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:
TAG: ORNL nanoprobe creates world new possibilities

(Date:7/24/2014)... experts gathered at NJIT this week for an all-day ... U.S. Environmental Protection Agency (EPA) to dredge toxic sediment ... , The EPA has called the plan, which proposes ... capping sections of the riverbed, one of the largest ... be dredged and disposed off-site. , "We need to ...
(Date:7/24/2014)... into the potato genes that best adapt to the ... rainfall and increased extremes of hot and cold temperatures.The ... order to create new potato varieties that will adapt ... to find out how the current potato varieties will ... and lower temperatures. , This research is part of ...
(Date:7/24/2014)... on his work with a new drug that successfully treated ... Houston has received a $250,000 grant to expand his research ... to treat a wider range of autoimmune diseases., Chandra Mohan, ... Engineering at UH, previously published a study in Arthritis Research ... successfully treated lupus in mice and reduced the number of ...
Breaking Biology News(10 mins):Experts Weigh the Pros and Cons of a $1.7 Billion EPA Cleanup Plan for the Passaic River at an NJIT 2Neiker-Tecnalia is researching the potato genes that best adapt to climate change 2Biomedical engineer looks at new applications for novel lupus drug 2Biomedical engineer looks at new applications for novel lupus drug 3
(Date:7/24/2014)... Research and Markets has announced ... 2014-2018" report to their offering.  ... the in vitro growth of plant or animal cells ... biopharmaceutical production. Cell culture is a crucial step in ... cell culture consumables are necessary for the in vitro ...
(Date:7/24/2014)... 2014 SRI International has been awarded a ... of Allergy and Infectious Diseases (NIAID), part of the ... potential therapies for HIV infection and AIDS. The contract ... AIDS and the complications and opportunistic infections associated with ... transmission of HIV. According to the ...
(Date:7/24/2014)... Texas (PRWEB) July 24, 2014 ... Potassium Sulphate Industry” is a professional and in-depth ... report introduces Potassium Sulphate basic information, including ... and industry overview. This research covers the international ... as global industry analysis covering macroeconomic environment & ...
(Date:7/24/2014)... (PRWEB) July 24, 2014 1000 balances ... takes input on customers’ weighing needs and expertly narrows ... shortlist of balances, scales or even terminals. , ... and smallest weight (or select readability instead) and define ... few additional selection criteria narrows down the list to ...
Breaking Biology Technology:Global Cell Culture Market 2014-2018: Key Vendors are Becton, Dickinson and Co, EMD, GE Healthcare, Lonza Group, Sigma Aldrich and Thermo Fisher Scientific 2National Institute of Allergy and Infectious Diseases Awards SRI International Contract to Study New Therapies for HIV and AIDS 2National Institute of Allergy and Infectious Diseases Awards SRI International Contract to Study New Therapies for HIV and AIDS 3Potassium Sulphate Market & SHMP Industry 2014 (Global, China) Analysis Now Available at DeepResearchReports.com 2Potassium Sulphate Market & SHMP Industry 2014 (Global, China) Analysis Now Available at DeepResearchReports.com 3Potassium Sulphate Market & SHMP Industry 2014 (Global, China) Analysis Now Available at DeepResearchReports.com 4
Cached News: