Fluorescence movie of human knee cartilage under shear. The cartilage is stained green, then photobleached, to allow for calculation of strains and displacements, and in turn for calculations of local moduli. Notice that the upper region, close to the articular surface, is much more compliant than the bulk.
Bilayer colloidal crystal composed of ~1 micron silica colloids with a sticky "depletion" interaction. The colloidal particles that are not part of the crystal can be seen diffusing around.
Time lapse video of the front view of a Medicago root growing on an inclined plane within a gel. One photo is taken an hour over a course of 2 weeks. Note the root waving as it hits the glass plane.
Colloidal silica dimers undergoing rotational and translational Brownian motion.
Milk under a light microscope. You can clearly see Brownian motion of colloidal milk particles. The particles are weakly interacting, sticking and un-sticking occasionally.
The shear cell used for most of the colloid experiments.
We are helping to provide workshops for Middle School Science Teachers designed to support the teaching of physical science at the middle school level. These workshops are directed by the Cornell Center for Materials Research.
At these workshops we bring together talks from researchers in the New York area as well as an additional keynote speaker. The rest of the time will be taken up by short (2 min.) presentations. These presentations give the audience a flavor for the research topic and techniques used to address the research problem discussed. The overall goal is to give the audience an overview of the type of research techniques being used and problems being studied in the New York area.