34,156 results match your criteria oxide layer

Ball milling sulfur-doped nano zero-valent iron @biochar composite for the efficient removal of phosphorus from water: Performance and mechanisms.

Bioresour Technol 2022 May 18:127316. Epub 2022 May 18.

School of Environmental & Safety Engineering, Liaoning Petrochemical University, Fushun 113001, China. Electronic address:

This study successfully prepared a novel sulfur-doped nano zero-valent iron @biochar ([email protected]) by modifying corn stover biochar with Fe and S using a mechanical ball milling method for effective phosphorus (P) adsorption in the waterbody. Batch experiments revealed that [email protected] (BC/S/Fe=3:1:1) reached a Q of 25.00 mg P/g and followed PFO and Langmuir models. Read More

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Nitrate respiration occurs throughout the depth of mucoid and non-mucoid Pseudomonas aeruginosa submerged agar colony biofilms including the oxic zone.

Sci Rep 2022 May 20;12(1):8557. Epub 2022 May 20.

Department of Microbial Infection and Immunity, Department of Orthopaedics, The Ohio State University, Biomedical Research Tower (BRT), 716, 460 W 12th Ave, Columbus, OH, 43210, USA.

Pseudomonas aeruginosa is an opportunistic pathogen and well characterized biofilm former. P. aeruginosa forms strong oxygen gradients inside biofilms due to rapid oxygen respiration in the top layers and the poor solubility of oxygen coupled with diffusion limited transport. Read More

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The interplay between atmospheric deposition and soil dynamics of mercury in Swiss and Chinese boreal forests: A comparison study.

Environ Pollut 2022 May 17:119483. Epub 2022 May 17.

State Key Laboratory of Environmental Geochemistry, Institute of Geochemistry, Chinese Academy of Sciences, Guiyang, 550081, China; Center for Excellence in Quaternary Science and Global Change, Chinese Academy of Sciences, Xian, 710061, China. Electronic address:

Taking advantage of the different histories of Hg deposition in Davos Seehornwald in E-Switzerland and Changbai Mountain in NE-China, the influence of atmospheric deposition on Hg soil dynamics in forest soil profiles was investigated. Today, Hg fluxes in bulk precipitation were similar, and soil profiles were generally sinks for atmospherically deposited Hg at both sites. Noticeably, a net release of 2. Read More

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Enhanced anti-corrosion and biocompatibility of a functionalized layer formed on ZK60 Mg alloy via hydroxyl (OH) ion implantation.

Colloids Surf B Biointerfaces 2022 May 2;216:112533. Epub 2022 May 2.

Center for Quantum Technology Research and Key Laboratory of Advanced Optoelectronic Quantum Architecture and Measurements (MOE), School of Physics, Beijing Institute of Technology, Beijing 100081, China; Beijing Academy of Quantum Information Sciences, Beijing 100193, China. Electronic address:

Magnesium and its alloys have piqued the interest of researchers due to their promising mechanical properties and biocompatibility. Moreover, the excessively fast corrosion rate of Mg alloys impedes their development in biomedical fields. Inspired by conventional ion implantation, a less-toxic functional group (hydroxyl) is used as the ion source to bombard the ZK60 Mg alloy surface to form a functionalized oxide layer. Read More

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Nitrogen-doped carbon armored Cobalt oxide hollow nanocubes electrochemically anchored on fluorine-doped tin oxide substrate for acidic oxygen evolution reaction.

J Colloid Interface Sci 2022 May 10;623:327-336. Epub 2022 May 10.

Department of Chemical Engineering, National Tsing Hua University, Hsinchu 30013, Taiwan. Electronic address:

Developments of non-precious metal based active and stable catalysts are of great importance and challenge to green hydrogen production from acidic electrocatalytic water splitting. Design of composite catalysts with synergy between active and stable components proves to be a promising approach. Herein, N-doped carbon armored CoO hollow nanocubes electrochemically anchored on fluorine-doped tin oxide (FTO) substrates are developed as efficient and stable catalysts for acidic oxygen evolution reactions. Read More

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Enhanced osteogenic differentiation of mesenchymal stem cells by surface lithium modification in a sandblasted/acid-etched titanium implant.

