HOME >> BIOLOGY >> NEWS
ORNL nanoprobe creates world of new possibilities

OAK RIDGE, Tenn., July 14, 2004 -- A technology with proven environmental, forensics and medical applications has received a shot in the arm because of an invention by researchers at the Department of Energy's Oak Ridge National Laboratory.

ORNL's nanoprobe, which is based on a light scattering technique, can detect and analyze chemicals, explosives, drugs and more at a theoretical single-molecule level. This capability makes it far more selective and accurate than conventional competing technologies.

The probe is an optical fiber tapered to a tip measuring 100 nanometers with an extremely thin coating of nanoparticles of silver, which induces the surface-enhanced Raman scattering (SERS) effect. Normally, when a sample is illuminated by a laser beam, there is a small reflection of light, known as Raman scattering. The light shows vibration energies, which are unique to each compound, and that information allows scientists to identify the substance.

With the SERS nanoprobe, the laser light creates rapid oscillations of the electrons in the silver nanoparticles, which produce an enormous electromagnetic field that contributes to increase the Raman scattering signal. The ORNL nanoprobe works with any surface to induce the SERS effect.

"The significance of this work is that we are now able to perform direct analysis of samples -- even dry samples -- with no preparation of the surface," said ORNL's Tuan Vo-Dinh, who leads a team that developed the nanoprobe. "Also, the small scale of the nanoprobe demonstrates the potential for detection in nanoscale environments, such as at the intracellular level."

Ordinarily, surface-enhanced Raman scattering analysis of samples on a surface requires modification or treatment of the sample. This may consist of physically removing the sample and diluting it in a liquid containing silver nanoparticles; however, this practice is unnecessary with the ORNL nanoprobe.

Vo-Dinh and Life Sciences
'"/>

Contact: Ron Walli
wallira@ornl.gov
865-576-0226
DOE/Oak Ridge National Laboratory
14-Jul-2004


Page: 1 2

Related biology news :

1. Electrodes and nanoprobes signal new DNA detection method
2. UAB creates the first Internet server to search for genetic diversity
3. Scientists discover how anthrax creates its deadly spores
4. Ohio State creates first gene chip for horse
5. Philippines: Park expansion creates nations largest contiguous protected area
6. Packard Childrens Hospital gift creates new biotech research center for childrens health
7. Laboratory theme park re-creates RNA world for study
8. Gene loss creates age- and gender-dependent cancer syndrome in mice
9. Gift creates KSU Human Origins Study Institute
10. Purdue creates self-generating nanotubes with dial-up properties
11. Razing old dams solves some problems, creates new ones

Post Your Comments:
*Name:
*Comment:
*Email:


(Date:8/14/2018)... N.Y. (PRWEB) , ... August 13, 2018 , ... ... new 2017/18 products, the Staticmaster® P-2021-5502 and P-2021-5602 Cleanroom Ionizing Gun. , ... VTE-208 Filtered Nitrogen Air Gun, P-2021 ionizing cartridge, 0.5-micron filter and electropolished OSHA-compliant ...
(Date:8/14/2018)... ... August 14, 2018 , ... ... solutions for the global scientific community, announced today the establishment of a new ... division is to foster and support scientific collaborations with ActiGraph’s academic and pharmaceutical ...
(Date:8/14/2018)... ... August 14, 2018 , ... From reconstruction of craniofacial syndrome ... better understanding of congenital heart defects, 3-D printing is providing exciting approaches to ... of Birth Defects Research (DOI: 10.1002/bdr2.1367). , The special ...
Breaking Biology News(10 mins):
(Date:7/27/2018)... ... July 27, 2018 , ... ... of the Biotechnology Innovation Organization (BIO) met with U.S. Environmental Protection Agency ... a Toxic Substances Control Act (TSCA) Inventory Representation and Equivalency Determinations for ...
(Date:7/25/2018)... ... July 25, 2018 , ... Vium, Inc. http://www.vium.com ... and Vium Cloud approach to accelerate preclinical drug discovery and development, today announced ... announced the appointment of Jeff Caron to the newly formed role of Senior ...
(Date:7/24/2018)... ... July 23, 2018 , ... ... energy treated nutraceutical to increase immunity and improve anti-inflammatory, and immune function responses. ... assessed in the preclinical research were significantly reduced. Results are as follows:, ...
(Date:7/22/2018)... ... July 19, 2018 , ... CallTower ... joined their team. With more than ten years of strategic, result-oriented Channel experience ... expertise as CallTower’s Channel Director for the Southwest and Mountain region. , As ...
Breaking Biology Technology:
Cached News: