PRTODAY / NewswireToday Free press release distribution service network

More news: Nanotechnology
Written by / Agency / Source: Nanowerk, LLC

Check Ads Availability|e-mail Article


Are you the owner of this article?, Turn it PREMIUM with your LOGO instead - and make it 3rd party Ads-Free! within the next hour!

Constructing Smart Nanomaterials with DNA Molecules - By employing small pieces of DNA molecules called aptamers, nanomaterials can be smart enough to assemble or disassemble only in the presence of programmable signals such as
Constructing Smart Nanomaterials with DNA Molecules

 

NewswireToday - /newswire/ - Honolulu, HI, United States, 2006/07/13 - By employing small pieces of DNA molecules called aptamers, nanomaterials can be smart enough to assemble or disassemble only in the presence of programmable signals such as "AND" or "OR", with controllable cooperativity..

   
 
Your Banner Ad Here instead - Showing along with ALL Articles covering Nanotechnology Announcements

Replace these Affiliate Programs at ANYTIME! Your banner here within the next hour. Learn How!


 

Researchers at the University of Illinois at Urbana-Champaign have shown that, by employing small pieces of DNA molecules called aptamers, nanomaterials can be smart enough to assemble or disassemble only in the presence of programmable signals such as "AND" or "OR", with controllable cooperativity.

Tremendous progress has been made in making individual nanomaterials. To realize the full potentials of nanoscale science and technology, one must learn how to assemble or disassemble these materials at a specific location in response to a need for such materials. Most work focuses on nanomaterials assembly in response to external signals or stimuli, such as temperature, pH, etc. Biomaterials, on the other hand, are assembled under almost constant external variables such as temperature and pH.

Instead, Professor Yi Lu from the Department of Chemistry at the University of Illinois, and his group came up with the first examples of controlled assembly (and disassembly) of smart materials in response to internal signals, sometimes to multiple stimuli.

Together with first author Juewen Liu he recently published a paper, titled "Smart Nanomaterials Responsive to Multiple Chemical Stimuli with Controllable Cooperativity" in the June 27, 2006 online edition of Advanced Materials.

"Since 2003, my group has been focusing on learning from Nature to control nanomaterials assembly in response to internal stimuli" Lu explains to Nanowerk. "In this paper, we went a step further by demonstrating that nanoparticle assembly and disassembly can be programmed like a computer code in response to "AND" or "OR" of two chemical stimuli. Their cooperativity, i.e. the requirement of two molecules working together to affect the aggregation states of nanoparticles, can also be controlled."

Lu's group took advantage of the high binding properties of aptamers to assemble nanoparticles and demonstrated that small molecules can regulate the assembly state of DNA functionalized gold nanoparticles. Aptamers are nucleic acids that can bind to target molecules with high affinity and specificity. The range of molecules that aptamers can selectively bind to rivals that of antibodies and they can be selected to target essentially any molecule of choice.

By incorporating aptamers to nanomaterials, Lu's group has demonstrated smart materials responsive to adenosine, cocaine, and K+. Because of the generality of the designs, materials responsive to any combination of the three chemicals can be prepared. More importantly, the cooperativity between the molecules is controllable.

"Fine-control of nanomaterials assembly or disassembly has always been a huge challenge" says Lu. "Our work is a step in the right direction. For instance, a short-term application is better colorimetric sensors for molecules such as adenosine and cocaine, since controlled assembly in response to those stimuli resulted in dramatic color changes. Adding "AND" and "OR" to such a process make sensing less vulnerable to false positive results."

By replacing the gold nanoparticles with other nanomaterials, such as quantum dots, nanotubes, or polymers, smart materials suitable for a diverse range of applications can be obtained. The principles demonstrated in Lu's work may also apply to controlled assembly of nanoelectronics or nanophotonics in the long-term future.

By Michael Berger, Copyright 2006 Nanowerk LLC

 
 
Your Banner Ad Here instead - Showing along with ALL Articles covering Nanotechnology Announcements

Replace these Affiliate Programs at ANYTIME! Your banner here within the next hour. Learn How!


