Abstract
Functionalized graphene-based nanocomposites have opened new windows to address some challenges for increasing the sensitivity, accuracy and functionality of biosensors. Polyaniline (PANI) is one of the most potentially promising and technologically important conducting polymers, which brings together the electrical features of metals with intriguing properties of plastics including facile processing and controllable chemical and physical properties. PANI/graphene nanocomposites have attracted intense interest in various fields due to unique physicochemical properties including high conductivity, facile preparation and intriguing redox behavior. In this article, a functionalized graphene-grafted nanostructured PANI nanocomposite was applied for determining the ascorbic acid (AA) level. A significant current response was observed after treating the electrode surface with methacrylated graphene oxide (MeGO)/PANI nanocomposite. The amperometric responses showed a robust linear range of 8–5,000 µM and detection limit of 2 µM (N = 5). Excellent sensor selectivity was demonstrated in the presence of electroactive components interfering species, commonly found in real serum samples. This sensor is a promising candidate for rapid and selective determination of AA.
1 Introduction
Biosensors have attracted much attention due to their unique properties such as simple procedure, easy production, fast response and cost efficiency [1,2,3]. Polyaniline (PANI) is a semi-flexible conducting polymer of the organic semiconductor family [4], which has attracted intensive interest as a result of remarkable features including superior conductivity [5], environmental stability [6], intriguing redox process [7] and inexpensive starting material [8]. In multidisciplinary areas, various applications for PANI have been reported such as biosensors, supercapacitors, biofuel cells, actuators, corrosion protection, membranes, solar cell devices, and rechargeable batteries [4,9,10,11,12]. Tunable properties, good processability (facile synthesis process), affordability, suitable electrochemical and environmental stability, strong bimolecular interactions and intriguing acid/base and doping/dedoping properties have made PANI a promising polymer among inherently conducting polymers [10].
Graphene, a single layer of carbon atoms with sp2 chemical bonds, is the base for all nanoscale carbon materials such as fluorine bucky balls and carbon nanotubes (CNTs) [13,14,15,16,17,18,19,20]. Simple production procedures in comparison with other carbon nanomaterials and several properties, including zero band gap, high conductivity, flexibility, exceptional chemical stability, extremely wide porous structure, high specific surface area, high mobility of charge carriers and cost efficiency, make the graphene a promising nanomaterial for the next era [21]. Graphene-based materials have been extensively used in biosensor applications due to their exceptional electrical, electrochemical and optical characteristics [22,23].
Nanocomposites have attracted much attention due to their exceptional properties [17,24,25,26,27,28,29,30,31,32,33,34,35,36,37,38,39,40,41]. Mechanical performance and electrical conductivity are the main characteristics that are developed with the combination of various materials into a nanocomposite [42,43,44,45,46]. Recently, conductive nanocomposites have captured the great interest in bioelectronics and biosensing fields [47]. Among them, graphene-grafted PANI nanocomposites are valuable owing to their excellent characteristics [48,49,50]. Combination of conducting polymers into a conductive nanostructure enhances the capacity, sensitivity, selectivity and electrical conductivity depending on the preparation methods and morphology. There are π-conjugated electrons in both graphene and PANI. These composites possessed several features including enhanced mechanical strength and excellent electrical conductivity [51]. Also, graphene-grafted PANI nanocomposites are utilized for preparing the electrode substrates. Recently, graphene-grafted PANI nanocomposites with excellent electrochemical characteristics and great conductivity have been utilized for numerous purposes such as biosensors, energy storage tools and electrochemical devices [6].
Ascorbic acid (AA), a reducing agent and successful antioxidant, plays some roles in preventing radical-induced ailments such as tumors and neurodegenerative [14,52]. The deficiency of AA can cause scrubbing, whereas its overdose can lead to stomach cramps and diarrhea [53]. The determination of AA levels is critical for diagnosis of food ingredients. There is a crucial necessity for determining AA level for healthcare and food quality/security due to the healthiness and industrial worth of AA and its low dose in biological and food samples [52].
Electrochemical methods have established rapid and low-cost performance as well as fast response with high selectivity, stability and sensitivity in determining some biomolecules and analytes [54]. Nanostructured composites such as palladium (Pd) nanowire-modified graphene [55], multiwall CNTs dispersed in polyhistidine [56], Fe3O4@gold (Au)-loaded graphene [57] and ZnO nanowire on hierarchical graphene [58] were reported for developing the sensitivity and selectivity of AA. Moreover, other nanocomposites including graphene-grafted PANI [52], graphene-supported platinum (Pt) nanoparticles [59], over-oxidized polypyrrole, PdNPs/Au [60] and 3D graphene foam CuO nanoflowers [61] have been exploited for determining AA.
Our group previously synthesized NFG/AgNPs/PANI for AA biosensing, which was more complex and expensive [52]. Moreover, we synthesized methacrylated graphene oxide (MeGO)/PANI nanocomposite and characterized it by physiochemical and electrochemical tests [6]. In this study, a simpler nanocomposite based on MeGO-grafted PANI is applied as electrochemical biosensor that has several benefits including cost efficiency, high sensitivity and good selectivity over AA determination. The linear range and detection limit of the sensing device are 8–5,000 and 2 µM, respectively. This platform shows the excellent stability over electroactive compounds.
2 Materials and methods
2.1 Chemicals
The potassium ferricyanide (K3Fe(CN)6), potassium permanganate (KMnO4), sulfuric acid (H2SO4), potassium nitrate (KNO3), sodium nitrate (NaNO3) and graphite fine powder (spectroscopic grade, particle size ≤50 µm) were obtained from Merck. Aniline (99%), dimethylformamide, phosphate-buffered saline (PBS), N-hydroxysuccinimide and 1-ethyl-3-(3-dimethylaminopropyl) carbodiimide hydrochloride were purchased from Sigma.
2.2 Synthesis of MeGO
Graphite oxide was synthesized via the modified Hummer method [62]. Then, MeGO nanomaterials were prepared based on our previous studies [21,49].
2.3 MeGO-grafted FTO electrode
For preparing the amended electrode substrate, FTO glass plates (8 resistance) with the surface area of 0.25 cm2 were provided and sequential ultrasonic cleaning was performed for 10 min in isopropanol, ethanol, acetone and deionized (DI) water. Under Ar gas flow, the FTO sheets were dried. Then, MeGO suspended in DI was deposited (20, 30 and 40 µL) on the FTO surface by the cast coating method, and it was allowed to dry at 45°C, and the optimum volume was selected (40 µL).
2.4 Electropolymerization of aniline
Electropolymerization of PANI on the electrode surface was established according to our previous study [6]. Briefly, electrodepositing PANI on the MeGO-grafted FTO was initiated with 20 successive cyclic voltammograms (CVs) in a solution consisting of 0.03 M aniline monomer. Then, 0.5 M H2SO4 was applied on the electrode surface.
3 Results and discussion
Transmission electron microscopy (TEM) and field emission scanning electron microscopy (FESEM) tests were applied for investigating the morphology, topography and uniformity of the functionalized MeGO and MeGO/PANI nanocomposite. Figure 1a depicts the TEM image demonstrating a very thin layer of MeGO. The MeGO synthesized in this research was more transparent and uniform in comparison with previous works [63]. Based on previous results, the graphene nanosheets with excellent transparency had flake-like shapes and wrinkles and were more stable upon the exposure to the electron beam.

The morphology and uniformity of the amended electrodes: (a) TEM and (b) FESEM images of the MeGO and pellet/flake-like MeGO/PANI, respectively.
Figure 1b shows the microstructure of MeGO/PANI sample by the FESEM analysis. A porous structure was observed after electropolymerization of PANI on the MeGO surface. The forming of the pellet/flake-like microstructure and variations in the topography and morphology of the MeGO substrate corroborated the formation of PANI on the surface (Figure 1b). Clearly, the black regions and transparent edges were ascribed to PANI and MeGO nanosheets in MeGO/PANI nanocomposite, respectively. AA, an important factor for the synthesis and maintenance of collagen in tissue regeneration [64], was tested on our biosensor to assess its performance. CVs of the electrode modified with MeGO/PANI nanocomposites were conducted in the absence and the presence of AA (Figure 2). The results showed the highest catalytic effect for the AA solution.

CVs of (a) MeGO/PANI in 0.02 M PBS without AA and (b) with 10 mM AA at the scan rate of 100 mV s−1.
To obtain the reaction mechanism of AA with the electrode surface, the changes in the oxidation peak of AA in the nanocomposite electrode were examined at different scan rates. The increase of scan rates from 10 to 700 mV s−1 slightly changed the oxidation peak potentials (Figure 3). AA oxidation peak current versus scan rate ½ with higher regression coefficient is linear. This indicates that the reaction mechanisms of AA with the electrode surface follow the diffusion mechanism. Moreover, the peak potential shifts to more positive potential with the increasing scan rate, which is another sign for the diffusion mechanism of AA on the electrode surface. Oxidation peak potential of AA catalysis was selected for chronoamperometry techniques to obtain the linear range of the sensor.

