Navigation Links
Lawrence Livermore researchers unveil carbon nanotube jungles to better detect molecules
Date:11/6/2013

LIVERMORE, Calif. Researchers from Lawrence Livermore National Laboratory (LLNL) and the Swiss Federal Institute of Technology (ETH) in Zurich have developed a new method of using nanotubes to detect molecules at extremely low concentrations enabling trace detection of biological threats, explosives and drugs.

The joint research team, led by LLNL Engineer Tiziana Bond and ETH Scientist Hyung Gyu Park, are using spaghetti-like, gold-hafnium-coated carbon nanotubes (CNT) to amplify the detection capabilities in surface-enhanced Raman spectroscopy (SERS).

SERS is a surface-sensitive technique that enhances the inelastic scattering of photons by molecules adsorbed on rough metal surfaces or by nanostructures.

Bond and her collaborators are using metal-coated nanotubes bunched together like a jungle canopy to amplify the signals of both the incident and Raman scattered light by exciting local electron plasmons.

Their real breakthrough, however, is discovering the use of an intermediate dielectric coating (hafnium) to block the quenching of the free electrons in the metal by the CNTs, allowing the nanotubes to function uninhibited.

By preserving the electrons and enhancing the light through the use of nanotube jungles, the team is able to significantly increase the SERS' detection sensitivities in CNTs structures.

The hafnium coating enables the bunching of gold nanotubes that creates a thick canopy full of sensitive spots for detection. The nanotubes enable incident light to be trapped and focused at the numerous contact points and crevices, allowing the Raman-scattered light to pass through. This enables portable Raman devices to detect and identify specific airborne substances randomly.

"This is a very important discovery in our efforts to improve the use of SERS devices," Bond said. "We gained this valuable knowledge through multidisciplinary basic research and approaching the problem with a rati
'/>"/>

Contact: Ken Ma
ma28@llnl.gov
925-423-7602
DOE/Lawrence Livermore National Laboratory
Source:Eurekalert

Page: 1 2

Related biology news :

