Zinc oxide nanosheet is assessed as a selective adsorbent for the detection and adsorption of cadmium using simple eco-friendly extraction method. Pure zinc oxide nanosheet powders were characterized using field emission scanning electron microscopy, energy dispersive spectroscopy, X-ray diffraction, X-ray photoelectron spectroscopy, and Fourier transform infrared spectroscopy. The zinc oxide n...

This letter introduces a localized microwave technique for direct excitation of solid materials for the sake of their identification by atomic emission spectroscopy. The microwave energy is concentrated on the material surface by a microwave-drill type applicator. The evolved 1-mm hotspot is slightly evaporated and excited as plasma. An optical spectrometer measures the atomic emission spectrum...

This study uses the optical emission spectroscopy (OES) technique to find lead(Pb) and sulfur (S) plasma parameters employing a pulse of Nd: YAG laser (Q-switched 1064nm wavelength) different energies (400,500,600 700 mJ). The electron temperature Te (eV) is calculated using Boltzmann-Plot method, density ne (cm-3)is determined by Stark broadened way. Moreover, Debye length ?D (cm) frequency ?p...

Wave plasma sources (WPSs) were first proposed in the 1970s for electric propulsion (EP), and these research development processes culminated flight test 2021 of WPS-based thruster REGULUS. Recently, new approaches to WPS use have emerged—multiple schemes EPs that can generate propelling forces multiple directions within a single head, regarded as breakthrough technology in-space systems (PSs)....

Li-Yb co-doped nano-crystalline ZnO has been synthesized by a method of thermal growth from the salt mixtures. X-ray diffraction, transmission electron microscopy, atomic absorption spectroscopy and optical spectroscopy confirm the doping and indicate that the dopants may form Li-Li and Yb(3+)-Li based nanoclusters. When pumped into the conduction and exciton absorption bands of ZnO between 250...

A three-terminal spectroscopy that probes both subsurface energy barriers and interband optical transitions in a semiconductor heterostructure is demonstrated. A metal-base transistor with a unipolar p-type semiconductor collector embedding InAs/GaAs quantum dots QDs is studied. Using minorityor majority-carrier injection, ballistic electron emission spectroscopy and its related hot-carrier sca...