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Precisely Regulating Intermolecular Interactions and Molecular Packing of Nonfused-Ring Electron Acceptors via Halogen Transposition for High-Performance Organic Solar Cells

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Angewandte Chemie 2024年第34期136卷

作者： Xiaobin Gu Rui Zeng Yuqi Hou Na Yu Jiawei Qiao Dr. Hongxiang Li Yanan Wei Dr. Tengfei He Jinge Zhu Jiawei Deng Senke Tan Dr. Cai'e Zhang Prof. Yunhao Cai Prof. Guankui Long Prof. Xiaotao Hao Prof. Zheng Tang Prof. Feng Liu Prof. Xin Zhang Prof. Hui Huang College of Materials Science and Opto-Electronic Technology Center of Materials Science and Optoelectronics Engineering CAS Center for Excellence in Topological Quantum Computation and CAS Key Laboratory of Vacuum Physics University of Chinese Academy of Sciences Beijing 101408 China School of Chemistry and Chemical Engineering Frontiers Science Center for Transformative Molecules In situ Center for Physical Science and Center of Hydrogen Science Shanghai Jiao Tong University Shanghai 200240 China Center for Advanced Low-Dimension Materials State Key Laboratory for Modification of Chemical Fibers and Polymer Materials College of Materials Science and Engineering Donghua University Shanghai 201620 China School of Physics State Key Laboratory of Crystal Materials Shandong University Jinan 250100 China College of Polymer Science and Engineering State Key Laboratory of Polymer Materials Engineering Sichuan University Chengdu 610106 China School of Materials Science and Engineering National Institute for Advanced Materials Renewable Energy Conversion and Storage Center (RECAST) Nankai University Tianjin 300071 China

The structure of molecular aggregates is crucial for charge transport and photovoltaic performance in organic solar cells (OSCs). Herein, the intermolecular interactions and aggregated structures of nonfused-ring electron acceptors (NFREAs) are precisely regulated through a halogen transposition strategy, resulting in a noteworthy transformation from a 2D-layered structure to a 3D-interconnected packing network. Based on the 3D electron transport pathway, the binary and ternary devices deliver outstanding power conversion efficiencies (PCEs) of 17.46 % and 18.24 %, respectively, marking the highest value for NFREA-based OSCs.

关键词： organic solar cells nonfused-ring electron acceptors intermolecular interactions molecular packing halogenation

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-induced semiconductor-to-metal transition in spinel nickel cobaltite thin films

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physical Review B 2021年第12期104卷

作者： Huang, X.C. Li, W.-W. Zhang, S. Oropeza, F.E. Gorni, G. de la Peña-O’Shea, V.A. Lee, T.-L. Wu, M. Wang, L.-S. Qi, D.-C. Qiao, L. Cheng, J. Zhang, K. H. L. State Key Laboratory of Physical Chemistry of Solid Surfaces College of Chemistry and Chemical Engineering Xiamen University Xiamen361005 China MIIT Key Laboratory of Aerospace Information Materials and Physics College of Science Nanjing University of Aeronautics and Astronautics Nanjing211106 China School of Physics University of Electronic Science and Technology of China Chengdu610054 China Photoactivated Processes Unit IMDEA Energy Institute Parque Tecnológico de Móstoles Avda. Ramón de la Sagra 3 Móstoles Madrid28935 Spain CELLS-ALBA Synchrotron Carrer de la Llum 2-26 Cerdanyola del Vallès08290 Spain Diamond Light Source Ltd. Harwell Science and Innovation Campus DidcotOX11 0DE United Kingdom Department of Physics Xiamen University Xiamen361005 China Fujian Key Laboratory of Materials Genome College of Materials Xiamen University Xiamen361005 China School of Chemistry Physics and Mechanical Engineering Queensland University of Technology BrisbaneQL4001 Australia

In this paper, we report insights into the local atomic and electronic structure of epitaxial thin films and its correlation with electrical, optical, and magnetic properties. We grew structurally well-defined epitaxial thin films with controlled properties on substrates using pulsed laser deposition. Films grown at low temperatures () exhibit a ferrimagnetic and metallic behavior, while those grown at high temperatures are nonmagnetic semiconductors. The electronic structure and cation local atomic coordination of the respective films were investigated using a combination of resonant photoemission spectroscopy, x-ray absorption spectroscopy, and ab initio calculations. Our results unambiguously reveal that the valence state promoted at low growth temperature introduces delocalized -derived states at the Fermi level (), responsible for the metallic state in , while the -related state is more localized at higher binding energy. In the semiconducting films, the valence state of Ni is lowered and . Further structural and defect chemistry studies indicate that the formation of oxygen vacancies and secondary CoO phases at high growth temperature are responsible for the valence state in . The -related state becomes localized away from , opening a band gap for a semiconducting state. The band gap of the semiconducting is estimated to be , which is much smaller than the quoted values in the literature ranging from 1.1 to 2.58 eV. Despite the small band gap, its optical transition is dipole forbidden, and therefore, the semiconducting still shows reasonable transparency in the infrared-visible light region. The present insights into the role of in determining the electronic structure and defect chemistry of provide important guidance for use of in electrocatalysis and opto-electronics. © 2021 American physical Society

关键词： Thin films

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SN 2021zny: an early flux excess combined with late-time oxygen emission suggests a double white dwarf merger event

arXiv

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arXiv 2023年

作者： Dimitriadis, Georgios Maguire, Kate Karambelkar, Viraj R. Lebron, Ryan J. Liu, Chang Kozyreva, Alexandra Miller, Adam A. Ridden-Harper, Ryan Anderson, Joseph P. Chen, Ting-Wan Coughlin, Michael Della Valle, Massimo Drake, Andrew Galbany, Lluís Gromadzki, Mariusz Groom, Steven L. Gutiérrez, Claudia P. Ihanec, Nada Inserra, Cosimo Johansson, Joel Müller-Bravo, Tomás E. Nicholl, Matt Polin, Abigail Rusholme, Ben Schulze, Steve Sollerman, Jesper Srivastav, Shubham Taggart, Kirsty Wang, Qinan Yang, Yi Young, David R. School of Physics Trinity College Dublin The University of Dublin Dublin 2 Ireland Cahill Center for Astrophysics California Institute of Technology PasadenaCA91125 United States Department of Physics and Engineering University of Scranton ScrantonPA18510 United States Department of Physics and Astronomy Northwestern University 2145 Sheridan Rd EvanstonIL60208 United States Northwestern University 1800 Sherman Ave EvanstonIL60201 United States Max-Planck-Institut für Astrophysik Karl-Schwarzschild-Str. 1 Garching bei München85748 Germany School of Physical and Chemical Sciences—Te Kura Matu University of Canterbury Private Bag 4800 Christchurch8140 New Zealand European Southern Observatory Alonso de Córdova 3107 Casilla 19 Santiago Chile Millennium Institute of Astrophysics MAS Nuncio Monsenor Sotero Sanz 100 Off. 104 Providencia Santiago Chile Technische Universität München TUM School of Natural Sciences Physik-Department James-Franck-Straße 1 Garching85748 Germany School of Physics and Astronomy University of Minnesota MinneapolisMN55455 United States INAF - Osservatorio Astronomico di Capodimonte Salita Moiariello 16 Napoli80131 Italy Department of Physics Ariel University Ariel Israel Campus UAB Carrer de Can Magrans s/n BarcelonaE-08193 Spain BarcelonaE-08034 Spain Astronomical Observatory University of Warsaw Al. Ujazdowskie 4 Warszawa00-478 Poland IPAC California Institute of Technology 1200 E. California Blvd PasadenaCA91125 United States University of Turku FI-20014 Finland Tuorla Observatory Department of Physics and Astronomy University of Turku FI-20014 Finland Cardiff Hub for Astrophysics Research and Technology School of Physics & Astronomy Cardiff University Queens Buildings The Parade CardiffCF24 3AA United Kingdom The Oskar Klein Centre Department of Physics Stockholm University Albanova University Center StockholmSE 106 91 Sweden Birmingham Institute for Gravitational Wave Astronomy School

