273 results match your criteria carbon nanoflakes

Phosphate recovery from aqueous solution through adsorption by magnesium modified multi-walled carbon nanotubes.

Sci Total Environ 2021 Jul 7;796:148907. Epub 2021 Jul 7.

Key Laboratory of Industrial Ecology and Environmental Engineering (Ministry of Education, China), School of Environmental Science and Technology, Dalian University of Technology, Dalian 116024, PR China. Electronic address:

In this study, multi-walled carbon nanotubes modified by magnesium ([email protected]) was prepared as a novel adsorbent to recover phosphate from wastewater. [email protected] with the mass ratio of 0.48 (Mg versus MWCNTs) was the most efficient for phosphate adsorption and the maximum experimental adsorption capacity was up to 198 mg P/g. Read More

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Poly (red DSBR)/Al-ZnO modified carbon paste electrode sensor for dopamine: a voltammetric study.

Sci Rep 2021 Jul 12;11(1):14310. Epub 2021 Jul 12.

Department of Chemical Engineering, Indian Institute of Technology Guwahati, Guwahati, 781039, India.

In the present work, the ZnO and Al-ZnO nanoflakes (NFs) were synthesized by the co-precipitation process. The synthesized NFs were characterized by X-ray diffraction and field emission scanning electron microscopy. Energy dispersive X-ray spectrometer was explored for the elemental chemical compositions. Read More

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Enzymatic photoelectrochemical bioassay based on hierarchical CdS/NiO heterojunction for glucose determination.

Mikrochim Acta 2021 Jul 6;188(8):243. Epub 2021 Jul 6.

School of Chemistry and Chemical Engineering, Yancheng Institute of Technology, Yancheng, 224051, China.

The design and development of a 3D hierarchical CdS/NiO heterojunction and its application in a self-powered cathodic photoelectrochemical (PEC) bioanalysis is introduced. Specifically, NiO nanoflakes (NFs) were in situ formed on carbon fibers via a facile liquid-phase deposition method followed by an annealing step and subsequent integration with CdS quantum dots (QDs). The glucose oxidase (GOx) was then coated on the photocathode to allow the determination of glucose. Read More

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Carbon Nanotube Fibers Decorated with MnO for Wire-Shaped Supercapacitor.

Molecules 2021 Jun 7;26(11). Epub 2021 Jun 7.

Department of Materials Engineering, KU Leuven, Kasteelpark Arenberg 44-bus 2450, B-3001 Leuven, Belgium.

Fibers made from CNTs (CNT fibers) have the potential to form high-strength, lightweight materials with superior electrical conductivity. CNT fibers have attracted great attention in relation to various applications, in particular as conductive electrodes in energy applications, such as capacitors, lithium-ion batteries, and solar cells. Among these, wire-shaped supercapacitors demonstrate various advantages for use in lightweight and wearable electronics. Read More

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0D, 1D, 2D molybdenum disulfide functionalized by 2D polymeric carbon nitride for photocatalytic water splitting.

Nanotechnology 2021 Jun 9;32(35). Epub 2021 Jun 9.

Nanomaterials Physicochemistry Department, Faculty of Chemical Technology and Engineering, West Pomeranian University of Technology, Szczecin, Piastow Ave. 42, 71-065 Szczecin, Poland.

Photocatalytic activity of molybdenum disulfide structures with different dimensions (0D, 1D and 2D) functionalized with polymeric carbon nitride (PCN) is presented. MoSnanotubes (1D), nanoflakes (2D) and quantum dots (0D, QDs) were used, respectively, as co-catalysts of PCN in photocatalytic water splitting reaction to evolve hydrogen. Although, 2D-PCN showed the highest light absorption in visible range and the most enhanced photocurrent response after irradiation with light from 460 to 727 nm, QDs-PCN showed the highest photocatalytic efficiency. Read More

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Mechanistic Insights into the Selective Electroreduction of Crotonaldehyde to Crotyl Alcohol and 1-Butanol.

ChemSusChem 2021 Jul 14;14(14):2963-2971. Epub 2021 Jun 14.

Department of Chemistry, National University of Singapore, 3 Science Drive 3, Singapore, 117543, Singapore.