J Biomater Appl 2022 May 20:8853282221104242. Epub 2022 May 20.

School of Dentistry, 65498Kyungpook National University, Daegu, Korea.

This study investigated the osteogenesis-related cell functions of osteoprogenitor cells modulated by surface chemistry modification using lithium (Li) ions in a current clinical oral implant surface in order to gain insights into the future development of titanium (Ti) implants with enhanced osteogenic capacity. Wet chemical treatment was performed to modify a sandblasted/acid-etched (SLA) Ti implant surface using Li ions. The osteogenesis-related cell response to the surface Li ion-modified SLA sample was evaluated using two kinds of murine bone marrow stem cells, bipotent ST2 cells and primary multipotent mesenchymal stem cells (MSCs). Read More

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Remote Floating-Gate Field-Effect Transistor with 2-Dimensional Reduced Graphene Oxide Sensing Layer for Reliable Detection of SARS-CoV-2 Spike Proteins.

ACS Appl Mater Interfaces 2022 May 20. Epub 2022 May 20.

Pritzker School of Molecular Engineering, University of Chicago, Chicago, Illinois 60637, United States.

Despite intensive research of nanomaterials-based field-effect transistors (FETs) as a rapid diagnostic tool, it remains to be seen for FET sensors to be used for clinical applications due to a lack of stability, reliability, reproducibility, and scalability for mass production. Herein, we propose a remote floating-gate (RFG) FET configuration to eliminate device-to-device variations of two-dimensional reduced graphene oxide (rGO) sensing surfaces and most of the instability at the solution interface. Also, critical mechanistic factors behind the electrochemical instability of rGO such as severe drift and hysteresis were identified through extensive studies on rGO-solution interfaces varied by rGO thickness, coverage, and reduction temperature. Read More

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High CO-Tolerant Ru-Based Catalysts by Constructing an Oxide Blocking Layer.

J Am Chem Soc 2022 May 20. Epub 2022 May 20.

Collaborative Innovation Center of Chemistry for Energy Materials, State Key Laboratory of Physical Chemistry of Solid Surfaces, Tan Kah Kee Innovation Laboratory, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, PR China.

CO poisoning of Pt-group metal catalysts is a long-standing problem, particularly for hydrogen oxidation reaction in proton exchange membrane fuel cells. Here, we report a catalyst of Ru oxide-coated Ru supported on TiO ([email protected]/TiO), which can tolerate 1-3% CO, enhanced by about 2 orders of magnitude over the classic PtRu/C catalyst, for hydrogen electrooxidation in a rotating disk electrode test. This catalyst can work stably in 1% CO/H for 50 h. Read More

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Optoelectronic Properties of α-MoO Tuned by H Dopant in Different Concentration.

Materials (Basel) 2022 May 8;15(9). Epub 2022 May 8.

Siyuan Laboratory, Guangzhou Key Laboratory of Vacuum Coating Technologies and New Energy Materials, Guangdong Provincial Engineering Technology Research Center of Vacuum Coating Technologies and New Energy Materials, Department of Physics, Jinan University, Guangzhou 510632, China.

The optoelectronic properties of layered α-MoO are greatly limited due to its wide band gap and low carrier concentration. The insertion of hydrogen (H) can effectively tune the band structure and carrier concentration of MoO. Herein, first-principles calculations were performed to unravel the physical mechanism of a H-doped α-MoO system. Read More

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On Growth and Morphology of TiO Nanotubes on CP-Ti by Anodic Oxidation in Ethylene Glycol Electrolyte: Influence of Electrolyte Aging and Anodization Parameters.

Materials (Basel) 2022 May 6;15(9). Epub 2022 May 6.

Polytechnic Department of Engineering and Architecture, University of Udine, Via Cotonificio 108, 33100 Udine, Italy.

Anodic oxidation of CP-Ti, for production of TiO nanotubes, has been extensively described in terms of the electrochemical mechanism of tubular growth or the effect of the parameters on the final tube morphology. Recently, a kinetic growth model was proposed to describe the distinct morphologies of the anodic oxide layer as phases of the nanotubular development process, offering a new perspective for the tuning of nanotube production. In this work, the anodizing behavior of a CP-Ti alloy in an ethylene glycol electrolyte was investigated in light of this new model. Read More

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Corrosion Behavior of SiMo Cast Iron under Controlled Conditions.

