99951
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Synthesis of Active Graphene with Para-Ester on Cotton Fabrics for Antistatic Properties. NANOMATERIALS 2020; 10:nano10061147. [PMID: 32545323 PMCID: PMC7353349 DOI: 10.3390/nano10061147] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/03/2020] [Revised: 06/04/2020] [Accepted: 06/04/2020] [Indexed: 01/25/2023]
Abstract
The excellent electrical properties of graphene provide a new functional finishing idea for fabricating conductive cotton fabrics with antistatic properties. This work develops a novel method for synthesizing active graphene to make cotton fabrics conductive and to have antistatic properties. The graphite was oxidized to graphene oxide (GO) by the Hummers method, and was further acid chlorinated and reacted with the para-ester to form the active graphene (JZGO). JZGO was then applied to cotton fabrics and was bonded to the fiber surface under alkaline conditions. Characterizations were done using FT-IR, XRD and Raman spectroscopy, which indicated that the para-ester group was successfully introduced onto JZGO, which also effectively improved the water dispersibility and reactivity of the JZGO. Furthermore, this study found that the antistatic properties of the fabric were increased by more than 50% when JZGO was 3% by weight under low-humidity conditions. The washing durability of the fabrics was also evaluated.
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99952
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Affiliation(s)
- Bingzhang Lu
- Department of Chemistry and Biochemistry, University of California, 1156 High Street, Santa Cruz, California 95064, United States
| | - Qiming Liu
- Department of Chemistry and Biochemistry, University of California, 1156 High Street, Santa Cruz, California 95064, United States
| | - Shaowei Chen
- Department of Chemistry and Biochemistry, University of California, 1156 High Street, Santa Cruz, California 95064, United States
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99953
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Reichmuth AM, Zimmermann M, Wilhelm F, Frutiger A, Blickenstorfer Y, Fattinger C, Waldhoer M, Vörös J. Quantification of Molecular Interactions in Living Cells in Real Time using a Membrane Protein Nanopattern. Anal Chem 2020; 92:8983-8991. [DOI: 10.1021/acs.analchem.0c00987] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Affiliation(s)
- Andreas Michael Reichmuth
- Laboratory of Biosensors and Bioelectronics, Institute of Biomedical Engineering, University and ETH Zurich, 8092 Zurich, Switzerland
| | | | - Florian Wilhelm
- InterAx Biotech, PARK innovAARE, 5234 Villigen, Switzerland
- Department of Biosystems Science and Engineering, ETH Zurich, 4058 Basel, Switzerland
| | - Andreas Frutiger
- Laboratory of Biosensors and Bioelectronics, Institute of Biomedical Engineering, University and ETH Zurich, 8092 Zurich, Switzerland
| | - Yves Blickenstorfer
- Laboratory of Biosensors and Bioelectronics, Institute of Biomedical Engineering, University and ETH Zurich, 8092 Zurich, Switzerland
| | - Christof Fattinger
- Roche Pharma Research and Early Development, Roche Innovation Center Basel, 4070 Basel, Switzerland
| | - Maria Waldhoer
- InterAx Biotech, PARK innovAARE, 5234 Villigen, Switzerland
| | - János Vörös
- Laboratory of Biosensors and Bioelectronics, Institute of Biomedical Engineering, University and ETH Zurich, 8092 Zurich, Switzerland
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99954
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Kang Y, Wang W, Li J, Mi Y, Gong H, Lei Z. 3D Rosa centifolia-like CeO 2 encapsulated with N-doped carbon as an enhanced electrocatalyst for Zn-air batteries. J Colloid Interface Sci 2020; 578:796-804. [PMID: 32574912 DOI: 10.1016/j.jcis.2020.06.040] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/30/2020] [Revised: 06/07/2020] [Accepted: 06/08/2020] [Indexed: 02/07/2023]
Abstract
Reasonable design and synthesis of high-efficiency rare earth oxides-based materials as alternatives to noble-metal catalysts are of great significance for oxygen electrocatalysis. Herein, we report three-dimension (3D) Rosa centifolia-like CeO2 encapsulated with N-doped carbon (NC) composites (CeO2@NC) for enhancing oxygen reduction reaction (ORR) and oxygen evolution reaction (OER) activities. This synthetic method allows CeO2 to tune the oxygen vacancy concentration and electronic structure of a series of CeO2@NC catalysts due to its large oxygen-storage-capacity (OSC) property. Moreover, benefiting from the exposed active sites in NC as well as the synergy between CeO2 and NC, among as-prepared samples, the resultant CeO2@NC-900 delivers a half-wave potential (E1/2) of 0.854 V, which is more positive compared with counterpart of NC-900 (0.806 V) and even comparable to that of commercial Pt/C catalyst (0.855 V). This indicates that the ORR electrocatalytic activity of CeO2@NC-900 is significantly improved. Meanwhile, CeO2@NC-900 exhibits satisfactory performance toward OER. For practical application, the CeO2@NC-900 involved rechargeable Zn-air battery possesses excellent energy efficiency, superior stability, and large energy density (666.1 Wh kgZn-1 at 5 mA cm-2). This approach provides a valid way to develop advanced rare earth oxides-based materials for energy applications.
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Affiliation(s)
- Yumao Kang
- Key Laboratory of Eco-Environment-Related Polymer Materials, Ministry of Education of China, Key Laboratory of Gansu Polymer Materials, College of Chemistry and Chemical Engineering, Northwest Normal University, Lanzhou 730070, China
| | - Wei Wang
- School of Chemical and Biological Engineering, Lanzhou Jiaotong University, Lanzhou 730070, China.
| | - Jinmei Li
- State Key Laboratory of Applied Organic Chemistry and Key Laboratory of Nonferrous Metal Chemistry and Resources Utilization of Gansu Province, College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou 730000, China
| | - Yajun Mi
- Key Laboratory of Eco-Environment-Related Polymer Materials, Ministry of Education of China, Key Laboratory of Gansu Polymer Materials, College of Chemistry and Chemical Engineering, Northwest Normal University, Lanzhou 730070, China
| | - Hongyan Gong
- Key Laboratory of Eco-Environment-Related Polymer Materials, Ministry of Education of China, Key Laboratory of Gansu Polymer Materials, College of Chemistry and Chemical Engineering, Northwest Normal University, Lanzhou 730070, China
| | - Ziqiang Lei
- Key Laboratory of Eco-Environment-Related Polymer Materials, Ministry of Education of China, Key Laboratory of Gansu Polymer Materials, College of Chemistry and Chemical Engineering, Northwest Normal University, Lanzhou 730070, China.
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99955
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Boakye-Ansah S, Khan MA, Haase MF. Controlling Surfactant Adsorption on Highly Charged Nanoparticles to Stabilize Bijels. THE JOURNAL OF PHYSICAL CHEMISTRY. C, NANOMATERIALS AND INTERFACES 2020; 124:12417-12423. [PMID: 32550963 PMCID: PMC7295363 DOI: 10.1021/acs.jpcc.0c01440] [Citation(s) in RCA: 17] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/19/2020] [Revised: 05/09/2020] [Indexed: 05/14/2023]
Abstract
Bicontinuous particle-stabilized emulsions (bijels) are networks of interpenetrating oil/water channels with applications in catalysis, tissue engineering, and energy storage. Bijels can be generated by arresting solvent transfer induced phase separation (STrIPS) via interfacial jamming of nanoparticles. However, until now, STrIPS bijels have only been formed with silica nanoparticles of low surface charge densities, limiting their potential applications in catalysis and fluid transport. Here, we show how strongly charged silica nanoparticles can stabilize bijels. To this end, we carry out a systematic study employing dynamic light scattering, zeta potential, acid/base titrations, turbidimetry, surface tension, and confocal microscopy. We find that moderating the adsorption of oppositely charged surfactants on the particles is crucial to facilitate particle dispersibility in the bijel casting mixture and bijel stabilization. Our results potentially introduce a general understanding for bijel fabrication with different inorganic nanoparticle materials of variable charge density.
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Affiliation(s)
- Stephen Boakye-Ansah
- Department of Chemical
Engineering, Rowan University, 201 Mullica Hill Road, Glassboro, New Jersey 08028, United States
| | - Mohd Azeem Khan
- Van’t
Hoff Laboratory for Physical and Colloidal Chemistry, Debye Institute
for Nanomaterial Science, Utrecht University, Padualaan 8, Utrecht 3584 CH, The Netherlands
| | - Martin F. Haase
- Department of Chemical
Engineering, Rowan University, 201 Mullica Hill Road, Glassboro, New Jersey 08028, United States
- Van’t
Hoff Laboratory for Physical and Colloidal Chemistry, Debye Institute
for Nanomaterial Science, Utrecht University, Padualaan 8, Utrecht 3584 CH, The Netherlands
- Mailing Address: Van’t Hoff Laboratory for Physical and Colloidal
Chemistry, Debye Institute for Nanomaterial Science, Utrecht University,
Padualaan 8, Utrecht 3584 CH, The Netherlands; Phone: +31(0)3-02532547;
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99956
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Abstract
AbstractAbiotic–biological hybrid systems that combine the advantages of abiotic catalysis and biotransformation for the conversion of carbon dioxide (CO2) to value-added chemicals and fuels have emerged as an appealing way to address the global energy and environmental crisis caused by increased CO2 emission. We illustrate the recent progress in this field. Here, we first review the natural CO2 fixation pathways for an in-depth understanding of the biological CO2 transformation strategy and why a sustainable feed of reducing power is important. Second, we review the recent progress in the construction of abiotic–biological hybrid systems for CO2 transformation from two aspects: (i) microbial electrosynthesis systems that utilize electricity to support whole-cell biological CO2 conversion to products of interest and (ii) photosynthetic semiconductor biohybrid systems that integrate semiconductor nanomaterials with CO2-fixing microorganisms to harness solar energy for biological CO2 transformation. Lastly, we discuss potential approaches for further improvement of abiotic–biological hybrid systems.
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99957
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Rosenkranz A, Liu Y, Yang L, Chen L. 2D nano-materials beyond graphene: from synthesis to tribological studies. APPLIED NANOSCIENCE 2020. [DOI: 10.1007/s13204-020-01466-z] [Citation(s) in RCA: 51] [Impact Index Per Article: 12.8] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
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99958
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Meidanchi A, Ansari H. Copper Spinel Ferrite Superparamagnetic Nanoparticles as a Novel Radiotherapy Enhancer Effect in Cancer Treatment. J CLUST SCI 2020. [DOI: 10.1007/s10876-020-01832-5] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
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99959
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Xia Y, Martin C, Seibel J, Eyley S, Thielemans W, van der Auweraer M, Mali KS, De Feyter S. Iodide mediated reductive decomposition of diazonium salts: towards mild and efficient covalent functionalization of surface-supported graphene. NANOSCALE 2020; 12:11916-11926. [PMID: 32478349 DOI: 10.1039/d0nr03309j] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
Covalent functionalization of graphene is highly sought after, not only in view of the potential applications of the chemically modified material, but also because it brings fundamental insight into the chemistry of graphene. Thus, strategies that yield chemically modified graphene with densely grafted films of aryl groups via simple experimental protocols have been the focus of intense research. Here we report a mild, straightforward and efficient approach to graphene/graphite functionalization using iodide mediated reductive dediazoniation of aryldiazonium salts. The experimental protocol employs aqueous solutions of the reagents. The reaction proceeds rapidly at room temperature without the need of any environmental or electrochemical control. The covalently modified surfaces were characterized at the nanometer scale using a combination of complementary surface analytical techniques. The degree of covalent functionalization, and the morphology, as well as the thickness of the grafted films were studied at the molecular level using Raman spectroscopy and scanning probe microscopy, respectively. Furthermore, solution phase UV-Vis spectroscopy was employed to understand the mechanistic aspects. This work demonstrates a facile and scalable covalent modification method compatible for both bulk and monolayer functionalization of graphene.
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Affiliation(s)
- Yuanzhi Xia
- Department of Chemistry, Division of Molecular Imaging and Photonics, KU Leuven, Celestijnenlaan 200F, B-3001 Leuven, Belgium.
| | - Cristina Martin
- Department of Chemistry, Division of Molecular Imaging and Photonics, KU Leuven, Celestijnenlaan 200F, B-3001 Leuven, Belgium. and Departamento de Química Física, Facultad de Farmacia, Universidad de Castilla-La Mancha, 02071 Albacete, Spain
| | - Johannes Seibel
- Department of Chemistry, Division of Molecular Imaging and Photonics, KU Leuven, Celestijnenlaan 200F, B-3001 Leuven, Belgium.
| | - Samuel Eyley
- Department of Chemical Engineering, Sustainable Materials Lab, KU Leuven, Campus Kulak Kortrijk, Etienne Sabbelaan 53, 8500 Kortrijk, Belgium
| | - Wim Thielemans
- Department of Chemical Engineering, Sustainable Materials Lab, KU Leuven, Campus Kulak Kortrijk, Etienne Sabbelaan 53, 8500 Kortrijk, Belgium
| | - Mark van der Auweraer
- Department of Chemistry, Division of Molecular Imaging and Photonics, KU Leuven, Celestijnenlaan 200F, B-3001 Leuven, Belgium.
| | - Kunal S Mali
- Department of Chemistry, Division of Molecular Imaging and Photonics, KU Leuven, Celestijnenlaan 200F, B-3001 Leuven, Belgium.
| | - Steven De Feyter
- Department of Chemistry, Division of Molecular Imaging and Photonics, KU Leuven, Celestijnenlaan 200F, B-3001 Leuven, Belgium.
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99960
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Kumar S, Pearse A, Liu Y, Taylor RE. Modular self-assembly of gamma-modified peptide nucleic acids in organic solvent mixtures. Nat Commun 2020; 11:2960. [PMID: 32528008 PMCID: PMC7289805 DOI: 10.1038/s41467-020-16759-8] [Citation(s) in RCA: 21] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/18/2019] [Accepted: 05/20/2020] [Indexed: 02/03/2023] Open
Abstract
Nucleic acid-based materials enable sub-nanometer precision in self-assembly for fields including biophysics, diagnostics, therapeutics, photonics, and nanofabrication. However, structural DNA nanotechnology has been limited to substantially hydrated media. Transfer to organic solvents commonly used in polymer and peptide synthesis results in the alteration of DNA helical structure or reduced thermal stabilities. Here we demonstrate that gamma-modified peptide nucleic acids (γPNA) can be used to enable formation of complex, self-assembling nanostructures in select polar aprotic organic solvent mixtures. However, unlike the diameter-monodisperse populations of nanofibers formed using analogous DNA approaches, γPNA structures appear to form bundles of nanofibers. A tight distribution of the nanofiber diameters could, however, be achieved in the presence of the surfactant SDS during self-assembly. We further demonstrate nanostructure morphology can be tuned by means of solvent solution and by strand substitution with DNA and unmodified PNA. This work thereby introduces a science of γPNA nanotechnology.
