Researchers create ‘extremely small’ sensor using ‘white graphene’

Researchers from TU Delft in the Netherlands, in collaboration with a team at the University of Cambridge, have found a way to create and clean tiny mechanical sensors in a scalable manner.

They created these sensors by suspending a two-dimensional sheet of hexagonal boron nitride (h-BN), or “white graphene” over small holes in a silicon substrate. This innovation could lead to extremely small gas and pressure sensors for future electronics.

Hexagonal boron nitride (h-BN) is an interesting material, since it has a honeycomb lattice structure similar to that of graphite. But while graphite conducts electricity, h-BN acts as an insulator.  Continue reading Researchers create ‘extremely small’ sensor using ‘white graphene’

Nano-chimneys can cool circuits, say Rice University scientists

From the Rice University website

The Rice lab of theoretical physicist Boris Yakobson found that putting a cone-like “chimney” between the graphene and nanotube all but eliminates a barrier that blocks heat from escaping.

The research appears in the American Chemical Society’s Journal of Physical Chemistry C.

Heat is transferred through phonons, quasiparticle waves that also transmit sound. The Rice theory offers a strategy to channel damaging heat away from next-generation nano-electronics.  Continue reading Nano-chimneys can cool circuits, say Rice University scientists