Navigation Links
Almost as sensitive as a dog's nose
Date:8/28/2013

Scientists at ETH Zurich and the Lawrence Livermore National Laboratory (LLNL) in California have developed an innovative sensor for surface-enhanced Raman spectroscopy (SERS). Thanks to its unique surface properties at nanoscale, the method can be used to perform analyses that are more reliable, sensitive and cost-effective. In experiments with the new sensor, the researchers were able to detect a certain organic species (1,2bis(4-pyridyl)ethylene, or BPE) in a concentration of a few hundred femtomoles per litre. A 100 femtomolar solution contains around 60 million molecules per litre.

Until now, the detection limit of common SERS systems was in the nanomolar range, i.e. one billionth of a mole. The results of a study conducted by Hyung Gyu Park, Professor of Energy Technology at ETH Zurich, and Tiziana Bond, Capability Leader at LLNL, were published this week as a cover article in the scientific journal Advanced Materials.

Raman spectroscopy takes advantage of the fact that molecules illuminated by fixed-frequency light exhibit 'inelastic' scattering closely related to the vibrational and rotational modes excited in the molecules. Raman scattered light differs from common Rayleigh scattered light in that it has different frequencies than that of the irradiating light and produces a specific frequency pattern for each substance examined, making it possible to use this spectrum information as a fingerprint for detecting and identifying specific substances. To analyse individual molecules, the frequency signals must be amplified, which requires that the molecule in question either be present in a high concentration or located close to a metallic surface that amplifies the signal. Hence the name of the method: surface-enhanced Raman spectroscopy.

Amplified signals for improved reproducibility

"This technology has been around for decades," explains Ali Altun, a doctoral student in the group led by Park at the Instit
'/>"/>

Contact: Hyung Gyu Park
parkh@ethz.ch
41-446-329-460
ETH Zurich
Source:Eurekalert

Page: 1 2 3 4

Related biology news :