We present a photometric and spectroscopic analysis of the ultra-luminous and slowly evolving 03fg-like Type Ia SN 2021zny. Our observational campaign starts from ∼ 5.3 hours after explosion (making SN 2021zny one of the earliest observed members of its class), with dense multi-wavelength coverage from a variety of ground- and space-based telescopes, and is concluded with a nebular spectrum ∼ 10 months after peak brightness. SN 2021zny displayed several characteristics of its class, such as the peak brightness (MB = −19.95 mag), the slow decline (Δm15(B) = 0.62 mag), the blue early-time colours, the low ejecta velocities and the presence of significant unburned material above the photosphere. However, a flux excess for the first ∼ 1.5 days after explosion is observed in four photometric bands, making SN 2021zny the third 03fg-like event with this distinct behavior, while its +313 d spectrum shows prominent [O i] lines, a very unusual characteristic of thermonuclear SNe. The early flux excess can be explained as the outcome of the interaction of the ejecta with ∼ 0.04 M☉ of H/He-poor circumstellar material at a distance of ∼ 1012 cm, while the low ionization state of the late-time spectrum reveals low abundances of stable iron-peak elements. All our observations are in accordance with a progenitor system of two carbon/oxygen white dwarfs that undergo a merger event, with the disrupted white dwarf ejecting carbon-rich circumstellar material prior to the primary white dwarf detonation. © 2023, CC BY.

关键词： Supernovae

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Detection of Gamma Ray Emission from the Sagittarius Dwarf Spheroidal Galaxy

Research Square

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Research Square 2021年

作者： Crocker, Roland M. Macias, Oscar Mackey, Dougal Krumholz, Mark R. Ando, Shin'ichiro Horiuchi, Shunsaku Baring, Matthew G. Gordon, Chris Venville, Thomas Duffy, Alan R. Yang, Rui-Zhi Aharonian, Felix Hinton, J.A. Song, Deheng Ruiter, Ashley J. Filipović, Miroslav D. Research School of Astronomy and Astrophysics Australian National University CanberraA.C.T.2611 Australia GRAPPA − Gravitational and Astroparticle Physics Amsterdam University of Amsterdam Science Park 904 Amsterdam1098 XH Netherlands UTIAS The University of Tokyo Chiba Kashiwa277-8583 Japan Center for Neutrino Physics Department of Physics Virginia Tech BlacksburgVA24061 United States Department of Physics and Astronomy - MS 108 Rice University 6100 Main Street HoustonTX77251-1892 United States School of Physical and Chemical Sciences University of Canterbury Christchurch New Zealand Centre for Astrophysics and Supercomputing Swinburne University of Technology PO Box 218 HawthornVIC3122 Australia Department of Astronomy School of Physical Sciences University of Science and Technology of China Anhui Hefei230026 China CAS Key Labrotory for Research in Galaxies and Cosmology University of Science and Technology of China Anhui Hefei230026 China School of Astronomy and Space Science University of Science and Technology of China Anhui Hefei230026 China Max-Planck-Institut für Kernphysik Saupfercheckweg 1 Heidelberg69117 Germany Dublin Institute for Advanced Studies 31 Fitzwilliam Place Dublin 2 Ireland School of Science University of New South Wales Canberra The Australian Defence Force Academy 2600 CanberraACT Australia Western Sydney University Locked Bag 1797 Penrith South DCNSW2751 Australia

