Arjun Yodh and student Peter Yunker of the School of Arts and Sciences discuss the “coffee ring effect.”
School of Arts & Sciences
PHILADELPHIA — It is helpful — even life-saving — to have a warning sign before a structural system fails, but, when the system is only a few nanometers in size, having a sign that’s easy to read is a challenge. Now, thanks to a clever bit of molecular design by University of Pennsylvania and Duke University bioengineers and chemists, such warning can come in the form of a simple color change.
PHILADELPHIA — A team of University of Pennsylvania physicists has shown how to disrupt the “coffee ring effect” — the ring-shaped stain of particles left over after coffee drops evaporate — by changing the particles' shape. The discovery provides new tools for engineers to deposit uniform coatings.
Al Filreis of the School of Arts and Sciences is spotlighted for his approach to poetry.
Note for TV and radio: The University of Pennsylvania has a satellite
uplink facility with live-shot capability near campus and an on-campus ISDN line.
Dr. John MacDonald
Department Chair, Associate Professor of Criminology
University of Pennsylvania