Navigation Links
Nanoparticles reach new peaks
Date:1/3/2013

HOUSTON (Jan. 3, 2013) Plasmonic gold nanoparticles make pinpoint heating on demand possible. Now Rice University researchers have found a way to selectively heat diverse nanoparticles that could advance their use in medicine and industry.

Rice scientists led by Dmitri Lapotko and Ekaterina Lukianova-Hleb showed common gold nanoparticles, known since the 19th century as gold colloids, heat up at near-infrared wavelengths as narrow as a few nanometers when hit by very short pulses of laser light. The surprising effect reported in Advanced Materials appears to be related to nonstationary optical excitation of plasmonic nanoparticles. Plasmons are free electrons on the surface of metals that become excited by the input of energy, typically from light. Moving plasmons can transform optical energy into heat.

"The key idea with gold nanoparticles and plasmonics in general is to convert energy," Lapotko said. "There are two aspects to this: One is how efficiently you can convert energy, and here gold nanoparticles are world champions. Their optical absorbance is about a million times higher than any other molecules in nature.

"The second aspect is how precisely one can use laser radiation to make this photothermal conversion happen," he said. Particles traditionally respond to wide spectra of light, and not much of it is in the valuable near-infrared region. Near-infrared light is invisible to water and, more critically for biological applications, to tissue.

"This was the problem," Lapotko said. "All nanoparticles, beginning with solid gold colloids and moving to more sophisticated, engineered gold nanoshells, nanorods, cages and stars, have very wide spectra, typically about 100 nanometers, which means we were allowed to use only one type of nanoparticle at a time. If we tried to use different types, their spectra overlapped and we did not benefit from the high tunability of lasers."

The discovery allows
'/>"/>

Contact: Mike Williams
mikewilliams@rice.edu
713-348-6728
Rice University
Source:Eurekalert  

Page: 1 2 3

Related biology news :

