Electronic structure and optical properties of doped γ-CuI scintillator: a first-principles study.

A cuprous iodide (CuI) crystal is considered to be one of the inorganic scintillator materials with the fastest time response, which is expected to play an important role in the field of γ and X rays detection in the future. To improve the detection performance of the CuI scintillator, the effects of element doping on the electronic structure and optical properties of the γ-CuI were investigated by using the first principles calculation method. It was found that Li and Na doping increases the band gap of the γ-CuI scintillator, while Cs, F, Cl, and Br doping decreases the band gap.

Gas permeation and microstructure of reduced graphene oxide/polyethyleneimine multilayer films created recast and layer-by-layer deposition processes.

Nowadays, graphene/polymer composite films with multilayer structure have attracted significant attention for gas barrier application. In this study, a series of reduced graphene oxide/polyethyleneimine (RGO/PEI) composite films were created recast and layer-by-layer deposition processes. By using the recast process, the myriad PEI molecules in the precursor solution (the PEI : GO feeding ratio is 0.

Low temperature scintillation performance of a Br-doped CHNHPbCl single-crystalline perovskite.

Time response and light yield are two of the most important features of a scintillation detector, and are mostly determined by the luminescence properties of the scintillator. Here we have investigated the radioluminescence (RL) characteristics of a single-crystalline hybrid lead halide perovskite at both room temperature and low temperature. A dual-channel single photon correlation (DCSPC) system with a vacuum chamber is employed for the measurement.

Influence of surface coating on the microstructures and dielectric properties of BaTiO ceramic a cold sintering process.

We present herein a modified cold sintering process (CSP) for BaTiO ceramics using a surface coating at the particle surface which could enhance the relative density of BaTiO up to ∼93.5% at 220 °C and 500 MPa. The surface coating greatly enhances the ceramic density, mainly because it facilitates the dissolution-precipitation process during CSP.