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Affiliation(s)
- Sriram Kumar
- Department of Mechanical Engineering, Carnegie Mellon University, Pittsburgh, PA, USA
| | - Alexander Pearse
- Department of Chemistry, Carnegie Mellon University, Pittsburgh, PA, USA
| | - Ying Liu
- Department of Mechanical Engineering, Carnegie Mellon University, Pittsburgh, PA, USA
| | - Rebecca E Taylor
- Department of Mechanical Engineering, Carnegie Mellon University, Pittsburgh, PA, USA. .,Department of Biomedical Engineering, Carnegie Mellon University, Pittsburgh, PA, USA. .,Department of Electrical and Computer Engineering, Carnegie Mellon University, Pittsburgh, PA, USA.
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99961
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Zondiner U, Rozen A, Rodan-Legrain D, Cao Y, Queiroz R, Taniguchi T, Watanabe K, Oreg Y, von Oppen F, Stern A, Berg E, Jarillo-Herrero P, Ilani S. Cascade of phase transitions and Dirac revivals in magic-angle graphene. Nature 2020; 582:203-208. [PMID: 32528091 DOI: 10.1038/s41586-020-2373-y] [Citation(s) in RCA: 121] [Impact Index Per Article: 30.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/25/2019] [Accepted: 04/23/2020] [Indexed: 11/09/2022]
Abstract
Twisted bilayer graphene near the magic angle1-4 exhibits rich electron-correlation physics, displaying insulating3-6, magnetic7,8 and superconducting phases4-6. The electronic bands of this system were predicted1,2 to narrow markedly9,10 near the magic angle, leading to a variety of possible symmetry-breaking ground states11-17. Here, using measurements of the local electronic compressibility, we show that these correlated phases originate from a high-energy state with an unusual sequence of band population. As carriers are added to the system, the four electronic 'flavours', which correspond to the spin and valley degrees of freedom, are not filled equally. Rather, they are populated through a sequence of sharp phase transitions, which appear as strong asymmetric jumps of the electronic compressibility near integer fillings of the moiré lattice. At each transition, a single spin/valley flavour takes all the carriers from its partially filled peers, 'resetting' them to the vicinity of the charge neutrality point. As a result, the Dirac-like character observed near charge neutrality reappears after each integer filling. Measurement of the in-plane magnetic field dependence of the chemical potential near filling factor one reveals a large spontaneous magnetization, further substantiating this picture of a cascade of symmetry breaking. The sequence of phase transitions and Dirac revivals is observed at temperatures well above the onset of the superconducting and correlated insulating states. This indicates that the state that we report here, with its strongly broken electronic flavour symmetry and revived Dirac-like electronic character, is important in the physics of magic-angle graphene, forming the parent state out of which the more fragile superconducting and correlated insulating ground states emerge.
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Affiliation(s)
- U Zondiner
- Department of Condensed Matter Physics, Weizmann Institute of Science, Rehovot, Israel
| | - A Rozen
- Department of Condensed Matter Physics, Weizmann Institute of Science, Rehovot, Israel
| | - D Rodan-Legrain
- Department of Physics, Massachusetts Institute of Technology, Cambridge, MA, USA
| | - Y Cao
- Department of Physics, Massachusetts Institute of Technology, Cambridge, MA, USA
| | - R Queiroz
- Department of Condensed Matter Physics, Weizmann Institute of Science, Rehovot, Israel
| | - T Taniguchi
- National Institute for Materials Science, Tsukuba, Japan
| | - K Watanabe
- National Institute for Materials Science, Tsukuba, Japan
| | - Y Oreg
- Department of Condensed Matter Physics, Weizmann Institute of Science, Rehovot, Israel
| | - F von Oppen
- Dahlem Center for Complex Quantum Systems and Fachbereich Physik, Freie Universität Berlin, Berlin, Germany
| | - Ady Stern
- Department of Condensed Matter Physics, Weizmann Institute of Science, Rehovot, Israel
| | - E Berg
- Department of Condensed Matter Physics, Weizmann Institute of Science, Rehovot, Israel
| | - P Jarillo-Herrero
- Department of Physics, Massachusetts Institute of Technology, Cambridge, MA, USA.
| | - S Ilani
- Department of Condensed Matter Physics, Weizmann Institute of Science, Rehovot, Israel.
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99962
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Tsuruoka Y, Obi T, Kizuka T. Reversible phase-transition control in nanometer-sized zirconium wires via pulse-voltage impression. NANO EXPRESS 2020. [DOI: 10.1088/2632-959x/ab951e] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
Abstract
Pulse-voltage-stimulated phase transition in nanometer-sized zirconium (Zr) wires was observed in situ by high-resolution transmission electron microscopy. Simultaneously, the variation in conductance during the transition between crystalline and amorphous phases was examined. The crystalline phase of a hexagonal closed-packed structure in the wires transformed into an amorphous phase while applying pulse voltages of 4 ns in width, and subsequently returned to the initial crystalline phase by the impression of pulse voltages of 5 ms in width; the reversible phase transition via voltage impression using shorter and longer pulse waves was observed. The average conductance per a unit area in the amorphous phases was decreased to 0.87 of the crystalline phases. The amorphous region in the wires expanded gradually by every pulse-voltage impression, whereas the conductance decreased stepwise in response to the gradual expansion. It was demonstrated that the conductance of the wires can be controlled in a stepwise manner via pulse-voltage impression, leading to the application of the nanowires to functional nanodevices.
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99963
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Poyato R, Verdugo R, Muñoz-Ferreiro C, Gallardo-López Á. Electrochemically Exfoliated Graphene-Like Nanosheets for Use in Ceramic Nanocomposites. MATERIALS (BASEL, SWITZERLAND) 2020; 13:E2656. [PMID: 32545193 PMCID: PMC7321611 DOI: 10.3390/ma13112656] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/21/2020] [Revised: 06/02/2020] [Accepted: 06/04/2020] [Indexed: 11/17/2022]
Abstract
In this work, the synthesis of graphene-like nanosheets (GNS) by an electrochemical exfoliation method, their microstructural characterization and their performance as fillers in a ceramic matrix composite have been assessed. To fabricate the composites, 3 mol % yttria tetragonal zirconia (3YTZP) powders with 1 vol % GNS were processed by planetary ball milling in tert-butanol to enhance the GNS distribution throughout the matrix, and densified by spark plasma sintering (SPS). According to a thorough Raman analysis and SEM observations, the electrochemically exfoliated GNS possessed less than 10 graphene layers and a lateral size lower than 1 μm. However, they contained amorphous carbon and vacancy-like defects. In contrast the GNS in the sintered composite exhibited enhanced quality with a lower number of defects, and they were wavy, semi-transparent and with very low thickness. The obtained nanocomposite was fully dense with a homogeneous distribution of GNS into the matrix. The Vickers hardness of the nanocomposite showed similar values to those of a monolithic 3YTZP ceramic sintered in the same conditions, and to the reported ones for a 3YTZP composite with the same content of commercial graphene nanosheets.
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Affiliation(s)
- Rosalía Poyato
- Instituto de Ciencia de Materiales de Sevilla, ICMS (CSIC-US), Américo Vespucio 49, 41092 Sevilla, Spain
| | - Reyes Verdugo
- Departamento de Física de la Materia Condensada, ICMS, CSIC-Universidad de Sevilla, Apdo. 1065, 41080 Sevilla, Spain; (R.V.); (C.M.-F.); (Á.G.-L.)
| | - Carmen Muñoz-Ferreiro
- Departamento de Física de la Materia Condensada, ICMS, CSIC-Universidad de Sevilla, Apdo. 1065, 41080 Sevilla, Spain; (R.V.); (C.M.-F.); (Á.G.-L.)
| | - Ángela Gallardo-López
- Departamento de Física de la Materia Condensada, ICMS, CSIC-Universidad de Sevilla, Apdo. 1065, 41080 Sevilla, Spain; (R.V.); (C.M.-F.); (Á.G.-L.)
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99964
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Sanna V, Sechi M. Therapeutic Potential of Targeted Nanoparticles and Perspective on Nanotherapies. ACS Med Chem Lett 2020; 11:1069-1073. [PMID: 32550978 DOI: 10.1021/acsmedchemlett.0c00075] [Citation(s) in RCA: 30] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023] Open
Abstract
Engineered nanoparticles (NPs) to specifically deliver payload therapeutics to target cells involved in pathophysiological processes seem to offer a powerful strategy to overcome intrinsic limitations of drugs. In this Viewpoint we disclose the synergistic potential between medicinal chemistry and nanomedicine to exploit the "targeting concept" in developing effective nanotherapeutics, as well as the challenges and limitations that should be considered in pursuing their clinical translation, especially toward precision medicine.
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Affiliation(s)
- Vanna Sanna
- Nanomater s.r.l., c/o Porto Conte Ricerche, 07041, Alghero, Italy
| | - Mario Sechi
- Department of Chemistry and Pharmacy, Laboratory of Drug Design and Nanomedicine, University of Sassari, 07100 Sassari, Italy
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99965
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Gutiérrez-Arzaluz L, Ahmed GH, Yang H, Shikin S, Bakr OM, Malko AV, Mohammed OF. Correlation of Photoluminescence and Structural Morphologies at the Individual Nanoparticle Level. J Phys Chem A 2020; 124:4855-4860. [PMID: 32396362 PMCID: PMC7304063 DOI: 10.1021/acs.jpca.0c02340] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
![]()
Single-particle
spectroscopy has demonstrated great potential for
analyzing the microscopic behavior of various nanoparticles (NPs).
However, high-resolution optical imaging of these materials at the
nanoscale is still very challenging. Here, we present an experimental
setup that combines high sensitivity of time-correlated single-photon
counting (TCSPC) techniques with atomic force microscopy (AFM). This
system enables single-photon detection with a time resolution of 120
ps and a spatial resolution of 5 nm. We utilize the setup to investigate
the photoluminescence (PL) characteristics of both zero-dimensional
(0D) and three-dimensional (3D) perovskite nanocrystals and establish
a correlation between the particles’ sizes, their PL blinking,
and the lifetime behavior. Our system demonstrates an unprecedented
level of information, opening the door to understanding the morphology–luminescence
correlation of various nanosystems.
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Affiliation(s)
- Luis Gutiérrez-Arzaluz
- Division of Physical Sciences and Engineering, King Abdullah University of Science and Technology, Thuwal 23955-6900, Kingdom of Saudi Arabia
| | - Ghada H Ahmed
- Division of Physical Sciences and Engineering, King Abdullah University of Science and Technology, Thuwal 23955-6900, Kingdom of Saudi Arabia
| | - Haoze Yang
- Division of Physical Sciences and Engineering, King Abdullah University of Science and Technology, Thuwal 23955-6900, Kingdom of Saudi Arabia
| | - Semen Shikin
- Division of Physical Sciences and Engineering, King Abdullah University of Science and Technology, Thuwal 23955-6900, Kingdom of Saudi Arabia
| | - Osman M Bakr
- Division of Physical Sciences and Engineering, King Abdullah University of Science and Technology, Thuwal 23955-6900, Kingdom of Saudi Arabia
| | - Anton V Malko
- Department of Physics, The University of Texas at Dallas, Richardson, Texas 75080, United States
| | - Omar F Mohammed
- Division of Physical Sciences and Engineering, King Abdullah University of Science and Technology, Thuwal 23955-6900, Kingdom of Saudi Arabia
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99966
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Mo WC, Yu J, Gao LZ, Liu Y, Wei Y, He RQ. Reversible Inhibition of Iron Oxide Nanozyme by Guanidine Chloride. Front Chem 2020; 8:491. [PMID: 32596209 PMCID: PMC7301555 DOI: 10.3389/fchem.2020.00491] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/27/2019] [Accepted: 05/12/2020] [Indexed: 11/13/2022] Open
Abstract
Nanozymes have been widely applied in bio-assays in the field of biotechnology and biomedicines. However, the physicochemical basis of nanozyme catalytic activity remains elusive. To test whether nanozymes exhibit an inactivation effect similar to that of natural enzymes, we used guanidine chloride (GuHCl) to disturb the iron oxide nanozyme (IONzyme) and observed that GuHCl induced IONzyme aggregation and that the peroxidase-like activity of IONzyme significantly decreased in the presence of GuHCl. However, the aggregation appeared to be unrelated to the quick process of inactivation, as GuHCl acted as a reversible inhibitor of IONzyme instead of a solo denaturant. Inhibition kinetic analysis showed that GuHCl binds to IONzyme competitively with H2O2 but non-competitively with tetramethylbenzidine. In addition, electron spin resonance spectroscopy showed that increasing GuHCl level of GuHCl induced a correlated pattern of changes in the activity and the state of the unpaired electrons of the IONzymes. This result indicates that GuHCl probably directly interacts with the iron atoms of IONzyme and affects the electron density of iron, which may then induce IONzyme inactivation. These findings not only contribute to understanding the essence of nanozyme catalytic activity but also suggest a practically feasible method to regulate the catalytic activity of IONzyme.
