This paper reports the synthesis of a S, N co-doped carbon dot (C-dot)-functionalized WO3 (C(S, N)-WO3) nanostructure via hydrothermal method, which exhibits ultrasensitivity for NO2 at ppb level and H2S ppm along with remarkable selectivity. The morphology is optimized by varying pH (1.5–3.5) solution. Characterization results reveal that surface 3 superior producing uniform nanoneedle nanostructures high sensitivity toward H2S. To further enhance selectivity nanoneedles, effect mixing...

Rose-like ZnO microcube/MoO <sub xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">3</sub> micrograss-based composite was synthesized via hydrothermal process followed by solution-based synthesis approach. The crystal structure, chemical state, morphology, and elemental analysis of the obtained rose-like were examined X-ray diffraction, photoelectron spectroscopy, field emission scanning electron microscopy, energy dispersive spectrometer,...

In this report, we study factors that dominate the mode transformation of resistive switching (RS) in yttria based memristive devices. It is found amorphous films are more suitable for RS whereas highly crystalline counterproductive RS. The from unipolar to bipolar demonstrated our devices via moving a system single Schottky barrier diode (SBD) double SBD. conduction mechanism behind these mechanisms be predominantly interfacial. We also report forming-free Al/Y2O3/Al memristor fabricated by...

<title>Abstract</title> The graphene-supported electro-catalysts in proton exchange membrane (PEM) fuel cells were evaluated this study, and the results show that output of these is positively correlated with current density, reaching a maximum about 2.5 W/cm². Problems energy conversion may be lurking, though, because efficiency still very low. Additional investigation into catalysts' electrochemical dynamics reevaluation model's loss parameters are warranted light discrepancy between power...

The development of a new type hybrid material comprising naphthalene-based π-conjugated amine (NBA) and zinc oxide (ZnO) nanohybrid, grown in situ on polydimethylsiloxane (PDMS) flexible substrate, is explored. morphology the nanohybrids controlled by optimizing growth time hydrothermal reaction. CO2 sensor utilizing NBA–ZnO shows outstanding sensing performance with maximum response ∼9% to 500 ppm at room temperature comparatively fast response/recovery (∼3/6 min). has excellent mechanical...

The effect of the statistical distribution grain surface area on variations switching voltages (set/reset or both) has been discussed in this report. Dual ion beam sputtered yttria-based memristive devices show unipolar and bipolar resistive (RS) for amorphous thin-film polycrystalline devices, respectively. Field emission scanning electron microscope image analysis techniques reveal that standard deviation (SD) is directly correlated with SD oxide layers. It found thin film have a smaller...

An interdigitated electrode fabricated with a covalent organic polymer (<bold>COP</bold>) acts as an efficient H₂S gas sensor at room temperature.

Herein, we fabricated nanoscale 2D CeO

In this article, the effect of SiO <sub xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">2</sub> layer is demonstrated on dual ion beam sputtered yttria-based memristive devices for first time. It found that thickening extremely detrimental resistive switching (RS) parameters such as endurance and uniformity current-voltage characteristics. interfacial causes growth nano stalagmite in yttria layer. This also responsible origin pseudo bipolarity RS...

Multiple quantum wells (MQWs) of CdZnO/ZnO are realized, for the first time, by dual ion beam sputtering (DIBS) system at different deposition conditions in terms power, substrate temperature, and time cessation between successive layers. The effects DIBS analyzed secondary mass spectroscopy (SIMS) high-resolution transmission electron microscopy (HRTEM) discussed systematically. SIMS analysis has been used depth profiling CdZnO/ZnO-based MQWs structure. MQW structure performed 100 °C with...

A chemiresistive carbon monoxide (CO) gas sensor comprising of an organo-di-benzoic acidified zinc oxide (ODBA-ZnO) nanohybrid material is reported. The ODBA-ZnO hybrid prepared via a single-pot hydrothermal method. electrical resistance the drop-casted film on interdigitated electrodes increases noticeably upon exposure to CO (5–500 ppm). increase attributed formation complex ions at organic (ODBA)–inorganic (ZnO) interface in presence CO. detailed sensing properties nanohybrids reveal...

