Search

In this study, uncooled antenna-coupled microbolometer arrays were fabricated to detect terahertz waves by using nanoscale meander-shaped Ti thermistors with design widths of DW = 0.1 and 0.2 μm, respectively, on SiO2 and SiNx substrates. Each unit device with a thermistor with DW = 0.1 μm yielded double the electrical responsivity (787 V/W) of unit devices with thermistors with DW = 0.2 μm (386 V/W) at the maximum allowable bias current (Ib = 50 for DW = 0.1 μm and 100 μA for DW = 0.2 μm, respectively). However, the calculated noise-equivalent power (NEP) of unit devices with thermistors with DW = 0.1 μm was 1.85 × 10 − 10 W / Hz at Ib = 50 μA and 1.58 × 10 − 10 W / Hz at Ib = 100 μA for unit devices with thermistors with DW = 0.2 μm. Hence, the reduction in DW did not lead to an improvement in NEP. This study validates our previous investigation into the effect of width on such device parameters such as the temperature coefficient of resistance (TCR) and resistivity in the context of device miniaturization. The smaller grain size in thinner metal interconnects (thermistors) can be linked to the lower TCR and increased resistivity of the devices. Thus, the enhancement in responsivity in the design was largely due to the nanoscale meander design that, however, was detrimental to the noise response of the devices. These devices with nanoscale Ti meander thermistors deliver high responsivity in unit devices with scope for further miniaturization and have significant potential for application as on-chip integrable detector arrays. [ABSTRACT FROM AUTHOR]

Although the silicon-on-insulator (SOI) is not popular as a material for photodetectors due to the small light absorption in the thin silicon layer, it brings new opportunities in photodetectors based on the phenomena such as optical confinement, carrier confinement and thermal isolation. This report introduces the unique uses of such phenomena found in the SOI photodiode with surface plasmon (SP) antenna, SOI MOSFET single-photon detector and SOI MOSFET terahertz (THz) bolometer.This study aims to study the roles of digital media in affecting women with hijab. Women who wear hijab somehow spread through publications and media participation in the dissemination of Hijab types. The aim and their understanding of Hijab's mode have been challenged in studying the roles of media in influencing women. A comprehensive study of 60 women was carried out to assess if media in modernization Hijab affects women in the use of Hijab. Results have been presented, and it has been shown that the media is using its resources entirely to manipulate women who wear Hijab regardless of their true intent. Hijab apparel sales media to continue in the fashion line. The Islamic laws continue to be styled by Muslim women. Technology helps spread news or updates of the current Hijab mode to everyday Muslim people in today's modern world. Changes to the Hijab mode may be accepted as one of the fashion trends during this period. However, to not deceive Islam's missionary, the relevance or the real prospects should be strengthened by Hijab. [ABSTRACT FROM AUTHOR]

Doping plays a significant role in affecting the physical and chemical properties of two-dimensional (2D) dichalcogenide materials. Controllable doping is one of the major factors in the modification of the electronic and mechanical properties of 2D materials. MoS 2 2D materials have gained significant attention in gas sensing owing to their high surface-to-volume ratio. However, low response and recovery time hinder their application in practical gas sensors. Herein, we report the enhanced gas response and recovery of Nb-doped MoS 2 gas sensor synthesized through physical vapor deposition (PVD) toward NO 2 at different temperatures. The electronic states of MoS 2 and Nb-doped MOS 2 monolayers grown by PVD were analyzed based on their work functions. Doping with Nb increases the work function of MoS 2 and its electronic properties. The Nb-doped MoS 2 showed an ultrafast response and recovery time of t rec = 30/85 s toward 5 ppm of NO 2 at their optimal operating temperature (100 °C). The experimental results complement the electron difference density functional theory calculation, showing both physisorption and chemisorption of NO 2 gas molecules on niobium substitution doping in MoS 2 ., Competing Interests: The authors declare no competing financial interest., (© 2022 The Authors. Published by American Chemical Society.)