1. The American Society for Microbiology honors Lawrence Corey
2. Lawrence Livermore helps find link to arsenic-contaminated groundwater
3. Student named universitys first Lawrence scholar, researching at national laboratory
4. Study by UC Santa Barbara researchers suggests that bacteria communicate by touch
5. UC Santa Barbara researchers discover genetic link between visual pathways of hydras and humans
6. Researchers attempt to solve problems of antibiotic resistance and bee deaths in one
7. UNH researchers find African farmers need better climate change data to improve farming practices
8. Ottawa researchers to lead world-first clinical trial of stem cell therapy for septic shock
9. Researchers uncover molecular pathway through which common yeast becomes fungal pathogen
10. Researchers print live cells with a standard inkjet printer
11. Columbia Engineering and Penn researchers increase speed of single-molecule measurements
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:9/18/2014)... Mass. A novel robotic system that can operate ... being tested as part of a biomedical research partnership ... the aim of determining if the robot, in conjunction ... faster, more accurate, less costly, and less discomforting for ... to deliver prostate cancer therapies with greater precision. , ...
(Date:9/18/2014)... a "frequent flyers" program, fruit flies surely would be ... hosted increasing numbers of fruit fly research studies. One ... April, and another is scheduled launch to the station ... in December. , Fruit flies are biomedical research models ... Model organisms can reveal the basis for health and ...
(Date:9/18/2014)... fall foliage season that prompts millions of Americans to undertake ... and possibly last a little longer within a century, according ... peeping in some areas of the United States as summer ... in the journal Global Ecology and Biogeography . For ... is the state tree of New Hampshire could change ...
Breaking Biology News(10 mins):Trial begins for MRI-compatible robot designed to improve accuracy of prostate biopsies 2Trial begins for MRI-compatible robot designed to improve accuracy of prostate biopsies 3Trial begins for MRI-compatible robot designed to improve accuracy of prostate biopsies 4Trial begins for MRI-compatible robot designed to improve accuracy of prostate biopsies 5Buzzing with activity: Fruit flies orbit Earth for science 2Buzzing with activity: Fruit flies orbit Earth for science 3Buzzing with activity: Fruit flies orbit Earth for science 4Fall foliage season may be later, but longer on warmer Earth 2Fall foliage season may be later, but longer on warmer Earth 3Fall foliage season may be later, but longer on warmer Earth 4
... 2010) Van Andel Research Institute (VARI) ... initiation and development of prostate cancer interact at the ... the disease. One of the proteins, androgen receptor, ... The other, steroid receptor coactivator-3 (SRC3), was originally ...
... S.C. As peach trees go, it doesn,t look much ... Research Farm, but appearances can be deceiving. This one, a ... a standout in the orchard. Its DNA its genetic ... scientists, enabling further research to identify beneficial traits to grow ...
... , This release is available in Spanish ... shoring up the defenses of U.S. varieties against Fusarium ... (FHB) disease. According to Agricultural Research Service (ARS) plant ... U.S. wheat varieties is primarily based on the Chinese wheat ...
Cached Biology News:VARI study could improve treatments for prostate cancer 2Researchers sequence DNA of peach tree at Clemson University 2Researchers sequence DNA of peach tree at Clemson University 3Diverse wheat tapped for antifungal genes 2
(Date:9/19/2014)... yields to disease risks, the biological characteristics people care ... as for heightthe textbook example of a complex traitattributes ... by multiple genetic and environmental influences, making it challenging ... genes, geneticists typically mate two individuals that differ in ... mouseand then study their descendents, looking for genes that ...
(Date:9/19/2014)... Jose, California (PRWEB) September 19, 2014 ... Nanotechnology and its potential to revolutionize the world ... agencies, multinational corporations and small start-ups. The early ... funded research projects largely due to the high ... investments. Government budgets earmarked for this evolving technology ...
(Date:9/19/2014)... , Sept. 19, 2014  Nektar Therapeutics (NASDAQ: ... preclinical studies characterizing the analgesic profiles of a ... opioid receptor agonist molecules. The preclinical research candidates ... chemistry platform. The analgesic properties of ... medical literature. 1,2 Kappa opioid receptors are ...
(Date:9/19/2014)... Barnhardt Manufacturing Company has ... Organic Cotton . The USDA Certified Biobased Product ... ingredients meets or exceeds levels set by USDA. Biobased ... or in significant part of agricultural, forestry, or marine ... cotton to be immediately identified as a USDA certified ...
Breaking Biology Technology:Want to link genes to complex traits? Start with more diversity 2Growing R&D Investments & Developments in Nanomaterials to Drive the Global Nanotechnology Market, According to New Report by Global Industry Analysts, Inc. 2Growing R&D Investments & Developments in Nanomaterials to Drive the Global Nanotechnology Market, According to New Report by Global Industry Analysts, Inc. 3Growing R&D Investments & Developments in Nanomaterials to Drive the Global Nanotechnology Market, According to New Report by Global Industry Analysts, Inc. 4Nektar Presents Positive Preclinical Data on Oral, Peripherally-Acting Kappa Agonist Molecules at 2014 American Academy of Pain Management Meeting 2Nektar Presents Positive Preclinical Data on Oral, Peripherally-Acting Kappa Agonist Molecules at 2014 American Academy of Pain Management Meeting 3Nektar Presents Positive Preclinical Data on Oral, Peripherally-Acting Kappa Agonist Molecules at 2014 American Academy of Pain Management Meeting 4Nektar Presents Positive Preclinical Data on Oral, Peripherally-Acting Kappa Agonist Molecules at 2014 American Academy of Pain Management Meeting 5Barnhardt Manufacturing Company Earns USDA Certified Biobased Product Certification and Label for Organic Cotton 2
... , , ... As the study of protein biomarkers ... based on protein pathway information and discovery-based proteomics experiments. Even larger ... on microarray-based gene expression studies or other genomic information. , ...
... Purpose , ... and non-nucleoside reverse transcriptase inhibitor (NNRTI) antiretroviral drugs is of ... intra-individual metabolism variability. To be of practical use, it is ... is fast and easy to perform, with minimal sample preparation, ...
... Introduction , ... radioactively labeled using either endlabeled primers or by the ... results produced by these two labeling methods are highly ... or high secondary structure can cause DNA polymerases to ...
Cached Biology Technology:Multiplexed Quantitative Peptide Assays for Protein Biomarkers of Cardiovascular Disease in Human Plasma 2Multiplexed Quantitative Peptide Assays for Protein Biomarkers of Cardiovascular Disease in Human Plasma 3Multiplexed Quantitative Peptide Assays for Protein Biomarkers of Cardiovascular Disease in Human Plasma 4Multiplexed Quantitative Peptide Assays for Protein Biomarkers of Cardiovascular Disease in Human Plasma 5A simple and rapid LC-MS/MS method for the simultaneous determination of nine antiretroviral drugs commonly used in Europe (protease Inhibitors and non-nucleoside reverse transcriptase inhibitors) 2A simple and rapid LC-MS/MS method for the simultaneous determination of nine antiretroviral drugs commonly used in Europe (protease Inhibitors and non-nucleoside reverse transcriptase inhibitors) 3A simple and rapid LC-MS/MS method for the simultaneous determination of nine antiretroviral drugs commonly used in Europe (protease Inhibitors and non-nucleoside reverse transcriptase inhibitors) 4A simple method to sequence from bacterial colonies using [a-33P] radiolabeled ddNTPs and Thermo Sequenase 2A simple method to sequence from bacterial colonies using [a-33P] radiolabeled ddNTPs and Thermo Sequenase 3
... is the first biological reagent ... them, and not just by ... only anti-mycoplasma agent that can ... stocks directly. The cytotoxicity of ...
... ester can be used to ... The covalently bound acridinium NHS ... the presence of hydrogen peroxide. ... be used as a detection ...
... assay (EMSA) is a powerful tool for ... gel shift or gel retardation, the assay ... subjected to electrophoresis, free DNA will migrate ... LightShift Chemiluminescent EMSA Kit is a nonradioactive ...
... 500 Series is a sophisticated ... most advanced technologies available. The ... testing, powerful software and a ... researchers optimize their overall workflow ...
Biology Products: