Abstract In this study, we have analyzed twist angles between layers at which the bilayer graphene (BLG) layer structure is periodic. In addition, the dependence of interlayer binding energies on the BLG layer’s twist angles was calculated using the atom-atom potential method. It was established that at small twist angles (below 4°) the interlayer binding energy changes monotonically, free of local

Abstract A silver nanoprism solution was prepared by reacting silver nitrate (AgNO3), trisodium citrate dihydrate (C6H5Na3O7·2H2O), sodium borohydride (NaBH4), and ascorbic acid (C6H8O6) in distilled water. The successful formation of the silver nanoprisms was confirmed by UV–visible spectroscopy considering the 350–400 nm and 600–650 nm wavelength ranges. The C60 fullerene nanowhisker-silver nanoprism

Abstract The paper presents the results of experimental studies in the scope of formation of bulky aluminum based composite materials (CM) with carbon nanofibers (CNF), including the research methods of hot extrusion and rolling. Extrusion manufacture of bulky composite materials contributes to obtain billets with a minimum compression degree (λ = 1.5). To reduce shear deformations and formation of

Abstract The calculation of the three-dimensional structure of crystals of fifteen polymorphic varieties of graphene functionalized with fluorine was carried out by the atom-atom potential method. The energy and electronic properties of fluorographene crystals were calculated by the density functional theory method in the generalized gradient approximation. It was established that the distances between

Abstract In this article, we study the resolvent energy and the pseudospectrum energy of a sequence C12n of fullerenes with exactly 12n carbon atoms. In particular, the resolvent energy of these fullerenes together with their lower bounds are obtained.

Abstract The Unidentified Infrared bands (UIBs or UIRs) known also as Aromatic Infrared Bands (AIBs) represent a series of discrete infrared emission bands detected in numerous and very different astrophysical objects. The carriers of these infrared bands have not yet unambiguously identified. The MAONs model proposes that the carriers of the UIBs could be described by an “average” chemical structure

Abstract Graphene oxide (GO) was prepared through the modified Hummar’s method. The polymer nanocomposites (PNC) composed of polyvinylidene fluoride (PVDF) and GO, with different wt% of GO were prepared, following the solution casting method in the form of thin films. The micro/nano-structural features and the optical properties of the PNC have been studied. The formation of GO was confirmed through

Abstract Graphene oxide (GO) is a sp2 hybridized carbon atom arranged in a honeycomb lattice. Graphene is a new allotrope of carbon compound which could prime new openings in research fields. GO was successfully synthesized via Phyllanthus Emblica (PE) leaf. Structures, morphologies and photo catalytic activities of the as synthesized nanomaterial were determined by using X-Ray diffraction (XRD), UV-Visible

Abstract Aiming to solve/respond the mist of the carbon-networking crisis by the present and foreseen global turbulences, either of economic, bionic, or ecologic nature, one may advance the next level approach to the cluster-to-metacluster of nano-technology mutagenesis: astralisation. Viewed as the new symmetrical/asymmetrical based openness, it surpasses the global limits of networking “contagion”

Abstract As one of the main ingredients in the traditional Chinese medicine Gastrodia elata, p-hydroxybenzaldehyde (PHBA) has many pharmacological effects. Therefore, the monitoring of PHBA level is of great significance to exact valuation of the pharmacokinetics and toxic effect of PHBA in body fluids. In order to achieve the sensitive detection of PHBA, nitrogen-doped carbon dots (NCDs) have been

Abstract For extraction of higher fullerenes and endohedral metallofullerenes (EMF) with yttrium from fullerene-containing carbon soot (soot) obtained by combined spraying of graphite and yttrium oxide powders in an arc plasma, we developed a device (Extractor*) that provides mechanical activation effects on agents combined with filtration. It has been shown that the soot recovery percentage of a mixture

Abstract As one of the most effective energy storage compounds, phase change materials (PCMS) play an important role in energy conservation and storage. However, the inherent poor thermal conductivity and liquid leakage of PCMS seriously limit their practical application. Polyethylene glycol·calcium chloride (PEG·CaCl2) phase change materials filled with three-dimensional carbon fiber network were

