Navigation Links
Stable polymer nanotubes may have a biotech future

Editor : See how a nanotube is created in this cool movie

Scientists at the National Institute of Standards and Technology (NIST) have created polymer nanotubes that are unusually long (about 1 centimeter) as well as stable enough to maintain their shape indefinitely. Described in a new paper in Proceedings of the National Academy of Sciences,* the NIST nanotubes may have biotechnology applications as channels for tiny volumes of chemicals in nanofluidic reactor devices, for example, or as the "world's smallest hypodermic needles" for injecting molecules one at a time.

Carbon nanotubes are of keen interest in nanotechnology research, especially for making ultrastrong fibers and other structures. Nanotubes made from other materials are used for transport in biochemical applications, but are typically fragile and usually collapse within a few hours. The NIST team developed processes for extending the shelf life of polymer nanotubes--considered essential for commercial applications--and forming sturdy nanotube network structures.

First the researchers made tiny, fluid-filled spherical containers with bi-layer membranes consisting of polymers with one end that likes water and one end that does not. (These fluid-filled containers are a spin-off of liposomes, artificial cells with fatty membranes used in cosmetics and for drug delivery.) The researchers made the membranes stretchy by adding a soap-like fluid to change the polymer membranes' mechanical properties. Then they used "optical tweezers" (highly focused infrared lasers) or tiny droppers called micropipettes to pull on the elastic membranes to form long, double-walled tubes that are less than 100 nanometers in diameter. (View a movie of this process at: http://www.nist.gov/public_affairs/images/Polymer_Nanotu bes_Animation.htm.)

A chemical was added to break bonds between atoms in one section of the polymers and induce new bonds to form between the two different sections, forming a rigid "cross-linked" membrane. The nanotubes are then snipped free from the parent cell with an "optical scalpel" (highly focused ultraviolet laser pulse). The nanotubes maintain their shape even after several weeks of storage, and can be removed from the liquid solution and placed on a dry surface or in a different container. The optical tweezers can be used to custom build nanotube network structures. The work was supported in part by the Office of Naval Research.


'"/>

Source:National Institute of Standards and Technology (NIST)


Related biology news :

1. New RNA polymerase discovered in plants
2. DuPonts first biologically derived polymer receives global recognition
3. Triple threat polymer captures and releases
4. MIT engineers probe spiders polymer art
5. Researcher examines polymers created with poultry feathers
6. Applied scientists create wrinkled skin on polymers
7. Gadonanotubes greatly outperform existing MRI contrast agents
8. Modifications render carbon nanotubes nontoxic
9. Nanoparticles, nanoshells, nanotubes: How tiny specks may provide powerful tools against cancer
10. Carbon nanotubes that detect disease-causing mutations developed by Pitt researcher
11. Detection of DNA on nanotubes offers new sensing, sequencing technologies
Post Your Comments:
*Name:
*Comment:
*Email:


(Date:1/25/2016)... Jan. 25, 2016   Unisys Corporation (NYSE: UIS ... F. Kennedy (JFK) International Airport, New York City ... identify imposters attempting to enter the United States ... them. pilot testing of the system at Dulles ... terminals at JFK during January 2016. --> pilot testing ...
(Date:1/22/2016)... , Jan. 22, 2016 ... addition of the "Global Biometrics Market ... their offering. --> http://www.researchandmarkets.com/research/p74whf/global_biometrics ... "Global Biometrics Market in Retail Sector ... --> Research and Markets ( ...
(Date:1/20/2016)... --  MedNet Solutions , an innovative SaaS-based eClinical technology ... is pleased to announce the attainment of record-setting corporate ... of the company,s laser focus on (and growing international ... comprehensive, easy-to-use and highly affordable cloud-based technology platform. ... growth achievements in 2015 include: , Record ...
Breaking Biology News(10 mins):
(Date:2/4/2016)... ... February 04, 2016 , ... ... takes place February 5-6 at the University’s student center, Kehr Union, located ... as workshops and competitions for ample networking, learning and collaborating opportunities. , ...
(Date:2/4/2016)... MENLO PARK, Calif. , Feb. 4, 2016 ... the "Company"), a biopharmaceutical company focused on the development and ... present at the 18 th Annual BIO CEO ... 10:00 a.m. EST in New York, NY ... CEO, will provide an update on the ongoing clinical trial ...
(Date:2/4/2016)... 4, 2016  Spherix Incorporated (Nasdaq: SPEX ) -- an ... monetization of intellectual property, today provided an update on ... Northern District of Texas and ... Inter Partes Re-examination ("IPR") proceedings that VTech ... IPR was initiated on only certain claims of two ...
(Date:2/4/2016)... OXFORD, England , February 4, 2016 ... Advanced Bioscience Laboratories (ABL), Inc. --> Strasbourg, ... (ABL), Inc. --> PharmaVentures is pleased to announce ... sale of its biopharmaceutical manufacturing unit in Strasbourg, ... (ABL), Inc. --> --> ...
Breaking Biology Technology: