Navigation Links
Killer pulses help characterize special surfaces
Date:9/23/2008

ric field enhancement is really big, it takes only a weak pulse to kill it," Dlott said. "If the molecule is in a very cold spot, then it takes a really big laser pulse to kill it."

Dlott, Fang and Seong demonstrated their technique by measuring the distribution of local enhancements for benzenethiolate molecules on a substrate of silver-coated nanospheres 330 nanometers in diameter.

To characterize the surface, the researchers first measured the initial Raman intensity. Then they put in a weak killer pulse, which destroyed the molecules in the hottest spots. After measuring the new Raman intensity, they put in a bigger pulse and destroyed the molecules in slightly colder spots. The researchers continued with bigger and bigger pulses until all the benzenethiolate molecules were destroyed.

"We found the hottest spots comprised just 63 molecules per million, but contributed 24 percent of the overall Raman intensity," Dlott said. "We also found the coldest spots contained 61 percent of the molecules, but contributed only 4 percent of the overall intensity."

Measurements like these, of the distribution of local site enhancements, will help researchers design better scattering surfaces for sensor applications.

Prior to this work, no one knew if the Raman intensity was dominated by a small number of hot molecules or a large number of cold ones. Dlott, Fang and Seong have answered that important scientific question; not just with a yes or no, but with a full determination of exactly how many molecules there are in each level of hot or cold.

"Now, when evaluating a new surface-enhanced Raman material, instead of knowing just the average intensity, we know the highest, the lowest, and everything in between," Dlott said.


'/>"/>

Contact: James E. Kloeppel
kloeppel@illinois.edu
217-244-1073
University of Illinois at Urbana-Champaign
Source:Eurekalert

Page: 1 2

Related biology technology :

1. Panel to Discuss the Far-Ranging Effects and Consequences of Heart Disease, Which is the Leading Killer in Both Men and Women in the United States
2. Experts and Representatives From Leading International Health-Care Organizations Call to Stop the Hypertension Pandemic, a Worldwide Silent Killer
3. New technique measures ultrashort laser pulses at focus
4. FDA Approves EOVIST(R) to Detect and Characterize Focal Liver Lesions
5. SportCoatings; The North American Booster Club Association (NABCA); the Coatings Specialist Group New Booster Program Goes High Tech With Invisible Antimicrobial Defense
6. ev3 and FoxHollow Announce Date for Special Meeting of FoxHollow Stockholders to Vote on Proposed Merger
7. Specialists Are Turning to Biologics Earlier in the Treatment of Psoriasis and Psoriatic Arthritis
8. Patient Treatment for Bipolar Disorder Varies Depending on Doctor Specialty; Well Designed Clinical Trials May Be The Answer
9. Ranbaxy to Consolidate Position in Biopharmaceuticals and Speciality Injectables Including Oncology
10. ZymoGenetics and Merck Serono Receive FDA Special Protocol Assessment for Atacicept Pivotal Study in Lupus Nephritis
11. The Parkinsons Disease Foundation Commemorates its 50th Anniversary with Special Scientific Symposium on Parkinsons Disease
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:8/26/2015)... N.J. , Aug. 26, 2015  Roka Bioscience, ... focused on providing advanced testing solutions for the detection ... CEO will present at the Sidoti & Company Emerging ... conference will be held at the New York Marriott ... presentation will be available through the investor relations section ...
(Date:8/26/2015)... SAN FRANCISCO , Aug. 26, 2015 /PRNewswire/ ... today that it has received a $1.5M Phase ... Health (NIH) to further develop its therapeutic agent ... unmet clinical need in end stage renal disease ... by the National Institute of Diabetes and Digestive ...
(Date:8/26/2015)... -- China Cord Blood Corporation (NYSE: CO ) ... of cord blood collection, laboratory testing, hematopoietic stem cell ... the Company has been informed that Magnum Opus 2 ... Mr. Yuen Kam, chairman of the board of directors ... "Shares") of  Excellent China Healthcare Investment Limited ("KKR SPV") ...
(Date:8/26/2015)... San Bruno, CA. (PRWEB) , ... August 26, 2015 , ... ... three major conferences to develop new business relationships with local sponsors in southern California. ... services to facilitate their drug development processes and regulatory pathways., , ...
Breaking Biology Technology:Symic Biomedical Awarded $1.5MM NIH Phase II SBIR Grant to Develop its Proteoglycan Mimetic Therapeutics to Reduce Vascular Access Failures in ESRD 2Symic Biomedical Awarded $1.5MM NIH Phase II SBIR Grant to Develop its Proteoglycan Mimetic Therapeutics to Reduce Vascular Access Failures in ESRD 3China Cord Blood Corporation Receives Notice of Transactions Regarding its 7% Senior Convertible Notes Due 2017 2China Cord Blood Corporation Receives Notice of Transactions Regarding its 7% Senior Convertible Notes Due 2017 3PRC Clinical To Attend Major Industry Conferences And Meet Sponsor Companies In The San Diego Biotech Hub 2PRC Clinical To Attend Major Industry Conferences And Meet Sponsor Companies In The San Diego Biotech Hub 3
... , Multiporator / Electroporator 2510 , , , , , , ... , Protocol No. 4308 915.512 04/2002 , , ... , , Microorganism , ... Cell type , Bacteria, gram negative, , ...
... , , , , , Multiporator , , , , ... Transfection Protocol , Protocol No. 4308 915.022 11/1999 , ... , , , Cell line ... Transfection with , Plasmid RSV/lacZ (in bidistilled H 2 O), ...
... , , , , , , Multiporator / Electroporator 2510 , , ... , Transformation Protocol , Protocol No. 4308 915.509 ... , , , , , , ... , Cell type , ...
Cached Biology Technology:Escherichia coli DH5 2Escherichia coli DH5 3COS-7 2Clostridium botulinum 2
(Date:8/17/2015)... -- NXT-ID, Inc. (NASDAQ: NXTD ) ("NXT-ID" or the ... mobile commerce market and creator of the Wocket® smart ... The new marketing campaign is being spearheaded by an ... ( http://amplitudemarketing.com/ ) and TPMG ( http://tmpg.com/ ). ... driven marketing and brand awareness and has a client ...
(Date:8/11/2015)... -- Today, ZUK announced its Android smartphone Z1, featuring ... revenues in 2015 that relate to sales of FPC1155 for this ... 2,200 MSEK for 2015. Jörgen Lantto, CEO of FPC, ... smartphone manufacturer in China and we ... 155 for Z1 , ...
(Date:8/6/2015)... Calif. , Aug. 6, 2015 ... developer of human interface solutions, today announced collaboration ... technologies on Windows 10. Microsoft leveraged Synaptics, deep ... the operating system. Through stringent ... are fully certified with Microsoft,s Precision TouchPad (PTP) ...
Breaking Biology News(10 mins):NXT-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 3FPC's Touch Fingerprint Sensor FPC1155 in ZUK's Smartphone Z1 2Synaptics Chosen for Human Interface Co-Development on Windows 10 2
... Alternating hemiplegia of childhood (AHC) is a very rare ... the body and then the other in devastating bouts ... difficulty walking are common among patients with this diagnosis. ... discovered that mutations in one gene cause the disease ...
... Branch at Galveston researchers have been awarded a two-year, $1.25 ... of custom-growing human lung tissue to make a three-dimensional model ... the size of a dime, will form the core of ... testing new vaccines and drugs and studying disease processes in ...
... This press release is available in German . ... perceive our world in a self-reflective manner is difficult to ... sleep, however, we are not. But there are people, known ... sleep. Studies employing magnetic resonance tomography (MRT) have now been ...
Cached Biology News:Gene discovery set to help with mysterious paralysis of childhood 2Gene discovery set to help with mysterious paralysis of childhood 3UTMB scientists awarded NIH grant for lab-grown lung tissue project 2The seat of meta-consciousness in the brain 2
Mouse monoclonal antibody raised against a partial recombinant ENTPD5. NCBI Entrez Gene ID = ENTPD5...
Mouse monoclonal antibody raised against a partial recombinant TTC3. NCBI Entrez Gene ID = TTC3...
... Protein Staining Solution stains proteins ... electrophoresis (detection limit >= 8 ng ... including washing and destaining processes can ... staining of gel (20 min), proteins ...
Mouse polyclonal antibody raised against a partial recombinant SYT4. NCBI Entrez Gene ID = 6860...
Biology Products: