CNCS Seminar
Tuesday, March 1, 2016, 3:00pm, 119 Physics
Itai Cohen (Dept of Physics, Cornell)
Q: How many folded angels can dance on the head of pin? A: 22+/-5
Abstract:- For centuries, origami, the Japanese art of paper folding, has been a
powerful technique for transforming two dimensional sheets into beautiful
three dimensional sculptures. Recently, origami has made its foray into a
new realm, that of physics and engineering, where it has been
revolutionizing our concept of materials design. In this talk I will
describe the new design principles we are uncovering for determining the
shape, mechanics, and transformations of origami structures along with their usefulness in areas as diverse as solar sail design, architecture, and even fashion.
Arguably however, the greatest strength of this new paradigm is the fact
that origami is intrinsically scalable. Thus sculptures built at one size
can be shrunk down smaller and smaller. This begs the question: what is the smallest fold one can make? Or in other words, how many folded angels can dance on the head of a pin? The rest of this talk will take a deep dive into how origami has been marching smaller and smaller in size. From folding by hand, to self-folding through shape memory alloys and even
folding via polymer layers, I will argue that the ultimate limit for scaling down origami is set by folding a sheet of atomic dimensions. I will conclude by showing this vision: realized in
the folds of a single sheet of graphene. [video]
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