Abstract As the demand for alternative energy sources grows, new electrode materials for electrochemical supercapacitors are being developed. Heteroatom doped rGO sheets have attracted much attention in recent time. S and N doped rGO was prepared at various temperatures by a simple and low cost hydrothermal method in the present work. The successful formation of S and N doped rGO sheets is confirmed

Abstract This paper presents the results of a study of the effect of the graphite nanoplates (GNP) concentration on the tribological and rheological characteristics of grease lubricants based on used motor oils and calcium soaps. GNP were obtained by the original electrochemical method. Grease lubricants were tested for residual water content, dropping point, penetration, and wear limit. The size of

Abstract Nanodiamonds combine unique mechanical, thermodynamic and optical properties of diamond with the peculiarities of colloidal dimensions and wide possibilities of chemical modification of their surface. Of particular practical interest is the presence of a branched porous structure inside detonation nanodiamond agglutinates in powders. Application of moderate (up to 1.5 GPa) static pressures

Abstract The tribological and rheological characteristics of three industrially produced greases and a model lubricant (medical vaseline) doped with new carbon nanoflakes additives (few layer graphite nanofragments, LGF and their nitrogen-containing analog, N-LGF) have been studied. It is shown that the modification of carbon structure with heteroatoms can significantly reduce friction coefficient

Abstract In this work, the influence of the material of the contact sublayer and the growth temperature on the geometric dimensions and the value of the piezoelectric response of carbon nanotubes for their use in nanopiezotronic devices is investigated. The thermodynamic laws that characterize the processes occurring in the "catalyst/sublayer/substrate" system have been established. It was found that

Abstract The possibility of stabilizing aqueous dispersions of carbon nanotubes (CNTs) using phenol-formaldehyde resin (PFR) and aminocumulene (AC) is shown. The preliminary oxidation of CNTs contributes to their higher solubility in the presence of these stabilizing agents. The concentration of pristine and oxidized CNTs in weakly alkaline solutions containing 2.5 g/L of PFR is 3.0 and 11.4 g/L, respectively

Abstract The paper considers the redistribution of the charge density in a carbon nanotube caused by the adsorption of a lithium atom on it. The effective lithium charges were calculated according to the methods of Mulliken, Voronoi, Bader, Hirshfeld, CM5, DDEC6. It is shown that these methods can result in different charge amounts, but the qualitative behavior of the relative charge does not depend

Abstract In this article, we compute several distance-based topological indices dendrimers. Indeed, based on the distances of related graphs, we investigate the distance-based complexity of these graphs. We also, determine an orbit entropy measure of these structures based on the size of orbits. The analysis results obtained by computing the correlations between given numerical data shows that the

Abstract In this paper, by a hydrothermal method and using sucrose and silver nitrate, carbon nanospheres and high purity Ag@C core-shell nanostructures were prepared. The samples were characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), EDX and FTIR spectroscopy. The average diameter of the carbon spheres, Ag@C core-shells and their core were measured 250, 350 and 55 nm, respectively

Abstract Fullerene graphs are mathematical models of fullerene molecules. The Wiener (r,s)-complexity of a fullerene graph G with vertex set V(G) is the number of pairwise distinct values of (r,s)-transmission trr,s(v) of its vertices v: trr,s(v)=∑u∈V(G)∑i=rsd(v,u)i for positive integer r and s. The Wiener (1,1)-complexity is known as the Wiener complexity of a graph. Irregular graphs have maximum

Abstract Nanodiamonds (NDs) offer numerous advantages in nanotechnology owing to their unique physicochemical properties. Their chemical stability, natural fluorescence and high absorption capacity make NDs advantageous to be used in many fields including nanomedicine, nano-cosmetics and biomedicine. Recent investigations suggest that NDs can scavenge reactive oxygen species (ROS) therefore act as

Abstract In this research, the synthesis and swelling behavior of a hydrogel nanocomposite based on acrylamide, graphene oxide and polypopamine have been investigated. The synthesis was performed by grafting with optimal values to achieve a hydrogel with high water absorption swelling capacity. The polymerization reaction was performed in an aqueous medium in the presence of an ammonium persulfate

Abstract To enhanced photocatalytic activity of TiO2 nanotubes, graphene was transferred on the surface of TiO2 nanotubes by wet transfer method. The results showed that the introduction of graphene reduced the band gap of composites and inhibited the recombination of photoinduced electrons and holes. Therefore, the degradation rate of the graphene/TiO2 nanotubes composites is about 44% higher than

