Above, we replicate the capillary origami experiments. The PDMS triangle is

about 1cm on a side. The droplet is distilled water with green dye. Photos are

taken 20 minutes apart. The fabric is a hydrophobic surface obtained from

Gore (courtesy of Rich Braun).

In this one, a drop of ferrofluid is placed on a piece of PDMS. The PDMS

is then forced to fold using tweezers. (The surface tension of ferrofluid

is too low to fold otherwise ~ 20 times less than that of water.) A magnet

is then brought close to the sample from below and then removed. Here

photos are 1 second apart.

In this still photo, we see that a soap bubble can easily bend PDMS. Here we

have a rectangular piece of PDMS wrapped around a double-bubble. A neat

CMC-surface problem!