The Fermi Bubbles are giant, γ-ray emitting lobes emanating from the nucleus of the Milky Way[1, 2] discovered in ∼ 1-100 GeV data collected by the Large Area Telescope on board the Fermi Gamma-Ray Space Telescope[3]. Previous work[4] has revealed substructure within the Fermi Bubbles that has been interpreted as a signature of collimated outflows from the Galaxy’s super-massive black hole. Here we show that much of the γ-ray emission associated to the brightest region of substructure – the so-called cocoon – is actually due to the Sagittarius dwarf spheroidal (Sgr dSph) galaxy. This large Milky Way satellite is viewed through the Fermi Bubbles from the position of the Solar System. As a tidally and ram-pressure stripped remnant, the Sgr dSph has no on-going star formation, but we demonstrate that its γ-ray signal is naturally explained by inverse Compton scattering of cosmic microwave background photons by high-energy electron-positron pairs injected by the dwarf’s millisecond pulsar (MSP) population, combined with these objects’ magnetospheric emission. This finding suggests that MSPs likely produce significant γ-ray emission amongst old stellar populations, potentially confounding indirect dark matter searches in regions such as the Galactic Centre, the Andromeda galaxy, and other massive Milky Way dwarf spheroidals. © 2021, CC BY.

关键词： Gamma rays

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Testing for Intrinsic Type Ia Supernova Luminosity Evolution at z > 2 with JWST

arXiv

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arXiv 2024年

作者： Pierel, J.D.R. Coulter, D.A. Siebert, M.R. Akins, H.B. Engesser, M. Fox, O.D. Franco, M. Rest, A. Agrawal, A. Ajay, Y. Allen, N. Casey, C.M. Decoursey, C. Drakos, N.E. Egami, E. Faisst, A.L. Gezari, S. Gozaliasl, G. Ilbert, O. Jones, D.O. Karmen, M. Kartaltepe, J.S. Koekemoer, A.M. Lane, Z.G. Larson, R.L. Li, T. Liu, D. Moriya, T.J. McCracken, H.J. Paquereau, L. Quimby, R.M. Rich, R.M. Rhodes, J. Robertson, B.E. Sanders, D.B. Shahbandeh, M. Shuntov, M. Silverman, J.D. Strolger, L.G. Toft, S. Zenati, Y. Space Telescope Science Institute BaltimoreMD21218 United States The University of Texas at Austin 2515 Speedway Blvd Stop C1400 AustinTX78712 United States CEA Université Paris-Saclay Université Paris Cité CNRS AIM Gif-sur-Yvette91191 France Physics and Astronomy Department Johns Hopkins University BaltimoreMD21218 United States Department of Astronomy University of Illinois at Urbana-Champaign 1002 W. Green St. IL61801 United States Denmark Niels Bohr Institute University of Copenhagen Jagtvej 128 CopenhagenDK-2200 Denmark Department of Physics University of California Santa Barbara Santa BarbaraCA93109 United States Steward Observatory University of Arizona 933 N. Cherry Avenue TucsonAZ85721 United States Department of Physics and Astronomy University of Hawaii Hilo 200 W Kawili St HiloHI96720 United States Caltech/IPAC MS 314-6 1200 E. California Blvd PasadenaCA91125 United States Department of Computer Science Aalto University P.O. Box 15400 EspooFI-00076 Finland Department of Physics University P.O. Box 64 HelsinkiFI-00014 Finland Aix Marseille Univ CNRS CNES LAM Marseille France Institute for Astronomy University of Hawai‘i 640 N. A’ohoku Pl. HiloHI96720 United States Lab for Multiwavelength Astrophysics School of Physics and Astronomy Rochester Institute of Technology 84 Lomb Memorial Dr. RochesterNY14623 United States School of Physical and Chemical Sciences — Te Kura Matū University of Canterbury Private Bag 4800 Christchurch8140 New Zealand Institute of Cosmology and Gravitation University of Portsmouth Burnaby Road PortsmouthPO1 3FX United Kingdom Purple Mountain Observatory Chinese Academy of Sciences 10 Yuanhua Road Nanjing210023 China National Astronomical Observatory of Japan National Institutes of Natural Sciences 2-21-1 Osawa Mitaka Tokyo181-8588 Japan Graduate Institute for Advanced Studies SOKENDAI 2-21-1 Osawa Mitaka Tokyo181-8588 Japan School of Physics and Astronomy Monash Univ

