Abstract: A process for the preparation of reduced graphene comprising the steps of: providing an expandable graphite intercalated with oxygen containing groups; heating the expandable graphite under conditions sufficient to cause expansion of the expandable graphite and formation of an expanded graphite comprising oxygen containing groups; and contacting the expanded graphite with carbon monoxide to reduce at least a portion of the oxygen containing groups and form a reduced expanded graphite comprising an array of reduced graphene. The process of the invention enables large volumes of high quality graphene to be produced.

Abstract: A process for the preparation of reduced graphene comprising the steps of: providing an expandable graphite intercalated with oxygen containing groups; heating the expandable graphite under conditions sufficient to cause expansion of the expandable graphite and formation of an expanded graphite comprising oxygen containing groups; and contacting the expanded graphite with carbon monoxide to reduce at least a portion of the oxygen containing groups and form a reduced expanded graphite comprising an array of reduced graphene. The process of the invention enables large volumes of high quality graphene to be produced.

Abstract: The invention relates to a device for influencing a laser beam by means of an adaptive mirror (12) in the beam path, having a piezoelectric adjusting member (17) arranged on the back of the mirror (12), it being the case that, in order to achieve low-aberration deformation of the mirror (12) for the purpose of influencing the divergence of the beam, there is provided between the adjusting member (17) and the back (24) of the mirror (12) a pressure-transmitting device (19) which acts on a large area of the deformable surface of the mirror (12).

Abstract: Disclosure is directed to an apparatus for producing a microwave discharge n a supersonic gas flow such that the available microwave energy is deposited in the gas as completely and uniformly as possible through a substantial cross-section of the flow channel. The flow channel is provided within a waveguide and microwave energy is caused to be propagated through the waveguide substantially in the direction of the gas flow. A supersonic nozzle is provided in the channel dividing the channel into an upstream plenum and a downstream low pressure region, and the electric discharge occurs in the low pressure region just beyond the nozzle throat.