Quantcast

Latest Surface plasmon resonance Stories

2012-03-21 15:40:17

Positive identification of plasmons in nano particles could open new engineering possibilities at the nanoscale The physical phenomenon of plasmon resonances in small metal particles has been used for centuries. They are visible in the vibrant hues of the great stained-glass windows of the world. More recently, plasmon resonances have been used by engineers to develop new, light-activated cancer treatments and to enhance light absorption in photovoltaics and photocatalysis. "The...

2011-09-23 12:01:39

Researchers at Chalmers University of Technology have built a very simple nanoantenna that directs red and blue colors in opposite directions, even though the antenna is smaller than the wavelength of light. The findings — published in the online journal Nature Communications this week — can lead to optical nanosensors being able to detect very low concentrations of gases or biomolecules. A structure that is smaller than the wavelength of visible light (390-770 nanometers)...

2011-06-16 21:34:36

Berkeley Lab plasmon rulers may offer unprecedented view of critical biological events The world's first three-dimensional plasmon rulers, capable of measuring nanometer-scale spatial changes in macrmolecular systems, have been developed by researchers with the U.S. Department of Energy (DOE)'s Lawrence Berkeley National Laboratory (Berkeley Lab), in collaboration with researchers at the University of Stuttgart, Germany. These 3D plasmon rulers could provide scientists with unprecedented...

da5d823fb3f50021162ae893e3c21c47
2011-05-12 11:20:24

Nanoparticles of silver are being found increasingly in the environment"”and in environmental science laboratories. Because they have a variety of useful properties, especially as antibacterial and antifungal agents, silver nanoparticles increasingly are being used in a wide variety of industrial and consumer products. This, in turn, has raised concerns about what happens to them once released into the environment. Now a new research paper* adds an additional wrinkle: Nature may be...

2011-01-24 15:30:49

Despite the sophistication and range of contemporary microscopy techniques, many important biological phenomena still elude the precision of even the most sensitive tools. The need for refined imaging methods for fundamental research and biomedical applications related to the study of disease remains acute. Nongjian (N.J.) Tao and his colleagues at the Biodesign Institute at Arizona State University have pioneered a new technique capable of peering into single cells and even intracellular...

2010-08-24 16:55:26

In the war against infectious disease, identifying the culprit is half the battle. Now, research professor Shaopeng Wang and his colleagues from the Biodesign Institute at Arizona State University, describe a new method for visualizing individual virus particles. Their research opens the door to a more detailed understanding of these minute pathogens, and may further the study of a broad range of micro- and nanoscale phenomena. The group's findings appear in the August 23rd Proceedings of the...

2010-08-04 16:37:22

Surface plasmons are quanta of collective oscillations of free electrons at metal-insulator interface, usually excited by photons. Since it was first proposed in 1950s by Ritchie, new interests have been aroused due to recent advances in synthesis and fabrica-tion of various nanostructures. Novel optical properties were frequently reported on these materials, with great potential applica-tions in physics, chemistry, biology and cancer therapy, etc. Some of them have even exhibited enormous...

2010-06-29 02:00:00

BEIJING, June 29 /PRNewswire-Asia-FirstCall/ -- China Medical Technologies, Inc. (the "Company") (Nasdaq: CMED), a leading China-based advanced in-vitro diagnostic ("IVD") company, today announced the recent publication of a large sample study on the Company's SPR analyzer and related HPV DNA chip (the "SPR System") for the detection of 16 high risk and 8 low risk genotypes of human papillomavirus ("HPV"). The study tested specimens of 560 patients with atypical squamous cells of...

2010-06-24 04:28:54

New technique can sense movement of single molecules over hours Scientists can detect the movements of single molecules by using fluorescent tags or by pulling them in delicate force measurements, but only for a few minutes. A new technique by Rice University researchers will allow them to track single molecules without modifying them -- and it works over longer timescales. In the current issue of Nanotechnology, a team led by Jason Hafner, an associate professor of physics and astronomy and...


Word of the Day
call-note
  • The call or cry of a bird or other animal to its mate or its young.
'Call-note' is newer than 'bird-call,' which originally referred to 'an instrument for imitating the note of birds' but now also refers to 'the song or cry of a bird.'
Related