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Article
Influence of Net Do** Concentration on Carrier Lifetime in 4H-SiC Substrates
Lightly nitrogen-doped (N-doped) and vanadium-doped (V-doped) 4H-SiC single crystals grown by physical vapor transport were used to investigate the effect of net do** concentration on carrier lifetime. The c...
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Article
Hot-zone design and optimization of resistive heater for SiC single crystal growth
In recent years, SiC single crystal growth technology has been developed toward larger size and thickness to reduce the cost of SiC-based power devices. Resistance heating has gradually become a hot spot for r...
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Article
Liquid-like polymer lubricating surfaces: Mechanism and applications
Liquid-like polymer lubricating surfaces (LPLSs) are solid substrates with highly flexible polymer chains grafted via covalent bonds. This unique modification enables ultralow contact-angle hysteresis, repelle...
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Article
The preparation of bimetallic cerium/copper organic framework-derived CeCuOx/C NH3-SCR catalysts
The bimetallic Ce/Cu-MOF was synthesized by the room temperature hydrothermal method, and then the CeCuOx/C catalyst was obtained by in-situ pyrolysis method under nitrogen atmosphere. Moreover, their catalytic p...
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Article
A quasi-solid asymmetric supercapacitor based on MnO2-coated and N-doped pinecone porous carbon
Porous carbon is considered as one of the most promising electrode materials for supercapacitors. In this work, we report a simple two-step preparation of porous carbon materials based on MnO2-coated and N-doped ...
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Article
Novel electrode design of three-dimensional carbon foam modified with MnO2 nanosheet arrays for high-performance quasi-solid supercapacitor
In recent years, as a flexible electrode material, melamine foam has attracted more and more attention from researchers in the field of wearable energy storage devices. In addition, certain components are load...
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Article
Polyaniline-supported Al-doped MnO2@carbon cloth-based electrode material for quasi-solid-state flexible supercapacitor
As one of the most promising electrode materials for supercapacitors, MnO2 has the problems of low voltage window and poor conductivity. It has been shown that Al-doped MnO2 can effectively improve the voltage wi...
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Article
Superbroad-band actively tunable acoustic metamaterials driven from poly (ethylene terephthalate)/Carbon nanotube nanocomposite membranes
Actively tunable acoustic metamaterials have attracted ever increasing attention. However, their tunable frequency range is quite narrow (tens of Hz) even under ultrahigh applied voltage (about 1,000 V). Here,...
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Article
A high energy density flexible symmetric supercapacitor based on Al-doped MnO2 nanosheets @ carbon cloth electrode materials
The drawback of traditional capacitors with low energy density forces people to develop high-performance supercapacitor materials. Herein, the Al-doped MnO2 @ carbon cloth is selected as the ideal electrode mater...
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Article
Open AccessIdentifying defect-related quantum emitters in monolayer WSe2
Monolayer transition metal dichalcogenides have recently attracted great interests because the quantum dots embedded in monolayer can serve as optically active single-photon emitters. Here, we provide an inter...
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Article
Three-dimensional ordered hollow sphere composite Pt/TiO2-ZrO2: enhanced performance of photocatalytic degradation and photocatalytic hydrogen evolution
In this paper, a three-dimensional ordered hollow sphere (3DOH) structure composite Pt/TiO2-ZrO2 was prepared by using polystyrene (PS) colloidal spheres as the template and combining with two-step vacuum impregn...
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Article
Preparation of activated carbon nanotube foams loaded with Ag-doped TiO2 for highly efficient photocatalytic degradation under UV and visible light
Titanium oxide (TiO2) has been widely investigated as a photocatalytic material for degradation of organic pollutant in waste water. However, nanosized granular TiO2 nanoparticles are hard to be recycled and re-u...
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Article
Facile preparation of asymmetric phthalocyanine/multi-walled carbon nanotube hybrid material by in situ click chemistry
The asymmetrical zinc phthalocyanine–multiwalled carbon nanotube hybrid material (aZnPc–MWCNT) were successfully prepared by in situ click chemistry of 4-(m-tolyloxygen)-5-nitrophthalonitrile and 4-azide-phtha...
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Article
Aminosaccharide–gold nanoparticle assemblies as narrow-spectrum antibiotics against methicillin-resistant Staphylococcus aureus
Bacterial infection has continued to be a leading cause of death or disability worldwide because of antibiotic resistance. Antibiotic agents specific to certain taxa of bacteria, i.e., narrow-spectrum antibiot...
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Article
Facile ultrafine copper seed-mediated approach for fabricating quasi-two-dimensional palladium-copper bimetallic trigonal hierarchical nanoframes
Anisotropic Pd nanoparticles with highly branched morphologies are urgently needed as building blocks for nanoscale devices, catalysts, and sensing materials owing to their novel structures and unique physicoc...
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Article
Anomalous Resistivity in Vanadium-Doped Semi-Insulating 4H-SiC Wafers
The resistivities of vanadium-doped semi-insulating 4H-SiC wafers were measured by a contactless resistivity measurement system. Anomalous resistivity was found in semi-insulating 4H-SiC wafer. Raman spectra o...
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Article
Wetting and reaction of molten La with poly- and mono-crystalline MgO at 1323 K
Wetting of poly- and mono-crystalline MgO substrates by molten La was investigated at 1323 K in a high vacuum using a modified sessile drop method. The wettability seems to depend mildly on the substrate orien...
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Article
Open AccessEfficient synthesis of PbTe nanoparticle networks
The synthesis of semiconductor nanocrystalline networks using weak cap** ligands in aqueous media has been demonstrated. Carbohydrates, including ?-cyclodextrin, D-(+)-glucose, D-glucosamine, lactobionic acid, ...
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Article
Preparation and photoconductivity study of azo nanoparticles via liquid phase surfactant-assisted reprecipitation
4,4′-bis(1′-Azo-2′-hydroxy-3′-naphthoyl-o-chloroanide) oxazole (AZO) nanoparticles in size of 40–60 nm were prepared by the method of liquid phase surfactant-assisted reprecipitation. The AZO nanoparticles wer...
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Article
Coating of Silicon Nitride and its Colloidal Behavior