Abstract In this study, a growth mechanism of vertically aligned carbon nanotubes (VACNT) on a nanostructured porous silicon template (NPSiT) was proposed based on the experimental observations obtained. Camphor oil and ferrocene (Fe) were used as a carbon source and a catalyst, respectively. The NPSiT was optimised and used as a template to synthesise VACNT. The VACNT was synthesised on NPSiT by using

Abstract Owing to the rapid expansion of preparing a low-cost and pure carbon nanotubes (CNTs) from large available raw materials as cheap carbon precursors and catalyst depositions via chemical vapor deposition process, Algerian condensate gas over Ni/Al2O3 was used in this study. Response surface methodology was utilized to assess and optimize the preparation parameters. Synthesis of CNTs was studied

Abstract We support the general understanding that deleterious effects induced by hyperglycemia in rats would be alleviated by means of antioxidant treatment. Also, we have been supported and encouraged by many explorations on the usage of fullerenols for treating diabetic complications. Our present study aims to examine the potentials of fullerenols against diabetes in streptozotocin-induced diabetic

Abstract Onion-like fullerenes possess distinctive physical and chemical performance, and thus are believed to have great significance in theoretical study and engineering applications. In this exploratory research, we introduced a novel way, namely electrochemical reduction method performed in aqueous solution at room temperature and very low voltages, for preparing a film composed of onion-like fullerene

Abstract We investigated the influence of horizontal and longitudinal strain on the electronic proprieties of Stone-Wales defected honeycomb graphene structure using the density functional theory. Tensile and compressive uniaxial strains were independently applied on the armchair (horizontal) and the zigzag (longitudinal) directions of a defected honeycomb graphene monolayer. We found the responses

Abstract Cerium oxide/graphene oxide (CeO2/GO) nanocomposite has been prepared by solvothermal method in N,N-dimethylformamide (DMF) and used as an excellent catalyst for Ciprofloxacin (CIP) degradation in water under ultrasound. The scanning electron microscopy (SEM), transmission and X-ray photoelectron spectrum (XPS) data confirmed that the CeO2 nanoparticles were successfully decorated on the surface

Abstract Particularly large surface area and well-defined nanoparticles are both critical in the issue of nonporous carbons for challenging energy, catalyst and environmental fields. Therefore, following the ecological regulations regarding the quality of fuels, the environment agency calls for sulfur free fuels. In parallel, the presence of metals species in feedstock is deleterious for the various

Abstract Combinatorial techniques are outlined through generalization Sheehan’s version of Pόlya’s theorem extended to all irreducible representations of the dihedral point group aimed at applications to nanotube enumerations. Furthermore we invoke the Euler Totem function for a cylindrical nanotube of any length and circumference. General expressions for the generalized character cycle indices are

Abstract CNT based nanocomposites are known to have superior mechanical properties, such as elastic modulus (E), tensile strength (σ), etc., compared to other nanocomposite materials. Traditionally E of the nanocomposites is measured by direct methods like the three-point bend test, four-point bend test, etc., which are destructive. However, it is possible to determine their E value by an indirect

Abstract A multifunctional hybrid curing component (GSD) for epichlorohydrin-modified novolac resin (ENR) was synthesized via grafting poly(amidoamine) (PAMAM)-modified silica nanoparticles (SD) on graphene oxide (GO) using a ring opening reaction. SD and GSD, as two different curing components, were also used in different contents as reinforcing fillers of ENR matrix. Fourier-transform infrared spectroscopy

Abstract The addition of graphene as an efficient nano-filler to different polymer matrices lead to a substantial improvement in different physical properties which, as a result, pave the way towards promising applications. In this work, Polystyrene (PS) was reinforced with different low loadings of graphene oxide (GO). The latter was prepared according to the Hummers method. The incorporated weight

Abstract The lithium-ion battery is subject to the limited theoretical specific capacity of electrode materials, which is difficult to achieve capacity breakthrough. However, the theoretical specific capacity of the sulfur cathode for lithium-sulfur battery is 1675 mAh g−1 and the energy density is 2600 Wh kg−1. However, lithium-sulfur batteries suffer from three problems: “shuttle effect,” sulfur

