Featured Research

from universities, journals, and other organizations

Carbon Nanotubes Yield A New Class Of Biological Sensors

Date:
December 15, 2004
Source:
National Science Foundation
Summary:
Nanotechnology researchers at the University of Illinois in Urbana-Champaign have demonstrated a tiny, implantable detector that could one day allow diabetics to monitor their glucose levels continuously—without ever having to draw a blood sample.

This glass capillary tube, shown here on a fingertip, has been loaded with glucose-sensitive nanotubes. The capillary tube keeps the nanotubes confined, but has porous walls so that glucose molecules can get to them.
Credit: Michael S. Strano

Arlington, Va. -- Nanotechnology researchers at the University of Illinois in Urbana-Champaign have demonstrated a tiny, implantable detector that could one day allow diabetics to monitor their glucose levels continuously—without ever having to draw a blood sample.

Related Articles


The work, which is the first application of a whole new class of biological sensors, was funded by the National Science Foundation (NSF) and announced December 12 in the online edition of the journal Nature Materials.

Principal investigator Michael Strano, a professor of chemical and biomolecular engineering at Illinois, explains that the new sensors are based on single-walled carbon nanotubes: cylindrical molecules whose sides are formed from a lattice of carbon atoms. The idea is to exploit the nanotubes’ ability to fluoresce, or glow, when illuminated by certain wavelengths of infrared light—“a region of the spectrum where human tissue and biological fluids are particularly transparent,” says Strano.

To make a sensor, Strano and his collaborators first coat the nanotubes with a “molecular sheath”: a one-molecule-thick layer of compounds that react strongly with a particular chemical—in this case, glucose. The mix of compounds is chosen so that the reaction also changes the nanotubes’ fluorescent response. Then the researchers load the coated nanotubes into a needle-thin capillary tube that can safely be implanted into the body. The capillary keeps the nanotubes from directly touching living cells but still allows glucose to enter.

The Illinois researchers tested their glucose sensor by inserting it into a human tissue sample. Then they illuminated the sample with an infrared laser and verified that the strength of the fluorescence from the buried sensor was directly related to the glucose concentrations in the tissue.


Story Source:

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


Cite This Page:

National Science Foundation. "Carbon Nanotubes Yield A New Class Of Biological Sensors." ScienceDaily. ScienceDaily, 15 December 2004. <www.sciencedaily.com/releases/2004/12/041214081957.htm>.
National Science Foundation. (2004, December 15). Carbon Nanotubes Yield A New Class Of Biological Sensors. ScienceDaily. Retrieved December 19, 2014 from www.sciencedaily.com/releases/2004/12/041214081957.htm
National Science Foundation. "Carbon Nanotubes Yield A New Class Of Biological Sensors." ScienceDaily. www.sciencedaily.com/releases/2004/12/041214081957.htm (accessed December 19, 2014).

Share This


More From ScienceDaily



More Matter & Energy News

Friday, December 19, 2014

Featured Research

from universities, journals, and other organizations


Featured Videos

from AP, Reuters, AFP, and other news services

Building Google Into Cars

Building Google Into Cars

Reuters - Business Video Online (Dec. 19, 2014) Google's next Android version could become the standard that'll power your vehicle's entertainment and navigation features, Reuters has learned. Fred Katayama reports. Video provided by Reuters
Powered by NewsLook.com
AP Review: Nikon D750 and GoPro Hero 4

AP Review: Nikon D750 and GoPro Hero 4

AP (Dec. 19, 2014) What to buy an experienced photographer or video shooter? There is some strong gear on the market from Nikon and GoPro. The AP's Ron Harris takes a closer look. (Dec. 19) Video provided by AP
Powered by NewsLook.com
Double-Amputee Becomes First To Move Two Prosthetic Arms With His Mind

Double-Amputee Becomes First To Move Two Prosthetic Arms With His Mind

Buzz60 (Dec. 19, 2014) A double-amputee makes history by becoming the first person to wear and operate two prosthetic arms using only his mind. Jen Markham has the story. Video provided by Buzz60
Powered by NewsLook.com
Navy Unveils Robot Fish

Navy Unveils Robot Fish

Reuters - Light News Video Online (Dec. 18, 2014) The U.S. Navy unveils an underwater device that mimics the movement of a fish. Tara Cleary reports. Video provided by Reuters
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