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.
Human mesenchymal stem cells (hMSCs) hold great promise for bone regeneration, yet the direction of MSC proliferation and induction of MSC differentiation remain challenging. Very recently, graphene provides a novel substrate for cell culture. Here, we report the utilization of mineralized three dimensional graphene (3DG) scaffolds for hMSC growth. The nano-structured hydroxyapatite (HA) particles...
In this paper, vertical graphene nanosheets (VGNs) were grown by PECVD method. Based on SEM, TEM, Raman and XPS spectrum analysis, the defect-guided growth mechanism of the VGNs was proposed. The effects of defects on the formation of VGNs were discussed in detail. In addition, different densities of defects were produced on the grown VGNs by adjusting different Ar ion sputtering durations. Contact...
In present work, we demonstrate a synchronous carbonization and graphitization process to produce nanoporous graphitic carbon materials, using glucose as carbon source, and Ni-Dimethylglyoxime-complex, Ni(dmgH)2, as graphitization agent. The carbon samples exhibit good graphitic feature at the low carbonization temperature of 800 °C, with the BET surface area of 584 m2 g−1, and pore volume of 0.76 cm...
Hybrid graphene aerogels (HGA) consisting of graphene oxide (GO) and graphene nanoplatelets (GNP) were prepared and introduced into polyethylene glycol (PEG) via vacuum impregnation, aiming at obtaining composite phase change materials (PCMs) with high thermal conductivity, outstanding shape-stabilization, high energy storage density, commendable thermal repeatability and the ability to light-to-heat...
A simple wet chemical method has been used to prepare MoSx in situ grown on graphene oxide (MoSx/GO) as a highly active and stable electrocatalyst for hydrogen evolution reaction (HER). The role of the oxygen-containing functional group on the surface of GO with different oxidation degrees have been studied for obtaining MoSx/GO with excellent electrochemical activity for HER. The electrochemical...
Four types of luminescent nitrogen-doped carbon dots (C-dots) are prepared by using glucose (G) or citric acid (C) as carbon source, and dopamine (D) or 4,7,10-trioxa-1,13-tridecanediamine (T) as nitrogen source, named GD-C-dots, GT-C-dots, CD-C-dots and CT-C-dots. The investigation on the optical, pH-sensitivity and photovoltaic properties of these C-dots illustrates that nitrogen source plays a...
In this study, carbon quantum dots (CQDs)/bismuth oxyiodide (BiOI) materials have been synthesized via a reactable ionic liquid (IL) 1-hexyl-3-methyl-imidazolium iodine assisted solvothermal method. The introduction of IL was beneficial to construct the tight junctions between CQDs and BiOI. Based on the initial formation of strong-coupling between CQDs and IL, the tight junctions between CQDs and...
We have revealed that molecular oxygen breaks into carbon nanotubes forming active sites to abstract hydrogen from propane. Various carbonaceous species (carbon defects and debris) on carbon nanotubes were identified and their effects on the oxo-functionalization as well as the catalytic performance in the oxidative dehydrogenation of propane were thoroughly investigated. The results indicate that...
With the development of terahertz (THz) anti-radar technology, the demands for new antireflection coating technology and materials based on impedance matching mechanism have increased significantly. Herein, the reflection impedance matching properties of p-polarized THz wave at a randomly stacked multi-layer graphene interface is studied using both experiment and theory at oblique incidence. The experiment...
A novel carbon microspheres composed of N-doped hollow carbon nanospheres was prepared by a newly developed three-step method. Firstly, poly(styrene-co-butyl acrylate)/polypyrrole (PSBA/PPy) latex particles with core–shell structure were synthesized by the chemical oxidative polymerization of pyrrole in poly(styrene-co-butyl acrylate) (PSBA) emulsion, then PSBA/PPy core–shell latex was dried by spray...
The graphene/carbon nanotube (CNT) hybrids are considered as one of the most advanced nanostructures with intrinsically self-dispersion properties for large-volume applications. However, owing to the limited understanding on the complex growth mechanism and non-linear kinetics, rational design of growth procedures and related multiphase reactors for the production of the hybrids remain great challenges...
A transparent graphene oxide layer on a non-conductive poly(ethylene terephthalate) film was treated by a new active screen plasma technology at temperatures ranging from 100 °C to 200 °C in pure hydrogen and in a gas mixture of hydrogen and nitrogen. To study the thermal reducing effects of the active screen plasma, parallel thermal annealing treatments were also carried out at the same temperatures...
Generating magnetism in graphene and preserving its extraordinary properties are essential to the development of graphene-based spintronics. By using first-principles calculation methods, we propose a new scheme based on compensated n–p codoping and non-covalent π–π stacking with F4-TCNQ, to engineer some hybrid structures of Fe/graphene/F4-TCNQ. Our results firstly show that F4-TCNQ adsorption on...
Carbon fiber reinforced polymers (CFRP) have been increasingly used in aircraft structures. However, their relatively low electrical conductivity leads to the vulnerability to lightning strike. Herein, the carbon nanotube buckypaper-based coatings composed of conductive buckypaper and insulating adhesives were developed to protect the CFRP laminates. Their influence on the lightning strike protection...
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.