The plots of (a) scan rate and (b) peak current versus scan rate ½.
Successive aliquots of increasing concentrations of AA were tested on the sensor to obtain amperometric responses of the nanocomposite-modified electrodes. The electrode shows amperometric responses proportional to the AA concentration. The MeGO/PANI electrode demonstrates higher current (less uniform response) along with higher noise compared to MeGO electrode at the same concentrations of AA. This can be attributed to the active edges of graphene, which result in better interactions with AA. The nanocomposite electrode presents greater stability than MeGO electrode.
Figure 4a depicts the current increase in AA level from 8 to 5,000 μM in 0.02 M PBS (pH = 7.4). A linear trend is observed between the peak current and the AA level in Figure 4b (with a correlation of R 2 = 0.99). The detection limit of the amperometric responses was evaluated to be 2 µM (S/N = 5). Therefore, by addition of the AA aliquot (dropwise) to the PBS buffer, the current response (output) of the nanocomposite-based biosensor dramatically promotes to the AA redox reaction linearly with analyte biosensing enviable range. As given in Table 1, the electroanalytic and sensing features of the functionalized MeGO/PANI nanocomposite are meaningfully more than the AA biosensors from the previous reports. Some samples have low detection limit, while others show wide linear sensing range. In comparison with other studies, our sensing device shows very low detection limit and wide linear range. Therefore, this strategy for developing an analytical device could be established as a promising protocol to promote the sensing performance.

Calibration curve and amperometric responses (linear range) of the MeGO/PANI-functionalized biosensor for determining AA and investigating the surface redox reaction. Applied potential was +0.8 V.
The comparison of the linear range and detection limit of the present study with others
| Electrode materials | Detection limit (µM) | Linear range (µM) | Ref. |
|---|---|---|---|
| PANI/PSS/Gr | 5 | 100–1,000 | [65] |
| NG | 2.2 | 5–1,300 | [66] |
| CoPc–MWCNTs | 1 | 10–2,600 | [67] |
| AGCE/ASOD | 2 | 5–400 | [68] |
| PdNi/C | 0.5 | 10–1,800 | [69] |
| MWCNT/CCE | 7.71 | 15–800 | [70] |
| Pt-Au hybrid | 103 | 103–165 | [71] |
| Chitosan-graphene | 50 | 50–1,200 | [72] |
| OMC/Nafion | 20 | 40–800 | [73] |
| ZnO/RM | 1.4 | 15–240 | [74] |
| MBMOR/P | 12.1 | 20–800 | [75] |
| Pd/CNFs | 15 | 50–4,000 | [76] |
| PMPy/Pd | 1,000 | 50–1,000 | [77] |
| DB71 | 1 | 1–2,000 | [78] |
| BPPF6/CPE | 8 | 10–3,000 | [79] |
| PPF/GNS | 120 | 400–6,000 | [80] |
| PdNPs-GO | — | 20–2,280 | [81] |
| Pt/Au/GCE | — | 24–384 | [71] |
| NFG/AgNPs (1, 90 s)/PANI | 8 | 10–5,460 | [52] |
| NFG/AgNPs (10, 90 s)/PANI | 50 | 50–11,460 | [52] |
| MeGO/PANI | 2 | 8–5,000 | Present work |
The selectivity of the MeGO/PANI nanocomposite was evaluated in the presence of some interferences. The current responses of the interfering species were also analyzed at the modified electrode. The selectivity of the sensor was tested in PBS 0.02 M (pH = 7.4) with 10 mM interferences and 5 mM AA. As shown in Figure 5, a significant current response was observed for AA redox reaction, while interferences could not influence the current responses. In spite of the high concentrations of interferences, negligible changes were sensed in the sensing outputs, demonstrating the excellent selectivity of the present platform upon AA determination.

The selectivity of MeGO/PANI sensor in the existence of 10 mM of uric acid and glucose and 5 mM of the analyte in 0.02 M PBS. The applied potential was 0.8 V (versus Ag/AgCl).
4 Conclusions
The functionalized MeGO/PANI nanocomposite demonstrated an excellent sensing activity over AA redox reaction. The linear sensing range and the detection limit of the sensing platform were dramatically more than most cases. Electroanalytical and biosensing results illustrated that the combination of MeGO as a 2D nanostructure and PANI as a familiar conducting polymer played a significant role in bioelectrochemical sensing applications. AA was scrutinized as a bioanalyte for verifying the declaration. The time-dependent amperometric output of the MeGO/PANI nanocomposite was noteworthy in an extensive linear range. It is concluded that the present sensor is a talented candidate for quick and careful sensing of AA.
