Phase/Interfacial-Engineered Two-Dimensional-Layered WSe Films by a Plasma-Assisted Selenization Process: Modulation of Oxygen Vacancies in Resistive Random-Access Memory.

Here, we propose phase and interfacial engineering by inserting a functional WO layer and selenized it to achieve a 2D-layered WSe/WO heterolayer structure by a plasma-assisted selenization process. The 2D-layered WSe/WO heterolayer was coupled with an AlO film as a resistive switching (RS) layer to form a hybrid structure, with which Pt and W films were used as the top and bottom electrodes, respectively. The device with good uniformity in SET/RESET voltage and high low-/high-resistance window can be obtained by controlling a conversion ratio from a WO film to a 2D-layered WSe thin film.

Using Smartphones for Indoor Fire Evacuation.

Fire smoke reduces the visibility of emergency direction signs, rendering them ineffective for providing appropriate guidance along evacuation routes in a fire situation. This is problematic because civilians may select evacuation routes that expose them to smoke or fire in a burning building. This study proposed using a smartphone voice-guided evacuation system (SVGES) to provide alternative evacuation routes for civilians trapped at a fire scene.