Abstract The effect of single-walled carbon nanotubes (SWCNTs) on the dielectric and conductivity properties of smectic A liquid crystal 4-nitrophenyl-4'- decyloxybenzoic acid has been studied. It was shown that the additive of SWCNTs with concentration of 0.5% leads to a decrease in the order parameter of the liquid crystal. In this case, the clearing point and the longitudinal component of the dielectric

Abstract A fast method for the synthesis of graphene oxide directly from a graphitic material via a one-step mechanochemical process without adding solvent, acid or oxidizing agents, is presented. Chemical, structural and morphological characterization of such material was carried on by Raman, FT-IR and UV/vis spectroscopies, Atomic Force Microscopy, X-ray Diffraction, Scanning Electron Microscopy

Abstract The equilibrium constant of the PLLA-C70 complex was determined spectrophotometrically and found at 1084 M−1, a value fully comparable with the equilibrium constant of the PLLA-C60 complex 956 M−1. In fact, both C60 and C70 share practically the same electron affinity and both are able to form charge-transfer complex with poly(L-lactic acid) (PLLA) in dichloromethane solution. The PLLA-C70

Abstract In this work, the TiO2@TixCyOz nanocomposite was obtained by adding a buffer gas to the initial mixture of reagents by the pulsed plasma-chemical method. Argon was used as a buffer gas. Pulsed plasma-chemical synthesis was realized using a TEA-500 electron accelerator. The physicochemical properties of the obtained TiO2@TixCyOz nanocomposites (morphology, average particle size, elemental,

Abstract We have worked out a selective and efficient mode of the synthesis of substituted and unsubstituted piperazine-containing mono-adducts of the C60 fullerene. It is based on the C60 reaction with piperazine, 2-methylpiperazine, and 2-oxopiperazine under air, room temperature and ultrasonication. The intermediate of the sonochemical reaction is radical anion C60 •–, which was detected with EPR

Abstract Carbon, being a material of the era, has vast usefulness in the synthesis of many novel compounds. One of them is graphene quantum dots (GQDs) have drawn a great deal of attention to the scientific community owing to their low cytotoxicity, higher optical stability, and tremendous photoluminescence (PL) property, which show a new insight in the field of bio-sensing and bio-imaging. Herein

Abstract Graphyne, a new two-dimensional carbon allotrope containing both sp and sp2 hybridized states, is a current topic of focus in nanomaterial research community. Taking gamma (γ)-graphyne as an example, we investigate the stain effect on its thermal transport properties by using the nonequilibrium Green’s function approach. The results show that the thermal conductance can be modulated continuously

Abstract The wettability behavior of materials is the subject of numerous scientific investigations due to its significance and relevance to wide range of applications. Here we present comparative analysis of the wettability properties of glass coated by carbon-based nanostructures. Glass surfaces were coated with carbon nanotubes, nanodiamonds, fullerenes, and graphene by drop casting method. These

Abstract 3′,3′-Bis-acetyl 3′H-cyclopropa[1,9](C60-Ih )[5,6]fullerene and 3′,3′-Bis-acetyl 3′H-cyclopropa[8,25](C70-D5h(6) )[5,6]fullerene monoadducts were obtained at room temperature via Bingel cyclopropanation reaction employing acetylacetone as ligand, DBU as base, carbon tetrabromide as intermediate for in situ formation of a bromomalonate and o-dichlorobenzene as solvent. Monoadducts were obtained

Abstract Common organic coatings are hardly conductive and seldom applied in electromagnetic shielding fields. Thereby, the thermoplastic conductive nanocomposites, waterborne silicon-acrylic emulsion (SAE) merged with multi-walled carbon nanotubes (MWCNTs) and silica sols (Si), were prepared via co-blending method. Compared with neat SAE, the conductivity of composite latex (5 wt.% MWCNT and 1.5 wt

Abstract Doxorubicin is an anticancer drug known for a variety of cancers. As a targeted drug, it is loaded onto branched graphene oxide nanoparticles (GONPs). In this research, polymeric coatings containing vinyl alcohol bonded of the fifth generation of dendrimers containing methyl methacrylate (MMA) and ethylenediamine (EDA) groups act as a responsive polymer. The precursors are polymerized to form