Materials (Basel) 2022 Apr 29;15(9). Epub 2022 Apr 29.

Materials Research Laboratory, Faculty of Mechanical Engineering, Silesian University of Technology, 18A Konarskiego Street, 44-100 Gliwice, Poland.

The resistance of cast iron to chemical and electrochemical corrosion depends on the exposure conditions, chemical composition and the distribution of alloying elements in the microstructure. The article presents an attempt to describe the formation of a corrosion layer under controlled chemical corrosion conditions for SiMo ductile iron. In the experiment, a (HT-HRD) chamber for heating the samples with a controlled atmosphere was used, at the same time providing the possibility of testing the sample surface using the XRD method. Read More

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Effect of Pre-Oxidation Treatment on Corrosion Resistance of FeCoSiBPC Amorphous Alloy.

Materials (Basel) 2022 Apr 29;15(9). Epub 2022 Apr 29.

Central Iron and Steel Research Institute, Beijing 100081, China.

In this paper, the corrosion resistance of FeCoSiBPC amorphous alloy after pre-oxidation and non-oxidation heat treatment is investigated. The corrosion behaviors of FeCoSiBPC amorphous alloys in 1 mol/L NaCl solution were investigated by the electrochemical workstation. The pre-oxidation heat treatment can improve the corrosion resistance of FeCoSiBPC amorphous alloy through an increase in the Ecorr value from -0. Read More

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Evaluation of the Radiation Shielding Properties of a Tellurite Glass System Modified with Sodium Oxide.

Materials (Basel) 2022 Apr 27;15(9). Epub 2022 Apr 27.

Physics Department, Faculty of Science, King Khalid University, Abha 61413, Saudi Arabia.

In this study, the X-ray and gamma attenuation characteristics and optical properties of a synthesized tellurite-phosphate-sodium oxide glass system with a composition of (85 - x)TeO-10PO-xNaO mol% (where x = 15, 20, and 25) were evaluated. The glass systems we re fabricated by our research group using quenching melt fabrication. The shielding parameters of as-synthesized systems, such as the mass attenuation coefficient (MAC), linear attenuation coefficient (LAC), effective atomic number (Z), half-value layer (HVL), tenth value layer (TVL), mean free path (MFP), and effective electron density (N) in a wide energy range between 15 keV and 15 MeV, were estimated using well-known PHY-X/PSD software and recently developed MIKE software. Read More

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Investigation of Dry Sliding Friction, Wear and Mechanical Behavior of the Ti-6Al-7Nb Alloy after Thermal Oxidation.

Materials (Basel) 2022 Apr 27;15(9). Epub 2022 Apr 27.

Institute of Materials Engineering, University of Silesia, 75 Pułku Piechoty 1A, 41-500 Chorzów, Poland.

The mechanical and tribological characteristics of the Ti-6Al-7Nb alloy were investigated within a wide range of temperature and time parameters of thermal oxidation. The hardness, H and indentation modulus, E of the alloy in question, with and without an anti-wear oxide layer, were determined. The tribological properties of sliding couples were studied under technically dry friction conditions, using a ball-on-disc tribometer. Read More

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Facile Preparation of a Novel Vanillin-Containing DOPO Derivate as a Flame Retardant for Epoxy Resins.

Materials (Basel) 2022 Apr 27;15(9). Epub 2022 Apr 27.

Jiangsu Key Laboratory of Environmentally Friendly Polymeric Materials, Jiangsu Collaborative Innovation Center of Photovoltaic Science and Engineering, School of Materials Science and Engineering, Changzhou University, Changzhou 213164, China.

A novel bio-based flame retardant designated AVD has been synthesized in a one-pot process via the reaction of 9,10-dihydro-9-oxa-10-phospha-phenanthrene-10-oxide (DOPO), vanillin (VN), and 2- aminobenzothiazole (ABT). The structure of AVD was confirmed using Fourier transform infrared spectroscopy (FTIR), and H and P nuclear magnetic resonance spectroscopy (NMR). The curing process, thermal stability, flame retardancy, and mechanical properties of the epoxy resin (EP) modified with AVD have been investigated comprehensively. Read More

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High-Temperature Corrosion of Ni-Cr-Mo Cladding Layers with Different Si Contents in NaCl-KCl-NaSO-KSO Mixed Salt Medium.

Materials (Basel) 2022 Apr 27;15(9). Epub 2022 Apr 27.

Key Laboratory of Energy Transfer and System of Power Station of Ministry of Education, North China Electric Power University, Beijing 102206, China.

In this work, Ni-Cr-Mo cladding layers with different Si contents were prepared on Q235 steel using laser-cladding technology, and their corrosion characteristics were investigated in NaCl-KCl-NaSO-KSO mixed salt at 550 °C. The corrosion resistance of each cladding layer was tested by weight loss method, and the phase compositions and microstructures of the cladding layers and corrosion products were determined by X-ray diffraction (XRD) and scanning electron microscopy (SEM). The results show that Si contributed to the formation of a dense chromium oxide film on the surface, and the addition of Si can significantly improve the corrosion resistance of the cladding layer at high temperature. Read More

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Nanocomposites of Graphene Oxide-Silver Nanoparticles for Enhanced Antibacterial Activity: Mechanism of Action and Medical Textiles Coating.

Materials (Basel) 2022 Apr 26;15(9). Epub 2022 Apr 26.

Department of Nanobiotechnology, Institute of Biology, Warsaw University of Life Sciences, Ciszewskiego 8 Str., 02-786 Warsaw, Poland.

The resistance of microorganisms to antibiotics is a crucial problem for which the application of nanomaterials is among a growing number of solutions. The aim of the study was to create a nanocomposite (composed of graphene oxide and silver nanoparticles) with a precise mode of antibacterial action: what enables textiles to be coated in order to exhibit antibacterial properties. A characterization of nanomaterials (silver nanoparticles and graphene oxide) by size distribution, zeta potential measurements, TEM visualization and FT-IR was performed. Read More

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Study on the Surface of Cobalt-Chromium Dental Alloys and Their Behavior in Oral Cavity as Cast Materials.

Materials (Basel) 2022 Apr 22;15(9). Epub 2022 Apr 22.

Faculty of Dental Medicine, "Iuliu Hațieganu" University of Medicine and Pharmacy, 400012 Cluj-Napoca, Romania.

This study presents the correct processing of Co-Cr alloys as a method of preserving the properties of the materials as-cast, and therefore they can be safely placed in contact with the oral cavity tissues as resistance frameworks. The basic materials analyzed in this study were five commercial Co-Cr dental alloys with different components obtained in three processing steps. The analysis of the electrochemical behavior at the surface of the Co-Cr alloys was performed by electrochemical measurements: impedance spectroscopy (EIS), open circuit electrical potential (OCP), and linear polarization (LP). Read More

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Oxidation Behavior Characterization of Zircaloy-4 Cladding with Different Hydrogen Concentrations at 500-800 °C in an Ambient Atmosphere.

Materials (Basel) 2022 Apr 20;15(9). Epub 2022 Apr 20.

Department of Vehicle Engineering, National Taipei University of Technology, Taipei 106, Taiwan.

This study simulated the after-burned zirconium cladding oxidation in air at temperatures between 500 and 800 °C. The weight changes of Zircaloy-4 cladding with hydrogen contents of 100-1000 ppm continuously measured through thermogravimetric analysis (TGA) during oxidation tests at different temperatures in an air atmosphere. The TGA results indicate a transition of oxidation kinetics from a parabolic rate law to a linear rate law for as-received and hydrided Zircaloy-4 cladding. Read More

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Design of a Highly Sensitive Reduced Graphene Oxide/Graphene [email protected] Acetate/Thermoplastic Polyurethane Flexible Sensor.

Sensors (Basel) 2022 Apr 25;22(9). Epub 2022 Apr 25.

College of Light Industry and Food Engineering, Guangxi University, Nanning 530004, China.

As a substitute for rigid sensors, flexible sensing materials have been greatly developed in recent years, but maintaining the stability of conductive fillers and the stability of micro-strain sensing is still a major challenge. In this experiment, we innovatively prepared a polyurethane-based cellulose acetate composite membrane (CA/TPU) with abundant mesopores through electrospinning. Then, we reduced graphene oxide (rGO)-as a conductive filler-and graphene oxide (GO)-as an insulating layer-which were successively and firmly anchored on the CA/TPU nanofiber membrane with the ultrasonic impregnation method, to obtain an rGO/[email protected]/TPU sensor with a GF of 3. Read More

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Self-redox reaction driven in situ formation of CuO/TiCT nanosheets boost the photocatalytic eradication of multi-drug resistant bacteria from infected wound.

J Nanobiotechnology 2022 May 19;20(1):235. Epub 2022 May 19.

Department of Chemistry, National Taiwan University, Taipei, 10617, Taiwan.

Background: MXenes with interesting optical and electrical properties have been attractive in biomedical applications such as antibacterial and anticancer agents, but their low photogeneration efficiency of reactive oxygen species (ROS) and poor stability are major concerns against microbial resistance.

Methods: Water-dispersible single layer TiCT-based MXene through etching tightly stacked MAX phase precursor using a minimally intensive layer delamination method. After addition of Cu(II) ions, the adsorbed Cu(II) ions underwent self-redox reactions with the surface oxygenated moieties of MXene, leading to in situ formation of CuO species to yield CuO/TiCT nanosheets (heterostructures). Read More

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Photonic Bandgap Engineering in (VO)/(WSe)Photonic Superlattice for Versatile Near- and Mid-Infrared Phase Transition Applications.

J Phys Condens Matter 2022 May 19. Epub 2022 May 19.

Selcuk Universitesi, Meram, Konya, Konya, Konya, 42130, TURKEY.

The application of the photonic superlattice in advanced photonics has become a demanding field, especially for two-dimensional and strongly correlated oxides. Because it experiences an abrupt metal-insulator transition (MIT) near ambient temperature, where the electrical resistivity varies by orders of magnitude, vanadium oxide (VO) shows potential as a building block for infrared switching and sensing devices. We reported a first principle study of superlattice structures of VOas a strongly correlated phase transition material and tungsten diselenide (WSe) as a 2-dimensional transition metal dichalcogenide (TMD) layer. Read More

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Lithium Bromide-Induced Organic-Rich Cathode/Electrolyte Interphase for High-Voltage and Flame-Retardant All-Solid-State Lithium Batteries.

ACS Appl Mater Interfaces 2022 May 19. Epub 2022 May 19.

Department of Chemical Engineering, Tsinghua University, Beijing 100084, China.

Poly(ethylene oxide) (PEO)-based solid electrolyte suffers from limited anodic stability and an intrinsic flammable issue, hindering the achievement of high energy density and safe all-solid-state lithium batteries. Herein, we surprisingly found out that a bromine-rich additive, decabromodiphenyl ethane (DBDPE), could be preferably oxidized at an elevated voltage and decompose to lithium bromide at an elevated potential followed by inducing an organic-rich cathode/electrolyte interphase (CEI) on NCM811 surface, enabling both high-voltage resistance (up to 4.5 V) and flame-retardancy for the PEO-based electrolyte. Read More

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Defining the Role of Cr as a Reductant in the Hydrothermal Synthesis of CuCrO Delafossite.

Inorg Chem 2022 May 19. Epub 2022 May 19.

Department of Chemistry and Biochemistry, Auburn University, Auburn, Alabama 36849, United States.

The synthesis of nanocrystalline, p-type delafossite metal oxides (CuMO) via hydrothermal methods has been explored for a variety of energy conversion and storage applications. However, isolation of the pure phase ternary product is challenging due to the facile growth of unwanted, binary byproducts (CuO, CuO, and MO) which could ultimately influence the optoelectronic properties of the resulting nanocrystals. Here, we report on the optimized hydrothermal synthesis of CuCrO nanocrystals to limit the production of such byproducts. Read More

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Noncontact Human-Machine Interface Using Complementary Information Fusion Based on MEMS and Triboelectric Sensors.

Adv Sci (Weinh) 2022 May 18:e2201056. Epub 2022 May 18.