The electroreduction of crotonaldehyde, which can be derived from the aldol condensation of acetaldehyde (sustainably produced from CO reduction or from biomass ethanol), is potentially a carbon-neutral route for generating high-value C chemicals such as crotyl alcohol and 1-butanol. Developing functional catalysts is necessary toward this end. Herein, the electrocatalytic conversion of crotonaldehyde to crotyl alcohol and 1-butanol was achieved in 0. Read More

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Activated Carbon Blended with Reduced Graphene Oxide Nanoflakes for Capacitive Deionization.

Nanomaterials (Basel) 2021 Apr 23;11(5). Epub 2021 Apr 23.

Institut Européen des membranes, IEM, UMR-5635, Université de Montpellier, ENSCM, CNRS, Place Eugène Bataillon, CEDEX 5, 34095 Montpellier, France.

Capacitive deionization is a second-generation water desalination technology in which porous electrodes (activated carbon materials) are used to temporarily store ions. In this technology, porous carbon used as electrodes have inherent limitations, such as low electrical conductivity, low capacitance, etc., and, as such, optimization of electrode materials by rational design to obtain hybrid electrodes is key towards improvement in desalination performance. Read More

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Novel 2D allotropic forms and nanoflakes of silicon, phosphorus, and germanium: a computational study.

J Mol Model 2021 Apr 28;27(5):142. Epub 2021 Apr 28.

Instituto de Investigaciones en Materiales, Universidad Nacional Autónoma de México, Apartado Postal 70-360, CU, Coyoacán, 04510, Mexico, DF, Mexico.

The structural variability offered by 2D materials is an essential feature in materials design. Despite its significance, obtaining assemblies with suitable stability remains a challenge. In this work, we theoretically explore novel silicon, phosphorus, and germanium, analogues of haeckelites at hybrid DFT level. Read More

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One-Step Plasma Synthesis of Nitrogen-Doped Carbon Nanomesh.

Nanomaterials (Basel) 2021 Mar 25;11(4). Epub 2021 Mar 25.

Department of Surface Engineering, Jozef Stefan Institute, Jamova Cesta 39, 1000 Ljubljana, Slovenia.

A one-step method for plasma synthesis of nitrogen-doped carbon nanomesh is presented. The method involves a molten polymer, which is a source of carbon, and inductively coupled nitrogen plasma, which is a source of highly reactive nitrogen species. The method enables the deposition of the nanocarbon layer at a rate of almost 0. Read More

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Molecular Design of a Reversible Hydrogen Storage Device Composed of the Graphene Nanoflake-Magnesium-H System.

ACS Omega 2021 Mar 10;6(11):7778-7785. Epub 2021 Mar 10.

Division of Applied Chemistry, Faculty of Engineering, Hokkaido University, Sapporo 060-8628, Japan.

Carbon materials such as graphene nanoflakes (GRs), carbon nanotubes, and fullerene can be widely used for hydrogen storage. In general, metal doping of these materials leads to an increase in their H storage density. In the present study, the binding energies of H to Mg species on GRs, GR-Mg ( = 0-2), were calculated using density functional theory calculations. Read More

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Micro/Nano NaV(PO)/N-Doped Carbon Composites with a Hierarchical Porous Structure for High-Rate Pouch-Type Sodium-Ion Full-Cell Performance.

ACS Appl Mater Interfaces 2021 Feb 9;13(7):8445-8454. Epub 2021 Feb 9.

Department of Materials Science and Engineering, College of Engineering, Peking University, Beijing 100871, China.

Polyanion-type NaV(PO) (NVP) is an overwhelmingly attractive cathode material for sodium-ion batteries (SIBs) because of its high structural stability and fast Na mobility. However, its practical application is strongly plagued by either nanoscale particle size or poor rate performance. Herein, a micro/nanocomposite NVP cathode with a hierarchical porous structure is proposed to solve the problem. Read More

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February 2021

Heptagons in the Basal Plane of Graphene Nanoflakes Analyzed by Simulated X-ray Photoelectron Spectroscopy.

ACS Omega 2021 Jan 13;6(3):2389-2395. Epub 2021 Jan 13.

Graduate School of Engineering, Chiba University, 1-33 Yayoi, Inage, Chiba 263-8522, Japan.

