Engineers demonstrate a new type of optical tweezer
Researchers at the Harvard School of Engineering and Applied Sciences 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 trap particles without the need for high performance objective lenses.
The Republican presidential candidate began his final drive for the White House Thursday with a boost from running mate Sarah Palin and her nomination acceptance speech Wednesday night.
