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Free-standing fluorine and nitrogen co-doped graphene paper (FNGP) electrodes were synthesized by a solvothermal process as potential anodes for flexible sodium-ion batteries (SIBs). F and N co-doping in the graphene frameworks simultaneously increases structural defects, provides active sites, and enlarges the graphene interlayer distance; these properties are favourable for improving Na+ storage...
Combining heat transfer and high-temperature heat resistance is very important for realising thermal management in harsh environments. Achieving high heat conduction in the through-thickness direction (k⊥) is challenging for carbon fibre (CF) reinforced SiC matrix composite (CF/SiC) based heat resistant materials due to their anisotropic structures and weak bonding between the CF and the matrix. We...
Flexible anisotropic films manufactured from one-dimensional aligned nanomaterials can be potentially used in electronic skin and thermal interface applications due to their anisotropic properties. However, high anisotropy also makes the fabrication of aligned polymeric composites with a highly ordered structure and good interface properties very problematic. In this work, transparent, flexible, and...
Reduced graphene oxide (RGO) was decorated with well dispersed ZnO nanocrystals with narrow grain size distribution by a facile in-situ growth strategy. Zinc ions were absorbed on graphene oxide (GO) sheets through interaction with functional groups in absolute ethanol. After adding hydroxyl ions, the precursor of ZnO formed on GO sheets and crystallized after thermal treatment during which the GO...
All-carbon composites are ideal heat-dissipating materials because they possess a high thermal conductivity (K), excellent mechanical properties, high temperature resistance, low coefficient of thermal expansion, outstanding chemical stability, and so on. The rapid development of science and technology has put forward the need for a higher K of all-carbon composites. Different from individual carbon...
A three-dimensional (3D) carbon nanotube/exfoliated graphite block (CNT/EGB) was prepared by growing vertical aligned carbon nanotube (VACNT) at the surface of SiO2-coated exfoliated graphite plate (EGP) through chemical vapor deposition followed by hot-pressing. In such 3D CNT/EGB, EGPs were bridged by the VACNTs in the cross-plane direction, and the interface between EGPs and VACNTs was covalently...
The interaction between graphene and other materials is of great importance for its potential applications in nanotechnology. In this paper, by using all atom molecular dynamics simulations, we systematically investigate the self-assembly of fullerenes (diameter from 0.7 to 2.3nm) and graphene at room temperature (300K). It is found that single fullerene can be wrapped by graphene nanoribbon (GNR)...
A three-dimensional graphite consolidated composite (GCC) was prepared by the intercalation of carbon nanotubes (CNTs) at the interlayer of expanded graphite (EG) using chemical vapor deposition followed by hot-pressing. The intercalation of well-dispersed CNTs was attributed to the dispersion of catalysts at the interface of EG based on vacuum impregnation. The crystal orientation in the cross-plane...
A scheme is proposed for fabricating single wall carbon nanocones standing on metal surfaces with controlled sizes and cone angles by tailoring graphene sheets. A statistical model to examine the feasibility and stability of the cones has been developed. Combined with classical molecular dynamics simulations and ab initio calculations, the results show that cones with five different cone angles can...
Multi-walled carbon nanotubes (MWCNTs) were grafted onto carbon fibers (CFs) using an injection chemical vapor deposition method. The orientation and length (16.6–108.6μm) of the MWCNTs were controlled by the surface treatment of the CFs and the growth time, respectively. The interface between the MWCNTs and the CFs indicated the grafted CNTs were immobilized by embedding catalyst on CFs. Two orders...
Well graphitized carbon nano-onions (CNOs) with large yield have been synthesized by the catalytic decomposition of methane over an unsupported Ni–Fe catalyst at 850°C. The unsupported Ni–Fe catalyst was prepared by a reduction-substitution method. In the Ni–Fe alloy particle, α-Fe(Ni) phase (kamacite) transforms to γ-Fe–Ni phase at the high temperature for hydrogen reduction and chemical vapor deposition...
An azobenzene molecule (AZO) with a flexible alkyl chain was attached to the sidewall of few-walled carbon nanotube (FWCNT) to form a FWCNT-chain-AZO hybrid by covalent bonding. Transmission electron microscopy image shows individually well-dispersed FWCNT packed underneath AZO molecules. The flexible spacer between the FWCNT and the AZO led to the efficient photoisomerization and thermal reversibility...
An azobenzene (AZO) chromophore was covalently attached to graphene oxide (GO) through an amide linkage. The microstructure of the GO–AZO hybrid was characterized by microscopic and X-ray diffraction methods. An internal short-range ordered crystalline structure similar to graphite was observed. Spectroscopic evidence testified the strong electronic interactions between the AZO and GO in this GO–AZO...
A phthalocyanine derivative-2,11,20,29-tetra-tert-butyl-2,3-naphthalocyanine (NPc) was immobilized on graphene oxide (GO) to form a GO–NPc hybrid by the π–π stacking supermolecular method. Spectroscopic measurements showed that intermolecular interactions immediately happened after mixing the two components together and the resultant hybrid was stable even during the dilution process, which were related...
A chitosan (CS)-grafted multiwalled carbon nanotubes (MWCNT) composite (CS-MWCNT) was prepared via covalently grafting a biocompatible polymer CS onto the surfaces of MWCNT and was characterized by Fourier transform infrared spectroscopy (FTIR), ultraviolet–visible spectroscopy (UV–vis), and transmission electron microscopy (TEM). The interaction between MWCNT and CS was investigated and explained...
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