WS/MHS PdTe/Si Mixed-Dimensional Heterojunction as Ultra-Broadband Photodetector for Health and Safety Monitoring.

Ultra-broadband photodetectors (UB-PDs) are essential in medical applications, public safety monitoring, and various other fields. However, developing UB-PDs covering multiple bands from ultraviolet to medium infrared remains a challenge due to material limitations. Here, a mixed-dimensional heterojunction composed of 2D WS/monodisperse hexagonal stacking (MHS) 3D PdTe particles on 3D Si is proposed, capable of detecting light from 365 to 9600 nm.

Self-Powered and Broadband Photodetectors Based on High-performance Mixed Dimensional SbO/PdTe/Si Heterojunction for Multiplex Environmental Monitoring.

Solar-blind ultraviolet (SBUV) to near-infrared (NIR) broadband photodetectors (BB-PD) have important applications in environmental monitoring and other applications. However, it is challenging to prepare SBUV-IR photosensitive materials via simple steps and to construct SBUV-IR broadband devices for multiplex detection with high sensitivity at different wavelengths. Here, self-powered and broadband photodetectors using a high-performance mixed dimensional SbO nanorod 1-dimension (1D)/monodisperse microdiamond-like PdTe 3-dimension (3D)/Si (3D) heterojunction for multiplex detection of environmental pollutants with high sensitivity at broadband wavelength are developed.

Self-Powered and Broadband Bismuth Oxyselenide/p-Silicon Heterojunction Photodetectors with Low Dark Current and Fast Response.

Inorganic nanomaterials such as graphene, black phosphorus, and transition metal dichalcogenides have attracted great interest in developing optoelectronic devices due to their efficient conversion between light and electric signals. However, the zero band gap nature, the unstable chemical properties, and the low electron mobility constrained their wide applications. Bismuth oxyselenide (BiOSe) is gradually showing great research significance in the optoelectronic field.

Flexible SnSe Photodetectors with Ultrabroad Spectral Response up to 10.6 μm Enabled by Photobolometric Effect.

A broad spectral response is highly desirable for radiation detection in modern optoelectronics; however, it still remains a great challenge. Herein, we report a novel ultrabroadband photodetector based on a high-quality tin monoselenide (SnSe) thin film, which is even capable of detecting photons with energies far below its optical band gap. The wafer-size SnSe ultrathin films are epitaxially grown on sodium chloride via the 45° in-plane rotation by employing a sputtering method.

TiO@TiOHx core-shell nanoparticle film/Si heterojunction for ultrahigh detectivity and sensitivity broadband photodetector.

A simple hydrogenation treatment is used to synthesize unique oxygen-deficient TiO with a core/shell structure (TiO@TiOH), superior to the high H-pressure process (under 20 bar for five days). It is demonstrated that oxygen-deficient TiO nanoparticle film/Si heterojunction possesses improved photoresponse performance compared to the untreated TiO nanoparticle film/Si heterojunction. Particularly, under 900 nm of 0.

Superior Selective CO Adsorption of CN Pores: GCMC and DFT Simulations.

Development of high-performance sorbents is extremely significant for CO capture due to its increasing atmospheric concentration and impact on environmental degradation. In this work, we develop a new model of CN pores based on GCMC calculations to describe its CO adsorption capacity and selectivity. Remarkably, it exhibits an outstanding CO adsorption capacity and selectivity.

Enhanced Room Temperature Oxygen Sensing Properties of LaOCl-SnO Hollow Spheres by UV Light Illumination.

In this paper, a facile and elegant Green Chemistry method for the synthesis of SnO based hollow spheres has been investigated. The influences of doping, crystallite morphology, and operating condition on the O sensing performances of SnO based hollow-sphere sensors were comprehensively studied. It was indicated that, compared with undoped SnO, 10 at.

Ultrahigh broadband photoresponse of SnO nanoparticle thin film/SiO/p-Si heterojunction.

The SnO/Si heterojunction possesses a large band offset and it is easy to control the transportation of carriers in the SnO/Si heterojunction to realize high-response broadband detection. Therefore, we investigated the potential of the SnO nanoparticle thin film/SiO/p-Si heterojunction for photodetectors. It is demonstrated that this heterojunction shows a stable, repeatable and broadband photoresponse from 365 nm to 980 nm.

Defective germanene as a high-efficiency helium separation membrane: a first-principles study.

Development of low energy cost membranes for separating helium from natural gas is highly desired. Using van der Waals-corrected first-principles density functional theory (DFT) calculations, we theoretically investigate the helium separation performance of divacancy-defective germanene. The 555 777 divacancy-defective germanene presents a 0.

Effects of Sulfur Doping and Humidity on CO Capture by Graphite Split Pore: A Theoretical Study.

By use of grand canonical Monte Carlo calculations, we study the effects of sulfur doping and humidity on the performance of graphite split pore as an adsorbent for CO capture. It is demonstrated that S doping can greatly enhance pure CO uptake by graphite split pore. For example, S-graphite split pore with 33.

Tunable hydrogen separation in porous graphene membrane: first-principle and molecular dynamic simulation.

First-principle density functional theory (DFT) calculation and molecular dynamic (MD) simulation are employed to investigate the hydrogen purification performance of two-dimensional porous graphene material (PG-ESX). First, the pore size of PG-ES1 (3.2775 Å) is expected to show high selectivity of H2 by DFT calculation.

Self-assembly of double helical nanostructures inside carbon nanotubes.

We use molecular dynamics (MD) simulations to show that a DNA-like double helix of two poly(acetylene) (PA) chains can form inside single-walled carbon nanotubes (SWNTs). The computational results indicate that SWNTs can activate and guide the self-assembly of polymer chains, allowing them to adopt a helical configuration in a SWNT through the combined action of the van der Waals potential well and the π-π stacking interaction between the polymer and the inner surface of SWNTs. Meanwhile both the SWNT size and polymer chain stiffness determine the outcome of the nanostructure.

Influence of chemical functionalization on the CO₂/N₂ separation performance of porous graphene membranes.

The separation of CO₂ from a mixture of CO₂ and N₂ using a porous graphene membrane was investigated using molecular dynamics (MD) simulations. The effects of chemical functionalization of the graphene sheet and pore rim on the gas separation performance of porous graphene membranes were examined. It was found that chemical functionalization of the graphene sheet can increase the absorption ability of CO₂, while chemical functionalization of the pore rim can significantly improve the selectivity of CO₂ over N₂.

Effect of functional groups on the radial collapse and elasticity of carbon nanotubes under hydrostatic pressure.

The effect of functional groups on the radial collapse and elasticity of a single-walled carbon nanotube (SWNT) under hydrostatic pressure was investigated using molecular dynamics and molecular mechanics simulations. It is found that the radial collapse and elasticity of the chemically modified SWNTs strongly depend on the polarity of the functional groups and the degree of functionalization. The results show that the fluorine modified SWNT (F-SWNT), on which 2.