Navigation Links
Study shows nanoshells ideal as chemical nanosensors

are ball-shaped and consist of a core of non-conducting glass that is covered by a metallic shell, typically either gold or silver. The metal shell "captures" passing light and focuses it, a property that directly leads to the enormous Raman enhancements observed. Furthermore, nanoshells can be "tuned" to interact with specific wavelengths of light by varying the thickness of their shells. This tunability allows for the Raman enhancements to be optimized for specific wavelengths of light. Discovered by Halas at Rice in the 1990s, nanoshells are already being developed for applications including cancer diagnosis, cancer therapy, diagnosis and testing for proteins associated with Alzheimer's disease, drug delivery and rapid whole-blood immunoassay. In the current study, Halas and former graduate student Joseph B. Jackson, now with Nanospectra Biosciences, Inc., created thin films of nanoshells deposited atop plates of glass. Films with various densities were studied, as were films containing both silver and gold nanoshells. Through painstaking analysis, Halas and Jackson showed that the nanoshells' 10 billion-fold increase in Raman effect was due entirely to the interactions of light with individual nanoshells. This is markedly different from the pattern exhibited by pure gold or silver nanoparticle films. In that case, the Raman enhancement is an aggregate effect, due to the presence of localized "junctions" or "hot spots" between metallic regions of the metallic film substrate. The finding that individual nanoshells can vastly enhance the Raman effect opens the door for biosensor designs that use a single nanoshell, something that could prove useful for engineers who are trying to probe the chemical processes within small structures such as individual cells, or for the detection of very small amounts of a material, like a few molecules of a deadly biological or chemical agent.
'"/>

Source:Eurekalert


Page: 1 2

Related biology news :

1. Novel Asthma Study Shows Multiple Genetic Input Required; Single-gene Solution Shot Down
2. Emory Study Tests Bone Marrow Stem Cells to Improve Circulation in Legs
3. UCLA Study Shows One-Third of Drug Ads in Medical Journals Do Not Contain References Supporting Medical Claims
4. Study Demonstrates Gene Expression Microarrays are Comparable and Reproducible
5. Study Links Ebola Outbreaks To Animal Carcasses
6. Breakthrough Microarray-based Technology for the Study of Cancer
7. NYU Study Reveals How Brains Immune System Fights Viral Encephalitis
8. Study finds more than one-third of human genome regulated by RNA
9. Leukemia Drug Breakthrough Study In New England Journal Of Medicine
10. Study identifies predictors of HIV drug resistance in patients beginning triple therapy
11. New Study from Affymetrix Laboratories Points to Changing View of How Genome Works
Post Your Comments:
*Name:
*Comment:
*Email:
TAG: Study shows nanoshells ideal chemical nanosensors

(Date:7/9/2014)... era of increasing concern about the prevalence of ... a promising new pathway to disabling disease: blocking ... The scientists showed how bacterial siderophore, a small ... to fan bacterial growth as well as ... this infection process. Their findings appear in a ...
(Date:7/9/2014)... many backyard cooks are turning to more healthful alternatives ... fat can sometimes mean low satisfaction. Now researchers are ... low-fat wieners that are made with olive oil rather ... Journal of Agricultural and Food Chemistry . , ... have come to expect just the right amount of ...
(Date:7/9/2014)... fossil from China challenges the commonly held belief that ... ability to fly. The birdlike fossil is actually not ... remains of a tiny tree-climbing animal that could glide, ... in Blanding, Utah, and Alan Feduccia of the University ... Journal of Ornithology . , The fossil of the ...
Breaking Biology News(10 mins):Bacteria hijack plentiful iron supply source to flourish 2Researchers declassify dinosaurs as being the great-great-grandparents of birds 2
... American Society for Microbiology (ASM) USFCC/J. Roger Porter ... Ph.D., Professor Emeritus, Center for Ecology and Evolutionary ... efforts by a scientist who has demonstrated the ... stewardship activities for a major resource used by ...
... ATLANTA Humans, from ancient exchanges of food to modern ... they couldn,t achieve on their own. It,s the basis of the ... each party will receive a payoff in return for taking a ... the recent collapse of the housing market, the economy slows. ...
... muscle wasting that afflicts cancer or AIDS patients, the body ... liberate amino acids. In a new study published online June ... the Journal of Cell Biology ( www.jcb.org ), ... is a more ordered process than was previously thought. These ...
Cached Biology News:Researchers shed light on trading behavior in animals -- and humans 2Muscle atrophy through thick but not thin 2
(Date:1/15/2014)... The Microcompetition with Foreign DNA theory explains how latent ... viruses is the Epstein Barr Virus (EBV), and one of ... a chronic inflammatory disease that destroys the body’s joints. As ... have high concentrations of EBV DNA in their bodies (1). ...
(Date:1/15/2014)... TaiGen Biotechnology Company, Limited ("TaiGen") today announced that ... leading Russian pharmaceutical company, to develop and commercialize nemonoxacin ... , Turkey and other ... novel antibiotic for the treatment of bacterial infections including ...
(Date:1/14/2014)... BURLINGAME, Calif. , Jan. 14, 2014 As pet owners ... no doubt many of them wrote: "Take better care of my ... and even designer clothes and top-brand carrying cases to take the ... Pet parents might also feel compelled to buy some pricey toys ...
(Date:1/14/2014)... In recent years, growing suspicion about the ... development and promotion has led to unprecedented levels of ... concerns about the insidious impact of commercialization of research, ... to the world’s biggest pharmas for illegal marketing activities, ...
Breaking Biology Technology:Study: Rheumatoid Arthritis (RA) Patients Have EBV; The CBCD Says this is Consistent with Microcompetition 2Study: Rheumatoid Arthritis (RA) Patients Have EBV; The CBCD Says this is Consistent with Microcompetition 3TaiGen Biotechnology Signed Exclusive License Agreement with R-Pharm for Nemonoxacin (Taigexyn(R)) 2TaiGen Biotechnology Signed Exclusive License Agreement with R-Pharm for Nemonoxacin (Taigexyn(R)) 3TaiGen Biotechnology Signed Exclusive License Agreement with R-Pharm for Nemonoxacin (Taigexyn(R)) 4New Year's Resolution: Give Pets the Gift of Top-Notch Health Care 2The Sunshine Act: Necessary Regulation or Unnecessary Dysregulation? New Life Science Webinar Hosted by Xtalks and IRB Services 2The Sunshine Act: Necessary Regulation or Unnecessary Dysregulation? New Life Science Webinar Hosted by Xtalks and IRB Services 3
... WALTHAM, Mass., Nov. 10, 2011 Interleukin Genetics, Inc. ... the third quarter ended September 30, 2011. Total ... $765,000, compared to $545,000 for the same period in the ... revenue. Research and development expenses were $325,000 ...
... Inc., a global, full-service testing laboratory with more than ... organs, cells, tissues and implantable biologic products and devices, ... private companies, as judged by the annual ColoradoBiz ... Top 250 Private Companies list is an annual ranking ...
... England Biolabs (NEB), in its continuing commitment to open ... database covering DNA polymerase biochemistry, genetics and structural biology. ... and maintained by NEB), Polbase summarizes the information that ... it easy for researchers to interrogate and use. Polbase ...
Cached Biology Technology:Interleukin Genetics Reports Third Quarter 2011 Financial Results 2Interleukin Genetics Reports Third Quarter 2011 Financial Results 3Interleukin Genetics Reports Third Quarter 2011 Financial Results 4LABS, Inc. Among Colorado's Top Private Companies 2New England Biolabs Introduces Polbase, an Information Repository of Scientific Data for Polymerase Researchers 2