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1.
Maleic anhydride was reacted with the armchair edges of graphene nanosheets (GN) via Diels–Alder reaction. Then, polyethylene glycol (PEG) was grafted onto the GN in the presence of anhydride groups through an esterification reaction. The PEG-grafted GN (PEG-g-GN) was characterised via FTIR analysis, thermogravimetric analysis, scanning electron microscopy, Raman spectroscopy and contact angle measurements, proving that PEG was successfully grafted onto the GN surface. The results indicated that PEG-g-GN possessed high electrical conductivity and was dispersed in polylactic acid (PLA). The composites were fabricated by using PEG-g-GN and GN as the conductive agent in the PLA matrix. Owing to the function of PEG molecular chains, PEG-g-GN can be uniformly dispersed in the PLA matrix and improve the tensile strength of composites to 59.46 MPa and conductivity to 9.69 × 10−4 S cm−1 at a PEG-g-GN content of 1 wt%.PEG-grafted GN has been synthesized and the effects of modification on the PLA composite conductivity, mechanical properties are investigated. 相似文献
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Noor ul Ain Jamal Abdul Nasir Zaibunisa Khan Ian S. Butler Ziaur Rehman 《RSC advances》2022,12(12):7550
Over the past few years, considerable attention has been paid to biomedical applications of copper sulfide nanostructures owing to their enhanced physiochemical and pharmacokinetics characteristics in comparison to gold, silver, and carbon nanomaterials. The small-sized CuxSy nanoparticles have the advantage to absorb efficiently in the near-infrared region (NIR) above 700 nm and the absorption can be tuned by altering their stoichiometries. Moreover, their easy removal through the kidneys overpowers the issue of toxicity caused by many inorganic substances. The low cost and selectivity further add to the advantages of CuxSy nanostructures as electrode materials in comparison to relatively expensive materials such as silver and gold nanoparticles. This review is mainly focused on the synthesis and biomedical applications of CuxSy nanostructures. The first part summarizes the various synthetic routes used to produce CuxSy nanostructures with varying morphologies, while the second part targets the recent progress made in the application of small-sized CuxSy nanostructures as biosensors, and their analysis and uses in the cure of cancer. Photoacoustic imaging and other cancer treatment applications are discussed. Research on CuxSy nanostructures will continue to increase over the next few decades, and great opportunities lie ahead for potential biomedical applications of CuxSy nanostructures.Over the past few years, considerable attention has been paid to biomedical applications of copper sulfide nanostructures owing to their enhanced physiochemical and pharmacokinetics characteristics in comparison to gold, silver, and carbon nanomaterials. 相似文献
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Recent advancements in electrode design are substantially linked to state-of-the-art nanomaterial fabrications. Herein, we report a simple one-pot hydrothermal synthesis of Cd(OH)2 with a platelet-like morphology, which was subsequently annealed at relatively high temperatures to produce a CdO/Cd(OH)2 nanocomposite for the first time. It was found that the control of thermal treatment allowed tunable charge transport across the nanometre scale due to the presence of CdO and Cd(OH)2 mixed nanocrystals. The CdO/Cd(OH)2 nanocrystals offer interesting prospects for the electrocatalytic oxidation of nitrite ions and for supercapacitor applications. The CdO/Cd(OH)2 nanocomposite was blended with a trace amount of gold NPs for enhancing the electrochemical conductivity and electrocatalytic capability for nitrite oxidation with a sensitivity of 32.9 μA mM−1. It afforded a promising electrocatalyst in a wide concentration range up to 10 mM with a low detection limit of 0.87 μM. Furthermore, the CdO/Cd(OH)2 nanocomposite electrode was showed to be a highly active and stable supercapacitor, achieving a high specific capacitance in an alkaline medium of about 145 F g−1 at a discharge current of 2.0 A g−1. These results have revealed that the presence of mixed oxide/hydroxide nanocrystals in nanoscale dimensions will be very interesting for various electrochemical applications and provide for a new class of nanodevices based on electrochemistry with unique capabilities.A simple fabrication of CdO/Cd(OH)2 nanocomposites was developed and explored for electrochemical-based devices. The nanocomposite is shown to be a sensitive electrode material for nitrite determination in water samples as well as a promising supercapacitor. 相似文献
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Alain Tundidor-Camba Carmen M. Gonzlez-Henríquez Mauricio A. Sarabia-Vallejos Luis H. Tagle Ren A. Hauyn Patricio A. Sobarzo Alexis Gonzlez Pablo A. Ortiz Eva M. Maya Claudio A. Terraza 《RSC advances》2018,8(3):1296
In this study, four new silicon-containing poly(ether-azomethine)s with linear structures were prepared using original silicon and biphenyl moiety-containing monomers: two diamines and two dialdehydes. The oligomeric natures of the samples were established by GPC analysis, which showed chains containing 3 to 5 repetitive units. The monomers and the oligomeric samples were structurally characterized by NMR and FT-IR spectroscopy. The solubilities of the samples in common organic solvents and their thermal behavior enable improvement of their industrial and technological processability. The optical band gaps of the oligomeric samples were estimated from optical measurements (UV-vis), and their electrical behavior in films was determined using the four-point method. The surface arrangements and morphological characteristics of the films were determined via atomic force microscopy measurements. The roughness, area increase percentage and layer stiffness of the films were also measured using this technique.In this study, four new silicon-containing poly(ether-azomethine)s with linear structures were prepared using original silicon and biphenyl moiety-containing monomers: two diamines and two dialdehydes. 相似文献
5.
