Researchers have developed a new lithography technique that uses nanoscale spheres to create three-dimensional (3-D) structures with biomedical, electronic and photonic applications. The new technique is significantly less expensive than conventional methods and does not rely on stacking two-dimensional patterns to create 3-D structures.
ZnO nanowire were used to expand the active layer in the Cu2O light-absorbing layer and in the highly resistive i-ZnO layer to reduce the recombination loss at the heterointerface of ZnO/Cu2O photovoltaic devices.
Researchers have fabricated back-gated field-effect phototransistors made of MoSe2 crystals having a thickness of only twenty nanometers. The devices were fabricated by mechanical cleavage of MoSe2 crystals into few-layered flakes, followed by transfer onto a silicon wafer with pre-deposited titanium electrodes.
Researchers are closer to understanding the process by which nanoparticles made of more than one material - called heterostructured nanoparticles - form. This process, known as heterogeneous nucleation, is the same mechanism by which beads of condensation form on a windowpane.
How can light which has been captured in a solar cell be examined in experiments? Scientists have succeeded in looking directly at light propagation within a solar cell by using a trick. The photovoltaics researchers are working on periodic nanostructures that efficiently capture a portion of sunlight which is normally only poorly absorbed.
A chemical reaction is a rearrangement of atoms in and between molecules, the breaking of old and the formation of new bonds. The glue that binds atoms in molecules and creates the bonds between them is made out of valence electrons. Scientists were able to show theoretically that the ultrafast x-ray camera is not only sensitive to inert core electrons but may also visualize the motion of chemically active valence electrons.