We synthesized centimeter-scale single- to few-layer graphene (FLG) films via
chemical vapor deposition (CVD) on Ni foils. We demonstrates that the
precipitation mechanism may not be the only important mechanism in the
formation of graphene by CVD in Ni system, and that controlling the cooling
rate in the CVD process may not be the appropriate way to control the thickness
of graphene films. In addition, we are the first to demonstrate the transfer of
centimeter-scale FLG from Ni foil to transparent flexible polyethylene
terephthalate substrates via an efficient roll-to-roll process. Comparing to
rigid substrates, synthesis of graphene on flexible Ni foil has necessity for
the use of a roll-to-roll transfer process.
We argue that this is a quantum phase transition, which can be experimentally realized and probed. Indeed, by means of a mapping to the Ising model in a transverse field, we estimate the quantum critical point in terms of the system parameters, and find a finite, measurable deviation from the critic...
We present theoretical and
Experimental data for several vibronic and thermodynamic properties of CuGa2, a
Canonical ternary semiconductor of the chalcopyrite family. Among these
Properties are the lattice parameters, the phonon dispersion relations and
Densities of states (projected on the Cu, Ga,...
Large scale production of graphene nanosheets was achieved by arc evaporation of a graphite rod in air. The graphene nanosheets are approximately 100-200 nm wide and the number of layers is mainly in the range of 2-10. Several tens of grams of product were obtained per day. The yield of graphene nan...
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