 

Written by / Agency / Source: Nanowerk, LLC

 
 

Availability: All Regions (Including Int'l)

 

Traffic Booster: [/] Quick Newswire Today Visibility Checker

 

Distribution / Indexing: [+]

 
 
# # #
 
 
  Your Banner Ad showing on ALL
Nanotechnology articles,
CATCH Visitors via Your Competitors Announcements!


Constructing Smart Nanomaterials with DNA Molecules

Company website links NOT available to basic submissions
It is OK to republish and/or LINK any newswire for any legitimate media purpose as long as you name Newswire Today and LINK as the source.
 
  Is this your article?
Activate ALL web links and social stream by Upgrading to Press Release PREMIUM Plan Now!

Nanowerk News |
Publisher Contact: Michael Berger - Nanowerk.com 
1-808-741-1739 michael[.]nanowerk.com
 
Newswire Today - PRZOOM / PRTODAY disclaims any content contained in this article. If you need/wish to contact the company who published the current release, you will need to contact them - NOT us. Issuers of articles are solely responsible for the accuracy of their content. Our complete disclaimer appears here.
IMPORTANT INFORMATION: Issuance, publication or distribution of this press release in certain jurisdictions could be subject to restrictions. The recipient of this press release is responsible for using this press release and the information herein in accordance with the applicable rules and regulations in the particular jurisdiction. This press release does not constitute an offer or an offering to acquire or subscribe for any Nanowerk, LLC securities in any jurisdiction including any other companies listed or named in this release.

Nanotechnology via RSSAdd NewswireToday - PRZOOM Headline News to FeedBurner
Find who RetweetFollow @NewswireTODAY



Are you the owner of this article?, Turn it PREMIUM with your LOGO instead - and make it 3rd party Ads-Free! within the next hour!


Read Latest Articles From Nanowerk, LLC / Company Profile


Read Nanotechnology Most Recent Related Newswires:

NEC Discovers 'Carbon Nanobrush' - The World's First Fibrous Aggregate of Carbon Nanohorns
Frost & Sullivan Commends RUSNANO for Accelerating the Russian Nanotechnology Industry with Its Unique Investment Strategy and Innovative Services
Imec and Crystal Solar Demonstrate 22.5 Percent nPERT Si Solar Cells on Kerfless Epitaxial Wafers
Nanomaterials for Printing Market Worth $1,974 Million by 2019 Reports MarketsAndMarkets
Nanotechnology in Medical Devices Market Worth $8.5 Billion by 2019 Finds MarketsandMarkets
Polymer Nanocomposites Market Worth $5,100 Million by 2020 Finds MarketsAndMarkets
First Speakers of EuroNanoForum 2015 Announced
OCSiAl Group Receives Frost & Sullivan Technology Innovation Award for its Game-Changing Carbon Nanotube Production Process
Elmo Features its NANO Ultra High Power Servo Drive at IAS 2014 in China
Carbodeon Ltd Oy Announces Improvements to Electroless Nickel Including A 3x Improvement in Wear Resistance
IMARC Group Publishes New Report Insights on Setting Up A Rare Earth Magnet Manufacturing Plant
Carbodeon Enables 20 Percent Increase in Polymer Thermal Filler Conductivity
Industry Veteran Fergus Clarke Joins Picodeon as CEO
Picodeon’s Pulsed Laser Deposition Technology Enables Microstructural Control
Imec Integrates CCD and CMOS Technology to Improve Performance of CMOS imagers

Boost Your Social Network
& Crowdfunding Campaigns


LIFETIME SOCIAL MEDIA WALL
NewswireToday Celebrates 10 Years in Business


PREMIUM Members


Visit  BizJobs.com

Visit  JobsWare.com





 
  ©2016 Newswire Today — Limelon Advertising, Co.
Home | About | Advertise/Pricing | Contact | Investors | Privacy/TOS | Sitemap | FRANCAIS
newswire, PR free press releases distribution service magazines engine news alert newsroom press room breaking news public relations articles company news alerts newswiredistribution ezine bizentrepreneur biznewstoday digital business report market search pr firms agencies reports distri-bution today investor relation successful internet entrepreneurs newswire distribution prtoday.com freenewswiredistribution asianewstoday bizwiretoday USA pr UK today - NOT affiliated with PRNewswire as we declined their partnership offer in 2013
 
PRTODAY & NewswireTODAY are NOT affiliated with USA TODAY (usatoday.com)