Acknowledgments
This work was supported by the Basic Science Research Program through the National Research Foundation of Korea (NRF) funded by the Ministry of Education, Science and Technology (project number: 2020R1A2B5B02002203).
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Conflict of interest: The authors declare no conflict of interest regarding the publication of this paper.
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© 2020 Seyed Morteza Naghib et al., published by De Gruyter
This work is licensed under the Creative Commons Attribution 4.0 International License.
Articles in the same Issue
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- Generalized locally-exact homogenization theory for evaluation of electric conductivity and resistance of multiphase materials
- Enhancing ultra-early strength of sulphoaluminate cement-based materials by incorporating graphene oxide
- Characterization of mechanical properties of epoxy/nanohybrid composites by nanoindentation
- Graphene and CNT impact on heat transfer response of nanocomposite cylinders
- A facile and simple approach to synthesis and characterization of methacrylated graphene oxide nanostructured polyaniline nanocomposites
- Ultrasmall Fe3O4 nanoparticles induce S-phase arrest and inhibit cancer cells proliferation
- Effect of aging on properties and nanoscale precipitates of Cu-Ag-Cr alloy
- Effect of nano-strengthening on the properties and microstructure of recycled concrete
- Stabilizing effect of methylcellulose on the dispersion of multi-walled carbon nanotubes in cementitious composites
- Preparation and electromagnetic properties characterization of reduced graphene oxide/strontium hexaferrite nanocomposites
- Interfacial characteristics of a carbon nanotube-polyimide nanocomposite by molecular dynamics simulation
- Preparation and properties of 3D interconnected CNTs/Cu composites
- On factors affecting surface free energy of carbon black for reinforcing rubber
- Nano-silica modified phenolic resin film: manufacturing and properties
- Experimental study on photocatalytic degradation efficiency of mixed crystal nano-TiO2 concrete
- Halloysite nanotubes in polymer science: purification, characterization, modification and applications
- Cellulose hydrogel skeleton by extrusion 3D printing of solution
- Crack closure and flexural tensile capacity with SMA fibers randomly embedded on tensile side of mortar beams
- An experimental study on one-step and two-step foaming of natural rubber/silica nanocomposites
- Utilization of red mud for producing a high strength binder by composition optimization and nano strengthening
- One-pot synthesis of nano titanium dioxide in supercritical water
- Printability of photo-sensitive nanocomposites using two-photon polymerization
- In situ synthesis of expanded graphite embedded with amorphous carbon-coated aluminum particles as anode materials for lithium-ion batteries
- Effect of nano and micro conductive materials on conductive properties of carbon fiber reinforced concrete
- Tribological performance of nano-diamond composites-dispersed lubricants on commercial cylinder liner mating with CrN piston ring
- Supramolecular ionic polymer/carbon nanotube composite hydrogels with enhanced electromechanical performance
- Genetic mechanisms of deep-water massive sandstones in continental lake basins and their significance in micro–nano reservoir storage systems: A case study of the Yanchang formation in the Ordos Basin
- Effects of nanoparticles on engineering performance of cementitious composites reinforced with PVA fibers
- Band gap manipulation of viscoelastic functionally graded phononic crystal
- Pyrolysis kinetics and mechanical properties of poly(lactic acid)/bamboo particle biocomposites: Effect of particle size distribution
- Manipulating conductive network formation via 3D T-ZnO: A facile approach for a CNT-reinforced nanocomposite
- Microstructure and mechanical properties of WC–Ni multiphase ceramic materials with NiCl2·6H2O as a binder
- Effect of ball milling process on the photocatalytic performance of CdS/TiO2 composite
- Berberine/Ag nanoparticle embedded biomimetic calcium phosphate scaffolds for enhancing antibacterial function
- Effect of annealing heat treatment on microstructure and mechanical properties of nonequiatomic CoCrFeNiMo medium-entropy alloys prepared by hot isostatic pressing
- Corrosion behaviour of multilayer CrN coatings deposited by hybrid HIPIMS after oxidation treatment
- Surface hydrophobicity and oleophilicity of hierarchical metal structures fabricated using ink-based selective laser melting of micro/nanoparticles
- Research on bond–slip performance between pultruded glass fiber-reinforced polymer tube and nano-CaCO3 concrete
- Antibacterial polymer nanofiber-coated and high elastin protein-expressing BMSCs incorporated polypropylene mesh for accelerating healing of female pelvic floor dysfunction
- Effects of Ag contents on the microstructure and SERS performance of self-grown Ag nanoparticles/Mo–Ag alloy films
- A highly sensitive biosensor based on methacrylated graphene oxide-grafted polyaniline for ascorbic acid determination
- Arrangement structure of carbon nanofiber with excellent spectral radiation characteristics
- Effect of different particle sizes of nano-SiO2 on the properties and microstructure of cement paste
- Superior Fe x N electrocatalyst derived from 1,1′-diacetylferrocene for oxygen reduction reaction in alkaline and acidic media
- Facile growth of aluminum oxide thin film by chemical liquid deposition and its application in devices
- Liquid crystallinity and thermal properties of polyhedral oligomeric silsesquioxane/side-chain azobenzene hybrid copolymer
- Laboratory experiment on the nano-TiO2 photocatalytic degradation effect of road surface oil pollution
- Binary carbon-based additives in LiFePO4 cathode with favorable lithium storage
- Conversion of sub-µm calcium carbonate (calcite) particles to hollow hydroxyapatite agglomerates in K2HPO4 solutions
- Exact solutions of bending deflection for single-walled BNNTs based on the classical Euler–Bernoulli beam theory
- Effects of substrate properties and sputtering methods on self-formation of Ag particles on the Ag–Mo(Zr) alloy films
- Enhancing carbonation and chloride resistance of autoclaved concrete by incorporating nano-CaCO3
- Effect of SiO2 aerogels loading on photocatalytic degradation of nitrobenzene using composites with tetrapod-like ZnO
- Radiation-modified wool for adsorption of redox metals and potentially for nanoparticles
- Hydration activity, crystal structural, and electronic properties studies of Ba-doped dicalcium silicate
- Microstructure and mechanical properties of brazing joint of silver-based composite filler metal
- Polymer nanocomposite sunlight spectrum down-converters made by open-air PLD
- Cryogenic milling and formation of nanostructured machined surface of AISI 4340
- Braided composite stent for peripheral vascular applications
- Effect of cinnamon essential oil on morphological, flammability and thermal properties of nanocellulose fibre–reinforced starch biopolymer composites
- Study on influencing factors of photocatalytic performance of CdS/TiO2 nanocomposite concrete
- Improving flexural and dielectric properties of carbon fiber epoxy composite laminates reinforced with carbon nanotubes interlayer using electrospray deposition
- Scalable fabrication of carbon materials based silicon rubber for highly stretchable e-textile sensor
- Degradation modeling of poly-l-lactide acid (PLLA) bioresorbable vascular scaffold within a coronary artery
- Combining Zn0.76Co0.24S with S-doped graphene as high-performance anode materials for lithium- and sodium-ion batteries
- Synthesis of functionalized carbon nanotubes for fluorescent biosensors
- Effect of nano-silica slurry on engineering, X-ray, and γ-ray attenuation characteristics of steel slag high-strength heavyweight concrete
- Incorporation of redox-active polyimide binder into LiFePO4 cathode for high-rate electrochemical energy storage
- Microstructural evolution and properties of Cu–20 wt% Ag alloy wire by multi-pass continuous drawing
- Transparent ultraviolet-shielding composite films made from dispersing pristine zinc oxide nanoparticles in low-density polyethylene
- Microfluidic-assisted synthesis and modelling of monodispersed magnetic nanocomposites for biomedical applications
- Preparation and piezoresistivity of carbon nanotube-coated sand reinforced cement mortar
- Vibrational analysis of an irregular single-walled carbon nanotube incorporating initial stress effects
- Study of the material engineering properties of high-density poly(ethylene)/perlite nanocomposite materials
- Single pulse laser removal of indium tin oxide film on glass and polyethylene terephthalate by nanosecond and femtosecond laser
- Mechanical reinforcement with enhanced electrical and heat conduction of epoxy resin by polyaniline and graphene nanoplatelets
- High-efficiency method for recycling lithium from spent LiFePO4 cathode
- Degradable tough chitosan dressing for skin wound recovery
- Static and dynamic analyses of auxetic hybrid FRC/CNTRC laminated plates
- Review articles
- Carbon nanomaterials enhanced cement-based composites: advances and challenges
- Review on the research progress of cement-based and geopolymer materials modified by graphene and graphene oxide
- Review on modeling and application of chemical mechanical polishing
- Research on the interface properties and strengthening–toughening mechanism of nanocarbon-toughened ceramic matrix composites
- Advances in modelling and analysis of nano structures: a review
- Mechanical properties of nanomaterials: A review
- New generation of oxide-based nanoparticles for the applications in early cancer detection and diagnostics
- A review on the properties, reinforcing effects, and commercialization of nanomaterials for cement-based materials
- Recent development and applications of nanomaterials for cancer immunotherapy
- Advances in biomaterials for adipose tissue reconstruction in plastic surgery
- Advances of graphene- and graphene oxide-modified cementitious materials
- Theories for triboelectric nanogenerators: A comprehensive review
- Nanotechnology of diamondoids for the fabrication of nanostructured systems
- Material advancement in technological development for the 5G wireless communications
- Nanoengineering in biomedicine: Current development and future perspectives
- Recent advances in ocean wave energy harvesting by triboelectric nanogenerator: An overview
- Application of nanoscale zero-valent iron in hexavalent chromium-contaminated soil: A review
- Carbon nanotube–reinforced polymer composite for electromagnetic interference application: A review
- Functionalized layered double hydroxide applied to heavy metal ions absorption: A review
- A new classification method of nanotechnology for design integration in biomaterials
- Finite element analysis of natural fibers composites: A review
- Phase change materials for building construction: An overview of nano-/micro-encapsulation
- Recent advance in surface modification for regulating cell adhesion and behaviors
- Hyaluronic acid as a bioactive component for bone tissue regeneration: Fabrication, modification, properties, and biological functions
- Theoretical calculation of a TiO2-based photocatalyst in the field of water splitting: A review
- Two-photon polymerization nanolithography technology for fabrication of stimulus-responsive micro/nano-structures for biomedical applications
- A review of passive methods in microchannel heat sink application through advanced geometric structure and nanofluids: Current advancements and challenges
- Stress effect on 3D culturing of MC3T3-E1 cells on microporous bovine bone slices
- Progress in magnetic Fe3O4 nanomaterials in magnetic resonance imaging
- Synthesis of graphene: Potential carbon precursors and approaches
- A comprehensive review of the influences of nanoparticles as a fuel additive in an internal combustion engine (ICE)
- Advances in layered double hydroxide-based ternary nanocomposites for photocatalysis of contaminants in water
- Analysis of functionally graded carbon nanotube-reinforced composite structures: A review
- Application of nanomaterials in ultra-high performance concrete: A review
- Therapeutic strategies and potential implications of silver nanoparticles in the management of skin cancer
- Advanced nickel nanoparticles technology: From synthesis to applications
- Cobalt magnetic nanoparticles as theranostics: Conceivable or forgettable?
- Progress in construction of bio-inspired physico-antimicrobial surfaces
- From materials to devices using fused deposition modeling: A state-of-art review
- A review for modified Li composite anode: Principle, preparation and challenge
- Naturally or artificially constructed nanocellulose architectures for epoxy composites: A review
Articles in the same Issue
- Research Articles
- Generalized locally-exact homogenization theory for evaluation of electric conductivity and resistance of multiphase materials
- Enhancing ultra-early strength of sulphoaluminate cement-based materials by incorporating graphene oxide
- Characterization of mechanical properties of epoxy/nanohybrid composites by nanoindentation
- Graphene and CNT impact on heat transfer response of nanocomposite cylinders
- A facile and simple approach to synthesis and characterization of methacrylated graphene oxide nanostructured polyaniline nanocomposites
- Ultrasmall Fe3O4 nanoparticles induce S-phase arrest and inhibit cancer cells proliferation
- Effect of aging on properties and nanoscale precipitates of Cu-Ag-Cr alloy
- Effect of nano-strengthening on the properties and microstructure of recycled concrete
- Stabilizing effect of methylcellulose on the dispersion of multi-walled carbon nanotubes in cementitious composites
- Preparation and electromagnetic properties characterization of reduced graphene oxide/strontium hexaferrite nanocomposites
- Interfacial characteristics of a carbon nanotube-polyimide nanocomposite by molecular dynamics simulation
- Preparation and properties of 3D interconnected CNTs/Cu composites
- On factors affecting surface free energy of carbon black for reinforcing rubber
- Nano-silica modified phenolic resin film: manufacturing and properties
- Experimental study on photocatalytic degradation efficiency of mixed crystal nano-TiO2 concrete
- Halloysite nanotubes in polymer science: purification, characterization, modification and applications
- Cellulose hydrogel skeleton by extrusion 3D printing of solution
- Crack closure and flexural tensile capacity with SMA fibers randomly embedded on tensile side of mortar beams
- An experimental study on one-step and two-step foaming of natural rubber/silica nanocomposites
- Utilization of red mud for producing a high strength binder by composition optimization and nano strengthening
- One-pot synthesis of nano titanium dioxide in supercritical water
- Printability of photo-sensitive nanocomposites using two-photon polymerization