1. Study reports iron oxide nanoparticles effective for labeling human endothelial cells
2. Synthetic and biological nanoparticles combined to produce new metamaterials
3. UC Davis researchers develop new drug delivery system for bladder cancer using nanoparticles
4. Nanoparticles reboot blood flow in brain
5. Nanoparticles added to platelets double internal injury survival rate
6. Oh, my stars and hexagons! DNA code shapes gold nanoparticles
7. Paints and coatings containing bactericidal agent nanoparticles combat marine fouling
8. Palladium-gold nanoparticles clean TCE a billion times faster than iron filings
9. From pomegranate peel to nanoparticles
10. NIST/UMass study finds evidence nanoparticles may increase plant DNA damage
11. Hybrid copper-gold nanoparticles convert CO2
Post Your Comments:
*Name:
*Comment:
*Email:
Related Image:
Nanoparticles reach new peaks
(Date:5/11/2015)... , May 11, 2015  Synaptics Incorporated ... human interface solutions, today announced the appointment of ... and Chief Financial Officer, reporting to Rick ... Synaptics, current Chief Financial Officer, Kathleen Bayless ... Mr. Ali brings extensive financial ...
(Date:5/7/2015)... May 7, 2015 Fingerprint ... FPC1022 and FPC1035, FPC,s smallest touch fingerprint sensors ... mainly considered for integration on the backside of ... OEMs increased possibilities to integrate touch fingerprint sensors ... also improves possibilities for module manufacturers to customize ...
(Date:4/27/2015)... Fla. , Apr. 27, 2015 Profile ... access control and security systems is pleased to announce ... company as a consultant and member of its scientific ... is widely known as a thought leader in technology-enhanced ... Learning Technology Group, and has published studies and books ...
Breaking Biology News(10 mins):Synaptics Appoints Wajid Ali as Senior Vice President and Chief Financial Officer 2FPC Introduces its Smallest Touch Fingerprint Sensors to Date 2Profile Solutions Names Medicinal Cannabis, Agriculture and Technology Expert Dr. Gerry Bedore to its Scientific Advisory Board 2Profile Solutions Names Medicinal Cannabis, Agriculture and Technology Expert Dr. Gerry Bedore to its Scientific Advisory Board 3Profile Solutions Names Medicinal Cannabis, Agriculture and Technology Expert Dr. Gerry Bedore to its Scientific Advisory Board 4
... aimed at protecting human health by improving how chemicals ... test 10,000 compounds for potential toxicity. The compounds cover ... food additives, chemicals found in industrial processes, and human ... is publicly available at http://www.epa.gov/ncct/dsstox . Testing ...
... monitoring firefighters working at prescribed burns in the southeastern ... decreased with successive days of exposure to smoke and ... decline in lung function across work seasons," said Olorunfemi ... the study published recently in the journal Inhalation ...
... game players have helped significantly advance our understanding of ... and cancer over the past year. They are the ... Jrme Waldispuhl of the McGill School of Computer Science ... casual game players to contribute to scientific research by ...
Cached Biology News:US Tox21 to begin screening 10,000 chemicals 2US Tox21 to begin screening 10,000 chemicals 3UGA study documents lung function declines in firefighters working at prescribed burns 2Video game players advancing genetic research 2
(Date:5/29/2015)... SILVER SPRING, Md. and RESEARCH TRIANGLE ... Therapeutics Corporation (NASDAQ: UTHR ) announced today that ... United Therapeutics, will provide an overview and update on the ... New York City . The ... on Thursday, June 4, 2015, at 11:00 AM Eastern Time, ...
(Date:5/28/2015)... , May 28, 2015 ... has announced the addition of Jain PharmaBiotech,s ... Technologies, Markets, and Companies" to their ... This report deals with therapeutic ... at improving patient care by monitoring drug ...
(Date:5/28/2015)... 2015 Research and Markets( http://www.researchandmarkets.com/research/6cg3zw/cell_therapy ) ... report "Cell Therapy - Technologies, Markets and ... report describes and evaluates cell therapy technologies and ... important role in the practice of medicine. Hematopoietic ... bone marrow transplants. Role of cells in drug ...
(Date:5/28/2015)... DryLet, LLC a biotechnology company providing ... animal waste reduction, bioremediation, wastewater treatment, aquaculture and ... plants and restaurant kitchen settings, announced today it ... 3-5 in Des Moines, Iowa. , ManureMagicâ„¢ was ... Journal article because of its industry-leading qualities and ...
Breaking Biology Technology:Global Therapeutic Drug Monitoring Market 2015-2024 2Global Cell Therapy Market 2015-2020 - Technologies, Markets and Companies 2DryLet to Showcase Patented ManureMagicâ„¢ at the 2015 World Pork Expo, June 3-5 in Des Moines, Iowa 2
... Inclinix, Inc. has announced today that it has ... (Nasdaq: DATA ) to offer the most ... device companies globally. , ... DATATRAK,s eClinical(TM) platform to enhance its services as a ...
... Md., April 30 /PRNewswire/ -- ... company developing novel, proprietary antibodies for the treatment of ... will host a conference call and audio webcast on ... (3:00 pm Central European Time) to discuss its financial ...
... Inc. (NASDAQ: AEZS , TSX: AEZ), a ... will announce its first quarter 2009 financial and operating ... The Company will host a conference call and webcast ... 3:30 p.m., Eastern Time. , Participants may access the ...
Cached Biology Technology:DATATRAK International, Inc. Forms Strategic Partnership with Inclinix, Inc. 2DATATRAK International, Inc. Forms Strategic Partnership with Inclinix, Inc. 3DATATRAK International, Inc. Forms Strategic Partnership with Inclinix, Inc. 4Micromet, Inc. to Host Conference Call and Webcast to Report First Quarter 2009 Financial Results on May 6, 2009 2Micromet, Inc. to Host Conference Call and Webcast to Report First Quarter 2009 Financial Results on May 6, 2009 3Micromet, Inc. to Host Conference Call and Webcast to Report First Quarter 2009 Financial Results on May 6, 2009 4
... anti-Human Alpha 1 Acid Glycoprotein ... Goats were immunized with ... in Freund's adjuvant. The ... to ensure specificity. For ...
...
... Development kit contains the basic components required ... measure natural and recombinant canine Monocyte Chemotactic ... and serum.1 Each kit contains sufficient materials ... plates, provided that the following conditions are ...
Mouse monoclonal [LPL4A.1] to Plastin L ( Abpromise for all tested applications). SwissProtID: P13796...
Biology Products: