Conductive cellulose nanocrystals with high cycling stability for supercapacitor applications
A facile method of polymerizing polypyrrole (PPy) on poly( <italic>N</italic> -vinylpyrrolidone) (PVP) coated cellulose nanocrystals (CNCs) was developed.
Materials Literature
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Monolithic NPG nanoparticles with large surface area, tunable plasmonics, and high-density internal hot-spots
Plasmonic metal nanostructures have shown great potential in sensing, photovoltaics, imaging and biomedicine, principally due to the enhancement of local electric field by light-excited surface plasmons, i.e., collective oscillation of conduction band electrons. Thin films of nanoporous gold have received a great deal…
Soft-template synthesis of 3D porous graphene foams with tunable architectures for lithium–O 2 batteries and oil adsorption applications
We report a general emulsion soft-template method to synthesize porous graphene foams for multi-functional applications, including lithium–oxygen batteries and oil-adsorption.
Controllable copper deficiency in Cu 2− x Se nanocrystals with tunable localized surface plasmon resonance and enhanced chemiluminescence
Copper chalcogenide nanocrystals (CuCNCs) as a type of semiconductor that can also act as efficient catalysts are rarely reported. Herein, we study water-soluble size-controlled Cu(2-x)Se nanocrystals (NCs), which are copper deficient and could be prepared by a redox reaction with the assistance of surfactants. We fou…
van der Waals density functionals built upon the electron-gas tradition: Facing the challenge of competing interactions
The theoretical description of sparse matter attracts much interest, in particular for those ground-state properties that can be described by density functional theory. One proposed approach, the van der Waals density functional (vdW-DF) method, rests on strong physical foundations and offers simple yet accurate and r…
Intensification of bioactive compounds extraction from medicinal plants using ultrasonic irradiation
Extraction processes are largely used in many chemical, biotechnological and pharmaceutical industries for recovery of bioactive compounds from medicinal plants. To replace the conventional extraction techniques, new techniques as high-pressure extraction processes that use environment friendly solvents have been deve…
Preparation and characterization of few-layer MoS 2 nanosheets and their good nonlinear optical responses in the PMMA matrix
Due to the relatively weak van der Waals (VDW) force between interlayers, few-layer MoS2 nanosheets are prepared using a simple ultrasonic exfoliation method and incorporated into PMMA. The good nonlinear optical (NLO) property of the MoS2/PMMA composite for the nanosecond pulsed laser at both 532 and 1064 nm has been…
Poly(vinyl butyral) based polymer networks with dual-responsive shape memory and self-healing properties
In this work, polymer networks are prepared by a simple cross-linked reaction of poly(vinyl butyral) (PVB) and hexamethylene diisocyanate. The cross-linked reaction was evaluated by Fourier transition infrared spectroscopy, degree of swelling and gel content. The polymer networks show high mechanical strength with ten…
Honeycomb-like NiO/ZnO heterostructured nanorods: photochemical synthesis, characterization, and enhanced UV detection performance
Honeycomb-like NiO/ZnO heterostructured nanorods (NRs) were fabricated by a simple photochemical deposition method. The morphology of the NiO nanostructures can be rationally tailored by changing the concentration of the solution, reaction time and annealing temperature. A reasonable formation mechanism of the honeyco…
Controllable aggregation-induced emission based on a tetraphenylethylene-functionalized pillar[5]arene via host–guest recognition
A novel TPE-functionalized pillar[5]arene (TPEP5) was successfully synthesized, and the motion of the TPE motif was restricted via pillararene-based host–guest recognition-mediated cross-linking, resulting in the efficient “turn-on” of fluorescence emission based on the AIE mechanism.
Crystal structure of Au 25 (SePh) 18 nanoclusters and insights into their electronic, optical and catalytic properties
The crystal structure of selenolate-capped Au25(SePh)18(-) nanoclusters has been unambiguously determined for the first time, and provides a solid basis for a deeper understanding of the structure-property relationships. The selenolate-capped Au25 cluster shows noticeable differences from the previously reported Au25(…
Immobilization of transition metal (Fe2+, Co2+, VO2+ or Cu2+) Schiff base complexes onto graphene oxide as efficient and recyclable catalysts for epoxidation of styrene
Transition metal (Fe2+, Co2+, VO2+ or Cu2+) Schiff base complexes were immobilized onto graphene oxide previously functionalized with 3-aminopropyltriethoxysilane (3-APTES). X-ray diffraction (XRD), IR spectroscopy, thermal gravimetric analyses (TGA) and inductively coupled plasma atomic emission spectroscopy (ICP-AES…
Tailored surfaces of perovskite oxide substrates for conducted growth of thin films
Oxide electronics relies on the availability of epitaxial oxide thin films. The extreme flexibility of the chemical composition of ABO3 perovskites and the broad spectrum of properties they cover, inspire the creativity of scientists and place perovskites in the lead of functional materials for advanced technologies.…
Insights into organogelation and its kinetics from Hansen solubility parameters. Toward a priori predictions of molecular gelation
Many small molecules can self-assemble by non-covalent interactions into fibrous networks and thereby induce gelation of organic liquids. However, no capability currently exists to predict whether a molecule in a given solvent will form a gel, a low-viscosity solution (sol), or an insoluble precipitate. Gelation has b…
Development of high power and energy density microsphere silicon carbide–MnO2 nanoneedles and thermally oxidized activated carbon asymmetric electrochemical supercapacitors
In order to achieve high energy and power densities, a high-voltage asymmetric electrochemical supercapacitor has been developed, with activated carbon (AC) as the negative electrode and a silicon carbide-MnO2 nanoneedle (SiC-N-MnO2) composite as the positive electrode. A neutral aqueous Na2SO4 solution was used as th…
Metals & polymers in the mix: fine-tuning the mechanical properties & color of self-healing mussel-inspired hydrogels
Ways to orchestrate the mechanical properties and colors of mussel-inspired metal cross-linked hydrogels based on DOPA functionalized cationic polymers are demonstrated. This is achieved by systematically varying the hardness of the coordinating metal and/or the cationic polymer.
Effect of Surface Treatment on the Properties of Pineapple Leaf Fibers Reinforced Polyamide 6 Composites
In order to improve compatibility and composite properties of pineapple leaf fibers/polyamide 6 composite, alkaline and silane treatments were conducted for fiber modification. Effect of fiber surface treatment on the properties of the composites was investigated. Untreated and treated fibers were raw (R-PALF), alkali…
Single-layer Group-IVB nitride halides as promising photocatalysts
In order to construct efficient solar-driven devices, many potential materials have been explored in search of desirable photocatalyts for water splitting. Layered structure nitride halides have received significant attention from different fields because of their unusual electronic properties. In this work, we have s…
A donor–acceptor–donor conjugated molecule: twist intramolecular charge transfer and piezochromic luminescent properties
A donor-acceptor-donor molecule, , showed typical twist intramolecular charge transfer at the excited state and piezochromic property. XRD, DSC and computational researches revealed that the collapse of the crystalline structure upon applying pressure caused the piezochromic phenomenon, while the fluorescence was reco…
The Study of Competitive Adsorption of Heavy Metal Ions from Aqueous Solution by Aminated Polyacrylonitrile Nanofiber Mats
Aminated polyacrylonitrile(APAN) nanofiber mat was a surface modification of electrospun polyacrylonitrile (e-spun PAN) with diethylenetriamine (DETA). It was developed for the removal of Ag(I), Cu(II), Pb(II) and Fe(II) from aqueous solution. The results showed that adsorbent has the highest adsorption capacity for A…