Latest Optical tweezers Stories

2009-04-16 08:00:04

Physicists at Brown University have developed a novel procedure to map a person's genome. They report in the journal Nanotechnology the first experiment to move a DNA chain through a nanopore using magnets. The approach is promising because it allows multiple segments of a DNA strand to be read simultaneously and accurately. Since the human genome was sequenced six years ago, the cost of producing a high-quality genome sequence has dropped precipitously. More recently, the National Institutes...

2008-12-03 08:51:54

Researchers at Purdue University have developed a technique that uses a laser and holograms to precisely position numerous tiny particles within seconds, representing a potential new tool to analyze biological samples or create devices using nanoassembly. The technique, called rapid electrokinetic patterning, is a potential alternative to existing technologies because the patterns can be more quickly and easily changed, said mechanical engineering doctoral student Stuart J. Williams. "It's...

2008-11-28 09:19:25

Science fiction writers have long envisioned sailing a spacecraft by the optical force of the sun's light. But, the forces of sunlight are too weak to fill even the oversized sails that have been tried. Now a team led by researchers at the Yale School of Engineering & Applied Science has shown that the force of light indeed can be harnessed to drive machines "” when the process is scaled to nano-proportions. Their work opens the door to a new class of semiconductor devices that are...

2008-09-23 03:00:10

By Vayshenker, I Li, X; Livigni, D J; Lehman, J H; Bermudez, J C; Molina, J C; Ruiz, Z E We describe the results of a comparison of reference standards between the National Institute of Standards and Technology (NIST- USA) and Centro Nacional De Metrologia (CENAM-Mexico). Open beam (free field) and optical-fiber-based measurements at wavelengths of 1302 nm and 1546 nm are reported. Both laboratories' reference standards were compared by means of a temperature-controlled optical trap...

2008-07-29 03:00:56

By Todd, Brian A Parsegian, V Adrian; Shirahata, Akira; Thomas, T J; Rau, Donald C ABSTRACT By combining single-molecule magnetic tweezers and osmotic stress on DNA assemblies, we separate attractive and repulsive components of the total intermolecular interaction between multivalent cation condensed DNA. Based on measurements of several different cations, we identify two invariant properties of multivalent cation-mediated DNA interactions: repulsive forces decay exponentially with a 2.3 +-...

2008-02-25 13:26:44

Microfabricated optical tweezer has the potential to make biological and microfluidic force measurements in integrated systems such as microfluidic chipsResearchers at the Harvard School of Engineering and Applied Sciences (SEAS) demonstrated a new type of optical tweezer with the potential to make biological and microfluidic force measurements in integrated systems such as microfluidic chips. The tweezer, consisting of a Fresnel Zone Plate microfabricated on a glass slide, has the ability to...

2005-08-01 18:38:41

In an effort to combine sophisticated laser and Internet technologies, scientists in Australia have successfully performed laser surgery and "optical trapping" in a Southern California laboratory via the Internet. The scientists used a new Internet-based laser scissor-and-tweezers technology called RoboLase, demonstrating the potential of using the technology for real-time research activities between laboratories and for physicians to perform medical procedures from distant locations. In a...

2005-07-21 16:16:40

Berkeley -- Rounding up wayward cells and particles on a microscope slide can be as difficult as corralling wild horses on the range, particularly if there's a need to separate a single individual from the group. But now, a new device developed by University of California, Berkeley, engineers, and dubbed an "optoelectronic tweezer," will enable researchers to easily manipulate large numbers of single cells and particles using optical images projected onto a glass slide coated with...

2005-07-20 12:00:00

LONDON -- Scientists seeking a simple solution to the tricky task of separating single cells from a herd of others have found a way of making light of the problem. The new technique dubbed the "optoelectronic tweezer" combines a relatively low intensity light source with photo electricity to allow scientists to literally corral the cells they want to study, and could have major medical implications. "Our design has a strong practical advantage in that, unlike optical tweezers, a simple light...

2005-07-11 22:55:00

New York University physicists have applied a ground-breaking nanotechnology method to create three-dimensional quasicrystals, highly ordered structures that, unlike conventional crystals, never repeat themselves. Metallic quasicrystals created from exotic alloys have shown promise for storing hydrogen more efficiently than crystalline hosts. Their non-repeating structure has the potential to dramatically strengthen industrial and commercial products. The NYU quasicrystals, by contrast, are...

Word of the Day
  • Remarkable; prodigious.
  • Audacious; gutsy.
  • Completely; extremely.
  • Audaciously; boldly.
  • Impressively great in size; enormous; extraordinary.
This word is probably from the dialectal 'boldacious,' a blend of 'bold' and 'audacious.'