The Infona portal uses cookies, i.e. strings of text saved by a browser on the user's device. The portal can access those files and use them to remember the user's data, such as their chosen settings (screen view, interface language, etc.), or their login data. By using the Infona portal the user accepts automatic saving and using this information for portal operation purposes. More information on the subject can be found in the Privacy Policy and Terms of Service. By closing this window the user confirms that they have read the information on cookie usage, and they accept the privacy policy and the way cookies are used by the portal. You can change the cookie settings in your browser.
Interfacial load transfer plays a critical role in the bulk mechanical performance of nanofiber-reinforced metallic-matrix nanocomposites (MMNC). In this paper, we investigate the mechanical strength of interfaces in double-walled carbon nanotube (CNT)-reinforced aluminum (Al) nanocomposites by using in situ electron microscopy nanomechanical single-tube pull-out techniques. The nanomechanical measurements...
Exploring low-cost and highly efficient non-precious metal electrocatalysts toward oxygen reduction reaction is crucial for the development of fuel cells. Herein, we report the synthesis of bamboo-like N-doped carbon nanotubes with encapsulated Fe-nanoparticles through high-temperature pyrolysis of multiple nitrogen complex consisting of benzoguanamine, cyanuric acid, and melamine. As-prepared catalyst...
It has been recently demonstrated that moiré pattern formed between graphene and supporting crystalline substrate can modulate atomic friction [1–3] which provides a novel strategy to control friction at the nanoscale. Despite the high potential of this new approach, its underlying mechanism is still unclear. Using molecular dynamics (MD) simulation, we reveal that moiré pattern induced lateral force...
Carbon nanotubes (CNT) have been recently proposed as stabilizers against grain growth that can happen even at low temperature inputs in nano-crystalline and ultrafine-grained materials obtained by severe plastic deformation. In this study, we analyzed the evolution of the structural defects on the nanotubes in CNT-reinforced nickel matrix composites with different reinforcement weight fractions....
Titanium dioxide (TiO2) has been widely investigated as a photocatalytic material. However, the photocatalytic activity of TiO2 is suppressed by the large band gap and the recombination rate of the electron-hole pairs. Here, we propose an in situ synthetic strategy for the construct of carbon doped TiO2 (carbon-TiO2) nanotubes using surface-sulfonated layer of polystyrene fibers/titania composites...
Graphitic carbon nitride (g-C3N4) has been considered as a promising metal-free catalyst for a wide range of application due to its intriguing properties. However, the photocatalytic performance is restricted by the small specific surface area (SSA) and limited active sites. Here, a facile one-step method was employed to prepare thin porous g-C3N4 with large SSA by condensation of urea. During the...
Organic Solid-Solid Wetting Deposition (OSWD) enables the fabrication of supramolecular architectures without the need for solubility or vacuum conditions. The technique is based on a process which directly generates two-dimensional monolayers from three-dimensional solid organic powders. Consequently, insoluble organic pigments and semiconductors can be made to induce monolayer self-assembly on substrate...
Linear elastic fracture mechanics establishes the conditions necessary for crack arrest by the introduction of a hole in its path. However, it is unclear how nanoscale crack-vacancy interaction manifests itself at the atomistic level. In this study, we employ molecular dynamics simulations to investigate the nanoscale crack-vacancy interaction in graphene by performing nanoscale uniaxial tensile test...
Graphene has demonstrated excellent field emission performance, however, the emitted-current shows irreversible decline. The cause of this decline has not been clearly studied or thoroughly identified, which limits application of graphene as field emitters. In this work, accompanied by the decay of emission currents, the damage to few-layer graphene sheets was observed for the first time by introducing...
Single-walled carbon nanotubes (SWCNTs) hold vast potential for future electronic devices due to their outstanding properties, however covalent functionalization often destroys the intrinsic properties of SWCNTs, thus limiting their full potential. Here, we demonstrate the fabrication of a functionalized graphene/semiconducting SWCNT (T@fG) heterostructured thin film transistor as a chemical sensor...