We report a study to improve the ternary oxide Ni

The volatile organic compounds (VOCs) sensing device is developed by using hydrothermally grown vertically aligned 1D ZnO nanorods (ZnO NRs) on radio frequency sputtered ZnO/Pt/SiO 2 /Si substrate. Before the fabrication of sensor device, microstructure, morphology, and temperature stability NRs are characterized x‐ray diffraction, absorption emission spectrum, field scanning electron microscopy, thermal gravimetric analysis. Observation shows formation well‐vertically aligned,...

Electrolytic production of hydrogen from water is gradually gaining its importance among the other conventional processes in context renewable energy source utilization and environmentally clean technology. Worldwide research being carried out to make process cost effective. Apart different material construction electrodes, geometry also playing an important role developing efficient for electrolytic hydrogen.  However, no information available literature on this aspect. The aim paper study...

In the present study, Fe-doped barium borosilicate glass has been melted at 1250°C under microwave heating. The iron redox ratio (Fe(2+)/total Fe) in is investigated by two spectrophotometric methods. A novel decomposition technique optimized to measure ferrous oxidation state glass. Ferrozine was chosen as a specific complexing reagent; it forms deep violet color complex with Fe(2+) and broad absorbance peak centered ∼562 nm. 1,10-ortho-phenanthroline develops an orange (having ∼510 nm)...

This paper demonstrates an electrochemically deposited hybrid gas sensor containing ZnO and functionalized oligo(p -phenylenevinylene). The introduction of the organic moiety onto leads to enhancement in sensitivity. A systematic study using characterization techniques such as energy dispersive X-ray, field emission scanning electron microscope, X-ray diffraction indicates key role played by lamellar structure. As a sensor, response high 8.83 at 10 ppm ammonia have been observed. Also,...

An attempt has been made to develop a non-intrusive and robust technique for online process monitoring of hydrocyclones using commercially available vibration sensors. Vibration signals were captured first at the spigots 50.8 mm 76.2 diameter while water only different operating conditions. For denoising raw signals, wavelet-based method coupled with median filtering-based was used. The Root Mean Square (RMS) values accelerations induced in hydrocyclone found be proportional total volumetric...

Nanostructured blends of inorganic and organic materials could unwind unique properties boost performance over each individual constituent. We demonstrate here a hybrid photodetector containing ZnO functionalized oligo(p-phenylenevinylene), which was deposited electrochemically onto an electrode. XRD results reveal that the conjugates formed are lamellar in nature. As photodetectors, room-temperature responsivity as high 0.2 AW–1 at 330 nm with bias −20 V, maximum external quantum efficiency...

The rate of hydrogen production increases with increase in concentration potassium hydroxide and sodium solution as an electrolyte.It can be attributed to the electrical conductivity due KOH NaOH solution.Maximum 3 (N) concentrations both electrolytes were investigated within same range applied DC voltage.KOH electrolyte showed 14.77% higher performance than terms at extreme conditions present limits investigation.Effect on electrolysis was comparatively better (0.01-3.0 N).Investigation...

Drop-casting is a simple deposition technique where slurry-like solution of nanomaterial coated on small substrates, which are then allowed to dry under controlled temperature and pressure ambience. The present work focuses the tyrosine functionalized benzene-tri-carboxyamide (Tyr-BTC) ZnO composite based sensor deposited using drop-cast method for sensing carbon monoxide (CO) at room temperature. composition surface was varied by altering molar concentration constituents. performance...

Iron impurity in raw material remains a major challenge producing colourless glass. In this investigation, we report microwave (MW) heating capable of altering Fe-redox ratio (Fe2+/∑Fe) enabling preparation phosphate The effect Sn concentration retention Fe[II] glass melted MW was compared with conventional glasses. Colourimetric study developing Fe2+-ferrozine colour complex reveals ≥0.49 required to obtain heating, addition 1 wt.% metal powder can impart the desired whereas 1.9 is heating....