Abstract Based on first-principles density functional theory (DFT) calculations, we systematically studied the potential application of a new two-dimensional carbon allotrope nanomaterial C568 in Lithium-ion batteries (LIBs) in this paper. Results show that the average adsorption energy of Li over fully-charged monolayer C568 is −0.25 eV, which guarantees the good stability of the C568 during the charging

Abstract In this paper, bovine serum albumin served as the initial materials for preparing a kind of cyan-emitting fluorescent protein nanoparticles (BSA NPs). The BSA NPs were further adopted as a template to synthesize protein nanoparticles-stabilized silver nanoclusters (BSA NPs@Ag NCs) that offered two well-separated fluorescence emission peaks respectively at 470 nm and 670 nm. Dopamine could

Abstract Functional or smart coatings (organic, inorganic, or hybrid) are formed by materials that can be adapted for many applications where they should be able to perform a well-defined set of functions, such as improving chemical, mechanical, electrical, and magnetic properties of the substrate. This project studied the anticorrosive efficiency of nanoaditivated pigment-free epoxy coating by the

Abstract In the present paper, a new approach for detonation nanodiamond (DND) deagglomeration is proposed. DND agglomerates of the size from 20 to 200 nm have been exposed to wet sonication assisted oxidative treatment with ozone under UV irradiation (Advanced Oxidation Process). Subsequent sonication and centrifugation gave a stable hydrosol of individual DND particles with negative zeta potential

Abstract Nano-C-S-H seed crystal, as an early strength agent for cement-based materials, has great application prospects. In order to investigate the effect of nano-C-S-H seed crystal on the early-age hydration process of Portland cement, in this article, low-field nuclear magnetic resonance (NMR) technology with 1H as a probe was used to in situ monitor the microstructure evolution of cement paste

Abstract Herein, a novel catechol sensor made of double-layers of functionalized multi-walled carbon nanotubes coated zinc oxide on a glassy carbon electrode (fMWCNTs/ZnO@fMWCNTs/GCE) is synthesized. The FTIR spectrum reveals that the ZnO NPs are successfully functionalized on the fMWCNT while SEM analysis shows granular colloids on the surface of ZnO@fMWCNTs nanocomposites. The XRD study confirms

Abstract To study the effect of different modification reagents on activated carbon (AC), HNO3, H2SO4, H2O2, H2C2O4, and H3PO4 were chosen to modify AC. Then a series of Mn/AC catalysts were prepared by impregnation method. The denitrification performance and SO2 adsorption activities of these catalysts were tested. The results indicated that the catalyst prepared by HNO3-modified AC has both the highest

Abstract Graphene is synthesized and characterized using rice husk as a source with carbonization and potassium hydroxide (KOH) activation process. It has functional groups at the edges with a smooth surface. Graphene is melt-mixed with 50/50 (wt/wt) polypropylene (PP)/polyamine-6 (PA6) in the presence and absence of a compatibilizer. The compatibilizer used is polypropylene grafted maleic anhydride

Abstract In this research, novel magnetic Graphene Oxide/Fe3O4/Thiourea/Cethyltrimethyammonium Bromide nanocomposites were designed and fabricated as an efficient adsorbent in the service of micro-solid phase extraction for preconcentration of Tartrazine (Tar) before UV-Vis spectrophotometric detection. This adsorbent was fully characterized by Fourier Transform Infrared (FT-IR) spectroscopy, Scanning

Abstract A carbon nitrogen film was formed by chemical vapor deposition on a brass sheet starting from cyanurate of melamine as a precursor, at a temperature of 600 °C. The film was easily detached, and thoroughly characterized by means of various techniques, including X-ray photoelectron spectroscopy, X-ray diffraction, UV-Vis and infrared spectroscopies, and scanning and transmission microscopy.