Abstract Pickering emulsion were used as soft template for the preparation of two different kinds of graphene-based aerogels (graphene aerogels, named AGAs and graphene/polyvinyl alcohol (PVA) aerogels, named BGAs) in this work. The Pickering emulsions show good control effect on the pore sizes, density and porosity of the two kinds of graphene-based aerogels. The increase of the oil/water ratio in

Abstract We synthesized decorated graphene oxide with CeO2 nanoparticles (CeO2-GO) hybridusing silane coupling agents, then we dispersed them in the epoxy resin after optimizing it at a weight fraction %1 using differential scanning calorimetry (DSC). The structural and morphological characterization was evaluated using Fourier Transform Infrared spectroscopy (FT-IR), scanning electron microscopy (SEM)

Abstract The aims of this study were to improve the low thermal stability of poly(vinylacetate) (PVAc) polymer by forming its nanocomposite products according to solvent casting method with multi-walled carbon nanotube (MWCNT) and/or modified (functionalized) MWCNTs, and to perform thermal kinetics analysis of the thermal properties improved nanocomposites. Functionalization of p-MWCNTs (purified MWCNT)

Abstract Effect of fullerenes C60 on dielectric relaxation, electric conductivity, and electro-optic properties of nematic liquid crystal 4-cyano-4′-pentylbiphenyl is investigated. It is shown that the inclusion of fullerenes into liquid crystal leads to decreasing of the clearing temperature and the order parameter. In this case, the transverse component of the real part of dielectric permittivity

Abstract The interaction of a charged particle and a rotating fullerene molecule in a fullerite crystal is investigated. The mathematical model was constructed and implemented for fullerene rotation frequencies up to 1014 Hz and velocities of an incident charged particle of the order of 103 m s−1. The study was carried out using the methods of classical molecular physics. The characteristics of the

Abstract Combination of sol–gel and sonochemical techniques is suggested for producing a nanostructured graphene–alumina hybrid, which is a promising raw material for manufacturing fine-grained ceramics. This study focuses on the use of dodecylamine both in the sol–gel synthesis of Al-containing particles and in sonochemical graphene exfoliation. It has been shown that, when forming graphene–alumina

Abstract The preparation of carbon dots (CDs) from different biomass source represents an interesting alternative to obtain these nanoparticles, mainly when they can be prepared using low-cost methods. In this work we have used a nitrogen-rich precursor, chitosan, to obtain CDs using two different methods, acid dehydration (AD) and hydrothermal carbonization (HC), with the aim to study the different

Abstract In this paper, multi-walled carbon nanotubes have been prepared at low synthesis temperatures and without high pressure by a simple chemical route. Fourier transformed infrared spectroscopy, Raman spectroscopy and X-ray diffraction analysis was used to determine the purity of the synthetized compound. Also, by transmission electron microscopy and atomic force microscopy, a diameter between

Abstract Alkynyl-functionalized graphene oxide (A-GO) is an integral part of the click chemistry of graphene. However, this kind of functionalization often occurs in organic solvent system. In this study, a simple method was used to prepare alkynyl-functionalized graphene oxide under mild and environmental-friendly conditions. The results showed that graphene oxide was successfully modified by propargylamine

Abstract Lysosomes, mitochondria, and Golgi apparatus are important organelles in cells. Organelle-targeting bioimaging is helpful to efficiently observe the morphology of organelles and plays an important role in investigating the physiological and pathological process of organelles. As a class of zero-dimensional nanomaterials, carbon dots (CDs) have attracted enormous attention in the field of organelle-targeting

Abstract The electromagnetic wave absorption performances and the dielectric properties of multi-walled carbon nanotube (MWCNT) functionalization with carboxyl (-COOH) group/cement composites with different shapes; chiral, zigzag and armchair were investigated. In this study, the influence of the sample thickness and the MWCNT shape on the electromagnetic wave reflection loss, insertion loss and absorption

Abstract Unzipped multi-walled carbon nanotube oxides (UMCNOs) were prepared from multi-walled carbon nanotubes by using oxidative unzipping method. Different concentrations of UMCNOs were coated on polyurethane (PU) foam through dip coating method. Changes in the surface texture of the polyurethane foam after coating with UMCNOs was observed using SEM analysis. The UMCNOs- PU foam exhibited good hydrophobicity

Abstract Polyethyleneimine (PEI) capped carbon nanoparticles (CNPs-PEI), gained by hydrothermal treatment of citric acid and PEI, were transformed into the polyelectrolyte capped CNPs (CNPs-PEI-NTf2) by HCl protonation process and anion exchange process between Cl− and bistrifluoromethanesulfonimide (NTf2 −). The CNPs-PEI-NTf2 exhibited superb comparability with polyethylene glycol (PEG200). Their

Abstract Pyrolytic carbon black (CBp) from truck tire pyrolysis is a heterogeneous material with relatively high ash content and a relatively high level of volatile bituminous matter (VBM) due to rubber pyrolysis residues coating the CBp surface. It is shown a method to volatilize and trap the VBM into an activated charcoal collector (Orbo-32 large) during a normal TGA scan of a CBp sample. Then, the

Abstract The development of efficient electrocatalyst for oxygen reduction reaction (ORR) is of great scientific interest. Multiwalled carbon nanotubes (MWCNTs), with large surface area, good electrical conductivity and mechanical strength, have been proven an ideal platform for the construction of novel electrocatalyst for ORR. Herein, a high-performance electrocatalyst for ORR was fabricated by in-situ

Abstract Graphene aerogels are super lightweight and highly compressible 3D graphene structure. In this research, graphene aerogels and graphene/single-walled carbon nanotubes (G/SWCNTs) nanocomposite aerogels were produced by freeze casting under ambient pressure without the need for vacuum apparatus. The mechanical experiments showed that both aerogels can withstand a strain of up to 90%, but in

Abstract The rise in fuel demand and lack of petroleum products helped to find diesel oil replacement. Therefore, in this study, we evaluated the corn biodiesel and its combustion characteristics improvements by the carbon-nanotube additive. The biodiesel (methyl-ester) was produced by transesterification process, as it was mixed with crude diesel (B20) to enhance the engine performance and emissions

Abstract In this article, we examined the state of fullerene C60 in toluene and its mixtures with acetonitrile in both diluted, (4.0 to 6.3)×10−6 M, and concentrated, (0.23 to 1.9)×10−3 М solutions, prepared by either equilibrium or non-equilibrium procedures. Typically, the working solutions were prepared by diluting stock solutions of fullerene in toluene. Some specific features of solid fullerene

Abstract This study focused on the evolution of hydration process of cement-based material containing high volume of dolomite powder. The hydration products, microstructure, morphology and mechanical property of cement-based material blended with dolomite powder were investigated by means of isothermal calorimetry, X-ray diffractometry (XRD), thermogravimetric analysis (TGA), scanning electron microscopy

Abstract A kinetic model of fullerene formation in the carbon-helium plasma of an arc discharge was proposed. In the model, in addition to the coagulation of carbon clusters, the cluster isomerization and their cooling with a buffer gas were taken into account. The simulation results of the fullerene formation are in qualitatively agreement with the experimental data, i.e., the fraction of higher fullerenes

Abstract A manufacturing process hand layup technique was used to produce carbon fiber/epoxy laminates with the epoxy matrix with a variation of 0.5 wt % to 2 wt% carbon nanotubes (CNTs). Microstructural observations of the composites from a scanning electron microscope show a better interaction between CNTs and epoxy. In this study, the mechanical properties of the carbon fiber-epoxy system and carbon

Abstract Bi2Te3 was incorporated in carbon fiber-reinforced cement composites (CFRCs) as thermoelectric-reinforced component via three different doping methods (uniformity volume mixing, gradient volume mixing, and gradient layer mixing), forming Bi2Te3 enhanced CFRCs. Seebeck coefficient and resistivity were measured for evaluating its thermoelectric properties. Scanning electric microscope (SEM)

Abstract The multi-modal imaging contrast agent has been attracted an increased interest to the tumor detecting and diagnosis in these recent years since the multi-modal imaging technology combines the advantages of several medical imaging modalities. A water-soluble fullerenol probe containing glypican-3 monoclonal antibody (GPC3-mAb) group mAb-GPC3-C60(OH)10-(TMIO)3-(NI)3 was synthesized by the incorporation

Abstract An experimental study of single-walled carbon nanotubes (SWNTs) subjected to liquid-phase oxidation with various acid solutions was carried out. The changes in the structure of SWNTs were estimated by the methods of Raman spectroscopy and X-ray structural analysis. Visible decrease of the oriented phase was revealed in the process of liquid-phase oxidation of the samples (the I G/I D-ratio