The James Webb Space Telescope (JWST) is opening new frontiers of transient discovery and follow-up at high-redshift. Here we present the discovery of a spectroscopically confirmed Type Ia supernova (SN Ia;SN 2023aeax) at z = 2.15 with JWST, including a NIRCam multi-band light curve. SN 2023aeax lands at the edge of traditional low-z cosmology cuts because of its blue color (peak rest-frame B − V ∼ −0.3) but with a normal decline rate (∆m15(B) ∼ 1.25), and applying a fiducial standardization with the BayeSN model we find the SN 2023aeax luminosity distance is in ∼ 0.1σ agreement with ΛCDM. SN 2023aeax is only the second spectroscopically confirmed SN Ia in the dark matter-dominated Universe at z > 2 (the other is SN 2023adsy), giving it rare leverage to constrain any potential evolution in SN Ia standardized luminosities. Similar to SN 2023adsy (B − V ∼ 0.8), SN 2023aeax has a fairly extreme (but opposite) color, which may be due to the small sample size or a secondary factor, such as host galaxy properties. Nevertheless, the SN 2023aeax spectrum is well-represented by normal low-z SN Ia spectra and we find no definitive evolution in SN Ia standardization with redshift. Still, the first two spectroscopically confirmed z > 2 SNe Ia have peculiar colors and combine for a ∼ 1σ distance slope relative to ΛCDM, though in agreement with recent SN Ia cosmological measurements. Copyright © 2024, The Authors. All rights reserved.

关键词： Supernovae

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Exclusive Co-N4Sites Confined in Two-dimensional Metal-Organic Layers Enabling Highly Selective CO2Electroreduction at Industrial-Level Current

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Angewandte Chemie 2023年第23期135卷

作者： Dr. Wenjun Zhang Dr. Shanshan Liu Dr. Yue Yang Dr. Haifeng Qi Dr. Shibo Xi Dr. Yanping Wei Dr. Jie Ding Prof. Zhu-Jun Wang Prof. Qunxiang Li Prof. Bin Liu Prof. Zupeng Chen Jiangsu Co-Innovation Center of Efficient Processing and Utilization of Forest Resources International Innovation Center for Forest Chemicals and Materials College of Chemical Engineering Nanjing Forestry University Nanjing 210037 P. R. China Department of Chemical Physics & Hefei National Research Center for Physical Sciences at the Microscale University of Science and Technology of China Hefei Anhui 230026 P. R. China School of Physical Science and Technology Shanghai Tech University Shanghai 201210 P. R. China Leibniz-Institute for Catalysis Albert Einstein Street 29a 18059 Rostock Germany Institute of Sustainability for Chemicals Energy and Environment (ISCE2) Agency for Science Technology and Research in Singapore (A*STAR) 1 Pesek Road Jurong Island Singapore 627833 Singapore College of Science Gansu Agricultural University Lanzhou 730070 P. R. China Department of Materials Science and Engineering City University of Hong Kong Hong Kong SAR 999077 P. R. China

Metal-organic framework catalysts bring new opportunities for CO 2 electrocatalysis. Herein, we first conduct density-functional theory calculations and predict that Co-based porphyrin porous organic layers (Co-PPOLs) exhibit good activity for CO 2 conversion because of the low *CO adsorption energy at Co-N 4 sites, which facilitates *CO desorption and CO formation. Then, we prepare two-dimensional Co-PPOLs with exclusive Co-N 4 sites through a facile surfactant-assisted bottom-up method. The ultrathin feature ensures the exposure of catalytic centers. Together with large specific area, high electrical conductivity and CO 2 adsorption capability, Co-PPOLs achieve a peak faradaic efficiency for CO production ( FE CO =94.2 %) at a moderate potential in CO 2 electroreduction, accompanied with good stability. Moreover, Co-PPOLs reach an industrial-level current above 200 mA in a membrane electrode assembly reactor, and maintain near-unity CO selectivity ( FE CO >90 %) over 20 h in CO 2 electrolysis.

