Latest Optical tweezers Stories
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 +-...
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...
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...
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...
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...
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...
Scientists can now confirm the theory of classical Brownian motion using details that Einstein missed when he first proposed it a century ago100 years after Einstein's landmark paper, optical tweezer technology could confirm the theory of classical Brownian motion in details that Einstein missed when he first proposed it a century ago. This research is reported today in a special Einstein Year issue of the New Journal of Physics published jointly by the Institute of Physics and the German...