The performance of graphene-based electronic devices depends critically on the existence of topological defects such as heptagons. Identifying heptagons at the atomic scale is important to completely understand the electronic properties of these materials. In this study, we report an atomic-scale analysis of graphene nanoflakes with two to eight isolated or connected heptagons, using simulated C 1s X-ray photoelectron spectroscopy (XPS) to estimate the XPS profiles depending on the density and the position of the heptagons. Read More

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January 2021

Insights into graphene oxide interaction with human serum albumin in isolated state and in blood plasma.

Int J Biol Macromol 2021 Apr 27;175:19-29. Epub 2021 Jan 27.

Institute of Biophysics, Biological Research Centre, H-6726 Szeged, Hungary.

The interactions of graphene oxide (GO), a 2-dimensional nanomaterial with hydrophilic edges, hydrophobic basal plane and large flat surfaces, with biological macromolecules, are of key importance for the development of novel nanomaterials for biomedical applications. To gain more insight into the interaction of GO flakes with human serum albumin (HSA), we examined GO binding to HSA in its isolated state and in blood plasma. Calorimetric data reveal that GO strongly stabilizes free isolated HSA against a thermal challenge at low ionic strength, indicating strong binding interactions, confirmed by the drop in ζ-potential of the HSA/GO assemblies compared to bare GO flakes. Read More

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3D NiO nanoflakes/carbon fiber meshwork: Facile preparation and utilization as general platform for photocathodic bioanalysis.

Anal Chim Acta 2021 Jan 1;1143:173-180. Epub 2020 Dec 1.

State Key Laboratory of Analytical Chemistry for Life Science, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing, 210023, China. Electronic address:

Herein, we describe a customized approach for facile preparation of three-dimensional (3D) NiO nanoflakes (NFs)/carbon fiber meshwork (CFM) and its validation as a common photocathode matrix for photoelectrochemical (PEC) bioanalysis, which to our knowledge has not been reported. Specifically, 3D NiO NFs/CFM was fabricated by a sequential liquid phase deposition and annealing process, which was then characterized by scanning electron microscopy, X-ray photoelectron spectrum, UV-vis absorption spectra and N adsorption-desorption measurement. Sensitized by BiOI and incorporated with an alkaline phosphatase (ALP)/tyrosinase (TYR) bi-enzyme cascade system, a sensitive split-type cathodic PEC bioanalysis for the determination of ALP was achieved. Read More

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January 2021

Novel synthesis of hierarchical [email protected] core-shell hetero-nanostructured nanowall arrays on carbon cloth for high-performance all-solid-state asymmetrical supercapacitors.

J Colloid Interface Sci 2021 Apr 25;587:302-310. Epub 2020 Nov 25.

Materials and Energy School, Guangdong University of Technology, No. 100 Waihuan Xi Road, Guangzhou Higher Education Mega Center, Panyu District, Guangzhou 510006, PR China. Electronic address:

A hierarchical [email protected] core-shell nanowall arrays have been grown on carbon cloth by stepwise design and fabrication. Ultrathin MnO nanoflakes are revealed to grow uniformly on the porous NiGaO nanowalls with many interparticle mesopores, resulting in the formation of 3D core-shell nanowall arrays with hierarchical architecture. The as-synthesized product as a binder-free electrode possesses a high specific capacitance of 1700 F g at 1 A g and 90% capacitance retention after 10,000 cycles at 10 A g. Read More

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Sensing of COVID-19 Antibodies in Seconds via Aerosol Jet Nanoprinted Reduced-Graphene-Oxide-Coated 3D Electrodes.

Adv Mater 2021 Feb 22;33(7):e2006647. Epub 2020 Dec 22.

Department of Mechanical Engineering, Carnegie Mellon University, Pittsburgh, PA, 15213, USA.

Rapid diagnosis is critical for the treatment and prevention of diseases. An advanced nanomaterial-based biosensing platform that detects COVID-19 antibodies within seconds is reported. The biosensing platform is created by 3D nanoprinting of three-dimensional electrodes, coating the electrodes by nanoflakes of reduced-graphene-oxide (rGO), and immobilizing specific viral antigens on the rGO nanoflakes. Read More

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February 2021

Three-dimensional hierarchical core-shell [email protected](OH) nanoflakes as high-performance electrode materials for flexible supercapacitors.