Sundus Azhar Khuram Shahzad Ahmad Isaac Abrahams Wang Lin Ram K. Gupta Muhammad Mazhar Daoud Ali 《RSC advances》2021,11(49):30510
A modified and sustainable approach is reported in this research for the synthesis of a spherical-shaped CuO–Bi2O3 electrode material for electrochemical studies. Aqueous extract derived from the plant Amaranthus viridis L. (Amaranthaceae) (AVL) was used as a reducing agent for morphological control of the synthesis of CuO–Bi2O3 nanocomposites. The modified nanomaterial revealed an average crystal size of 49 ± 2 nm, which matches very well with scanning electron microscopy (SEM) findings. Furthermore, the synthesized material was characterized using Fourier-transform infrared spectroscopy, field emission SEM and energy-dispersive spectroscopy. The optical band gap energy of 3.45 eV was calculated using a Tauc plot. Finally, the bioorganic framework-derived CuO–Bi2O3 electrode was tested for energy generating and storage applications and the results revealed a capacitance of 389 F g−1 by cyclic voltammetry, with a maximum energy density of 12 W h kg−1 and power density of 5 kW kg−1. Hydrogen evolution reaction and oxygen evolution reaction studies showed good potential of CuO–Bi2O3 as an electrocatalyst for water splitting, with maximum efficiency of the electrode up to 16.5 hours.Spherical-shaped CuO–Bi2O3 electrode material and its electrochemical studies. 相似文献
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The strong in-plane anisotropy and quasi-1D electronic structures of transition-metal trichalcogenides (MX3; M = group IV or V transition metal; X = S, Se, or Te) have pronounced influence on moulding the properties of MX3 materials. In particular, the infinite trigonal MX6 prismatic chains running parallel to the b-axis are responsible for the manifestation of anisotropy in these materials. Several marvellous properties, such as inherent electronic, optical, electrical, magnetic, superconductivity, and charge density wave (CDW) transport properties, make transition-metal trichalcogenides (TMTCs) stand out from other 2D materials in the fields of nanoscience and materials science. In addition, with the assistance of pressure, temperature, and tensile strain, these materials and their exceptional properties can be tuned to a superior extent. The robust anisotropy and incommensurable properties make the MX3 family fit for accomplishing quite a lot of compelling applications in the areas of field effect transistors (FETs), solar and fuel cells, lithium-ion batteries, thermoelectricity, etc. In this review article, a precise audit of the distinctive crystal structures, static and dynamic properties, efficacious synthesis schemes, and enthralling applications of quasi-1D MX3 materials is made.The strong in-plane anisotropy and quasi-1D electronic structures of transition-metal trichalcogenides (MX3; M = group IV or V transition metal; X = S, Se, or Te) have pronounced influence on moulding the properties of MX3 materials. 相似文献
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Yeni Wahyuni Hartati Seda Nur Topkaya Shabarni Gaffar Husein H. Bahti Arif E. Cetin 《RSC advances》2021,11(31):18737
Correction for ‘Synthesis and characterization of nanoceria for electrochemical sensing applications’ by Yeni Wahyuni Hartati et al., RSC Adv., 2021, 11, 16216–16235, DOI: 10.1039/D1RA00637A.The authors regret that the figures throughout the article were incorrectly referenced. The correct references for each figure are described in Figure Original reference Corrected reference Fig. 1 47 53 Fig. 2 51 (Missing) H. Jan, M. A. Khan, H. Usman, M. Shah, R. Ansir, S. Faisal, N. Ullah and L. Rahman, RSC Adv., 2020, 10, 19219–19231 Fig. 3 75 80 Fig. 4 76 81 Fig. 5 77 82 Fig. 6 42 48 Fig. 7 80 85 Fig. 8 29 29 Fig. 9 81 86 Fig. 10 88 93 Fig. 11 93 98 Fig. 12 107 112 Fig. 13 123 128