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Affiliation(s)
- Wei-Chuan Mo
- State Key Laboratory of Brain and Cognitive Sciences, Institute of Biophysics, University of the Chinese Academy of Sciences, CAS, Beijing, China
| | - Jia Yu
- State Key Laboratory of Brain and Cognitive Sciences, Institute of Biophysics, University of the Chinese Academy of Sciences, CAS, Beijing, China
| | - Li-Zeng Gao
- CAS Engineering Laboratory for Nanozyme, Institute of Biophysics Key Laboratory of Protein and Peptide Drugs, Institute of Biophysics, CAS, Yangzhou, China
| | - Ying Liu
- State Key Laboratory of Brain and Cognitive Sciences, Institute of Biophysics, University of the Chinese Academy of Sciences, CAS, Beijing, China.,School of Life Sciences, Beijing University of Chinese Medicine, Beijing, China
| | - Yan Wei
- State Key Laboratory of Brain and Cognitive Sciences, Institute of Biophysics, University of the Chinese Academy of Sciences, CAS, Beijing, China.,CAS Key Laboratory of Mental Health Laboratory, Institute of Psychology, Beijing, China
| | - Rong-Qiao He
- State Key Laboratory of Brain and Cognitive Sciences, Institute of Biophysics, University of the Chinese Academy of Sciences, CAS, Beijing, China.,Southwest Medical University, Luzhou, China
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99967
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Zhang Z, Wen K, Zhang C, Laroche F, Wang Z, Zhou Q, Liu Z, Abrahams JP, Zhou X. Extracellular Nanovesicle Enhanced Gene Transfection Using Polyethyleneimine in HEK293T Cells and Zebrafish Embryos. Front Bioeng Biotechnol 2020; 8:448. [PMID: 32596214 PMCID: PMC7300290 DOI: 10.3389/fbioe.2020.00448] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/12/2019] [Accepted: 04/17/2020] [Indexed: 01/24/2023] Open
Abstract
It is a hot topic to improve efficiency and decrease toxicity of gene transfection reagents. The extracellular nanovesicles (EVs) that are released by cells play an important role in intercellular communication and are naturally designed for genetic exchange between cells. Here, we show that the EVs have a large beneficial effect in polyethyleneimine (PEI)-mediated transfection of a GFP-encoding plasmid into HEK293T cells. An improvement of transfection efficiency of ~500% and a decrease in toxicity were observed in a specific concentration range of PEI. The EVs also greatly improved the transfection of the same plasmid into zebrafish embryos. To verify the generality of this gene transfection approach, we also tested the cell viability and gene transfection efficiency using two other plasmids (EpTEN and ELuc) and in another cell line (A549). The measured increase in transfection efficiency makes EV a promising candidate for enhancement of the quality of current PEI-based transfection technique.
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Affiliation(s)
- Zhenzhen Zhang
- Department of Science, China Pharmaceutical University, Nanjing, China
- Institute of Veterinary Medicine, Jiangsu Academy of Agricultural Sciences, Nanjing, China
| | - Kai Wen
- Department of Science, China Pharmaceutical University, Nanjing, China
| | - Chao Zhang
- School of Traditional Chinese Pharmacy, China Pharmaceutical University, Nanjing, China
| | - Fabrice Laroche
- Centre for Carbohydrate Recognition and Signalling, Department of Molecular Biology and Genetics, Aarhus University, Aarhus, Denmark
| | - Zhenglong Wang
- Department of Science, China Pharmaceutical University, Nanjing, China
| | - Qiang Zhou
- Department of Orthopaedics, Tianjin First Central Hospital, Nankai University, Tianjin, China
| | - Zunfeng Liu
- State Key Laboratory of Medicinal Chemical Biology, Key Laboratory of Functional Polymer Materials, College of Pharmacy, Nankai University, Tianjin, China
| | | | - Xiang Zhou
- Department of Science, China Pharmaceutical University, Nanjing, China
- State Key Laboratory of Medicinal Chemical Biology, Key Laboratory of Functional Polymer Materials, College of Pharmacy, Nankai University, Tianjin, China
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99968
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Affiliation(s)
- Karthik Nagarajan
- K. Nagarajan, Prof. S. B. ChenDepartment of Chemical & Biomolecular EngineeringNational University of Singapore Singapore 117585 Singapore
| | - Shing Bor Chen
- K. Nagarajan, Prof. S. B. ChenDepartment of Chemical & Biomolecular EngineeringNational University of Singapore Singapore 117585 Singapore
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99969
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Ou Z, Zhong H, Zhang L, Deng M, Zhang W, Wang J, Feng H, Gong J, Miao C, Yi Z. Macrophage Membrane-Coated Nanoparticles Alleviate Hepatic Ischemia-Reperfusion Injury Caused by Orthotopic Liver Transplantation by Neutralizing Endotoxin. Int J Nanomedicine 2020; 15:4125-4138. [PMID: 32606668 PMCID: PMC7296981 DOI: 10.2147/ijn.s253125] [Citation(s) in RCA: 29] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/09/2020] [Accepted: 05/19/2020] [Indexed: 01/01/2023] Open
Abstract
Purpose To investigate the effect and mechanism of macrophage membrane-coated nanoparticles (M-NPs) on hepatic ischemia-reperfusion injury (I/RI) caused by orthotopic liver transplantation. In addition, the advantages of TLR4+/M-NPs compared to M-NPs are discussed. Materials and Methods We prepared biomimetic M-NPs and identified their characteristics. M-NPs were injected into an SD rat model of orthotopic liver transplantation, and the anti-inflammatory and anti-I/RI activities of M-NPs were studied in vivo and in vitro. In addition, we overexpressed macrophage membrane Toll-like receptor 4 (TLR4) in vitro and prepared TLR4+/M-NPs. Then, we assessed the characteristics and advantages of TLR4+/M-NPs. Results The M-NPs neutralized endotoxin, inhibited the overactivation of Kupffer cells (KCs) and suppressed the secretion of inflammatory factors by inhibiting the endotoxin-mediated TLR4/MyD88/IRAK1/NF-κB signaling pathway. In an orthotopic liver transplantation model in SD rats, M-NPs showed significant therapeutic efficacy by neutralizing endotoxin and suppressing the secretion of inflammatory factors. Moreover, overexpression of TLR4 on the macrophage membrane by using a TLR4+-plasmid in vitro effectively reduced the amount of M-NPs needed to neutralize an equivalent dose of endotoxin, reducing the potential risks of NP overuse. Conclusion This study indicates that M-NPs can effectively alleviate I/RI induced by liver transplantation.
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Affiliation(s)
- Zhibing Ou
- Department of Hepatobiliary Surgery, Chenzhou No.1 People's Hospital, Chenzhou, Hunan 410000, People's Republic of China
| | - Hua Zhong
- Department of Hepatobiliary Surgery, The Second Affiliated Hospital of Chongqing Medical University, Chongqing 40000, People's Republic of China
| | - Liang Zhang
- Department of Hepatobiliary Surgery, The Second Affiliated Hospital of Chongqing Medical University, Chongqing 40000, People's Republic of China.,Institute of Ultrasound Imaging, Department of Ultrasound, The Second Affiliated Hospital of Chongqing Medical University, Chongqing 40000, People's Republic of China
| | - Minghua Deng
- Department of Hepatobiliary Surgery, The Second Affiliated Hospital of Chongqing Medical University, Chongqing 40000, People's Republic of China
| | - Wenfeng Zhang
- Department of Hepatobiliary Surgery, The Second Affiliated Hospital of Chongqing Medical University, Chongqing 40000, People's Republic of China
| | - Jingyuan Wang
- Department of Hepatobiliary Surgery, The Second Affiliated Hospital of Chongqing Medical University, Chongqing 40000, People's Republic of China
| | - Huaguo Feng
- Department of Hepatobiliary Surgery, The Second Affiliated Hospital of Chongqing Medical University, Chongqing 40000, People's Republic of China
| | - Jianping Gong
- Department of Hepatobiliary Surgery, The Second Affiliated Hospital of Chongqing Medical University, Chongqing 40000, People's Republic of China
| | - Chunmu Miao
- Department of Hepatobiliary Surgery, The Second Affiliated Hospital of Chongqing Medical University, Chongqing 40000, People's Republic of China
| | - Zhujun Yi
- Department of Hepatobiliary Surgery, The Second Affiliated Hospital of Chongqing Medical University, Chongqing 40000, People's Republic of China
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99970
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Bista D, Chauhan V, Sengupta T, Reber AC, Khanna SN. A ligand-induced homojunction between aluminum-based superatomic clusters. NANOSCALE 2020; 12:12046-12056. [PMID: 32469025 DOI: 10.1039/d0nr02611e] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
A superatomic molecule formed by joining two metallic clusters linked by an organometallic bridge can behave like a semiconductor and the addition of ligands can induce a significant energy level shift across an inter-cluster homojunction. This shift is induced by the N-ethyl-2-pyrrolidone ligands, and the placement of the ligands strongly affects the direction of the dipole moment, including the case where the dipole moment is parallel to the cluster interface. This computational study provides an alternative strategy for constructing nanometer-scale electronic interfaces between clusters mimicking semiconductor motifs. The semiconducting features in the PAl12 clusters emerge from the grouping of the quantum states in a confined nearly free electron gas that creates a substantial energy gap. An organometallic Ge(CH3)2(CH2)2 bridge links the clusters while maintaining the cluster's electronic shell structure. The amount of level shifting between the bridged clusters can be changed by controlling the number of ligands. Attaching multiple ligands can result in a broken gap energy alignment in which the HOMO level of one cluster is aligned with the LUMO level of the other bridged cluster. Furthermore, the singly ligated bridged superatomic molecule is found to exhibit promising features to separate the electron-hole pairs for photovoltaic applications.
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Affiliation(s)
- Dinesh Bista
- Department of Physics, Virginia Commonwealth University, Richmond, VA 23284-2000, USA.
| | - Vikas Chauhan
- Ramjas College, University of Delhi, Delhi-110007, India
| | - Turbasu Sengupta
- Department of Physics, Virginia Commonwealth University, Richmond, VA 23284-2000, USA.
| | - Arthur C Reber
- Department of Physics, Virginia Commonwealth University, Richmond, VA 23284-2000, USA.
| | - Shiv N Khanna
- Department of Physics, Virginia Commonwealth University, Richmond, VA 23284-2000, USA.
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99971
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Jeong J, Chun J, Lim WG, Kim WB, Jo C, Lee J. Mesoporous carbon host material for stable lithium metal anode. NANOSCALE 2020; 12:11818-11824. [PMID: 32458877 DOI: 10.1039/d0nr02258f] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
Lithium (Li) metal is a promising anode material for next-generation batteries because of its low standard reduction potential (-3.04 V vs. SHE) and high specific capacity (3860 mA h g-1). However, it is still challenging to directly use Li metal as anode material in commercial batteries because of unstable Li dendrite formation and accumulated solid-electrolyte interphase. Possible methods that can suppress the unwanted formation of Li dendrites are (i) by increasing the electrode surface area and (ii) formation of porosity for confining Li. Here, we tested microporous (<2 nm) carbon and mesoporous (2-50 nm) carbon as host materials for the Li metal anode to avoid their degradation during cycling of lithium metal batteries (LMBs). Mesoporous carbon was more effective than microporous carbon as a host material to confine the Li metal and the lifetime of mesoporous carbon was more than twice as long as those of the Cu foil and microporous carbon. After confirmed better anode performance of mesoporous carbon host material, we applied Li-plated mesoporous carbon as an anode in a lithium-sulfur battery (Li-S) full cell. This research work suggests that mesopores, in spite of their low specific surface area, are better than micropores in stabilizing the Li metal and that a mesoporous host material can be applied to Li metal anodes for use in next-generation battery applications.
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Affiliation(s)
- Jooyoung Jeong
- Department of Chemical and Biomolecular Engineering, Korea Advanced Institute of Science and Technology (KAIST), 291 Daehak-ro, Yuseong-gu, Daejeon 34141, Republic of Korea. and Department of Chemical Engineering, Pohang University of Science and Technology (POSTECH), 77 Cheongam-ro, Nam-gu, Pohang 37673, Republic of Korea
| | - Jinyoung Chun
- Korea Institute of Ceramic Engineering and Technology (KICET), 101 Soho-ro, Jinju 52851, Republic of Korea
| | - Won-Gwang Lim
- Department of Chemical and Biomolecular Engineering, Korea Advanced Institute of Science and Technology (KAIST), 291 Daehak-ro, Yuseong-gu, Daejeon 34141, Republic of Korea. and Department of Chemical Engineering, Pohang University of Science and Technology (POSTECH), 77 Cheongam-ro, Nam-gu, Pohang 37673, Republic of Korea
| | - Won Bae Kim
- Department of Chemical Engineering, Pohang University of Science and Technology (POSTECH), 77 Cheongam-ro, Nam-gu, Pohang 37673, Republic of Korea
| | - Changshin Jo
- School of Chemical Engineering & Materials Science, Chung-Ang University (CAU), 84 Heukseok-ro, Dongjak-gu, Seoul, 06974, Republic of Korea.
| | - Jinwoo Lee
- Department of Chemical and Biomolecular Engineering, Korea Advanced Institute of Science and Technology (KAIST), 291 Daehak-ro, Yuseong-gu, Daejeon 34141, Republic of Korea.
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99972
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Fu X, Lin X, Ren X, Wu R, Liu C, Huang J. The synthesis and structure of the [PdAu 13(PPh 3) 3(SR) 7] + nanocluster. NANOSCALE 2020; 12:11825-11829. [PMID: 32458944 DOI: 10.1039/d0nr01356k] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
Metal alloy nanoclusters have attracted increasing attention due to the synergistic effect of the foreign atoms. For the first time the synthesis and crystal structure of the [PdAu13(PPh3)3(SR)7]+ nanocluster is reported. The crystal structure of the nanocluster was determined by single crystal X-ray diffraction. The [PdAu13(PPh3)3(SR)7]+ nanocluster has a concave polyhedron Au9Pd kernel, which looks like a girl dancing ballet. The structure shows that [PdAu13(PPh3)3(SR)7]+ has an open shell. Meanwhile, we also carried out ultraviolet-visible (Uv-vis) absorption spectroscopy and fluorescence spectroscopy to study the optical properties of the [PdAu13(PPh3)3(SR)7]+ nanocluster.
