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Different morphologies of graphene can provide a great potential for applications of graphenebased nano-devices and functional nano-materials. Using molecular dynamic simulations, we show that by altering the temperature, one can induce unfolding of short (length less than ~50 nm) scrolled or folded graphene to a planar state. The mechanism of these phenomena is that temperature modifies the stability of these unclosed structures. We show in particular that morphology transformation of graphene is not explained by the change of the potential energy of the system, but rather it can be explained by a free energy analysis based on thermal dynamics. [ABSTRACT FROM AUTHOR]

Presents a study that developed high quality Si/Si[sub1-x]Ge[subx] superlattices having layers as thin as 1.5 nm by an ultrahigh vacuum/chemical vapor deposition system. Evaluation of the crystalline quality of the superlattices; Analysis of the experimental rocking curves; Role of the growth technique on nanometer thick layer deposition.

Studies the anisotropic and giant magnetoresistance (GMR) in cobalt and copper epitaxial multilayers. Difference between GMR and anisotropic MR; Details on the experiment; Discussion on the results of the study.

Presents information on a study that demonstrated the unipolar silicon/SiGe heterojunction diode grown by ultrahigh vacuum chemical vapor deposition at 550 degrees centigrade. Research method; Result and discussion.