A nano-lollipop? This is a tiny glass ball on a tiny stick made of polymer, a
partially-completed nano-sized chemical sensor made by then-grad-student Matthew
Chen. It’s on its way to becoming a nano-torch
[http://lewisandquark.tumblr.com/post/92218390187/this-is-a-nanotorch-which-is-an-ultra-sensitive]
, which can detect minute concentrations of chemicals due to