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Affiliation(s)
- Xuemei Fu
- Gold Catalysis Research Center, State Key Laboratory of Catalysis, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, China. and Dalian National Laboratory for Clean Energy, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, China and University of Chinese Academy of Sciences, Beijing 100049, China
| | - Xinzhang Lin
- Gold Catalysis Research Center, State Key Laboratory of Catalysis, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, China. and Dalian National Laboratory for Clean Energy, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, China and University of Chinese Academy of Sciences, Beijing 100049, China
| | - Xiuqing Ren
- Gold Catalysis Research Center, State Key Laboratory of Catalysis, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, China. and Dalian National Laboratory for Clean Energy, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, China
| | - Ren'an Wu
- Laboratory of High-Resolution Mass Spectrometry Technologies, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, China
| | - Chao Liu
- Gold Catalysis Research Center, State Key Laboratory of Catalysis, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, China. and Dalian National Laboratory for Clean Energy, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, China
| | - Jiahui Huang
- Gold Catalysis Research Center, State Key Laboratory of Catalysis, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, China. and Dalian National Laboratory for Clean Energy, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, China
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99973
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Zhang Y, Kuwahara Y, Mori K, Louis C, Yamashita H. Hybrid phase 1T/2H-MoS 2 with controllable 1T concentration and its promoted hydrogen evolution reaction. NANOSCALE 2020; 12:11908-11915. [PMID: 32467961 DOI: 10.1039/d0nr02525a] [Citation(s) in RCA: 18] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/13/2023]
Abstract
MoS2 has been investigated as a low-cost alternative to Pt in the electrochemical hydrogen evolution reaction. One of the promising methods to further activate MoS2 is phase engineering. MoS2 generally exhibits two kinds of crystalline phases: hexagonal 2H phase and octahedral 1T phase. 1T-MoS2 exhibits much better chemical/physical properties than natural semiconductor 2H-MoS2. However, 1T-MoS2 is metastable and its synthesis is still a challenge. Hybrid 1T/2H-MoS2 has been synthesized under relatively mild conditions, but controlling the 1T/2H ratio is still an issue which has not been discussed in detail. In this study, the synthesis methods of hybrid phase 1T/2H-MoS2 with controllable 1T concentration are investigated. The electrochemical hydrogen evolution reaction is then evaluated for 1T/2H-MoS2 with different 1T concentrations by performing both experiments and theoretical calculations.
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Affiliation(s)
- Yuxiao Zhang
- Division of Materials and Manufacturing Science, Graduate School of Engineering, Osaka University, 2-1 Yamada-oka, Suita, Osaka 565-0871, Japan.
| | - Yasutaka Kuwahara
- Division of Materials and Manufacturing Science, Graduate School of Engineering, Osaka University, 2-1 Yamada-oka, Suita, Osaka 565-0871, Japan. and Unit of Elements Strategy Initiative for Catalysts & Batteries (ESICB), Kyoto University, Katsura, Kyoto 565-0871, Japan and JST, PRESTO, 4-1-8 Hon-Cho, Kawaguchi, Saitama 332-0012, Japan
| | - Kohsuke Mori
- Division of Materials and Manufacturing Science, Graduate School of Engineering, Osaka University, 2-1 Yamada-oka, Suita, Osaka 565-0871, Japan. and Unit of Elements Strategy Initiative for Catalysts & Batteries (ESICB), Kyoto University, Katsura, Kyoto 565-0871, Japan
| | - Catherine Louis
- Sorbonne Universités, UPMC Univ Paris 06, UMR CNRS 7197, Laboratoire de Réactivité de Surface, 4 Place Jussieu, Tour 43-33, 3ème étage, Case 178, F-75252 Paris, France
| | - Hiromi Yamashita
- Division of Materials and Manufacturing Science, Graduate School of Engineering, Osaka University, 2-1 Yamada-oka, Suita, Osaka 565-0871, Japan. and Unit of Elements Strategy Initiative for Catalysts & Batteries (ESICB), Kyoto University, Katsura, Kyoto 565-0871, Japan
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99974
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A Commercial Carbonaceous Anode with a-Si Layers by Plasma Enhanced Chemical Vapor Deposition for Lithium Ion Batteries. JOURNAL OF COMPOSITES SCIENCE 2020. [DOI: 10.3390/jcs4020072] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
In this study, we propose a mass production-able and low-cost method to fabricate the anodes of Li-ion battery. Carbonaceous anodes, integrated with thin amorphous silicon layers by plasma enhanced chemical vapor deposition, can improve the performance of specific capacity and coulombic efficiency for Li-ion battery. Three different thicknesses of a-Si layers (320, 640, and 960 nm), less than 0.1 wt% of anode electrode, were deposited on carbonaceous electrodes at low temperature 200 °C. Around 30 mg of a-Si by plasma enhanced chemical vapor deposition (PECVD) can improve the specific capacity ~42%, and keep coulombic efficiency of the half Li-ion cells higher than 85% after first cycle charge-discharge test. For the thirty cyclic performance and rate capability, capacitance retention can maintain above 96%. The thicker a-Si layers on carbon anodes, the better electrochemical performance of anodes with silicon-carbon composites we get. The traditional carbonaceous electrodes can be deposited a-Si layers easily by plasma enhanced chemical vapor deposition, which is a method with high potential for industrialization.
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99975
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Kim H, Kyhm K, Taylor RA, Kim JS, Song JD, Park S. Optical shaping of the polarization anisotropy in a laterally coupled quantum dot dimer. LIGHT, SCIENCE & APPLICATIONS 2020; 9:100. [PMID: 32566170 PMCID: PMC7286917 DOI: 10.1038/s41377-020-0339-3] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 08/17/2019] [Revised: 05/27/2020] [Accepted: 06/01/2020] [Indexed: 06/11/2023]
Abstract
We find that the emission from laterally coupled quantum dots is strongly polarized along the coupled direction [11 ¯ 0], and its polarization anisotropy can be shaped by changing the orientation of the polarized excitation. When the nonresonant excitation is linearly polarized perpendicular to the coupled direction [110], excitons (X1 and X2) and local biexcitons (X1X1 and X2X2) from the two separate quantum dots (QD1 and QD2) show emission anisotropy with a small degree of polarization (10%). On the other hand, when the excitation polarization is parallel to the coupled direction [11 ¯ 0], the polarization anisotropy of excitons, local biexcitons, and coupled biexcitons (X1X2) is enhanced with a degree of polarization of 74%. We also observed a consistent anisotropy in the time-resolved photoluminescence. The decay rate of the polarized photoluminescence intensity along the coupled direction is relatively high, but the anisotropic decay rate can be modified by changing the orientation of the polarized excitation. An energy difference is also observed between the polarized emission spectra parallel and perpendicular to the coupled direction, and it increases by up to three times by changing the excitation polarization orientation from [110] to [11 ¯ 0]. These results suggest that the dipole-dipole interaction across the two separate quantum dots is mediated and that the anisotropic wavefunctions of the excitons and biexcitons are shaped by the excitation polarization.
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Affiliation(s)
- Heedae Kim
- School of Physics, Northeast Normal University, 130024 Changchun, China
- Clarendon Laboratory, Department of Physics, University of Oxford, Oxford, OX1 3PU UK
| | - Kwangseuk Kyhm
- Department of Opto-mechatronics, Pusan Nat’l University, Busan, 609-735 Republic of Korea
| | - Robert A. Taylor
- Clarendon Laboratory, Department of Physics, University of Oxford, Oxford, OX1 3PU UK
| | - Jong Su Kim
- Department of Physics, Yeungnam University, Gyeongsan, 712-749 Republic of Korea
| | - Jin Dong Song
- Nano-Photonics Research Center, KIST, Seoul, 136-791 Republic of Korea
| | - Sungkyun Park
- Department of Physics, Pusan Nat’l University, Busan, 609-735 Republic of Korea
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99976
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Abstract
Background Enthusiasm for the use of metal nanoparticles in human and veterinary medicine is high. Many articles describe the effects of metal nanoparticles on microbes in vitro, and a smaller number of articles describe effects on the immune system, which is the focus of this review. Methods Articles were retrieved by performing literature searches in Medline, of the National Institute of Medicine, as well as via Google Scholar. Results In vitro studies show that metal nanoparticles have antimicrobial effects. Some metal nanoparticles augment innate host immune defenses, such as endogenous antimicrobial peptides, and nitric oxide. Metal nanoparticles may also function as vaccine adjuvants. Metal nanoparticles can migrate to locations distant from the site of administration, however, requiring careful monitoring for toxicity. Conclusions Metal nanoparticles show a great deal of potential as immunomodulators, as well as direct antimicrobial effects. Before metal particles can be adopted as therapies; however, more studies are needed to determine how nanoparticles migrate though the body and on possible adverse effects.
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Affiliation(s)
- John K Crane
- Division of Infectious Diseases, University at Buffalo , Buffalo, New York, USA
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99977
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Kohyama S, Fujiwara K, Yoshinaga N, Doi N. Conformational equilibrium of MinE regulates the allowable concentration ranges of a protein wave for cell division. NANOSCALE 2020; 12:11960-11970. [PMID: 32458918 DOI: 10.1039/d0nr00242a] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
The Min system for determining the cell division position at the center in bacteria has a unique character that uses a protein wave (Min wave) that emerges from its components (MinD and MinE). The Min wave emerges under the coupling of chemical reactions and molecular diffusions of MinDE and appears when the concentrations of MinD and MinE are similar. However, the nanoscale mechanism to determine their concentration ranges has remained elusive. In this study, by using artificial cells as a mimic of cells, we showed that the dominant MinE conformations determined the allowable concentration ranges for the emergence of the Min wave. Furthermore, the deletion of the membrane-binding region of MinE indicated that the region was essential for limiting the concentration ranges to be narrower. These findings illustrate a parameter tuning mechanism underlying complex molecular systems at the nanoscale for spatiotemporal regulation in living cells and show a possibility that the regulation of the equilibrium among molecular conformations can work as a switch for cell division.
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Affiliation(s)
- Shunshi Kohyama
- Department of Biosciences & Informatics, Keio University, 3-14-1 Hiyoshi, Kohoku-ku, Yokohama 223-8522, Japan.
| | - Kei Fujiwara
- Department of Biosciences & Informatics, Keio University, 3-14-1 Hiyoshi, Kohoku-ku, Yokohama 223-8522, Japan.
| | - Natsuhiko Yoshinaga
- Mathematical Science Group, WPI Advanced Institute for Materials Research (WPI-AIMR), Tohoku University, Katahira 2-1-1, Aoba-Ku, Sendai 9808577, Japan and MathAM-OIL, AIST, Sendai 980-8577, Japan
| | - Nobuhide Doi
- Department of Biosciences & Informatics, Keio University, 3-14-1 Hiyoshi, Kohoku-ku, Yokohama 223-8522, Japan.
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99978
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Ali MA, Ahmed T, Wu W, Hossain A, Hafeez R, Islam Masum MM, Wang Y, An Q, Sun G, Li B. Advancements in Plant and Microbe-Based Synthesis of Metallic Nanoparticles and Their Antimicrobial Activity against Plant Pathogens. NANOMATERIALS (BASEL, SWITZERLAND) 2020; 10:E1146. [PMID: 32545239 PMCID: PMC7353409 DOI: 10.3390/nano10061146] [Citation(s) in RCA: 79] [Impact Index Per Article: 19.8] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/08/2020] [Revised: 05/31/2020] [Accepted: 06/04/2020] [Indexed: 02/02/2023]
Abstract
A large number of metallic nanoparticles have been successfully synthesized by using different plant extracts and microbes including bacteria, fungi viruses and microalgae. Some of these metallic nanoparticles showed strong antimicrobial activities against phytopathogens. Here, we summarized these green-synthesized nanoparticles from plants and microbes and their applications in the control of plant pathogens. We also discussed the potential deleterious effects of the metallic nanoparticles on plants and beneficial microbial communities associated with plants. Overall, this review calls for attention regarding the use of green-synthesized metallic nanoparticles in controlling plant diseases and clarification of the risks to plants, plant-associated microbial communities, and environments before using them in agriculture.
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Affiliation(s)
- Md. Arshad Ali
- State Key Laboratory of Rice Biology and Ministry of Agriculture Key Lab of Molecular Biology of Crop Pathogens and Insects, Institute of Biotechnology, College of Agricultural and Biotechnology, Zhejiang University, Hangzhou 310058, China; (M.A.A.); (T.A.); (A.H.); (R.H.); (Q.A.)
| | - Temoor Ahmed
- State Key Laboratory of Rice Biology and Ministry of Agriculture Key Lab of Molecular Biology of Crop Pathogens and Insects, Institute of Biotechnology, College of Agricultural and Biotechnology, Zhejiang University, Hangzhou 310058, China; (M.A.A.); (T.A.); (A.H.); (R.H.); (Q.A.)
| | - Wenge Wu
- Rice Research Institute, Anhui Academy of Agricultural Sciences, Hefei 230001, China
| | - Afsana Hossain
- State Key Laboratory of Rice Biology and Ministry of Agriculture Key Lab of Molecular Biology of Crop Pathogens and Insects, Institute of Biotechnology, College of Agricultural and Biotechnology, Zhejiang University, Hangzhou 310058, China; (M.A.A.); (T.A.); (A.H.); (R.H.); (Q.A.)
- Department of Plant Pathology and Seed Science, Sylhet Agricultural University, Sylhet 3100, Bangladesh
| | - Rahila Hafeez
- State Key Laboratory of Rice Biology and Ministry of Agriculture Key Lab of Molecular Biology of Crop Pathogens and Insects, Institute of Biotechnology, College of Agricultural and Biotechnology, Zhejiang University, Hangzhou 310058, China; (M.A.A.); (T.A.); (A.H.); (R.H.); (Q.A.)
| | - Md. Mahidul Islam Masum
- Department of Plant Pathology, Bangabandhu Sheikh Mujibur Rahman Agricultural University, Gazipur 1706, Bangladesh;
| | - Yanli Wang
- State Key Laboratory for Managing Biotic and Chemical Threats to the Quality and Safety of Agro-Products, Zhejiang Academy of Agricultural Sciences, Hangzhou 310021, China;
| | - Qianli An
- State Key Laboratory of Rice Biology and Ministry of Agriculture Key Lab of Molecular Biology of Crop Pathogens and Insects, Institute of Biotechnology, College of Agricultural and Biotechnology, Zhejiang University, Hangzhou 310058, China; (M.A.A.); (T.A.); (A.H.); (R.H.); (Q.A.)
| | - Guochang Sun
- State Key Laboratory for Managing Biotic and Chemical Threats to the Quality and Safety of Agro-Products, Zhejiang Academy of Agricultural Sciences, Hangzhou 310021, China;
| | - Bin Li
- State Key Laboratory of Rice Biology and Ministry of Agriculture Key Lab of Molecular Biology of Crop Pathogens and Insects, Institute of Biotechnology, College of Agricultural and Biotechnology, Zhejiang University, Hangzhou 310058, China; (M.A.A.); (T.A.); (A.H.); (R.H.); (Q.A.)
