Atomic-Level Insights of Polypyrrole Grafted InGaZnO Structure for ppb-Level Ozone Gas Sensing at Low Operating Temperature.

This study explores the utilization of the organic conductive molecule Polypyrrole (PPy) for the modification of Indium Gallium Zinc Oxide (IGZO) nanoparticles, aiming to develop highly sensitive ozone sensors. Pyrrole (Py) molecules undergo polymerization, resulting in the formation of extended chains of PPy that graft onto the surface of IGZO nanoparticles. This interaction effectively diminishes oxygen vacancies on the IGZO surface, thereby promoting the crystallization of the IGZO (1114) facets.

Exploring the weak visible-near-infrared and NOdetection capabilities of PbS/SbOheterostructures with DFT interpretations.

The need for photosensors and gas sensors arises from their pivotal roles in various technological applications, ensuring enhanced efficiency, safety, and functionality in diverse fields. In this paper, interlinked PbS/SbOthin film has been synthesized by a magnetron sputtering method. We control the temperature to form the nanocomposite by using their different nucleation temperature during the sulfonation process.

A simple and fast method for the fabrication of p-type-GaOby electrochemical oxidation method with DFT interpretation.

In this work, a simple electrochemical oxidation method has been used to prepare p-type-GaOnanoparticles. This method overcomes the problem of doping high energy gap semiconductors to form p-type. The electron holes of-GaOwere caused by oxygen vacancy (Vo) and showed the shorter lattice constant and preferred orientation in XRD analysis.

Highly sensitive and rapid responding humidity sensors based on silver catalyzed AgS-TiO quantum dots prepared by SILAR.

We developed a resistive humidity sensor based on a heterojunction of silver sulfide (AgS) quantum dots (QDs) and TiO because of its specificity to water vapor adsorption and its insensitivity to environmental gases. The QDs were grown on a mesoporous TiO layer using the successive ionic layer adsorption and reaction (SILAR) method. The boundary condition between TiO and AgS provides a tunable energy gap by adjusting the number of SILAR cycles.

Comparative DFT dual gas adsorption model of ZnO and Ag/ZnO with experimental applications as gas detection at ppb level.

By experimental and density functional theory calculations, the toxic gases (Oand NO) sensing capability and mechanism of ZnO NRs and Ag/ZnO NRs have been comparatively studied in this work. Ag NPs arrays were employed for the growth of ZnO NRs. The experimental results show that when ZnO NRs are grown on Ag NPs, the response and adsorption rate towards the gases change significantly.

Improving the SERS signals of biomolecules using a stacked biochip containing FeO/Au nanoparticles and a DC magnetic field.

This study proposes a magnetic biochip that uses surface-enhanced Raman scattering (SERS) for antigen detection. The biochip was a sandwich structure containing alternating layers of gold and magnetic FeO nanoparticles. Both single (Au/FeO/Au) and multilayer (Au/FeO/Au/FeO/Au) chips containing FeO nanoparticles were fabricated to detect bovine serum albumin (BSA).

Analysis of the Sensing Properties of a Highly Stable and Reproducible Ozone Gas Sensor Based on Amorphous In-Ga-Zn-O Thin Film.

In this study, the sensing properties of an amorphous indium gallium zinc oxide (a-IGZO) thin film at ozone concentrations from 500 to 5 ppm were investigated. The a-IGZO thin film showed very good reproducibility and stability over three test cycles. The ozone concentration of 60-70 ppb also showed a good response.

Influence of magnetoplasmonic γ-FeO/Au core/shell nanoparticles on low-field nuclear magnetic resonance.

Magnetoplasmonic nanoparticles, composed of a plasmonic layer and a magnetic core, have been widely shown as promising contrast agents for magnetic resonance imaging (MRI) applications. However, their application in low-field nuclear magnetic resonance (LFNMR) research remains scarce. Here we synthesised γ-FeO/Au core/shell (γ-FeO@Au) nanoparticles and subsequently used them in a homemade, high-T, superconducting quantum interference device (SQUID) LFNMR system.