- In situ synthesis of expanded graphite embedded with amorphous carbon-coated aluminum particles as anode materials for lithium-ion batteries
- Effect of nano and micro conductive materials on conductive properties of carbon fiber reinforced concrete
- Tribological performance of nano-diamond composites-dispersed lubricants on commercial cylinder liner mating with CrN piston ring
- Supramolecular ionic polymer/carbon nanotube composite hydrogels with enhanced electromechanical performance
- Genetic mechanisms of deep-water massive sandstones in continental lake basins and their significance in micro–nano reservoir storage systems: A case study of the Yanchang formation in the Ordos Basin
- Effects of nanoparticles on engineering performance of cementitious composites reinforced with PVA fibers
- Band gap manipulation of viscoelastic functionally graded phononic crystal
- Pyrolysis kinetics and mechanical properties of poly(lactic acid)/bamboo particle biocomposites: Effect of particle size distribution
- Manipulating conductive network formation via 3D T-ZnO: A facile approach for a CNT-reinforced nanocomposite
- Microstructure and mechanical properties of WC–Ni multiphase ceramic materials with NiCl2·6H2O as a binder
- Effect of ball milling process on the photocatalytic performance of CdS/TiO2 composite
- Berberine/Ag nanoparticle embedded biomimetic calcium phosphate scaffolds for enhancing antibacterial function
- Effect of annealing heat treatment on microstructure and mechanical properties of nonequiatomic CoCrFeNiMo medium-entropy alloys prepared by hot isostatic pressing
- Corrosion behaviour of multilayer CrN coatings deposited by hybrid HIPIMS after oxidation treatment
- Surface hydrophobicity and oleophilicity of hierarchical metal structures fabricated using ink-based selective laser melting of micro/nanoparticles
- Research on bond–slip performance between pultruded glass fiber-reinforced polymer tube and nano-CaCO3 concrete
- Antibacterial polymer nanofiber-coated and high elastin protein-expressing BMSCs incorporated polypropylene mesh for accelerating healing of female pelvic floor dysfunction
- Effects of Ag contents on the microstructure and SERS performance of self-grown Ag nanoparticles/Mo–Ag alloy films
- A highly sensitive biosensor based on methacrylated graphene oxide-grafted polyaniline for ascorbic acid determination
- Arrangement structure of carbon nanofiber with excellent spectral radiation characteristics
- Effect of different particle sizes of nano-SiO2 on the properties and microstructure of cement paste
- Superior Fe x N electrocatalyst derived from 1,1′-diacetylferrocene for oxygen reduction reaction in alkaline and acidic media
- Facile growth of aluminum oxide thin film by chemical liquid deposition and its application in devices
- Liquid crystallinity and thermal properties of polyhedral oligomeric silsesquioxane/side-chain azobenzene hybrid copolymer
- Laboratory experiment on the nano-TiO2 photocatalytic degradation effect of road surface oil pollution
- Binary carbon-based additives in LiFePO4 cathode with favorable lithium storage
- Conversion of sub-µm calcium carbonate (calcite) particles to hollow hydroxyapatite agglomerates in K2HPO4 solutions
- Exact solutions of bending deflection for single-walled BNNTs based on the classical Euler–Bernoulli beam theory
- Effects of substrate properties and sputtering methods on self-formation of Ag particles on the Ag–Mo(Zr) alloy films
- Enhancing carbonation and chloride resistance of autoclaved concrete by incorporating nano-CaCO3
- Effect of SiO2 aerogels loading on photocatalytic degradation of nitrobenzene using composites with tetrapod-like ZnO
- Radiation-modified wool for adsorption of redox metals and potentially for nanoparticles
- Hydration activity, crystal structural, and electronic properties studies of Ba-doped dicalcium silicate
- Microstructure and mechanical properties of brazing joint of silver-based composite filler metal
- Polymer nanocomposite sunlight spectrum down-converters made by open-air PLD
- Cryogenic milling and formation of nanostructured machined surface of AISI 4340
- Braided composite stent for peripheral vascular applications
- Effect of cinnamon essential oil on morphological, flammability and thermal properties of nanocellulose fibre–reinforced starch biopolymer composites
- Study on influencing factors of photocatalytic performance of CdS/TiO2 nanocomposite concrete
- Improving flexural and dielectric properties of carbon fiber epoxy composite laminates reinforced with carbon nanotubes interlayer using electrospray deposition
- Scalable fabrication of carbon materials based silicon rubber for highly stretchable e-textile sensor
- Degradation modeling of poly-l-lactide acid (PLLA) bioresorbable vascular scaffold within a coronary artery
- Combining Zn0.76Co0.24S with S-doped graphene as high-performance anode materials for lithium- and sodium-ion batteries
- Synthesis of functionalized carbon nanotubes for fluorescent biosensors
- Effect of nano-silica slurry on engineering, X-ray, and γ-ray attenuation characteristics of steel slag high-strength heavyweight concrete