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99979
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Raslan A, Saenz del Burgo L, Espona-Noguera A, Ochoa de Retana AM, Sanjuán ML, Cañibano-Hernández A, Gálvez-Martín P, Ciriza J, Pedraz JL. BSA- and Elastin-Coated GO, but Not Collagen-Coated GO, Enhance the Biological Performance of Alginate Hydrogels. Pharmaceutics 2020; 12:E543. [PMID: 32545286 PMCID: PMC7355931 DOI: 10.3390/pharmaceutics12060543] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/20/2020] [Revised: 06/05/2020] [Accepted: 06/08/2020] [Indexed: 11/17/2022] Open
Abstract
The use of embedded cells within alginate matrices is a developing technique with great clinical applications in cell-based therapies. However, one feature that needs additional investigation is the improvement of alginate-cells viability, which could be achieved by integrating other materials with alginate to improve its surface properties. In recent years, the field of nanotechnology has shown the many properties of a huge number of materials. Graphene oxide (GO), for instance, seems to be a good choice for improving alginate cell viability and functionality. We previously observed that GO, coated with fetal bovine serum (FBS) within alginate hydrogels, improves the viability of embedded myoblasts. In the current research, we aim to study several proteins, specifically bovine serum albumin (BSA), type I collagen and elastin, to discern their impact on the previously observed improvement on embedded myoblasts within alginate hydrogels containing GO coated with FBS. Thus, we describe the mechanisms of the formation of BSA, collagen and elastin protein layers on the GO surface, showing a high adsorption by BSA and elastin, and a decreasing GO impedance and capacitance. Moreover, we described a better cell viability and protein release from embedded cells within hydrogels containing protein-coated GO. We conclude that these hybrid hydrogels could provide a step forward in regenerative medicine.
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Affiliation(s)
- Ahmed Raslan
- NanoBioCel Group, Laboratory of Pharmacy and Pharmaceutical Technology, Faculty of Pharmacy, University of the Basque Country UPV/EHU, 01006 Vitoria-Gasteiz, Spain; (A.R.); (L.S.d.B.); (A.E.-N.); (A.C.-H.)
- Biomedical Research Networking Center in Bioengineering, Biomaterials, and Nanomedicine, CIBER-BBN, 28029 Madrid, Spain
| | - Laura Saenz del Burgo
- NanoBioCel Group, Laboratory of Pharmacy and Pharmaceutical Technology, Faculty of Pharmacy, University of the Basque Country UPV/EHU, 01006 Vitoria-Gasteiz, Spain; (A.R.); (L.S.d.B.); (A.E.-N.); (A.C.-H.)
- Biomedical Research Networking Center in Bioengineering, Biomaterials, and Nanomedicine, CIBER-BBN, 28029 Madrid, Spain
| | - Albert Espona-Noguera
- NanoBioCel Group, Laboratory of Pharmacy and Pharmaceutical Technology, Faculty of Pharmacy, University of the Basque Country UPV/EHU, 01006 Vitoria-Gasteiz, Spain; (A.R.); (L.S.d.B.); (A.E.-N.); (A.C.-H.)
- Biomedical Research Networking Center in Bioengineering, Biomaterials, and Nanomedicine, CIBER-BBN, 28029 Madrid, Spain
| | - Ana María Ochoa de Retana
- Department of Organic Chemistry I, Faculty of Pharmacy and Lascaray Research Center, University of the Basque Country (UPV/EHU), Paseo de la Universidad 7, 01006 Vitoria, Spain;
| | - María Luisa Sanjuán
- Instituto de Ciencia de Materiales de Aragón (Universidad de Zaragoza-CSIC), Facultad de Ciencias, 50009 Zaragoza, Spain;
| | - Alberto Cañibano-Hernández
- NanoBioCel Group, Laboratory of Pharmacy and Pharmaceutical Technology, Faculty of Pharmacy, University of the Basque Country UPV/EHU, 01006 Vitoria-Gasteiz, Spain; (A.R.); (L.S.d.B.); (A.E.-N.); (A.C.-H.)
- Biomedical Research Networking Center in Bioengineering, Biomaterials, and Nanomedicine, CIBER-BBN, 28029 Madrid, Spain
| | | | - Jesús Ciriza
- NanoBioCel Group, Laboratory of Pharmacy and Pharmaceutical Technology, Faculty of Pharmacy, University of the Basque Country UPV/EHU, 01006 Vitoria-Gasteiz, Spain; (A.R.); (L.S.d.B.); (A.E.-N.); (A.C.-H.)
- Biomedical Research Networking Center in Bioengineering, Biomaterials, and Nanomedicine, CIBER-BBN, 28029 Madrid, Spain
| | - Jose Luis Pedraz
- NanoBioCel Group, Laboratory of Pharmacy and Pharmaceutical Technology, Faculty of Pharmacy, University of the Basque Country UPV/EHU, 01006 Vitoria-Gasteiz, Spain; (A.R.); (L.S.d.B.); (A.E.-N.); (A.C.-H.)
- Biomedical Research Networking Center in Bioengineering, Biomaterials, and Nanomedicine, CIBER-BBN, 28029 Madrid, Spain
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99980
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Moniruzzaman M, Anantha Lakshmi B, Kim S, Kim J. Preparation of shape-specific (trilateral and quadrilateral) carbon quantum dots towards multiple color emission. NANOSCALE 2020; 12:11947-11959. [PMID: 32458861 DOI: 10.1039/d0nr02225j] [Citation(s) in RCA: 21] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
Little progress has been achieved relating to the preparation of shape-specific carbon quantum dots (CQDs) with a well-ordered edge structure and multi-color fluorescence from a single precursor by monitoring and controlling the reaction time. Selecting phloroglucinol (having suitable three-fold symmetry, C3h; symmetry elements: E, C3, C32, σh, S3, S3-1) as a precursor of CQDs is useful for monitoring the shape and structure of CQDs during dehydration mediated controlled growth, which assists to better focus on their formation and PL emission mechanism. We report the rapid synthesis of novel shape-specific (trilateral and quadrilateral) CQDs with multi-color fluorescence emission [blue (B-CQDs), green (G-CQDs), and yellow (Y-CQDs)] by controlling the reaction time. The mechanism of controlled bottom-up growth involves six-membered ring cyclization of the single precursor (phloroglucinol) through the elimination of neighboring active -OH and -H groups in a sulfuric acid medium. Interestingly, wide-range multi-color fluorescence emission of non-nitrogenous CQDs is achieved based on solvatochromism. We consider that the evolution of the tunable photoluminescence (PL) emission can be attributed to both the size of the conjugated domain and oxygen-/sulfur-containing edge electronic states. Furthermore, the multi-color fluorescence CQDs are successfully used as propitious fluorescent probes for multi-color cell (HeLa) and zebra fish larvae imaging owing to an effective intracellular distribution and good biocompatibility.
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Affiliation(s)
- Md Moniruzzaman
- Department of Chemical and Biological Engineering, Gachon University, Seongnam 1342, Seongnam-daero, Seongnam-si, Gyeonggi-do 13120, Republic of Korea.
| | - Buddolla Anantha Lakshmi
- Department of Bio-nanotechnology, Gachon University, Seongnam-Si, Gyeonggi-Do 13120, Republic of Korea
| | - Sanghyo Kim
- Department of Bio-nanotechnology, Gachon University, Seongnam-Si, Gyeonggi-Do 13120, Republic of Korea
| | - Jongsung Kim
- Department of Chemical and Biological Engineering, Gachon University, Seongnam 1342, Seongnam-daero, Seongnam-si, Gyeonggi-do 13120, Republic of Korea.
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99981
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He H, Zheng H, Ma M, Shi Y, Gao Z, Chen S, Wang X. Peripheral groups of polyhedral oligomeric silsesquioxane (POSS) core-based dendrimers: a crucial factor for higher-level supra-architecture building. NANOSCALE 2020; 12:12146-12153. [PMID: 32490499 DOI: 10.1039/d0nr03216f] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
The role of peripheral groups (PGs) on dendrimers in the spontaneous higher-level organization of hierarchically assembled nanofibers was investigated in a series of POSS-based dendritic gelators (POSS-Lys-X, X: -Boc, -Cbz, -Fmoc, etc.). We demonstrate that the PGs not only affect the gelation ability in solutions, but also the construction of orderly entangled fibrous supramolecular networks, e.g., "loofah-like" networks. Attributed to the PGs (especially the -Boc group) causing a lower cooperative assembly, the steady state with the lowest potential energy of gelators can be easily achieved by the higher ordering of nanofiber entanglement into superstructures. The -Boc group-containing dendrimers show low molar enthalpy and molar entropy of gelation, which help the construction of unique three-dimensional (3D) "loofah-like" superstructures. In contrast, the high cooperative assembly of the dendrimer (-Cbz as the PG) promotes the gelator into a higher enthalpy gelation process, with a constructed normal fibrous network. Hence, the PGs of POSS-based dendrimers act as the crucial factor in controlling the hierarchical self-assembly via a thermodynamics approach. This research presents new perspectives to explicate the relationships between PGs of dendrimers, supra-architectures and gel performances, which further guide the design of functional supramolecular materials via controllable self-assembly.
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Affiliation(s)
- Huiwen He
- College of Materials Science and Engineering, Zhejiang University of Technology, 18 Chaowang Road, Hangzhou 310014, China. and College of mechanical Engineering, Zhejiang University of Technology, 288 Liuhe Road, Hangzhou 310000, China
| | - Hao Zheng
- College of Materials Science and Engineering, Zhejiang University of Technology, 18 Chaowang Road, Hangzhou 310014, China.
| | - Meng Ma
- College of Materials Science and Engineering, Zhejiang University of Technology, 18 Chaowang Road, Hangzhou 310014, China.
| | - Yanqing Shi
- College of Materials Science and Engineering, Zhejiang University of Technology, 18 Chaowang Road, Hangzhou 310014, China.
| | - Zengliang Gao
- College of mechanical Engineering, Zhejiang University of Technology, 288 Liuhe Road, Hangzhou 310000, China
| | - Si Chen
- College of Materials Science and Engineering, Zhejiang University of Technology, 18 Chaowang Road, Hangzhou 310014, China.
| | - Xu Wang
- College of Materials Science and Engineering, Zhejiang University of Technology, 18 Chaowang Road, Hangzhou 310014, China.
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99982
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Targeted Delivery of Mesenchymal Stem Cell-Derived Nanovesicles for Spinal Cord Injury Treatment. Int J Mol Sci 2020; 21:ijms21114185. [PMID: 32545361 PMCID: PMC7312698 DOI: 10.3390/ijms21114185] [Citation(s) in RCA: 41] [Impact Index Per Article: 10.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/14/2020] [Revised: 06/04/2020] [Accepted: 06/08/2020] [Indexed: 02/07/2023] Open
Abstract
Due to the safety issues and poor engraftment of mesenchymal stem cell (MSC) implantation, MSC-derived exosomes have been spotlighted as an alternative therapy for spinal cord injury (SCI). However, insufficient productivity of exosomes limits their therapeutic potential for clinical application. Moreover, low targeting ability of unmodified exosomes is a critical obstacle for their further applications as a therapeutic agent. In the present study, we fabricated macrophage membrane-fused exosome-mimetic nanovesicles (MF-NVs) from macrophage membrane-fused umbilical cord blood-derived MSCs (MF-MSCs) and confirmed their therapeutic potential in a clinically relevant mouse SCI model (controlled mechanical compression injury model). MF-NVs contained larger quantity of ischemic region-targeting molecules compared to normal MSC-derived nanovesicles (N-NVs). The targeting molecules in MF-NVs, which were derived from macrophage membranes, increased the accumulation of MF-NVs in the injured spinal cord after the in vivo systemic injection. Increased accumulation of MF-NVs attenuated apoptosis and inflammation, prevented axonal loss, enhanced blood vessel formation, decreased fibrosis, and consequently, improved spinal cord function. Synthetically, we developed targeting efficiency-potentiated exosome-mimetic nanovesicles and present their possibility of clinical application for SCI.
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99983
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Santra TS, Kar S, Chen TC, Chen CW, Borana J, Lee MC, Tseng FG. Near-infrared nanosecond-pulsed laser-activated highly efficient intracellular delivery mediated by nano-corrugated mushroom-shaped gold-coated polystyrene nanoparticles. NANOSCALE 2020; 12:12057-12067. [PMID: 32469040 DOI: 10.1039/d0nr01792b] [Citation(s) in RCA: 27] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/04/2023]
Abstract
Here, an efficient intracellular delivery of molecules with high cell viability is reported using nanosecond-pulsed laser-activated plasmonic photoporation, mediated by high-aspect-ratio nano-corrugated mushroom-shaped gold-coated polystyrene nanoparticles (nm-AuPNPs) at near-infrared wavelength. Upon pulsed laser illumination, nm-AuPNPs exhibit greater plasmonic extinction than spherical AuPNPs, which increase their energy efficiency and reduce the necessary illumination of light, effectively controlling cell damage and improving the delivery efficiency. Nm-AuPNPs exhibit surface plasmon absorption at near infrared region with a peak at 945 nm. Pulsed laser illumination at this plasmon peak triggers explosive nanobubbles, which create transient membrane pores, allowing the delivery of dyes, quantum dots and plasmids into the different cell types. The results can be tuned by laser fluence, exposure time, molecular size and concentration of nm-AuPNPs. The best results are found for CL1-0 cells, which yielded a 94% intracellular PI dye uptake and ∼100% cell viability at 35 mJ cm-2 laser fluence for 945 nm wavelength. Thus, the presented approach has proven to have an inevitable potential for biological cell research and therapeutic applications.
