We demonstrate a novel method to fabricate an axial p-n junction inside <111> oriented short vertical silicon nanowires grown by molecular beam epitaxy by combining ion implantation with in-situ doping. The lower halves of the nanowires were doped in-situ with boron (concentration ~1018cm-3), while the upper halves were doubly implanted with phosphorus to yield a uniform concentration of 2 × 10...

Hydrodynamic techniques such as analytical ultracentrifugation can provide key information about subunit stoichiometry and interaction strengths of protein-nucleic acid interactions. Analysis is complicated by (i) the need for low concentrations in order to observe both free and bound species and (ii) thermodynamic non-ideality. With the introduction of fluorescence optics, we are able to obtai...

The activities of manganese in Mn-C and Mn-Si melts at 1673K have been determined. The transportation method was applied to the vapor pressure measurement. The activities of manganese in the Mn-C melts as referred to pure liquid manganese showed the positive deviation from ideality at less than 0.17 atomic fraction of carbon and deviated negatively above this value. The activities of manganese ...

Halide perovskite solar cells exhibit a unique combination of properties, including ion migration, low non-radiative recombination and performance dependence on temperature. Because these idiosyncrasies, it is debatable whether standard procedures for assessing photovoltaic technologies are sufficient to appropriately evaluate this technology. Here, we show the open-circuit voltage temperature ...

Graphene-semiconductor interface is important for the applications in electronic and optoelectronic devices. Here we report the modulation of the electric transport properties of graphene/ZnO nanowire Schottky diode by gate voltage (Vg). The ideality factor of the graphene/ZnO nanowire Schottky diode is ~1.7, and the Schottky barrier height is ~0.28 eV without external Vg. The Schottky barrier ...

Rectifying diodes of single nanobelt/nanowire-based devices have been fabricated by aligning single ZnO nanobelts/nanowires across paired Au electrodes using dielectrophoresis. A current of 0.5 microA at 1.5 V forward bias has been received, and the diode can bear an applied voltage of up to 10 V. The ideality factor of the diode is approximately 3, and the on-to-off current ratio is as high as...

the solubility of k2so4 in water at 25°c was determined. comparing the value ofthermodynamic solubility product constant, ksp(th), (ksp(th) = exp (-δgodiss rt) of the mentionedsalt to the value of concentration solubility product, ksp(c) which is obtained from the observedsolubility, s/mol-1, ksp(c) = 4s3, revealed a great difference. the difference can be satisfactorilyexplained using debye- h...