关键词： Bottom-up Method CO2 Reduction Co-N4 Sites MEA Device Porphyrin Porous Organic Layers

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JCMT 850 µm continuum observations of density structures in the G35 molecular complex

arXiv

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arXiv 2024年

作者： Shen, Xianjin Liu, Hong-Li Ren, Zhiyuan Tej, Anandmayee Li, Di Liu, Hauyu Baobab Fuller, Gary A. Xie, Jinjin Jiao, Sihan Yang, Aiyuan Koch, Patrick M. Xu, Fengwei Sanhueza, Patricio Diep, Pham Ngoc Peretto, Nicolas Yadav, Ram K. Kramer, Busaba H. Sugiyama, Koichiro Rawlings, Mark G. Lee, Chang Won Tatematsu, Kenichi Harsono, Daniel Eden, David Kwon, Woojin Tsai, Chao-Wei White, Glenn J. Kim, Kee-Tae Liu, Tie Wang, Ke Zhang, Siju Jiao, Wenyu Yang, Dongting Swagat, R. Das Wu, Jingwen Wang, Chen School of Physics and Astronomy Yunnan University Kunming650091 China National Astronomical Observatories Chinese Academy of Sciences Datun Road A20 Beijing China CAS Key Laboratory of FAST NAOC Chinese Academy of Sciences Beijing China University of Chinese Academy of Sciences Beijing China Indian Institute of Space Science and Technology Kerala Thiruvananthapuram695 547 India University of KwaZulu-Natal Durban4000 South Africa Department of Physics National Sun Yat-Sen University No. 70 Lien-Hai Road Kaohsiung City80424 Taiwan Center of Astronomy and Gravitation National Taiwan Normal University Taipei116 Taiwan Jodrell Bank Centre for Astrophysics School of Physics and Astronomy University of Manchester Oxford Road ManchesterM13 9PL United Kingdom Physikalisches Institut University of Cologne Zülpicher Str. 77 KölnD-50937 Germany Key Laboratory of Radio Astronomy and Technology Chinese Academy of Sciences A20 Datun Road Datun Road A20 Beijing China Max-Plank-Institut für Radioastronomie Auf dem Hügel 69 BonnD-53121 Germany Academia Sinica Institute of Astronomy and Astrophysics No. 1 Sec. 4 Roosevelt Road Taipei10617 Taiwan Kavli Institute for Astronomy and Astrophysics Peking University 5 Yiheyuan Road Haidian District Beijing100871 China Department of Astronomy School of Physics Peking University Beijing100871 China National Astronomical Observatory of Japan National Institutes of Natural Sciences 2-21-1 Osawa Mitaka Tokyo181-8588 Japan Astronomical Science Program The Graduate University for Advanced Studies SOKENDAI 2-21-1 Osawa Mitaka Tokyo181-8588 Japan Vietnam National Space Center Vietnam Academy of Science and Technology 18 Hoang Quoc Viet Hanoi Viet Nam Cardiff Hub for Astrophysics Research & Technology School of Physics & Astronomy Cardiff University Queens Buildings The Parade CardiffCF24 3AA United Kingdom Sirindhorn AstroPark 260 Moo 4 T. Donkaew A. Maerim Chiangmai50180 Thailand Gemini Observato