Electrical and electronic applications of carbon nanotube (CNT) fibers require new methods to join them with other live parts of the circuits electrically and mechanically. In this study, the meniscus-confined localized electrochemical deposition (LECD) from a simple aqueous electrolyte was developed as a feasible method to precisely join CNT fibers with copper substrates in an open air environment...
Carbon nanotube (CNT) hierarchical composites are increasingly identified as next-generation aerospace materials, so it is vital to evaluate their long-term structural performance under aging environments. In this work, the durability of hierarchical CNT grafted aluminoborosilicate microfiber-epoxy composites (CNT composites) are compared against aluminoborosilicate composites (baseline composites),...
Based on the spontaneous redox reaction between metal and graphene oxide, a novel type of metal/graphene oxide (M/GO) batteries is developed to convert chemical energy into electricity, including Li/GO, Na/GO, Zn/GO, Fe/GO, and Cu/GO batteries. They are fabricated via the simple assembly of metal foils with GO films, in which M plays the role of anode, and GO acts as both cathode and separator. Among...
We use grand canonical Monte Carlo simulation to investigate the adsorption of a CO2/N2 mixture in neutral and charged (7, 7) carbon nanotube (CNT) arrays. It is found that both the adsorption of CO2, and the CO2/N2 selectivity are either enhanced or reduced when the charges are positive or negative. The CO2/N2 selectivity in a CNT bundle carrying +0.05e charge with intertube distance of 0.335 nm...
Based on the molecular dynamic (MD) simulations, radial-deformation capabilities of super carbon nanotubes (SCNTs) are investigated under uniaxial tension. The investigations uncover the excellent reversible and adjustable radial-shrinkage characteristics of SCNTs, which are caused by the hierarchical assembly of carbon nanotubes (CNTs). MD simulations show that reversible-deformation ranges of SCNTs...
Graphene oxide materials can be prepared in manifold synthesis approaches and allow for further post-functionalization to adopt the properties of the desired application. Small sized sheets with lateral dimensions on the 100 nm scale are e.g. beneficial for cell applications. Breakage of sheets by liquid phase processing is an ideal way to generate such nano-sized sheets. However, until now it is...
With the development of wearable electronics, fiber-based supercapacitors with both high energy and power densities are under growing demand. Herein we discovered a high performance fiber-based asymmetric supercapacitor (FAS) based on two carbon nanotube (CNT) composite fibers. MnO2 nanosheets were in situ grown on a CNT fiber to serve as the positive electrode, while polyimide was deposited onto...
Arc discharge synthesis of single-walled carbon nanotubes (SWCNTs) remains largely uncontrollable, due to incomplete understanding of the synthetic process itself. We show that synthesis of SWCNTs by a carbon arc may not constitute a single continuous process, but may instead consist of two distinct modes. One of these, a “synthesis-on” mode, produces the majority of the nanomaterials. During the...
The thermal transport growth of various metal oxide (MOx) nanostructures using graphene as a catalytic layer was studied. Graphene was synthesized by Cu-catalyzed chemical vapor deposition and transferred onto a SiO2-covered Si substrate using bubble transfer methods. Due to the catalytic activity of the atomic-thick carbon layer, control of the position of the MOx nanostructures as well as the growth...
Thermogravimetric analysis (TGA), X-Ray diffraction (XRD), Fourier transform infrared spectroscopy (FTIR), Raman spectroscopy (RS) and High-resolution transmission electron microscopy (HRTEM) techniques were used to characterize soot gathered from a conventional automotive diesel engine fueled by ultra-low sulfur diesel, gas-to-liquid (GTL), biodiesel, and a diesel fuel derived from sugar cane named...
Set the date range to filter the displayed results. You can set a starting date, ending date or both. You can enter the dates manually or choose them from the calendar.