1. New report confirms almost half of Africas lions facing extinction
2. Mutant champions save imperiled species from almost-certain extinction
3. Researchers design sensitive new microphone modeled on fly ear
4. More accurate, sensitive DNA test allows early identification of fungus causing WNS
5. Why a hereditary anemia is caused by genetic mutation in mechanically sensitive ion channel
6. New study reveals how sensitive US East Coast regions may be to ocean acidification
7. Sodium transporter appears likely target for treating salt-sensitive hypertension
8. The worlds most sensitive plasmon resonance sensor inspired by ancient Roman cup
9. Touch-sensitive plastic skin heals itself
10. Tactile croc jaws more sensitive than human fingertips
11. Ultrasensitive photon hunter
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:8/24/2015)... August 24, 2015 The consulting company ... largest biometrics manufacturer DERMALOG and its customized solutions and products ... Biometrics Company of the Year Award". DERMALOG is particularly successful ... .   -Cross reference: Picture is available at ... On Thursday evening, in South Africa,s ...
(Date:8/20/2015)... -- NXT-ID, Inc. (NASDAQ: NXTD ) ("NXT-ID" or ... growing mobile commerce market and creator of the Wocket® ... Alliance and the EMV Migration Forum.  ... Alliance Latin America (SCALA) Chapter provides NXT-ID, Inc. direct ... promoting adoption of smart card technology. To ...
(Date:8/17/2015)... Aug. 17, 2015  NXT-ID, Inc. (NASDAQ: NXTD ... focused on the growing mobile commerce market and creator ... campaign for Q4 2015. The new marketing campaign is ... of Amplitude Marketing Group ( http://amplitudemarketing.com/ ) and TPMG ... a leader in retail driven marketing and brand awareness ...
Breaking Biology News(10 mins):Frost & Sullivan Honors DERMALOG with Biometrics Prize for Achievements in Africa 2Frost & Sullivan Honors DERMALOG with Biometrics Prize for Achievements in Africa 3NXT-ID, Inc. Joins Smart Card Alliance and EMV Migration Forum 2NXT-ID, Inc. Joins Smart Card Alliance and EMV Migration Forum 3NXT-ID, Inc. Joins Smart Card Alliance and EMV Migration Forum 4NXT-ID, Inc. Launches Sales Campaign for Wocket Smart Wallet with Award Winning Marketing Team 2NXT-ID, Inc. Launches Sales Campaign for Wocket Smart Wallet with Award Winning Marketing Team 3
... for centuries that copper is a potent weapon against ... serious urinary tract infections "know" this, too, and steal ... them. Blocking this thievery with a drug ... according to researchers at Washington University School of Medicine ...
... Calif.) An evaluation of national data by UC Davis researchers ... higher risk of death. When compared to those with ... risk of death during a follow-up period of six years. People ... if they also had diabetes or hypertension. The findings, ...
... be a breakthrough in the practical application of epigenetic ... that those with osteoarthritis have a signature epigenetic change ... gene that produces a destructive enzyme called MMP13. This ... destruction of joint cartilage, making MMP13 and the epigenetic ...
Cached Biology News:Urinary tract infections steal from hosts' defense arsenals 2UC Davis study finds that above-normal weight alone does not increase the short-term risk of death 2UC Davis study finds that above-normal weight alone does not increase the short-term risk of death 3Scientists discover an epigenetic cause of osteoarthritis 2
(Date:9/1/2015)... ... September 01, 2015 , ... Research conducted by ... Angeles, Boston University School of Medicine, Frederick National Laboratory for Cancer Research, and ... first multidisciplinary Open Access journal. , Christopher Ryan PhD, of Synedgen, and ...
(Date:8/31/2015)... 2015 /PRNewswire/ - BIOREM Inc. (TSXV: BRM) ("Biorem" or "the ... are for air emission abatement projects in North ... large order for a municipality in the Southern ... competitor,s system that failed to meet the customer,s requirements. This demonstrates ... Derek S. Webb , President and Chief Executive Officer.  ...
(Date:8/31/2015)... -- Research and Markets ( http://www.researchandmarkets.com/research/k6lcp2/mexico_biomedical ) has announced ... - Growth, Trends & Forecasts (2014-2020)" report to ... Sensors market is estimated at $0.20 billion by 2018 ... The near future will bring biomedical sensors ... individual. These sensors can be set to trigger alerts ...
(Date:8/31/2015)... 31, 2015 /PRNewswire/ - Portage Biotech Inc. ("Portage" or ... is pleased to announce that its wholly owned subsidiary, ... candidate, PPL-003, to an Investigational New Drug (IND) application ... uveitis.  PPL recently completed a study in a rat ... achieved highly significant efficacy and a more rapid onset ...
Breaking Biology Technology:Synedgen’s Director for Pharmaceutical Manufacturing Publishes New Research 2Synedgen’s Director for Pharmaceutical Manufacturing Publishes New Research 3Mexico Biomedical Sensors Market Report 2015-2020 2Portage's PPL will advance its lead candidate PPL-003 to an IND for dry eye disease and uveitis 2Portage's PPL will advance its lead candidate PPL-003 to an IND for dry eye disease and uveitis 3
... Engineering News (Volume 26, No. 11) , , ... one's own shop, even for a period longer than a year, ... filed later to protect the invention. , ,This rule was pronounced ... patent asserted that the patent was invalid due to prior public ...
... Wis. - A new combination of technical solutions ... publishing, broadcasting, and graphic design to transfer high-definition video ... joint solution promises Apple Mac OS X users in ... reduce the time demand for specialized data transfer tasks. ...
... the biotech industry? The July 2006 edition of MedAd News ... birthday this year. On Aug, 23, 2004, I wrote an article ... Boston, Geneva, or Chicago? " , ,In this article I reviewed ... that date the industry back to the 1970s and perhaps the ...
Cached Biology Technology:With patents and research tools, when is private really public? 2With patents and research tools, when is private really public? 3With patents and research tools, when is private really public? 4With patents and research tools, when is private really public? 5Small Tree branches out with affordable video 2At 30, biotech is an industry at a crossroads 2At 30, biotech is an industry at a crossroads 3At 30, biotech is an industry at a crossroads 4At 30, biotech is an industry at a crossroads 5At 30, biotech is an industry at a crossroads 6At 30, biotech is an industry at a crossroads 7