- Incorporation of redox-active polyimide binder into LiFePO4 cathode for high-rate electrochemical energy storage
- Microstructural evolution and properties of Cu–20 wt% Ag alloy wire by multi-pass continuous drawing
- Transparent ultraviolet-shielding composite films made from dispersing pristine zinc oxide nanoparticles in low-density polyethylene
- Microfluidic-assisted synthesis and modelling of monodispersed magnetic nanocomposites for biomedical applications
- Preparation and piezoresistivity of carbon nanotube-coated sand reinforced cement mortar
- Vibrational analysis of an irregular single-walled carbon nanotube incorporating initial stress effects
- Study of the material engineering properties of high-density poly(ethylene)/perlite nanocomposite materials
- Single pulse laser removal of indium tin oxide film on glass and polyethylene terephthalate by nanosecond and femtosecond laser
- Mechanical reinforcement with enhanced electrical and heat conduction of epoxy resin by polyaniline and graphene nanoplatelets
- High-efficiency method for recycling lithium from spent LiFePO4 cathode
- Degradable tough chitosan dressing for skin wound recovery
- Static and dynamic analyses of auxetic hybrid FRC/CNTRC laminated plates
- Review articles
- Carbon nanomaterials enhanced cement-based composites: advances and challenges
- Review on the research progress of cement-based and geopolymer materials modified by graphene and graphene oxide
- Review on modeling and application of chemical mechanical polishing
- Research on the interface properties and strengthening–toughening mechanism of nanocarbon-toughened ceramic matrix composites
- Advances in modelling and analysis of nano structures: a review
- Mechanical properties of nanomaterials: A review
- New generation of oxide-based nanoparticles for the applications in early cancer detection and diagnostics
- A review on the properties, reinforcing effects, and commercialization of nanomaterials for cement-based materials
- Recent development and applications of nanomaterials for cancer immunotherapy
- Advances in biomaterials for adipose tissue reconstruction in plastic surgery
- Advances of graphene- and graphene oxide-modified cementitious materials
- Theories for triboelectric nanogenerators: A comprehensive review
- Nanotechnology of diamondoids for the fabrication of nanostructured systems
- Material advancement in technological development for the 5G wireless communications
- Nanoengineering in biomedicine: Current development and future perspectives
- Recent advances in ocean wave energy harvesting by triboelectric nanogenerator: An overview
- Application of nanoscale zero-valent iron in hexavalent chromium-contaminated soil: A review
- Carbon nanotube–reinforced polymer composite for electromagnetic interference application: A review
- Functionalized layered double hydroxide applied to heavy metal ions absorption: A review
- A new classification method of nanotechnology for design integration in biomaterials
- Finite element analysis of natural fibers composites: A review
- Phase change materials for building construction: An overview of nano-/micro-encapsulation
- Recent advance in surface modification for regulating cell adhesion and behaviors
- Hyaluronic acid as a bioactive component for bone tissue regeneration: Fabrication, modification, properties, and biological functions
- Theoretical calculation of a TiO2-based photocatalyst in the field of water splitting: A review
- Two-photon polymerization nanolithography technology for fabrication of stimulus-responsive micro/nano-structures for biomedical applications
- A review of passive methods in microchannel heat sink application through advanced geometric structure and nanofluids: Current advancements and challenges
- Stress effect on 3D culturing of MC3T3-E1 cells on microporous bovine bone slices
- Progress in magnetic Fe3O4 nanomaterials in magnetic resonance imaging
- Synthesis of graphene: Potential carbon precursors and approaches
- A comprehensive review of the influences of nanoparticles as a fuel additive in an internal combustion engine (ICE)
- Advances in layered double hydroxide-based ternary nanocomposites for photocatalysis of contaminants in water
- Analysis of functionally graded carbon nanotube-reinforced composite structures: A review
- Application of nanomaterials in ultra-high performance concrete: A review
- Therapeutic strategies and potential implications of silver nanoparticles in the management of skin cancer
- Advanced nickel nanoparticles technology: From synthesis to applications
- Cobalt magnetic nanoparticles as theranostics: Conceivable or forgettable?
- Progress in construction of bio-inspired physico-antimicrobial surfaces
- From materials to devices using fused deposition modeling: A state-of-art review
- A review for modified Li composite anode: Principle, preparation and challenge
- Naturally or artificially constructed nanocellulose architectures for epoxy composites: A review