The development of crystalline lamellae in ultra-thin layers of poly(ethylene terephthalate) PET confined between polycarbonate (PC) layers in an alternating assembly is investigated as a function of layer thickness by means of X-ray diffraction methods. Isothermal crystallization from the glassy state is insitu followed by means of small-angle X-ray diffraction. It is found that the reduced si...

A layered manganese oxide film grown electrochemically was applied to remove methylene blue (MB), a cationic dye, from an aqueous solution. A layered MnO(x) film intercalated with tetraethylammonium (Et(4)N) cations was deposited potentiostatically at +1.0 V (vs. Ag/AgCl) from an aqueous Mn(2+) solution containing Et(4)NCl. Et(4)N cations were sandwiched between negatively charged MnO(x) layers...

Strain-based band structure engineering is a powerful tool to tune the optical and electronic properties of semiconductor nanostructures. We show that we can InGaAs quantum wells modify helicity emitted light by integrating them into rolled-up heterostructures changing their geometrical configuration. Experimental results from photoluminescence excitation spectroscopy demonstrate strong energy ...

The strength and ductility of nanolayered materials are determined by a delicate balance between dislocation and interface motion under applied mechanical loading. We present here studies of dislocation and interface motion in single crystal and nanotwinned copper, utilizing molecular dynamics simulations. Motion of twin boundary interfaces themselves is dictated by the stress state at the inte...

Superlattice (SL) thin films composed of refractory ceramics unite extremely high hardness and enhanced fracture toughness; a material combination which is often mutually exclusive. While the enhancement well described by existing models based on dislocation mobility, underlying mechanisms behind increase in toughness are yet to be unraveled. Here, we provide model linear elasticity theory pred...