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Affiliation(s)
- Tuhin Subhra Santra
- Department of Engineering Design, Indian Institute of Technology Madras, India.
| | - Srabani Kar
- Electrical Engineering Division, University of Cambridge, CB3 0FA, Cambridge, UK
| | - Te-Chang Chen
- Institute of Photonics Technology, National Tsing Hua University, Taiwan
| | - Chih-Wei Chen
- Institute of Molecular Medicine, National Tsing Hua University, Taiwan
| | - Jayant Borana
- Department of Engineering and System Science, National Tsing Hua University, Taiwan.
| | - Ming-Chang Lee
- Institute of Photonics Technology, National Tsing Hua University, Taiwan and Department of Electrical Engineering, National Tsing Hua University, Taiwan
| | - Fan-Gang Tseng
- Department of Engineering and System Science, National Tsing Hua University, Taiwan. and Institute of Nanoengineering and Microsystems, National Tsing Hua University, Taiwan and Division of Mechanics, Research Center for Applied Sciences, Academia Sinica, Taiwan
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99984
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Zhu J, Zhu Y, Huang J, Hou L, Shen J, Li C. Synthesis of monodisperse water-stable surface Pb-rich CsPbCl 3 nanocrystals for efficient photocatalytic CO 2 reduction. NANOSCALE 2020; 12:11842-11846. [PMID: 32469035 DOI: 10.1039/d0nr02917c] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
Surface Pb-rich lead halide (CsPbCl3) perovskite nanocrystals (NCs) with high stability and monodispersity in water have been synthesized using a general and convenient liquid-solid interpenetration (LSI) method. In this process, water molecules permeate into the solid CsPbCl3 NC layers and slowly dissolve the Cs+ and Cl- ions on the surface of CsPbCl3 NCs. The Cs+ and Cl- ions in water inhibit the decomposition rate of CsPbCl3 NCs, inducing surface Pb-rich layers. The surface Pb-rich structure increases the photoluminescence (PL) lifetimes and improves the photocatalytic performances of lead halide perovskite NCs. Under simulated solar irradiation, the largest rate of CO2 photoreduction from surface Pb-rich Ni-doped CsPbCl3 NCs reaches up to 169.37 μmol g-1 h-1. This study provides an effective general strategy to design stable lead halide perovskite quantum dots (QDs) for their wide applications.
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Affiliation(s)
- Jingrun Zhu
- Key Laboratory for Ultrafine Materials of Ministry of Education; Shanghai Engineering Research Center of Hierarchical Nanomaterials; School of Materials Science and Engineering, East China University of Science and Technology, Shanghai 200237, China
| | - Yihua Zhu
- Key Laboratory for Ultrafine Materials of Ministry of Education; Shanghai Engineering Research Center of Hierarchical Nanomaterials; School of Materials Science and Engineering, East China University of Science and Technology, Shanghai 200237, China
| | - Jianfei Huang
- Center for Polymers and Organic Solids, Department of Chemistry and Biochemistry University of California, Santa Barbara, CA 93106, USA
| | - Lu Hou
- Key Laboratory for Ultrafine Materials of Ministry of Education; Shanghai Engineering Research Center of Hierarchical Nanomaterials; School of Materials Science and Engineering, East China University of Science and Technology, Shanghai 200237, China
| | - Jianhua Shen
- Key Laboratory for Ultrafine Materials of Ministry of Education; Shanghai Engineering Research Center of Hierarchical Nanomaterials; School of Materials Science and Engineering, East China University of Science and Technology, Shanghai 200237, China
| | - Chunzhong Li
- Key Laboratory for Ultrafine Materials of Ministry of Education; Shanghai Engineering Research Center of Hierarchical Nanomaterials; School of Materials Science and Engineering, East China University of Science and Technology, Shanghai 200237, China and School of Chemical Engineering, East China University of Science and Technology, Shanghai 200237, China
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99985
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Qiu Y, Song B, Pezzato C, Shen D, Liu W, Zhang L, Feng Y, Guo QH, Cai K, Li W, Chen H, Nguyen MT, Shi Y, Cheng C, Astumian RD, Li X, Stoddart JF. A precise polyrotaxane synthesizer. Science 2020; 368:1247-1253. [PMID: 32527831 DOI: 10.1126/science.abb3962] [Citation(s) in RCA: 116] [Impact Index Per Article: 29.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/20/2020] [Revised: 04/05/2020] [Accepted: 04/27/2020] [Indexed: 01/22/2023]
Abstract
Mechanically interlocked molecules are likely candidates for the design and synthesis of artificial molecular machines. Although polyrotaxanes have already found niche applications in exotic materials with specialized mechanical properties, efficient synthetic protocols to produce them with precise numbers of rings encircling their polymer dumbbells are still lacking. We report the assembly line-like emergence of poly[n]rotaxanes with increasingly higher energies by harnessing artificial molecular pumps to deliver rings in pairs by cyclical redox-driven processes. This programmable strategy leads to the precise incorporation of two, four, six, eight, and 10 rings carrying 8+, 16+, 24+, 32+, and 40+ charges, respectively, onto hexacationic polymer dumbbells. This strategy depends precisely on the number of redox cycles applied chemically or electrochemically, in both stepwise and one-pot manners.
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Affiliation(s)
- Yunyan Qiu
- Department of Chemistry, Northwestern University, Evanston, IL 60208, USA
| | - Bo Song
- Department of Chemistry, Northwestern University, Evanston, IL 60208, USA.,Department of Chemistry, University of South Florida, Tampa, FL 33620, USA
| | - Cristian Pezzato
- Department of Chemistry, Northwestern University, Evanston, IL 60208, USA
| | - Dengke Shen
- Department of Chemistry, Northwestern University, Evanston, IL 60208, USA
| | - Wenqi Liu
- Department of Chemistry, Northwestern University, Evanston, IL 60208, USA
| | - Long Zhang
- Department of Chemistry, Northwestern University, Evanston, IL 60208, USA
| | - Yuanning Feng
- Department of Chemistry, Northwestern University, Evanston, IL 60208, USA
| | - Qing-Hui Guo
- Department of Chemistry, Northwestern University, Evanston, IL 60208, USA
| | - Kang Cai
- Department of Chemistry, Northwestern University, Evanston, IL 60208, USA
| | - Weixingyue Li
- Department of Chemistry, Northwestern University, Evanston, IL 60208, USA
| | - Hongliang Chen
- Department of Chemistry, Northwestern University, Evanston, IL 60208, USA
| | - Minh T Nguyen
- Department of Chemistry, Northwestern University, Evanston, IL 60208, USA
| | - Yi Shi
- Department of Chemistry, Northwestern University, Evanston, IL 60208, USA
| | - Chuyang Cheng
- Department of Chemistry, Northwestern University, Evanston, IL 60208, USA
| | - R Dean Astumian
- Department of Physics, University of Maine, Orono, ME 04469, USA.
| | - Xiaopeng Li
- Department of Chemistry, University of South Florida, Tampa, FL 33620, USA.
| | - J Fraser Stoddart
- Department of Chemistry, Northwestern University, Evanston, IL 60208, USA. .,Institute for Molecular Design and Synthesis, Tianjin University, Tianjin 300072, P. R. China.,School of Chemistry, University of New South Wales, Sydney, NSW 2052, Australia
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99986
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Wang Y, Armato U, Wu J. Targeting Tunable Physical Properties of Materials for Chronic Wound Care. Front Bioeng Biotechnol 2020; 8:584. [PMID: 32596229 PMCID: PMC7300298 DOI: 10.3389/fbioe.2020.00584] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/19/2020] [Accepted: 05/13/2020] [Indexed: 12/12/2022] Open
Abstract
Chronic wounds caused by infections, diabetes, and radiation exposures are becoming a worldwide growing medical burden. Recent progress highlighted the physical signals determining stem cell fates and bacterial resistance, which holds potential to achieve a better wound regeneration in situ. Nanoparticles (NPs) would benefit chronic wound healing. However, the cytotoxicity of the silver NPs (AgNPs) has aroused many concerns. This review targets the tunable physical properties (i.e., mechanical-, structural-, and size-related properties) of either dermal matrixes or wound dressings for chronic wound care. Firstly, we discuss the recent discoveries about the mechanical- and structural-related regulation of stem cells. Specially, we point out the currently undocumented influence of tunable mechanical and structural properties on either the fate of each cell type or the whole wound healing process. Secondly, we highlight novel dermal matrixes based on either natural tropoelastin or synthetic elastin-like recombinamers (ELRs) for providing elastic recoil and resilience to the wounded dermis. Thirdly, we discuss the application of wound dressings in terms of size-related properties (i.e., metal NPs, lipid NPs, polymeric NPs). Moreover, we highlight the cytotoxicity of AgNPs and propose the size-, dose-, and time-dependent solutions for reducing their cytotoxicity in wound care. This review will hopefully inspire the advanced design strategies of either dermal matrixes or wound dressings and their potential therapeutic benefits for chronic wounds.
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Affiliation(s)
- Yuzhen Wang
- Research Center for Tissue Repair and Regeneration Affiliated to the Medical Innovation Research Department and 4th Medical Center, PLA General Hospital and PLA Medical College, Beijing, China
- PLA Key Laboratory of Tissue Repair and Regenerative Medicine and Beijing Key Research Laboratory of Skin Injury, Repair and Regeneration, Beijing, China
- Research Unit of Trauma Care, Tissue Repair and Regeneration, Chinese Academy of Medical Sciences, 2019RU051, Beijing, China
- Department of Burn and Plastic Surgery, Air Force Hospital of PLA Central Theater Command, Datong, China
| | - Ubaldo Armato
- Histology and Embryology Section, Department of Surgery, Dentistry, Pediatrics and Gynecology, University of Verona Medical School Verona, Verona, Italy
- Department of Burn and Plastic Surgery, Second People's Hospital of Shenzhen, Shenzhen University, Shenzhen, China
| | - Jun Wu
- Department of Burn and Plastic Surgery, Second People's Hospital of Shenzhen, Shenzhen University, Shenzhen, China
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99987
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Chong Y, Huang J, Xu X, Yu C, Ning X, Fan S, Zhang Z. Hyaluronic Acid-Modified Au-Ag Alloy Nanoparticles for Radiation/Nanozyme/Ag + Multimodal Synergistically Enhanced Cancer Therapy. Bioconjug Chem 2020; 31:1756-1765. [PMID: 32463680 DOI: 10.1021/acs.bioconjchem.0c00224] [Citation(s) in RCA: 30] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
Gold nanoparticles (AuNPs) have been widely documented as tumor radiosensitizers via enhanced energy deposition of ionizing radiation. However, the sensitization efficiency of AuNPs is still far from satisfactory owing to the irradiation on nontarget tissues and the tumor radio-resistance. To address these issues, we report herein the rational design and development of hyaluronic acid-modified Au-Ag alloy nanoparticles (Au-Ag@HA NPs) with effective tumor radiosensitization by receptor mediated tumor targeting as well as microenvironment-activated hydroxyl radicals (•OH) generation. In our work, Au-Ag@HA NPs were synthesized by the coreduction of HAuCl4 and AgNO3 in the presence of trisodium citrate, followed by surface modification of HA to the Au-Ag alloy NPs. HA modification affords the alloy NPs with specific targeting to 4T1 breast cancer cells overexpressing CD44 receptor, while the introduction of Ag atom imparts the alloy NPs with superior multienzyme-like activities to the monometallic AuNPs for efficient tumor catalytic therapy. More importantly, the ionizing radiation and peroxidase-like activity of Au-Ag@HA NPs boost the production of •OH and the release of toxic Ag+ in the tumor sites, thereby leading to effective tumor therapeutic outcome. This work provides a promising treatment paradigm for radiation/nanozyme/Ag+ combined therapy against cancer and will advance the design and development of multifunctional nanoplatforms for synergetically enhanced tumor therapy.
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Affiliation(s)
- Yu Chong
- State Key Laboratory of Radiation Medicine and Protection, School for Radiological and interdisciplinary Sciences (RAD-X), and Collaborative Innovation Center of Radiation Medicine of Jiangsu Higher Education Institutions, Soochow University, Suzhou, 215123, China.,CAS Key Laboratory of Nano-Bio Interface, Division of Nanobiomedicine, Suzhou Institute of Nano-Tech and Nano-Bionics, Chinese Academy of Sciences, Suzhou, 215123, China
| | - Jie Huang
- CAS Key Laboratory of Nano-Bio Interface, Division of Nanobiomedicine, Suzhou Institute of Nano-Tech and Nano-Bionics, Chinese Academy of Sciences, Suzhou, 215123, China
| | - Xiaoyu Xu
- CAS Key Laboratory of Nano-Bio Interface, Division of Nanobiomedicine, Suzhou Institute of Nano-Tech and Nano-Bionics, Chinese Academy of Sciences, Suzhou, 215123, China
| | - Chenggong Yu
- CAS Key Laboratory of Nano-Bio Interface, Division of Nanobiomedicine, Suzhou Institute of Nano-Tech and Nano-Bionics, Chinese Academy of Sciences, Suzhou, 215123, China
| | - Xingyu Ning
- CAS Key Laboratory of Nano-Bio Interface, Division of Nanobiomedicine, Suzhou Institute of Nano-Tech and Nano-Bionics, Chinese Academy of Sciences, Suzhou, 215123, China
| | - Saijun Fan
- Tianjin Key Laboratory of Radiation Medicine and Molecular Nuclear Medicine, Institute of Radiation Medicine, Chinese Academy of Medical Science/Peking Union Medical College, Tianjin, 300192, China
| | - Zhijun Zhang
- CAS Key Laboratory of Nano-Bio Interface, Division of Nanobiomedicine, Suzhou Institute of Nano-Tech and Nano-Bionics, Chinese Academy of Sciences, Suzhou, 215123, China
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99988
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Potential of Flavonoid-Inspired Phytomedicines against COVID-19. Molecules 2020; 25:molecules25112707. [PMID: 32545268 PMCID: PMC7321405 DOI: 10.3390/molecules25112707] [Citation(s) in RCA: 95] [Impact Index Per Article: 23.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/19/2020] [Revised: 06/03/2020] [Accepted: 06/05/2020] [Indexed: 01/08/2023] Open
Abstract
Flavonoids are widely used as phytomedicines. Here, we report on flavonoid phytomedicines with potential for development into prophylactics or therapeutics against coronavirus disease 2019 (COVID-19). These flavonoid-based phytomedicines include: caflanone, Equivir, hesperetin, myricetin, and Linebacker. Our in silico studies show that these flavonoid-based molecules can bind with high affinity to the spike protein, helicase, and protease sites on the ACE2 receptor used by the severe acute respiratory syndrome coronavirus 2 to infect cells and cause COVID-19. Meanwhile, in vitro studies show potential of caflanone to inhibit virus entry factors including, ABL-2, cathepsin L, cytokines (IL-1β, IL-6, IL-8, Mip-1α, TNF-α), and PI4Kiiiβ as well as AXL-2, which facilitates mother-to-fetus transmission of coronavirus. The potential for the use of smart drug delivery technologies like nanoparticle drones loaded with these phytomedicines to overcome bioavailability limitations and improve therapeutic efficacy are discussed.