Department of Electrical & Computer Engineering, National University of Singapore, 4 Engineering Drive 3, Singapore, 117583, Singapore.

Current noncontact human-machine interfaces (HMIs) either suffer from high power consumption, complex signal processing circuits, and algorithms, or cannot support multidimensional interaction. Here, a minimalist, low-power, and multimodal noncontact interaction interface is realized by fusing the complementary information obtained from a microelectromechanical system (MEMS) humidity sensor and a triboelectric sensor. The humidity sensor composed of a two-port aluminum nitride (AlN) bulk wave resonator operating in its length extensional mode and a layer of graphene oxide (GO) film with uniform and controllable thickness, possesses an ultra-tiny form factor (200 × 400 µm ), high signal strength (Q = 1729. Read More

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Improving HfO-Based Resistive Switching Devices by Inserting a TaO Thin Film via Engineered In Situ Oxidation.

ACS Appl Mater Interfaces 2022 May 18. Epub 2022 May 18.

King Abdullah University of Science and Technology (KAUST), Thuwal 23955-6900, Saudi Arabia.

Resistive switching (RS) devices with binary and analogue operation are expected to play a key role in the hardware implementation of artificial neural networks. However, state of the art RS devices based on binary oxides (e.g. Read More

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Enantioselective recognition of esomeprazole with a molecularly imprinted sol-gel-based electrochemical sensor.

Mikrochim Acta 2022 May 19;189(6):225. Epub 2022 May 19.

Department of Analytical Chemistry, Faculty of Pharmacy, Ankara University, Ankara, Turkey.

A simple, selective, and accurate electrochemical chiral sensor based on molecularly imprinted polymer (MIP) has been developed for sensitive and selective detection of esomeprazole (ESOM). For this purpose, the porous MIP sensor was prepared using tetraethyl orthosilicate (TEOS) and cetyltrimethylammonium bromide (CTAB) in the presence of β-cyclodextrin (β-CD) as a chiral recognizing element on a glassy carbon electrode (GCE). The changes in the MIP-layer related to removal and rebinding of the target ESOM were performed via differential pulse voltammetry (DPV) and cyclic voltammetry (CV) by using [Fe(CN)] as the redox probe. Read More

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Nonahybrids that consisit of p-type, nitrogen-doped ZnO and graphene nanostructures: synthesis, photophysical properties, and biosensing application.

Nanotechnology 2022 May 18. Epub 2022 May 18.

Hangzhou Dianzi University, Hangzhou Dianzi University, Hangzhou, 310018, CHINA.

ZnO, a promising material for optoelectronic applications, has attracted considerable attention due to its wide and direct band gap and large exciton binding energy. To understand the applications of this material, fabrication of high quality p-type ZnO is a key step. However, a reliable p-type doping of this material remains a major challenge. Read More

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Polycaprolactone-blended cellulose acetate thin-film composite membrane for dairy waste treatment using forward osmosis.

Environ Sci Pollut Res Int 2022 May 17. Epub 2022 May 17.

Department of Metallurgical Engineering & Materials Science, Indian Institute of Technology Bombay, Powai, Mumbai, 400076, India.

In recent years new sustainable technology for wastewater treatment has emerged, and among them, forward osmosis (FO) has gained importance. FO utilizes osmotic pressure difference across the semipermeable membrane as the driving force to concentrate the wastewater. Further, the surface and physical properties of the semipermeable FO membrane play a crucial role during the FO process in reducing the internal concentration polarization. Read More

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High-Entropy Perovskite as a High-Performing Chromium-Tolerant Cathode for Solid Oxide Fuel Cells.

ACS Appl Mater Interfaces 2022 May 16. Epub 2022 May 16.

Mechanical & Aerospace Engineering Department, West Virginia University, Morgantown, West Virginia 26506, United States.

To achieve chromium tolerance and high performance, a new series of high-entropy perovskites (HEPs) are investigated as cathode materials for solid oxide fuel cells (SOFCs). Multiple rare-earth, alkaline-earth, and high-order transition metal elements are used for the A-site of this ABO structure. A pure phase is achieved through the designed combination of different elements in seven out of eight candidates. Read More

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