Filaments are believed to play a key role in high-mass star formation. We present a systematic study of the filaments and their hosting clumps in the G35 molecular complex using JCMT SCUBA-2 850 µm continuum data. We identified five clouds in the complex and 91 filaments within them, some of which form 10 hub-filament systems (HFSs), each with at least 3 hub-composing filaments. We also compiled a catalogue of 350 dense clumps, 183 of which are associated with the filaments. We investigated the physical properties of the filaments and clumps, such as mass, density, and size, and their relation to star formation. We find that the global mass-length trend of the filaments is consistent with a turbulent origin, while the hub-composing filaments of high line masses (ml > 230 M☉ pc−1) in HFSs deviate from this relation, possibly due to feedback from massive star formation. We also find that the most massive and densest clumps (R > 0.2 pc, M > 35 M☉, Σ > 0.05 g cm−2) are located in the filaments and in the hubs of HFS with the latter bearing a higher probability of occurrence of high-mass star-forming signatures, highlighting the preferential sites of HFSs for high-mass star formation. We do not find significant variation in the clump mass surface density across different evolutionary environments of the clouds, which may reflect the balance between mass accretion and stellar feedback. Copyright © 2024, The Authors. All rights reserved.

关键词： Giant stars

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Graphene-based nanomaterials in biosystems

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Nano Research 2019年第2期12卷 247-264页

作者： Na Lu Liqian Wang Min Lv Zisheng Tang Chunhai Fan School of Materials Engineering Shanghai University of Engineering Science Shanghai 201620 China Division of Physical Biology and Bioimaging Center Shanghai Synchrotron Radiation Facility CAS Key Laboratory of Interfacial Physics and Technology Shanghai Institute of Applied Physics Chinese Academy of Sciences Shanghai 201800 China Department of Endodontics Shanghai Ninth Peoples Hospital College of Stomatology Shanghai Jiao Tong University School of Medicine Shanghai 200011 China National Clinical Research Center of Oral Diseases Shanghai 200011 China Shanghai Key Laboratory of Stomatology & Shanghai Research Institute of Stomatology Shanghai 200011 China School of Chemistry and Chemical Engineering and Institute of Molecular Medicine Renji Hospital School of Medicine Shanghai Jiao Tong University Shanghai 200240 China

Graphene-based nanomaterials have emerged as a novel type of materials with exceptional physicochemical properties and numerous applications in various areas. In this review, we summarize recent advances in studying interactions between graphene and biosystems. We first provide a brief introduction on graphene and its derivatives, and then discuss on the toxicology and biocompatibility of graphene, including the extracellular interactions between graphene and biomacromolecules, cellular studies of graphene, and in vivo toxicological effects. Next, we focus on various graphene-based practical applications in antibacterial materials, wound addressing, drug delivery, and water *** finally present perspectives on challenges and future developments in these exciting fields.

关键词： graphene-based nanomaterials toxicology and biocompatibility biomacromolecules cells living entitles applications

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Morfology, Microstrucuture and Electrocatalytical Properties of Sol-Gel Spin Coated Bi05na05ba(Tio3)2 Thin Films

SSRN

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SSRN 2022年

作者： Batista, Carlos Yago Pereira Romaguera–Barcelay, Yonny Matos, Robert Saraiva Pedraça, Aline dos Santos Amâncio, Moisés do Amaral Kourouma, Ansoumane Ruiz, Yurimiler Leyet Cotta, Eduardo Adriano Brito, Walter Ricardo Gandarilla, Ariamna María Dip do Nascimento, Marcus Valério Botelho Nobre, Francisco Xavier Ferreira, Nilson S. Salerno, Marco da Fonseca Filho, Henrique Duarte Technological Materials Processing Laboratory Federal University of Amazonas Amazonas Manaus69067-005 Brazil BioMark UC Department of Chemical Engineering Faculty of Sciences and Technology University of Coimbra Coimbra3030-790 Portugal Department of Physics Federal University of Amazonas Amazonas Manaus69067-005 Brazil Department of Physics Federal University of Amapá Amapá Macapá68902-280 Brazil Electrical Engineering postgraduate program Federal University of Amazonas Amazonas Manaus69067-005 Brazil Department of Chemistry Federal University of Amazonas Amazonas Manaus69067-005 Brazil Department of Pharmaceutical Sciences Gamal Abdel Nasser University of Conakry Guinea-bissau Federal Institute of Amazonas—Campus Coari Coari69460-000 Brazil Department of Physics Federal University of Sergipe São Cristovão Sergipe49100-000 Brazil Institute for Materials Science Max Bergmann Center of Biomaterials Technische Universität Dresden Dresden01069 Germany Laboratory of Nanomaterials Synthesis and Nanoscopy Department of Physics Federal University of Amazonas Amazonas Manaus69067-005 Brazil