J Colloid Interface Sci 2021 Mar 5;586:797-806. Epub 2020 Nov 5.

College of Science, University of Shanghai for Science and Technology, Jungong Road 334#, 200093 Shanghai, China.

Rational design of composite electrode materials with novel nanostructures plays an important role in improving both high energy density and structure stability of flexible and wearable supercapacitors. Herein, numerous peculiar three-dimensional hierarchical core-shell [email protected](OH) nanoflakes directly grown on Ni foam are synthesized via a facile hydrothermal method and subsequent electrodeposition technique. Ultrathin Co(OH) nanosheets arrays vertically anchored on CuCoO nanoflakes can not only improve the electrical conductivity, but also provide interconnected channels for ion diffusion and enrich electrochemical active sites to boost faradaic redox reaction, leading to the enhanced electrochemical behavior. Read More

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Do the graphene nanoflakes pose a potential threat to the polychaete Hediste diversicolor?

Chemosphere 2021 Apr 22;269:128685. Epub 2020 Oct 22.

Laboratory of Spectroscopy and Molecular Interactions, Department of Chemistry, University of Warsaw, Pasteura 1, 02-093, Warsaw, Poland; The University of Warsaw Biological and Chemical Research Centre (CNBCh UW), Żwirki I Wigury 101 St., 02-089, Warsaw, Poland. Electronic address:

Graphene is a promising material with a wide range of future applications that could potentially lead to its transfer from numerous water and terrestrial sources to the sea, thus fate and effects of graphene in the marine ecosystem deserve attention. Within this work, the impact of the short- and long-term exposure (36 h and 24 days) of the marine benthic polychaete Hediste diversicolor to various concentrations (36 h: 0.4, 4, 40 and 400 mg L; 24 days: 4 and 40 mg L) of the pristine graphene multilayer nanoflakes (of thickness 8-12 nm) was investigated. Read More

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Microporous carbon nanoflakes derived from biomass cork waste for CO capture.

Sci Total Environ 2020 Dec 2;748:142465. Epub 2020 Oct 2.

Department of Sustainable Bioproducts, Mississippi State University, Mississippi State, MS 39762, USA. Electronic address:

Porous structure design is considered to be a promising strategy for the development of effective sorbents for CO capture. Herein, a series of carbon nanoflakes with large surface area (up to 2380 m/g) and high micropore volume (up to 0.896 m/g) were synthesized from a renewable precursor, cork dust waste, to capture CO at atmospheric pressure. Read More

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December 2020

Selective S/LiS Conversion in-Built Crystal Facet Self-Mediation: Toward High Volumetric Energy Density Lithium-Sulfur Batteries.

ACS Nano 2020 Nov 28;14(11):15011-15022. Epub 2020 Oct 28.

Henan Key Laboratory of Photovoltaic Materials, Henan University, Kaifeng, 475004, People's Republic of China.

The gravimetric, areal, and volumetric capacities pose important influences on market penetration for secondary batteries. Carbonaceous materials take a leading stand for the improvement of gravimetric and areal capacity in lithium-sulfur batteries; however, they exhibit some intrinsic deficiencies, including insufficient fixation on lithium polysulfides (LiPS) and low tap density, incurring poor volumetric performance and inferior cycling behavior. Here, we report a sulfur cathode based on highly conductive ZrB nanoflakes with only 2 wt % conductive carbon. Read More

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November 2020

One-Pot Synthesized Biomass C-Si Nanocomposites as an Anodic Material for High-Performance Sodium-Ion Battery.

Nanomaterials (Basel) 2020 Aug 31;10(9). Epub 2020 Aug 31.

Division of Physics & Semiconductor Science, Dongguk University-Seoul, Seoul 04620, Korea.

Aiming at materializing an excellent anodic source material of the high-performance sodium-ion battery (SIB), we fabricated the biomass carbon-silicon (C-Si) nanocomposites by the one-pot synthesis of facile magnesiothermic reduction using brown rice husk ashes. The C-Si nanocomposites displayed an aggregated morphology, where the spherical Si nanoparticles (9 nm on average) and the C nanoflakes were encapsulated and decorated with each other. When utilizing the nanocomposites as an SIB anode, a high initial discharge capacity (i. Read More

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Tin disulfide-graphene oxide-β-cyclodextrin mediated electro-oxidation of melatonin hormone: an efficient platform for electrochemical sensing.