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99989
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Lee S, Lee K. pH-Sensitive Folic Acid Conjugated Alginate Nanoparticle for Induction of Cancer-Specific Fluorescence Imaging. Pharmaceutics 2020; 12:E537. [PMID: 32545164 PMCID: PMC7355973 DOI: 10.3390/pharmaceutics12060537] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/14/2020] [Revised: 06/04/2020] [Accepted: 06/09/2020] [Indexed: 12/21/2022] Open
Abstract
In cancer nanomedicine, numerous studies have been conducted on the surface modification and transport capacity of nanoparticles (NPs); however, biological barriers, such as enzymatic degradation or non-specific delivery during circulation, remain to be cleared. Herein, we developed pH-sensitive NPs that degrade in an acidic environment and release 5-aminolevulinic acid (5ALA) to the target site. NPs were prepared by conjugating alginate with folic acid, followed by encapsulation of 5ALA through a water-in-oil (W/O) emulsion method. The alginate-conjugated folic acid nanoparticles (AF NPs) were homogeneous in size, stable for a long time in aqueous suspension without aggregation, and non-toxic. AF NPs were small enough to efficiently infiltrate tumors (<50 nm) and were specifically internalized by cancer cells through receptor-mediated endocytosis. After the intracellular absorption of NPs, alginate was deprotonated in the lysosomes and released 5ALA, which was converted to protoporphyrin IX (PpIX) through mitochondrial heme synthesis. Our study outcomes demonstrated that AF NPs were not degraded by enzymes or other external factors before reaching cancer cells, and fluorescent precursors were specifically and accurately delivered to cancer cells to generate fluorescence.
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Affiliation(s)
| | - Kangwon Lee
- Department of Transdisciplinary Studies, Graduate School of Convergence Science and Technology, Seoul National University, Seoul 08826, Korea;
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99990
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Ma RS, Ma J, Yan J, Wu L, Guo W, Wang S, Huan Q, Bao L, Pantelides ST, Gao HJ. Wrinkle-induced highly conductive channels in graphene on SiO 2/Si substrates. NANOSCALE 2020; 12:12038-12045. [PMID: 32469037 DOI: 10.1039/d0nr01406k] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
A graphene wrinkle is a quasi-one-dimensional structure and can alter the intrinsic physical and chemical activity, modify the band structure and introduce transport anisotropy in graphene thin films. However, the quasi-one-dimensional electrical transport contribution of wrinkles to the whole graphene films compared to that of the two-dimensional flat graphene nearby has still been elusive. Here, we report measurements of relatively high conductivity in micrometer-wide graphene wrinkles on SiO2/Si substrates using an ultrahigh vacuum (UHV) four-probe scanning tunneling microscope. Combining the experimental results with resistor network simulations, the wrinkle conductivity at the charge neutrality point shows a much higher conductivity up to ∼33.6 times compared to that of the flat monolayer region. The high conductivity can be attributed not only to the wrinkled multilayer structure but also to the large strain gradients located mainly in the boundary area. This method can also be extended to evaluate the electrical-transport properties of wrinkled structures in other two-dimensional materials.
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Affiliation(s)
- Rui-Song Ma
- Institute of Physics, Chinese Academy of Sciences, PO Box 603, Beijing 100190, People's Republic of China. and University of Chinese Academy of Sciences & CAS Center for Excellence in Topological Quantum Computation, Chinese Academy of Sciences, PO Box 603, Beijing 100190, People's Republic of China
| | - Jiajun Ma
- Institute of Physics, Chinese Academy of Sciences, PO Box 603, Beijing 100190, People's Republic of China. and University of Chinese Academy of Sciences & CAS Center for Excellence in Topological Quantum Computation, Chinese Academy of Sciences, PO Box 603, Beijing 100190, People's Republic of China
| | - Jiahao Yan
- Institute of Physics, Chinese Academy of Sciences, PO Box 603, Beijing 100190, People's Republic of China. and University of Chinese Academy of Sciences & CAS Center for Excellence in Topological Quantum Computation, Chinese Academy of Sciences, PO Box 603, Beijing 100190, People's Republic of China
| | - Liangmei Wu
- Institute of Physics, Chinese Academy of Sciences, PO Box 603, Beijing 100190, People's Republic of China. and University of Chinese Academy of Sciences & CAS Center for Excellence in Topological Quantum Computation, Chinese Academy of Sciences, PO Box 603, Beijing 100190, People's Republic of China
| | - Wei Guo
- Key Laboratory of Material Chemistry for Energy Conversion and Storage, Ministry of Education, School of Chemistry and Chemical Engineering, Huazhong University of Science and Technology, Wuhan, 430074, People's Republic of China
| | - Shuai Wang
- Key Laboratory of Material Chemistry for Energy Conversion and Storage, Ministry of Education, School of Chemistry and Chemical Engineering, Huazhong University of Science and Technology, Wuhan, 430074, People's Republic of China
| | - Qing Huan
- Institute of Physics, Chinese Academy of Sciences, PO Box 603, Beijing 100190, People's Republic of China. and University of Chinese Academy of Sciences & CAS Center for Excellence in Topological Quantum Computation, Chinese Academy of Sciences, PO Box 603, Beijing 100190, People's Republic of China
| | - Lihong Bao
- Institute of Physics, Chinese Academy of Sciences, PO Box 603, Beijing 100190, People's Republic of China. and University of Chinese Academy of Sciences & CAS Center for Excellence in Topological Quantum Computation, Chinese Academy of Sciences, PO Box 603, Beijing 100190, People's Republic of China and Songshan Lake Materials Laboratory, Dongguan, Guangdong 523808, People's Republic of China
| | - Sokrates T Pantelides
- University of Chinese Academy of Sciences & CAS Center for Excellence in Topological Quantum Computation, Chinese Academy of Sciences, PO Box 603, Beijing 100190, People's Republic of China and Department of Physics and Astronomy and Department of Electrical Engineering and Computer Science, Vanderbilt University, Nashville, Tennessee 37235, USA
| | - Hong-Jun Gao
- Institute of Physics, Chinese Academy of Sciences, PO Box 603, Beijing 100190, People's Republic of China. and University of Chinese Academy of Sciences & CAS Center for Excellence in Topological Quantum Computation, Chinese Academy of Sciences, PO Box 603, Beijing 100190, People's Republic of China and Songshan Lake Materials Laboratory, Dongguan, Guangdong 523808, People's Republic of China
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99991
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Pakharukova VP, Yatsenko DA, Gerasimov EY, Vlasova E, Bukhtiyarova GA, Tsybulya SV. Total Scattering Debye Function Analysis: Effective Approach for Structural Studies of Supported MoS 2-Based Hydrotreating Catalysts. Ind Eng Chem Res 2020. [DOI: 10.1021/acs.iecr.0c01254] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Vera P. Pakharukova
- Boreskov Institute of Catalysis SB RAS, Pr. Lavrentieva 5, 630090 Novosibirsk, Russia
- Novosibirsk State University, Pirogova Street 2, 630090 Novosibirsk, Russia
| | - Dmitry A. Yatsenko
- Boreskov Institute of Catalysis SB RAS, Pr. Lavrentieva 5, 630090 Novosibirsk, Russia
- Novosibirsk State University, Pirogova Street 2, 630090 Novosibirsk, Russia
| | - Evgeny Yu Gerasimov
- Boreskov Institute of Catalysis SB RAS, Pr. Lavrentieva 5, 630090 Novosibirsk, Russia
- Novosibirsk State University, Pirogova Street 2, 630090 Novosibirsk, Russia
| | - Evgenia Vlasova
- Boreskov Institute of Catalysis SB RAS, Pr. Lavrentieva 5, 630090 Novosibirsk, Russia
| | | | - Sergey V. Tsybulya
- Boreskov Institute of Catalysis SB RAS, Pr. Lavrentieva 5, 630090 Novosibirsk, Russia
- Novosibirsk State University, Pirogova Street 2, 630090 Novosibirsk, Russia
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99992
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MOYNIHAN EOIN, ROST STEFAN, O'CONNELL EOGHAN, RAMASSE QUENTIN, FRIEDRICH CHRISTOPH, BANGERT URSEL. Plasmons in MoS
2
studied via experimental and theoretical correlation of energy loss spectra. J Microsc 2020; 279:256-264. [DOI: 10.1111/jmi.12900] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/01/2019] [Revised: 02/21/2020] [Accepted: 05/08/2020] [Indexed: 11/30/2022]
Affiliation(s)
- EOIN MOYNIHAN
- TEMUL, Department of PhysicsSchool of Sciences & Bernal Institute, University of Limerick Limerick Ireland
| | - STEFAN ROST
- Peter Grünberg Institut and Institute for Advanced Simulation Forschungszentrum Jülich and JARAGermany and RWTH Aachen University Aachen Germany
| | - EOGHAN O'CONNELL
- TEMUL, Department of PhysicsSchool of Sciences & Bernal Institute, University of Limerick Limerick Ireland
| | | | - CHRISTOPH FRIEDRICH
- Peter Grünberg Institut and Institute for Advanced Simulation Forschungszentrum Jülich and JARA Jülich Germany
| | - URSEL BANGERT
- TEMUL, Department of PhysicsSchool of Sciences & Bernal Institute, University of Limerick Limerick Ireland
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99993
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Dong Q, Zhou F, Jiang J, Xu WL, Behera D, Sengupta B, Yu M. Advanced Functional Hierarchical Nanoporous Structures with Tunable Microporous Coatings Formed via an Interfacial Reaction Processing. ACS APPLIED MATERIALS & INTERFACES 2020; 12:26360-26366. [PMID: 32419448 DOI: 10.1021/acsami.0c05310] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
It is challenging, but constructing hierarchical nanoporous structures with microporous coatings for various important applications, such as entrapment of homogeneous catalysts, size/shape selective catalysis, and so forth, is an urgent need. Moreover, microporous inorganic coatings are particularly desirable because of their excellent stability in organic solvents and at elevated temperatures and pressures. In this study, we design a novel liquid phase interfacial reaction process to form a defect-free, hybrid coating, which can be subsequently converted into microporous coatings, with tunable pore size, on nanoporous materials. As an example to entrap functional materials, tetrakis(triphenylphosphine) palladium (Pd(PPh3)4) was in situ synthesized in the mesoporous channels and encapsulated by the microporous coating shell. The encapsulated Pd(PPh3)4 catalyst exhibited negligible Pd leaching, providing a promising solution for the challenging catalyst separation problem in homogeneous catalysis. These results suggest that this novel strategy might be an effective way of forming microporous inorganic coatings on nanoporous materials for entrapping functional materials for wide applications.
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Affiliation(s)
- Qiaobei Dong
- Department of Chemical & Biological Engineering, Rensselaer Polytechnic Institute, Troy, New York 12180, United States
| | - Fanglei Zhou
- Department of Chemical & Biological Engineering, Rensselaer Polytechnic Institute, Troy, New York 12180, United States
| | - Ji Jiang
- Department of Chemical & Biological Engineering, Rensselaer Polytechnic Institute, Troy, New York 12180, United States
| | - Weiwei L Xu
- Department of Chemical & Biological Engineering, Rensselaer Polytechnic Institute, Troy, New York 12180, United States
| | - Dinesh Behera
- Department of Chemical & Biological Engineering, Rensselaer Polytechnic Institute, Troy, New York 12180, United States
| | - Bratin Sengupta
- Department of Chemical & Biological Engineering, Rensselaer Polytechnic Institute, Troy, New York 12180, United States
| | - Miao Yu
- Department of Chemical & Biological Engineering, Rensselaer Polytechnic Institute, Troy, New York 12180, United States
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99994
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Zhou C, Chen W, Yang S, Ou Q, Gan Z, Bao Q, Jia B, Wen X. Determining In-Plane Carrier Diffusion in Two-Dimensional Perovskite Using Local Time-Resolved Photoluminescence. ACS APPLIED MATERIALS & INTERFACES 2020; 12:26384-26390. [PMID: 32400152 DOI: 10.1021/acsami.0c05539] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
The diffusion length of photogenerated carriers is a crucial parameter in semiconductors for optoelectronic applications. However, it is a challenging task to determine the diffusion length in layered nanoplatelets due to their anisotropic diffusion of photogenerated carriers and nanometer-thin thickness. Here, we demonstrate a novel method to determine the in-plane diffusion length of photogenerated carriers in layered nanoplatelets using local time-resolved photoluminescence. Also, the in-plane carrier diffusion length of 1.82 μm is obtained for an exfoliated (BA)2PbI4 (BA = CH3(CH2)3NH3) perovskite nanoplatelet. This method is particularly useful for weak luminescent materials and the materials that are easily damaged by long-term laser beam because of the high detection sensitivity. This technique is extendable to other layered materials and therefore plays a valuable role in the development and optimization of two-dimensional (2D) and three-dimensional (3D) semiconductor materials and devices for photovoltaic and photonic applications.
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Affiliation(s)
- Chunhua Zhou
- Centre for Translational Atomaterials, Faculty of Science, Engineering and Technology, Swinburne University of Technology, John Street, Hawthorn, Melbourne, Victoria 3122, Australia
| | - Weijian Chen
- Centre for Translational Atomaterials, Faculty of Science, Engineering and Technology, Swinburne University of Technology, John Street, Hawthorn, Melbourne, Victoria 3122, Australia
| | - Shuang Yang
- School of Materials Science and Engineering, Shandong University, Jinan, Shandong 250100, China
| | - Qingdong Ou
- Department of Materials Science and Engineering, and ARC Centre of Excellence in Future Low-Energy Electronics Technologies (FLEET), Monash University, Scenic Blvd & Wellington Road, Clayton, Victoria 3800, Australia
| | - Zhixing Gan
- Key Laboratory of Optoelectronic Technology of Jiangsu Province, School of Physics and Technology, Nanjing Normal University, Nanjing 210023, China
| | - Qiaoliang Bao
- Department of Materials Science and Engineering, and ARC Centre of Excellence in Future Low-Energy Electronics Technologies (FLEET), Monash University, Scenic Blvd & Wellington Road, Clayton, Victoria 3800, Australia
| | - Baohua Jia
- Centre for Translational Atomaterials, Faculty of Science, Engineering and Technology, Swinburne University of Technology, John Street, Hawthorn, Melbourne, Victoria 3122, Australia
| | - Xiaoming Wen
- Centre for Translational Atomaterials, Faculty of Science, Engineering and Technology, Swinburne University of Technology, John Street, Hawthorn, Melbourne, Victoria 3122, Australia
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99995
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Narimani M, Yalameha S, Nourbakhsh Z. High thermoelectric efficiency of LaX (X = Sb, Bi) two dimensional topological insulators. JOURNAL OF PHYSICS. CONDENSED MATTER : AN INSTITUTE OF PHYSICS JOURNAL 2020; 32:255501. [PMID: 32209738 DOI: 10.1088/1361-648x/ab6046] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
Topological insulators with novel surfaces or edge states are the topological nature sequel of bulk electronic wave functions of these materials. The observed signatures in the electronic structure of topological insulators can make them excellent candidates for thermoelectric materials. Low dimensional materials such as phosphorene and Bi2Te3 nanowire have been confirmed to be desirable for the design of devices with high thermoelectric performance. So in this work, the phonon modes, formation energy and cohesive energy of LaX (X = Sb, Bi) monolayers are first calculated and investigated. Then the band order of these monolayers is investigated by the band structure calculations and the topological phase of these monolayers is proved by using the calculation of Z 2 topological invariant. The energy band gap and the band inversion strength of these monolayers are evaluated under in-plane strains. Also, the effect of different temperatures and in-plane strains on the thermoelectric performance of LaX monolayers is studied. The results show the high thermoelectric efficiency and d-p topological band inversion of these monolayers under compressive strains.
