Navigation Links
Princeton engineers make breakthrough in ultra-sensitive sensor technology
Date:3/21/2011

l method to determine the identity of the substance, analogous to the way a finger print or DNA signature helps identify a person.

Since Raman first discovered the phenomena a breakthrough that earned him Nobel Prize engineers have dreamed of using it in everyday devices to identify the molecular composition and structures of substances, but for many materials the strength of the extra colors of reflected light was too weak to be seen even with the most sophisticated laboratory equipment.

Researchers discovered in the 1970s that the Raman signals were much stronger if the substance to be identified is placed on a rough metal surface or tiny particles of gold or silver. The technique, known as surface enhanced Raman scattering (SERS), showed great promise, but even after four decades of research has proven difficult to put to practical use. The strong signals appeared only at a few random points on the sensor surface, making it difficult to predict where to measure the signal and resulting in a weak overall signal for such a sensor.

Abandoning the previous methods for designing and manufacturing the sensors, Chou and his colleagues developed a completely new SERS architecture: a chip studded with uniform rows of tiny pillars made of metals and insulators.

One secret of the Chou team's design is that their pillar arrays are fundamentally different from those explored by other researchers. Their structure has two key components: a cavity formed by metal on the top and at the base of each pillar; and metal particles of about 20 nanometers in diameter, known as plasmonic nanodots, on the pillar wall, with small gaps of about 2 nanometers between the metal components.

The small particles and gaps significantly boost the Raman signal. The cavities serve as antennae, trapping light from the laser so it passes the plasmonic nanodots multiple times to generate the Raman signal rather than only once. The cavities also
'/>"/>

Contact: Chris Emery
cemery@princeton.edu
609-258-4597
Princeton University, Engineering School
Source:Eurekalert  

Page: 1 2 3

Related biology technology :

