Images © Dee Breger Back to November 2002 press release Back to NSF/Science award press release

INDUSTRIAL FILTER: This image provides an enlarged corner view of a foamlike film of nylon, a type of membrane filter developed for industrial uses, fabricated by Columbia chemical engineering professor Carl Gryte. The left side shows an enlarged detail of the paper-thin cross-section, while the bottom of the filter is seen falling away to the right. Its nearly round pores appear elongated because of the oblique nature of the view. Magnification ~ 2000 X