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99996
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Hu X, Zhao Y, Shen X, Krasheninnikov AV, Chen Z, Sun L. Enhanced Ferromagnetism and Tunable Magnetism in Fe 3GeTe 2 Monolayer by Strain Engineering. ACS APPLIED MATERIALS & INTERFACES 2020; 12:26367-26373. [PMID: 32408732 DOI: 10.1021/acsami.0c05530] [Citation(s) in RCA: 31] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
Recent discovery of intrinsic ferromagnetism in Fe3GeTe2 (FGT) monolayer [Deng, Y.; Nature 2018, 563, 94-99; Fei, Z.; Nat. Mater. 2018, 17, 778-782] not only extended the family of two-dimensional (2D) magnetic materials but also stimulated further interest in the possibility to tune their magnetic properties without changing the chemical composition or introducing defects. By means of density functional theory computations, we explore strain effects on the magnetic properties of the FGT monolayer. We demonstrate that the ferromagnetism can be largely enhanced by the tensile strain in the FGT monolayer due to the competitive effects of direct exchange and superexchange interaction. The average magnetic moments of Fe atoms increase monotonically with an increase in biaxial strain from -5 to 5% in FGT monolayer. The intriguing variation of magnetic moments with strain in the FGT monolayer is related to the charge transfer induced by the changes in the bond lengths. Given the successful fabrication of the FGT monolayer, the strain-tunable ferromagnetism in the FGT monolayer can stimulate the experimental effort in this field. This work also suggests an effective route to control the magnetic properties of the FGT monolayer. The pronounced magnetic response toward the biaxial strain can be used to design the magnetomechanical coupling spintronics devices based on FGT.
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Affiliation(s)
- Xiaohui Hu
- College of Materials Science and Engineering, Nanjing Tech University, Nanjing 211816, China
- Jiangsu Collaborative Innovation Center for Advanced Inorganic Function Composites, Nanjing Tech University, Nanjing 211816, China
| | - Yinghe Zhao
- Department of Chemistry, University of Puerto Rico, Rio Piedras Campus, San Juan 00931, Puerto Rico
| | - Xiaodong Shen
- College of Materials Science and Engineering, Nanjing Tech University, Nanjing 211816, China
- Jiangsu Collaborative Innovation Center for Advanced Inorganic Function Composites, Nanjing Tech University, Nanjing 211816, China
| | - Arkady V Krasheninnikov
- Institute of Ion Beam Physics and Materials Research, Helmholtz-Zentrum Dresden-Rossendorf, 01314 Dresden, Germany
- Department of Applied Physics, Aalto University School of Science, PO Box 11100, 00076 Aalto, Finland
| | - Zhongfang Chen
- Department of Chemistry, University of Puerto Rico, Rio Piedras Campus, San Juan 00931, Puerto Rico
| | - Litao Sun
- SEU-FEI Nano-Pico Center, Key Laboratory of MEMS of Ministry of Education, Collaborative Innovation Center for Micro/Nano Fabrication, Device and System, Southeast University, Nanjing 210096, China
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99997
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Fardian-Melamed N, Katrivas L, Eidelshtein G, Rotem D, Kotlyar A, Porath D. Electronic Level Structure of Silver-Intercalated Cytosine Nanowires. NANO LETTERS 2020; 20:4505-4511. [PMID: 32412760 DOI: 10.1021/acs.nanolett.0c01292] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
Metal-mediated base-paired DNA has long been investigated for basic scientific pursuit and for nanoelectronics purposes. Particularly attractive in these domains is the Ag+-intercalated polycytosine DNA duplex. Extensive studies of this molecule have led to our current understanding of its self-assembly properties, high thermodynamic and structural stability, and high longitudinal conductivity. However, a high-resolution morphological characterization of long Ag+-intercalated polycytosine DNA has hitherto not been carried out. Furthermore, the electronic level structure of this molecule has not been studied before. Here we present a scanning tunneling microscopy and spectroscopy study of this intriguing nanowire. Its temperature-independent morphological and electronic properties suggest substantial stability, while its emergent electronic levels and energy gap provide the basis for its high conductivity.
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Affiliation(s)
- Natalie Fardian-Melamed
- Institute of Chemistry and Center for Nanoscience and Nanotechnology, The Hebrew University of Jerusalem, Jerusalem 91904, Israel
| | - Liat Katrivas
- Department of Biochemistry and Molecular Biology, George S. Wise Faculty of Life Sciences, and The Center of Nanoscience and Nanotechnology, Tel Aviv University, Ramat Aviv, Tel Aviv 69978, Israel
| | - Gennady Eidelshtein
- Department of Biochemistry and Molecular Biology, George S. Wise Faculty of Life Sciences, and The Center of Nanoscience and Nanotechnology, Tel Aviv University, Ramat Aviv, Tel Aviv 69978, Israel
| | - Dvir Rotem
- Institute of Chemistry and Center for Nanoscience and Nanotechnology, The Hebrew University of Jerusalem, Jerusalem 91904, Israel
| | - Alexander Kotlyar
- Department of Biochemistry and Molecular Biology, George S. Wise Faculty of Life Sciences, and The Center of Nanoscience and Nanotechnology, Tel Aviv University, Ramat Aviv, Tel Aviv 69978, Israel
| | - Danny Porath
- Institute of Chemistry and Center for Nanoscience and Nanotechnology, The Hebrew University of Jerusalem, Jerusalem 91904, Israel
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99998
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Besse HC, Chen Y, Scheeren HW, Metselaar JM, Lammers T, Moonen CTW, Hennink WE, Deckers R. A Doxorubicin-Glucuronide Prodrug Released from Nanogels Activated by High-Intensity Focused Ultrasound Liberated β-Glucuronidase. Pharmaceutics 2020; 12:E536. [PMID: 32532061 PMCID: PMC7355552 DOI: 10.3390/pharmaceutics12060536] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/12/2020] [Revised: 06/05/2020] [Accepted: 06/09/2020] [Indexed: 11/16/2022] Open
Abstract
The poor pharmacokinetics and selectivity of low-molecular-weight anticancer drugs contribute to the relatively low effectiveness of chemotherapy treatments. To improve the pharmacokinetics and selectivity of these treatments, the combination of a doxorubicin-glucuronide prodrug (DOX-propGA3) nanogel formulation and the liberation of endogenous β-glucuronidase from cells exposed to high-intensity focused ultrasound (HIFU) were investigated in vitro. First, a DOX-propGA3-polymer was synthesized. Subsequently, DOX-propGA3-nanogels were formed from this polymer dissolved in water using inverse mini-emulsion photopolymerization. In the presence of bovine β-glucuronidase, the DOX-propGA3 in the nanogels was quantitatively converted into the chemotherapeutic drug doxorubicin. Exposure of cells to HIFU efficiently induced liberation of endogenous β-glucuronidase, which in turn converted the prodrug released from the DOX-propGA3-nanogels into doxorubicin. β-glucuronidase liberated from cells exposed to HIFU increased the cytotoxicity of DOX-propGA3-nanogels to a similar extend as bovine β-glucuronidase, whereas in the absence of either bovine β-glucuronidase or β-glucuronidase liberated from cells exposed to HIFU, the DOX-propGA3-nanogels hardly showed cytotoxicity. Overall, DOX-propGA3-nanogels systems might help to further improve the outcome of HIFU-related anticancer therapy.
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Affiliation(s)
- Helena C. Besse
- Division of Imaging and Oncology, University Medical Center Utrecht, 3584 CX Utrecht, The Netherlands; (H.C.B.); (C.T.W.M.)
| | - Yinan Chen
- Department of Pharmaceutics, Utrecht Institute for Pharmaceutical Sciences, Utrecht University, 3584 CG Utrecht, The Netherlands; (Y.C.); (T.L.); (W.E.H.)
| | - Hans W. Scheeren
- Cluster for Molecular Chemistry, Radboud University, 6525 XZ Nijmegen, The Netherlands;
- Department of Nanomedicine and Theranostics, Institute for Experimental Molecular Imaging, RWTH Aachen University Clinic, 52074 Aachen, Germany;
| | - Josbert M. Metselaar
- Department of Nanomedicine and Theranostics, Institute for Experimental Molecular Imaging, RWTH Aachen University Clinic, 52074 Aachen, Germany;
- Department of Targeted Therapeutics, MIRA Institute for Biomedical Engineering and Technical Medicine, University of Twente, 7500 AE Enschede, The Netherlands
| | - Twan Lammers
- Department of Pharmaceutics, Utrecht Institute for Pharmaceutical Sciences, Utrecht University, 3584 CG Utrecht, The Netherlands; (Y.C.); (T.L.); (W.E.H.)
- Department of Nanomedicine and Theranostics, Institute for Experimental Molecular Imaging, RWTH Aachen University Clinic, 52074 Aachen, Germany;
- Department of Targeted Therapeutics, MIRA Institute for Biomedical Engineering and Technical Medicine, University of Twente, 7500 AE Enschede, The Netherlands
| | - Chrit T. W. Moonen
- Division of Imaging and Oncology, University Medical Center Utrecht, 3584 CX Utrecht, The Netherlands; (H.C.B.); (C.T.W.M.)
| | - Wim E. Hennink
- Department of Pharmaceutics, Utrecht Institute for Pharmaceutical Sciences, Utrecht University, 3584 CG Utrecht, The Netherlands; (Y.C.); (T.L.); (W.E.H.)
| | - Roel Deckers
- Division of Imaging and Oncology, University Medical Center Utrecht, 3584 CX Utrecht, The Netherlands; (H.C.B.); (C.T.W.M.)
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99999
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O'Callahan BT, Park KD, Novikova IV, Jian T, Chen CL, Muller EA, El-Khoury PZ, Raschke MB, Lea AS. In Liquid Infrared Scattering Scanning Near-Field Optical Microscopy for Chemical and Biological Nanoimaging. NANO LETTERS 2020; 20:4497-4504. [PMID: 32356991 DOI: 10.1021/acs.nanolett.0c01291] [Citation(s) in RCA: 22] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/27/2023]
Abstract
Imaging biological systems with simultaneous intrinsic chemical specificity and nanometer spatial resolution in their typical native liquid environment has remained a long-standing challenge. Here, we demonstrate a general approach of chemical nanoimaging in liquid based on infrared scattering scanning near-field optical microscopy (IR s-SNOM). It is enabled by combining AFM operation in a fluid cell with evanescent IR illumination via total internal reflection, which provides spatially confined excitation for minimized IR water absorption, reduced far-field background, and enhanced directional signal emission and sensitivity. We demonstrate in-liquid IR s-SNOM vibrational nanoimaging and conformational identification of catalase nanocrystals and spatio-spectral analysis of biomimetic peptoid sheets with monolayer sensitivity and chemical specificity at the few zeptomole level. This work establishes the principles of in-liquid and in situ IR s-SNOM spectroscopic chemical nanoimaging and its general applicability to biomolecular, cellular, catalytic, electrochemical, or other interfaces and nanosystems in liquids or solutions.
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Affiliation(s)
| | - Kyoung-Duck Park
- Department of Physics, School of Natural Science, Ulsan National Institute of Science and Technology (UNIST), Ulsan 44919, Republic of Korea
| | | | | | | | - Eric A Muller
- Department of Physics, Department of Chemistry, and JILA, University of Colorado at Boulder, Boulder, Colorado 80309, United States
| | | | - Markus B Raschke
- Department of Physics, Department of Chemistry, and JILA, University of Colorado at Boulder, Boulder, Colorado 80309, United States
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100000
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Sharifi S, Hajipour MJ, Gould L, Mahmoudi M. Nanomedicine in Healing Chronic Wounds: Opportunities and Challenges. Mol Pharm 2020; 18:550-575. [PMID: 32519875 DOI: 10.1021/acs.molpharmaceut.0c00346] [Citation(s) in RCA: 64] [Impact Index Per Article: 16.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
The poor healing associated with chronic wounds affects millions of people worldwide through high mortality rates and associated costs. Chronic wounds present three main problems: First, the absence of a suitable environment to facilitate cell migration, proliferation, and angiogenesis; second, bacterial infection; and third, unbalanced and prolonged inflammation. Unfortunately, current therapeutic approaches have not been able to overcome these main issues and, therefore, have limited clinical success. Over the past decade, incorporating the unique advantages of nanomedicine into wound healing approaches has yielded promising outcomes. Nanomedicine is capable of stimulating various cellular and molecular mechanisms involved in the wound microenvironment via antibacterial, anti-inflammatory, and angiogenetic effects, potentially reversing the wound microenvironment from nonhealing to healing. This review briefly discusses wound healing mechanisms and pathophysiology and then highlights recent findings regarding the opportunities and challenges of using nanomedicine in chronic wound management.
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Affiliation(s)
- Shahriar Sharifi
- Department of Radiology and Precision Health Program, Michigan State University, East Lansing, Michigan 48824, United States
| | - Mohammad Javad Hajipour
- Department of Radiology and Precision Health Program, Michigan State University, East Lansing, Michigan 48824, United States
| | - Lisa Gould
- Brown University School of Medicine, Providence, Rhode Island 02912, United States.,South Shore Health System Center for Wound Healing, Weymouth, Massachusetts 02189, United States
| | - Morteza Mahmoudi
- Department of Radiology and Precision Health Program, Michigan State University, East Lansing, Michigan 48824, United States
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