J Mater Chem B 2020 08;8(33):7539-7547

Department of Neurosurgical Oncology, First Hospital of Jilin University, Changchun, China.

Here, we have developed an electrochemical sensor based on integrated 2D materials including tin disulfide (SnS2) nanoflakes, graphene oxide (GO), and β-cyclodextrin (β-CD) forming a ternary nanocomposite decorated on a screen-printed electrode (SPE) for the electrochemical detection of melatonin. Hydrothermally synthesized SnS2 was mixed with GO/β-CD to prepare the ternary composite via an ultra-sonication process. The nanocomposite was characterized using X-ray diffraction (XRD), field emission scanning electron microscopy (FE-SEM), and field emission transmission electron microscopy (FEG-TEM). Read More

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Upcycling of Wastewater via Effective Photocatalytic Hydrogen Production Using MnO Nanoparticles-Decorated Activated Carbon Nanoflakes.

Nanomaterials (Basel) 2020 Aug 17;10(8). Epub 2020 Aug 17.

Department of Chemistry, Periyar University, Salem 636011, Tamil Nadu, India.

In the present work, we demonstrated the upcycling technique of effective wastewater treatment via photocatalytic hydrogen production by using the nanocomposites of manganese oxide-decorated activated carbon (MnO-AC). The nanocomposites were sonochemically synthesized in pure water by utilizing MnO nanoparticles and AC nanoflakes that had been prepared through green routes using the extracts of Brassica oleracea and Azadirachta indica, respectively. MnO-AC nanocomposites were confirmed to exist in the form of nanopebbles with a high specific surface area of ~109 m/g. Read More

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Synergistic antibacterial activity of streptomycin sulfate loaded PEG-MoS/rGO nanoflakes assisted with near-infrared.

Mater Sci Eng C Mater Biol Appl 2020 Nov 20;116:111221. Epub 2020 Jun 20.

School of Food and Biological Engineering, Hefei University of Technology, 230009 Hefei, Anhui, PR China; Anhui Institute of Agro-Products Intensive Processing Technology, 230009, Hefei, Anhui, PR China.

Synergistic antibacterial strategies have received growing attention due to their significantly enhanced antibacterial activity. Herein, we demonstrated a synergistic antibacterial strategy based on streptomycin sulfate (SS) loaded polyethylene glycol-MoS/reduced graphene oxide (PEG-MoS/rGO) nanoflakes assisted with near-infrared (NIR). The nanoflakes of PEG-MoS/rGO were ultrasonically exfoliated well from the nanoflowers of PEG-MoS/rGO fabricated by hydrothermal method, which was of antibacterial activity against Staphylococcus aureus and Escherichia coli after loading of SS. Read More

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November 2020

Nickel cobalt manganese ternary carbonate hydroxide nanoflakes branched on cobalt carbonate hydroxide nanowire arrays as novel electrode material for supercapacitors with outstanding performance.

J Colloid Interface Sci 2021 Jan 28;581(Pt A):11-20. Epub 2020 Jul 28.

College of Material Science and Engineering, Institute for Graphene Applied Technology Innovation, Qingdao University, Qingdao 266071, Shandong, China; College of Material Science and Engineering, Linyi University, Linyi 276000 Shandong, China. Electronic address:

In this work, for the first time we are reporting the development of a kind of high rate and long cycle life electrode composed of nickel cobalt manganese ternary carbonate hydroxide (NiCoMn-CH) ultrathin nanoflakes coated on Co-CH nanowire arrays (NWAs), which are directly generated on a nickel foam (NF) support. The hierarchical heterostructures are synthesized via a scalable two step solvothermal strategy without any adscititious surfactant and binder. The smart combination of Co-CH and NiCoMn-CH nanostructures in the nanowire arrays shows significant synergistic effect on the enhancement of the electrochemical performance of the as-fabricated supercapacitors. Read More

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January 2021

Graphitic carbon nitride/graphene nanoflakes hybrid system for electrochemical sensing of DNA bases in meat samples.

Sci Rep 2020 07 30;10(1):12860. Epub 2020 Jul 30.

