group, students affiliated with the Macromolecule and Interfaces Institute (MII) at Virginia Tech, and the U.S. Army Research Laboratory created a block copolymer, where different monomers are linked in a sequential manner and form a nanostructured film. They used adenine and thymine nucleotides, two of the four DNA base pairs that recognize each other. Then the researchers experimented with different kinds of guest molecules with complementary hydrogen bonding sites (hydrogen has a low energy attraction to many types of atoms).

The low energy attraction, means the guest molecules are widely dispersed throughout the membrane, which then takes on the properties of the guest molecules. "For example," said Long, "if the guest molecules have ionic sites (sites with positive and negative charges), you will be able to transfer water through a film because you would have ion channels at the nanoscale. It's similar to the way a cell membrane works to control the flow of specific ions into a cell. You can create protective clothing -- against chemicals -- that would still allow water vapor through."

Salts, as ordinary table salt, are hydrophilic (water loving) and their introduction into a block copolymer template permits the placement of the salts at the nanometer dimension. One can imagine forming of channels of salts that are not visible with the human eye, but act as a roadway for the transport of water molecules.

"The research is synergy at the nanotechnology-biotechnology interface," Long said.

The talk, "Nucleobase-containing triblock copolymers as templates for the dispersion of guest molecules at the nanoscale" (PMSE 423) will be presented at the 233rd national meeting of the American Chemical Society. Authors are Brian Mather of Albuquerque, a chemical engineering doctoral student in MII; Margaux B. Baker, an undergraduate student from the University of Michigan who studied with Long's group during summer 2006; Long, and Frederick L. Beyer of the U.S. Army Research Laboratory.


Story Source:

The above story is based on materials provided by Virginia Tech. Note: Materials may be edited for content and length.


Cite This Page:

Virginia Tech. "Smart Thin Film Membranes Adopt Properties Of Guest Molecules." ScienceDaily. ScienceDaily, 29 March 2007. <www.sciencedaily.com/releases/2007/03/070328111154.htm>.
Virginia Tech. (2007, March 29). Smart Thin Film Membranes Adopt Properties Of Guest Molecules. ScienceDaily. Retrieved November 26, 2014 from www.sciencedaily.com/releases/2007/03/070328111154.htm
Virginia Tech. "Smart Thin Film Membranes Adopt Properties Of Guest Molecules." ScienceDaily. www.sciencedaily.com/releases/2007/03/070328111154.htm (accessed November 26, 2014).

Share This


More From ScienceDaily



More Matter & Energy News

Wednesday, November 26, 2014

Featured Research

from universities, journals, and other organizations


Featured Videos

from AP, Reuters, AFP, and other news services

NASA's First 3-D Printer In Space Creates Its First Object

NASA's First 3-D Printer In Space Creates Its First Object

Newsy (Nov. 26, 2014) The International Space Station is now using a proof-of-concept 3D printer to test additive printing in a weightless, isolated environment. Video provided by Newsy
Powered by NewsLook.com
Bolivian Recycling Initiative Turns Plastic Waste Into School Furniture

Bolivian Recycling Initiative Turns Plastic Waste Into School Furniture

Reuters - Innovations Video Online (Nov. 26, 2014) Innovative recycling project in La Paz separates city waste and converts plastic garbage into school furniture made from 'plastiwood'. Tara Cleary reports. Video provided by Reuters
Powered by NewsLook.com
Blu-Ray Discs Getting Second Run As Solar Panels

Blu-Ray Discs Getting Second Run As Solar Panels

Newsy (Nov. 26, 2014) Researchers at Northwestern University are repurposing Blu-ray movies for better solar panel technology thanks to the discs' internal structures. Video provided by Newsy
Powered by NewsLook.com
Today's Prostheses Are More Capable Than Ever

Today's Prostheses Are More Capable Than Ever

Newsy (Nov. 26, 2014) Advances in prosthetics are making replacement body parts stronger and more lifelike than they’ve ever been. Video provided by Newsy
Powered by NewsLook.com

Search ScienceDaily

Number of stories in archives: 140,361

Find with keyword(s):
Enter a keyword or phrase to search ScienceDaily for related topics and research stories.

Save/Print:
Share:

Breaking News:

Strange & Offbeat Stories


Space & Time

Matter & Energy

Computers & Math

In Other News

... from NewsDaily.com

Science News

Health News

Environment News

Technology News



Save/Print:
Share:

Free Subscriptions


Get the latest science news with ScienceDaily's free email newsletters, updated daily and weekly. Or view hourly updated newsfeeds in your RSS reader:

Get Social & Mobile


Keep up to date with the latest news from ScienceDaily via social networks and mobile apps:

Have Feedback?


Tell us what you think of ScienceDaily -- we welcome both positive and negative comments. Have any problems using the site? Questions?
Mobile: iPhone Android Web
Follow: Facebook Twitter Google+
Subscribe: RSS Feeds Email Newsletters
Latest Headlines Health & Medicine Mind & Brain Space & Time Matter & Energy Computers & Math Plants & Animals Earth & Climate Fossils & Ruins