1. Princeton scientists find an equation for materials innovation
2. Princeton scientists find unusual electrons that go with the flow
3. Online Systems Engineering Master's Program Attracts Engineers from Fortune 500 Firms
4. NC State engineers discover nanoparticles can break on through
5. Engineers aim to solve burning computer problem
6. Virginia Tech engineers identify conditions that initiate erosion
7. Techstreet Launches BuildingBlocks Utility for Industry Standards Saving Time and Increasing Productivity for Engineers
8. Virginia Tech engineers investigate energy independent monitoring system for bridges
9. New Educational Website Celebrates the Accomplishments of Engineers
10. Engineers tune a nanoscale grating structure to trap and release a variety of light waves
11. UB engineers prove that carbon nanotubes are superior to metals for electronics
Post Your Comments:
*Name:
*Comment:
*Email:
Related Image:
Princeton engineers make breakthrough in ultra-sensitive sensor technology 
(Date:9/2/2014)... 2014 Reportbuyer.com has added a new ... Products and Global Markets https://www.reportbuyer.com/product/1923022/Human-Reproductive-Technologies-Products-and-Global-Markets.html ... The objective of the study is to present ... reproductive technologies and products. Markets are divided according ... some markets are mature, while products in other ...
(Date:9/2/2014)... , Sept. 2, 2014 /PRNewswire-iReach/ -- DeepResearchReports.com ... Bicarbonate Industry" and "2014 Market Research Report on ... database. Photo - http://photos.prnewswire.com/prnh/20140902/141873 ... Global Sodium Bicarbonate Industry" is a professional and ... and Global Sodium Bicarbonate market. The report ...
(Date:9/2/2014)... September 02, 2014 The Little Company ... Chicagoland, constructed a new 290,000 square-foot West Pavilion patient ... Lockers from Scranton Products for the nurse’s lounge ... Little Company of Mary Hospital’s $180 million, ... 2014 with the connection of the West Pavilion tower ...
(Date:9/2/2014)... BELLINGHAM, Washington, USA (PRWEB) September 02, 2014 ... Year of Light and Light-based Technologies (IYL 2015) ... awards from SPIE, the international society for optics ... were presented to Levinson and Dudley along with other ... of the Society won by James Harrington, during a ...
Breaking Biology Technology:Human Reproductive Technologies: Products and Global Markets 2Human Reproductive Technologies: Products and Global Markets 3Human Reproductive Technologies: Products and Global Markets 4Human Reproductive Technologies: Products and Global Markets 5Human Reproductive Technologies: Products and Global Markets 6Human Reproductive Technologies: Products and Global Markets 7Human Reproductive Technologies: Products and Global Markets 8Human Reproductive Technologies: Products and Global Markets 9Human Reproductive Technologies: Products and Global Markets 10Human Reproductive Technologies: Products and Global Markets 11Human Reproductive Technologies: Products and Global Markets 12Human Reproductive Technologies: Products and Global Markets 13Human Reproductive Technologies: Products and Global Markets 14Human Reproductive Technologies: Products and Global Markets 15Human Reproductive Technologies: Products and Global Markets 16Human Reproductive Technologies: Products and Global Markets 17Sodium Bicarbonate Market & Ammonium Acetate Industry: China & Global Analysis 2Sodium Bicarbonate Market & Ammonium Acetate Industry: China & Global Analysis 3Sodium Bicarbonate Market & Ammonium Acetate Industry: China & Global Analysis 4Sodium Bicarbonate Market & Ammonium Acetate Industry: China & Global Analysis 5Tufftec® Lockers from Scranton Products Selected by Little Company of Mary Hospital Near Chicago to Create an Uplifting Environment 2Tufftec® Lockers from Scranton Products Selected by Little Company of Mary Hospital Near Chicago to Create an Uplifting Environment 3Levinson, Dudley Win SPIE Directors’ and President’s Awards 2Levinson, Dudley Win SPIE Directors’ and President’s Awards 3Levinson, Dudley Win SPIE Directors’ and President’s Awards 4
... Dr. ... San Antonio and South Central Texas, , ... (PRWEB) June 15, 2010 -- For those looking for a trimmer physique without ... Zeltiq ™ Procedure, a new non-invasive body contouring procedure, at his practice - Advanced ...
... data from a retrospective cohort study showed that up to three quarters ... have a substantial adverse effect on major PD-related clinical and health economic ... Disease and Movement Disorders in Buenos Aires, Argentina ( June ... , "The ...
... leading publication on diversity and business, has recognized University Hospitals as a leader among ... , , ... Companies for Diversity based on results from an extensive questionnaire. This is the first ... , , ...
Cached Biology Technology:Dr. Suresh Koneru Introduces Zeltiq Non-Invasive Procedure For Fat Reduction 2Dr. Suresh Koneru Introduces Zeltiq Non-Invasive Procedure For Fat Reduction 3New Study Showed the Impact of Gastrointestinal Disorders in Patients With Parkinson's Disease 2New Study Showed the Impact of Gastrointestinal Disorders in Patients With Parkinson's Disease 3New Study Showed the Impact of Gastrointestinal Disorders in Patients With Parkinson's Disease 4Diversity Publication Names University Hospitals One of Top Hospital Systems in the Nation 2
(Date:9/2/2014)... blogs: Earthquake rupture through a U.S. suburb , ... California Davis in the hours and days after the ... understand why the earthquake caused so much damage in ... Earth blog, hosted by the American Geophysical Union. ... Rovers: The Next Places to Direct Our Curiosity ...
(Date:9/2/2014)... present the prestigious Parker/Gentry Award to Mr. Rhett A. ... awareness. The Parker/Gentry Award is given annually by the ... whose efforts have had a significant impact on preserving ... serve as a model to others. , Rhett Butler ... conservation news website that draws more than 2 million ...
(Date:9/2/2014)... In Bavaria, the Tithonian Konservat-Lagersttte of lithographic limestone ... discoveries of emblematic fossils from that area (for ... have found fossil insects in the French equivalent ... new species representing the oldest known water treader. ... equivalent Bavarian outcrops, fewer fossils have been obtained ...
Breaking Biology News(10 mins):This week From AGU: California earthquake, future Mars rovers, models underestimate ozone 2Exceptionally well preserved insect fossils from the Rhône Valley 2
... Research to be presented at the Annual Meeting of the ... society for research into all aspects of eating and drinking ... their pregnancy were at risk to develop obesity and type ... that both prenatal stress exposure and passive stress coping style ...
... make a person more susceptible to the lung infection ... , the online open-access journal of the American Society ... (METH) significantly enhanced colonization of the lungs by ... and the time to death in mouse models. ...
... mind that is, your happiness affects your genes, ... from UCLA,s Cousins Center for Psychoneuroimmunology and the University of ... What they found is that different types ... People who have high levels of what ...
Cached Biology News:Methamphetamine increases susceptibility to deadly fungal infection 2Methamphetamine increases susceptibility to deadly fungal infection 3Be happy: Your genes may thank you for it 2Be happy: Your genes may thank you for it 3
Goat polyclonal to Factor VIII, prediluted ( Abpromise for all tested applications). Antigen: Full length native protein (purified) (Human): Factor VIII from blood. Entrez GeneID: 2157 Sw...
Anti-Bcl-G (CT) Host: rabbit polyclonal Species Reactivity: human, mouse, rat Applications: WB, IHC Storage: 4C...
Affinity Purified Rabbit Anti-mouse sRANKL Biotinylated Polyclonal Antibody...
Polyclonal antiserum raised against conjugated L-isoleucine. Available as antiserum. Amino Acid Antibodies...
Biology Products: