Not exact matches
These measurements revealed that the
thinnest structures undergo more significant size changes than thicker
sheets: A single layer
of graphene, which contracts when heated, shrinks more than materials composed
of a few
graphene layers.
A single
sheet of graphene resembles atomically
thin chicken wire and is composed
of carbon atoms joined in a pattern that makes the material extremely tough and impervious to even the smallest atom, helium.
To get a closer look at the individual nickel atoms within the atomically
thin graphene sheet, the scientists used scanning transmission electron microscopy (STEM) at Brookhaven's Center for Functional Nanomaterials (CFN), a DOE Office
of Science User Facility.
«
Graphene is a
thin sheet of a naturally occurring mineral, graphite, so we would be sending it back to the ground from which it came along with the wood platform instead
of to a landfill full
of electronics parts.»
Placing a
sheet of atomically -
thin graphene into a feedback circuit causes spontaneous self - oscillation that can be tuned to create frequency modulated (FM) signals.
He works with
graphene, a stronger - than - steel infinitesimally
thin lattice
of tightly packed carbon atoms, and carbon nanotubes —
sheets of graphene rolled into hollow tubes with walls that are just one atom thick.
One
of the
thinnest and strongest materials known to man,
graphene is a 2D
sheet of carbon just one atom thick.
An interdisciplinary team
of engineers from the University
of Pennsylvania has made a discovery regarding the surface properties
of graphene, the Nobel - prize winning material that consists
of an atomically
thin sheet of carbon atoms.
However, in all
of these instances,
graphene in its original form
of atom -
thin, flat
sheets has had to be used with peripheral supports and structures because it lacks a solid shape and form
of its own.
For faster, longer - lasting water filters, some scientists are looking to
graphene —
thin, strong
sheets of carbon — to serve as ultrathin membranes, filtering out contaminants to quickly purify high volumes
of water.
To truly understand the significance
of the team's findings, it's instrumental to understand the nature
of two - dimensional (2 - D) materials, and for that one must go back to 2010 when the world
of 2 - D materials was dominated by a simple
thin sheet of carbon, a layered form
of carbon atoms constructed to resemble honeycomb, called
graphene.
The
graphene work that netted the Nobel Prize for Andre K. Geim and Konstantin S. (Kostya) Novoselov involved isolating one - atom -
thin sheets of carbon from graphite.
Using scanning transmission electron microscopy (STEM) to monitor the behaviour
of the nickel -
graphene combination, the scientists discovered the atom -
thin carbon
sheet was ensuring the efficiency
of the catalytic conversion by preventing the nickel moving around.
«We've developed the first membrane that consists
of a high density
of subnanometer - scale pores in an atomically
thin, single
sheet of graphene,» O'Hern says.
Cornelia Parker is among those who have begun to explore the possibilities
of graphene, the
sheet of flexible carbon that is transparent, stronger than steel and so
thin it is effectively two - dimensional.
Researchers at Lawrence Berkeley National Laboratory (Berkeley Lab) have developed a new, environmentally stable solid - state hydrogen storage material constructed
of Mg nanocrystals encapsulated by atomically
thin and gas - selective reduced
graphene oxide (rGO)
sheets.