Abstract Concern on dyes-laden effluent has intensified over the years. Dyes are toxic, stable to light hardly bio-degraded and cause irreparable harm to living organisms. Adsorption is widely recognized as an effective way to remove colorants from wastewater. Nevertheless, the search for improving the efficiency of adsorption is constantly being carried out with the help of new cheap activated carbon

Abstract Physisorption of Benzaldoxime derivatives on the Fullerene has been assayed at the M06/6-311++G (d, p) level of theory. The Anti-isomers are more stable than Syn-geometries in the range of –1.8 to –5.6 kcal mol–1. Global reactivity descriptors showed that donor and acceptor functional groups increase and decrease reactivity of the BO compound as electrophile, specially –NH2 and –NO2 groups

Abstract Nitrogen doped graphene quantum dots (N-GQDs) have attracted much attention because of their superior electronic and optical properties. The preparation of N-GQDs can be usually performed via a top-down method using vairous nanocarbon as raw materials. However, most carbon materials are powder, which increases the difficulty of separating quantum dots from the reaction solution. Herein, we

Abstract Conformational transformations of unsubstituted 1,3-dioxane in the cavities of fullerenes with 60, 70 and 80 atoms in their shells have been investigated using PBE/3ζ density functional theory method. It was shown that the preferred conformation of the guest molecule in endoclasters with 60 atoms (С60, С12B24N24, B36N24) corresponds to the 1,4-twist form, not to the expected chair. In case

Abstract The adsorptions of hydrogen on Li-decorated nitrogen-substituted graphyne are investigated by density functional theory. The substitutional doping of nitrogen atoms can change the electronic structure of graphyne, which is beneficial to the adsorption of Li atoms. The results show that isolate Li atom is preferred to locate hollow site above the center of the acetylenic ring with binding energies

Abstract Efficient synthesis of large-scale vertically aligned nitrogen-doped carbon nanotube arrays (VA-NCNTs) has always been a challenge. In this study, we proposed a facile way to obtain mass VA-NCNTs between vermiculite layers by horizonal chemical vapor deposition (CVD). Vermiculite with layered compound as the catalyst substrate, Fe and Mo as the active metal phase is evenly distributed between

Abstract Acne vulgaris is a chronic skin disease of the pilosebaceous unit. Several pathophysiological associations have been identified in which Propionibacterium acnes plays a major role. Although there are a number of antibiotic therapies suggested for acne, many of them have limitations in their safety and efficacy. Therefore, there is a high demand to develop a safe alternative therapy for acne

Abstract The TiO2@C nanocomposite can be called a multifunctional material due to its unique physical and chemical properties. In the first part of the current study, the most widespread methods for producing TiO2@C nanocomposites were presented. They were divided into electrophysical and chemical methods. Chemical methods included the sol-gel method, the solvothermal and hydrothermal methods, the

Abstract In recent years, color removal processes from industrial wastewater which contains dyestuffs have gained great importance. Especially, textile industry wastewater with high volume and variable composition comes first among these wastewaters. These waters bring along many ecological and esthetic problems. In this study, unmodified and acid/base-modified wood charcoal derived from oak wood has

Electrochemical exfoliation method, which is one of the methods of producing graphene, is a suitable technique for the mass production of graphene in the industrial sense. However, the correct selection of electrochemical process inputs (electrolyte, applied voltage, etc.) is very important for graphene formation. Otherwise, thick fragmented graphites are formed. In this study, a method for producing

Abstract Due to the lack of comprehensive understanding of the formation mechanism, the preparation of carbon onions by arc discharge is still an uncontrollable process, which restrains their massive and stable production. Taking advantage of the transient nature of the arc discharge, we successfully captured the nanoparticle morphology in each growing stage during the carbon onion formation process

Chitosan (Chit) cross-linked via glutaraldehyde to graphene oxide (GO) was prepared as the basic nanocomposite support for further modification. The Chit/GO nanocomposite was modified with carbon nanotubes (CNT) and/or magnetite (Fe3O4), to separate the GO sheets even further and/or to render the nanocomposite magnetic. Palladium nanoparticles (Pd NPs) was embedded into the matrix of the nanocomposite

Abstract Relative populations of eight low-potential-energy IPR (isolated-pentagon-rule) isomers of Eu@C84 are computed using the Gibbs energy based on the B2PLYPD/SDD potential energy. The calculations agree with the recent observation that the major isomer is Eu@C 2(13)-C84 and the minor isomer is Eu@C 2(11)-C84. There are also other two minor isomers suggested by the calculations. Insufficient solubility

Abstract Removal of oil from water through absorbent materials such as graphene proves to be an excellent technique due to its simplicity and recoverability. However, there are several issues encountered such as poor structural integrity and complexity of the fabrication process. In this study, the hollow three-dimensional graphene (H3DG) grown using chemical vapor deposition technique is strengthened

Abstract Fullerenes are cubic polyhedral molecules made of carbon atoms. They have attracted much attention in the chemical and the mathematical literature. In the present paper, we compare the orbit and Hosoya entropies with the total energy of some classes of fullerenes to determine a correlation between these measures. Besides, we investigate the correlation between eigenvalues-based entropy and

DSC and calorimetric studies of multi-walled carbon nanotubes (MWCNTs) with average diameters in the range 7, 9 and 18 nm were carried out. MWCNTs were obtained by the CVD method. The kinetic processes in MWCNTs were studied from room temperature to 550 °C in a nitrogen flow using differential scanning calorimetry (DSC) on a Perkin – Elmer — 8000. It was found that exo- and endothermic peaks are not

Abstract Four types of film forming materials were used in graphene fire resistive coatings to investigate the fire protection, smoke suppression, water resistance and physical properties by corresponding tests. Firstly, weather resistance of emulsions was tested and evaluated. Additionally, distribution state of graphene in the emulsion was conducted by precipitation method test, particle size distribution

Abstract Exploring alternative Pt-free counter electrode with low cost and high electrocatalytic activity is always a main focus at the frontier of dye-sensitized solar cells (DSSCs). In this study, a desktop laser engraver was applied to reduce graphene oxide (GO) film on a fluorine-doped tin oxide (FTO) substrate, and the obtained graphene-based material was further used as counter electrode for

Abstract The influence of 3-(triethoxy silyl) propyl amine (TESPA) concentration on Multi Wall Carbon Nanotubes (MWCNTs) modification, is experimentally investigated. The MWCNTs modification were performed by 150, 75 and 25 weight percent (wt.%) of TESPA with respect to MWCNTs weight and the properties of the prepared samples were compared with each other and pristine MWCNTs. The MWCNTs silylation

Abstract C70 cycloadducts with sulfur–fullerene bond were previously unknown. We discovered that the sonochemical reaction of C70 with 1,2-hydroxythiols selectively produces the single 5,6-isomer of C70–1,4-oxathiane. The C70 •– radical anion was detected with EPR as a key intermediate of the reaction.

Two-mode valence electron configuration of carbon atoms lays the foundation of the unique two-mode amorphous state of the carbon solid. From the fundamentals of solid-state physics, sp3 and sp2 amorphous carbons are two different species characterized by conceptually different short-range orders, namely, groups of tetrahedrally bonded sp3 configured atoms and nanoscale size-restricted sp2 graphene

Abstract Two-mode valence electron configuration of carbon atoms lays the foundation of the unique two-mode amorphous state of the carbon solid. From the fundamentals of solid-state physics, sp3 and sp2 amorphous carbons are two different species characterized by conceptually different short-range orders, namely, groups of tetrahedrally bonded sp3 configured atoms and nanoscale size-restricted sp2

Abstract In this paper, nanoscale mechanical properties and failure behavior of graphene with Stone-Wales defect concentration were investigated using molecular dynamics simulations with the latest ReaxFFC-2013 potential that can accurately capture bond breakages of graphitic compounds. The choice of interatomic potential plays an essential role in capturing the deformation mechanism accurately. Stable

Abstract This manuscript is devoted to the study of the influence of the type of ions hydration on photoluminescence (PHL) of carbon dots (CDs) in aqueous suspensions. It is shown that ions with different hydration properties affect differently on CDs PHL. Positively hydrated cations increase the intensity of CDs PHL, and negatively hydrated cations weaken CDs PHL. The effect of the anions hydration

Abstract We studied the effect of covalent functionalization of graphene oxide (GO) and nanodiamond (ND) with octadecylamine (ODA) on bacterial growth (a series of experiments was performed also with pristine single-walled carbon nanotubes [SWNTs] for comparison). The bacteria tested were Escherichia coli and Staphylococcus aureus, which represent Gram-positive and Gram-negative types, respectively