Abstract In this work, a nanocomposite was developed by in-situ polymerization using industrial-grade diatom-containing silicone rubber (SR) as the matrix and reduced graphene oxide (RGO) as filler. The Concentration of RGO, was very low, varying from 0 to 1 wt%. In these nanocomposites, diatoms as well as RGO flakes of sizes smaller than 20 µm were dispersed homogeneously within the SR. According

Abstract Recently, high-performance energy storage devices are urgently needed due to the rapid development of miniaturized, portable and high performance electronic equipment. In this work, we present a facile sol-gel technique followed by electrochemical deposition for synthesizing carbon nanoparticles electrode that exhibits the potential to be used as both positive as well as negative supercapacitor

Abstract Cement-based composites with thermoelectric effect have important application prospects in alleviating urban heat island effect, low-energy snow and ice melting on winter roads, and low-cost scale energy conversion and harvesting. Great progress has been made in the study of the thermoelectric properties of cement-based composites enhanced with carbon materials, and the addition of carbon

Abstract In this study, graphene was incorporated into a micro-arc oxidation coating to improve the wear and corrosion resistance of AZ31 alloy. For this purpose, the different concentration of graphene particles was used as 0 g/l, 0.5, 1, and 2 g/l. The wear tests were performed under loads of 2, 4, and 8 N. The composition and morphology of the coatings were investigated by scanning electron microscopy

Abstract The hydrogen-peroxide encapsulation into C60 is evaluated using the DFT (M06-2X) and B2PLYPD as well MP2 calculations in the standard 6-31++G** and 6-311++G** basis sets. The H2O2 encapsulation is attractive, yielding an energy gain of about 12 kcal/mol. Such substantial encapsulation energy could allow for the high-temperature and high pressure synthesis (originally used for encapsulation

Abstract Carbon nanotubes (CNT) have high surface area and absorption capabilities and the absorption capacity of multi-walled CNTs (MWNTs) enables paramagnetic nanotubes to be obtained by absorbing iron salts. Characterization of paramagnetic MWNTs was performed with TEM, FTIR, DSC, and VSM. Paramagnetic CNTs are used for the purification of water from heavy metals and plastic originated compounds

Abstract Co-Fe-Mg-Al quaternary hydrotalcite-carbon nanotube composites (LDH-CNT composites) were prepared by co-precipitation method and blended into concrete. Universal testing machine and SHPB testing device were used to carry out static and dynamic tests on LDH-CNT concrete specimens with different LDH-CNT additions (0, 0.25 wt.%, 0.5 wt.%), and the dynamic constitutive equation was obtained according

Abstract In this study, we report a simple, rapid, and efficient strategy for the fabrication of 3 D porous graphene fibrous materials(EGF) via open flame thermal expansion of RGO fiber(GF), which was prepared via chemical reduction and self-assembly of graphene oxide in our previous work. The 3 D EGF possesses high specific surface area and capacitance up to 1674.66 m2/g and 110 F/g, good electrical

Abstract A possibility was examined to enhance carbon-epoxy laminated composite mechanical properties by introducing a small concentration of reinforcing nanostructures – multi-wall onion-shaped fullerene-like nanoparticles of tungsten disulfide IF-WS2, and its multi-layer hollow nanotubes, INT-WS2, both known for their outstanding thermal, chemical, and mechanical resistance. Composite structures

Abstract The article presents the first consideration of virtual vibrational spectrometry of big molecules as a branch of the overall digitalization. The concept ability is illustrated by the example of fullerene C60. Connected in a single chain, digital twins, virtual devices and IT products related to the molecule and its isomers significantly enrich standard pool of molecular spectroscopic knowledge

Abstract In recent years, lots of stress has been laid on impregnating polymer nanocomposites with carbon nanotubes (CNTs) to impart multifunctional properties. To yield the maximum benefits, it is imperative that proper dispersal of CNTs and a resilient interfacial bonding between polymer and CNTs is achieved. Chemical functionalization is widely used on the surface of CNTs to prevent their agglomeration

Abstract Carbon nanodots are one of the latest intriguing members of the nanocarbon family due to their improved aqueous solubility, low-cost production, good conductivity, nontoxic behavior, high biocompatibility, and eco-friendly nature in contrast to chemically derived carbon nanomaterials. In the present study, the water-soluble carbon nanodots were synthesized by using the one-step hydrothermal

Abstract While using hydrothermal method we obtained nanocrystal nickel molybdate hydrate (NiMoO4). Its further calcination at 400 °C enabled us to obtain α-phase of NiMoO4 hydrate. The modification of physical and chemical properties of prepared NiMoO4 hydrate was being done with the aid of powerful laser radiation with the further composite formation on its basis. We have established the interconnection