More and more, nanopores are being used as stochastic sensors for biological molecules. Solid-state nanopores are good candidates for such a device and are often fabricated in an insulating membrane. However, membrane nanopores can be easily broken or stripped off from the substrate due to surface tension or salt solution corrosion. Now, researchers in China have shown that glass capillaries can be used to form nanopores for sensing and DNA sequencing applications, as well as controlled delivery and ion conductance microscopy.
http://nanotechweb.org/cws/article/lab/45727