Institute of Nano Electronic Engineering, 01000, Kangar, Malaysia.

This research presents a simple, fast and simultaneous electrochemical quantitative determination of nucleobases, for example guanine (G), adenine (A), and thymine (T) in a beef and chicken livers samples to measure the quality of food products based on hybrids of graphitic carbon nitride/Graphene nanoflakes (g-CN/GNF) modified electrode. Graphitic carbon nitride (g-CN) made of graphite-like covalent link connects nitrogen, nitride, and carbon atoms in the structural design with improved the electrical properties and low band gap semiconductor. The g-CN/GNF nanocomposite was synthesized by the hydrothermal treatment to form a porous g-CN interconnected three dimensional (3D) network of g-CN and GNF. Read More

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Directional Diels-Alder cycloadditions of isoelectronic graphene and hexagonal boron nitride in oriented external electric fields: reaction axis rule vs. polarization axis rule.

Nanoscale 2020 Jul;12(28):15364-15370

Department of Chemistry, School of Science, Xi'an Jiaotong University, Xi'an 710049, China.

The present study introduces the mechanisms for the oriented external electric field (OEEF)-participating cycloadditions of nanographene and the analogous hexagonal boron nitride (h-BN) nanoflakes. Despite the C-C and B-N pairs being isoelectronic, their different ionicities give rise to their distinct response to applied electric fields. For the nanographene models, the Diels-Alder addition obeyed the reaction axis rule and the activation barrier changed under an OEEF perpendicular to the carbon skeleton for enhanced/reduced intermolecular charge transfer, which provides a feasible strategy for the side-selective derivatization of graphene to obtain one-face-only adducts and Janus bifunctional products. Read More

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The electronic structure of van der Waals heterostructures formed by the nanoflakes of black phosphorene with those of graphene and haeckelites: their complexes with Li.

J Mol Model 2020 Jul 10;26(8):204. Epub 2020 Jul 10.

Instituto de Investigaciones en Materiales, Universidad Nacional Autónoma de México, Apartado Postal 70-360, CU, Coyoacán, 04510, Mexico, DF, Mexico.

The electronic structure of the van der Waals heterostructures (HSs) of the phosphorene (P) nanoflakes (NFs) with graphene (G) and its allotropy (H1 and H2) NFs, and their complexes with Li have been studied using dispersion-corrected TPSS functional. According to the calculations, the attractive interactions in HSs come from dispersion. It has a relatively small contribution to the binding energy in Li complexes, especially for these forming complexes with G, H1, or H2 NF side. Read More

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Iron doped graphitic carbon nitride with peroxidase like activity for colorimetric detection of sarcosine and hydrogen peroxide.

Mikrochim Acta 2020 06 12;187(7):383. Epub 2020 Jun 12.

State Key Laboratory of Biocatalysis and Enzyme Engineering, Ministry of Education Key Laboratory for the Synthesis and Application of Organic Functional Molecules, College of Chemistry and Chemical Engineering, Hubei University, Wuhan, 430062, People's Republic of China.

The successful synthesis is reported of Mn, Fe, Co, Ni, Cu-doped g-CN nanoflakes via a simple one-step pyrolysis method, respectively. Among them, the Fe-doped g-CN nanoflakes exhibited the highest peroxidase-like activity, which can be used for colorimetric detection of hydrogen peroxide (HO) and sarcosine (SA), within the detection ranges of 2-100 μM and 10-500 μM and detection limits of 1.8 μM and 8. Read More

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Microribbons composed of directionally self-assembled nanoflakes as highly stretchable ionic neural electrodes.

Proc Natl Acad Sci U S A 2020 06 12;117(26):14667-14675. Epub 2020 Jun 12.

Key Laboratory of Organic Optoelectronics and Molecular Engineering of the Ministry of Education, Department of Chemistry, Tsinghua University, 100084 Beijing, People's Republic of China;

Many natural materials possess built-in structural variation, endowing them with superior performance. However, it is challenging to realize programmable structural variation in self-assembled synthetic materials since self-assembly processes usually generate uniform and ordered structures. Here, we report the formation of asymmetric microribbons composed of directionally self-assembled two-dimensional nanoflakes in a polymeric matrix during three-dimensional direct-ink printing. Read More

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