Herein, we report, for the first time, the reduction reaction kinetics of ciprofloxacin organic molecules based on structural and micromorphological conditions of an electrocatalytic system of Bi05Na05Ba(TiO3)2 (BNT-BT) thin films. XRD analysis showed the coexistence of rhombohedral and tetragonal structures for the BNT-BT thin films annealed at 600, 650, and 700°C, showing that the first one had a greater number of surface defects, which was confirmed by Raman Spectroscopy. Analysis of the 3D micromorphological evaluation showed that an annealing temperature increase from 600 to 700 °C does not induce significant changes in the topographical profile. However, BNT-BT thin films annealed at 600 °C displayed more anisotropic surface microtexture, high spatial complexity, and low spatial frequencies. For the reactive surface of BNT-BT films, the electroanalytical assays showed that electrons from the conduction band are captured by oxygen adsorbed on the film surface, forming superoxide radicals that attack ciprofloxacin molecules, promoting their degradation. The best performance observed for the BNT-BT thin films annealed at 600 ºC is attributed to their unique structural and micromorphological properties compared to the films annealed with higher temperatures. Our results prove that the proposed thin film deposition process is a promising approach for developing new electrocatalytic devices. © 2022, The Authors. All rights reserved.

关键词： Sol-gels

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Rational Electrolyte Design toward Cyclability Remedy for Room-Temperature Sodium–Sulfur Batteries

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Angewandte Chemie 2022年第30期134卷

作者： Junru Wu Yao Tian Yifu Gao Ziyao Gao Yuefeng Meng Yao Wang Xia Wang Dr. Dong Zhou Prof. Feiyu Kang Prof. Baohua Li Prof. Guoxiu Wang Tsinghua Shenzhen International Graduate School Tsinghua University Shenzhen Guangdong 518055 China School of Materials Science and Engineering Tsinghua University Beijing 100084 China Max Planck Institute for Chemical Physics of Solids 01187 Dresden Germany Centre for Clean Energy Technology School of Mathematical and Physical Sciences University of Technology Sydney Sydney NSW 2007 Australia

Rechargeable room-temperature sodium–sulfur (RT Na–S) batteries are a promising energy storage technology, owing to the merits of high energy density and low cost. However, their electrochemical performance has been severely hindered by the poor compatibility between the existing electrolytes and the electrodes. Here, we demonstrate that an all-fluorinated electrolyte, containing 2,2,2-trifluoro- N , N -dimethylacetamide (FDMA) solvent, 1,1,2,2-tetrafluoroethyl methyl ether (MTFE) anti-solvent and fluoroethylene carbonate (FEC) additive, can greatly enhance the reversibility and cyclability of RT Na–S batteries. A NaF- and Na 3 N-rich cathode electrolyte interphase derived from FDMA and FEC enables a “quasi-solid-phase” Na–S conversion, eliminating the shuttle of polysulfides. The MTFE not only reduces polysulfide dissolution, but also further stabilizes the Na anode via a tailored solvation structure. The as-developed RT Na–S batteries deliver a high capacity, long lifespan, and enhanced safety.

关键词： All-Fluorinated Electrolyte Cathode Electrolyte Interphase Quasi-Solid-Phase Conversion Sodium–Sulfur Batteries Solvation Structure

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