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Steric and electronic selectivity in the synthesis of Fe- 1,2,4,5-tetracyanobenzene （TCNB） complexes on Au（111）： From topological confinement to bond formation

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Nano Research 2014年第6期7卷 888-897页

作者： Shawulienu Kezilebieke Anis Amokrane Mauro Boero Sylvain Clai Mathieu Abel Jean-Pierre Bucher institut de physique et Chimie des Materiaux de Strasbourg CNRS UMR 7504 Universit~ de Strasbourg F-67034 Strasbourg France Universite Aix-Marseille IM2NP CNRS UMR 7334 Campus de Saint-Jereme Case 142 F- 13397 Marseille Cedex 20 France

A study of the surface assisted self-assembly of 1,2,4,5-tetracyanobenzene （TCNB） acceptor molecules and Fe atoms on an Au（111） surface is presented. While conditions to get the two-dimensional arrays of stable Fe（TCNB）4 complexes are clearly identified, ultrahigh vacuum scanning tunneling microscopy and spectroscopy （STM/STS） coupled with first-principles calculations reveals that situations may occur where Fe and TCNB survive on the surface （as Fe-4TCNB entities） at a higher density than the original molecular monolayer without forming coordination bonds with each other. It is found that the square planar coordination of the Fe（TCNB）4 monomer complexes cannot fully develop in the presence of lateral strain due to growth-induced confinement. A phenomenon similar to steric hindrance involving a strongly modified chirality with a Fe-N-C bond angle of 120° compared to the 180° for the stable complex may then explain why the Fe atom keeps its metallic bond with the surface. The competition between steric and electronic effects, not reported before, may arise elsewhere in surface chemistry involved in the synthesis of new and potentially useful organic nanomaterials.

关键词： scanning tunnelingspectroscopy STM self-assembly steric hindrance metal-organic coordination chirality nanochemistry surface state

N-cluster correlations in four-and five-dimensional percolation

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Frontiers of physics 2020年第4期15卷 5-16页

作者： Xiao-Jun Tan You-Jin deng Jesper Lykke Jacobsen Hefei National Laboratory for Physical Sciences at Microscale and department of Modern Physics University of Science and Technology of ChinaHefei 230026China CAS Center for Ercellence and Synergetic Innovation Center in Quantun Information and Quantum Physics University of Science and Technology of ChinaHefei 230026China Laboratoire de physique de I'Ecole Normale Superieure ENSUniversite PSLCNRSSorbonne UniversiteUniversite de ParisParisFrance Sorbnne Universite Eecole Normale SuperieureCNRSLaborutoire de Physique(LPENS)75005 ParisFrance institut de physique Theorique Universite Paris SaclayCEACNRS91191 Gif-sur-YvetteFrance

We study N-cluster correlation functions in four-and five-dimensional(4D)and 5D)bond percolation by extensive Monte Carlo *** reformulate the transfer Monte Carlo algorithm for percolation[***.E 72,016126(2005)]using the disjoint-set data structure,and simulate a cylindrical geometry Ld^-1×∞,with the linear size up to L=512 for 4D and 128 for *** determine with 1 high precision all possible N-cluster exponents,for N=2 and 3,and the universal amplitude for a logarithmic correlation *** the symmetric correlator with N=2,we obtain the correlation-length critical exponent as 1/v=1.4610(12)for 4D and 1/v=1.737(2)for 5D,significantly improving over the existing *** for the other exponents and the universal logarithmic amplitude have not been reported before to our *** work demonstrates the validity of logarithmic conformal field theory and adds to the growing knowledge for high-dimensional percolation.

关键词： critical exponents percolation logarithmic conformal field theory Monte Carlo algorithm

Recent development in metal halide perovskites synthesis to improve their charge-carrier mobility and photocatalytic efficiency

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Science China Materials 2023年第7期66卷 2545-2572页

作者： Marija Knezevic Thi-Hieu Hoang Nusrat Rashid Mojtaba Abdi-Jalebi Christophe Colbeau-Justin Mohamed Nawfal Ghazzal Universite Paris-Saclay Institut de Chimie PhysiqueUMR 8000 CNRS91405OrsayFrance institute for Materials Discovery University College LondonMalet PlaceLondonWC1E 7JEUK

Over the past decade,all-inorganic metal halide perovskites(MHPs,CsPbX_(3):X=Cl,Br,I)have been widely investigated as promising materials for optoelectronic devices such as solar cells and light-emitting *** are defecttolerant,which allows tuning of their bandgap without altering their photophysical *** a fundamental point of view,MHPs are excellent candidates for photocatalytic reactions due to their light-harvesting capability,high photogenerated charge-carrier mobility,long diffusion lengths,and tunable bandgap *** this review,we provide an overview of various MHP engineering strategies(e.g.,surface,morphological,and structural modifications,heterojunction coupling,and encapsulation)which are directly linked to the charge-carrier mobility and lifetimes,and then to the photocatalytic ***,we outline different synthetic approaches resulting in surface and morphological modifications,anion/cation substitution,metallic doping,coupling,and encapsulation that tremendously influence MHPs’stability,optical properties,and charge-carrier dynamics at variable time scales(from fs toμs).We also provide an in-depth evaluation of the MHPs for variable photoredox reactions,discussing how the optical and electronic properties help to improve their stability and efficiency.

关键词： all-inorganic halide perovskite charge-carrier dynamics stability photocatalysis

How everything started:A retrospective

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Geoscience Frontiers 2014年第5期5卷 627-634页

作者： Jacques Touret institut de Mineralogie.de physique des Materiaux.et de Cosmochimie IMPMC).Sorbonne Universites-UPMC Univ Paris 06 UMR CNRS 7590 Museum National d'Histoire Naturelle.IRD UMR 206.4 Place Jussieu F-75005 Paris France

Recalling some of the most important events and persons during his education and career, the author sketches his growth from a young engineer, educated in the sanctuary of solid state reactions, to an involved fully devoted scientific career for the study of fluids in the deep Earth. Most important in this respect was the discovery of C02 inclusions in granulites, which triggered years of discussion on fluid- absent or fluid-assisted granulite metamorphism. To some extent, this debate is a continuation of the former granite controversy, but it shows also how the famous battle of ＂soaks against pontiffs＂ could have been easily avoided.

关键词： Granite controversyMetamorphic petrologyFluid inclusionsJ TouretGranulites

Graphene oxide-decorated Fe2（MoO4）3 microflowers as a promising anode for lithium and sodium storage

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Nano Research 2018年第3期11卷 1285-1293页

作者： Chunhua Han Xiaoji Ren Qidong Li Wen Luo Lei Huang Liang Zhou Liqiang Mai State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of Technology Luoshi Road122 Wuhan 430070 China Laboratoire de Chimie et physique: Approche Multiechelles des Milieux Complexes Institut Jean Barriol Universite de Lorraine57070 Metz France

Mixed transition metal oxides （MTMOs） have received intensive attention as promising anode materials for lithium-ion batteries （LIBs） and sodium-ion batteries （SIBs）. In this work, we demonstrate a facile one-step water-bath method for the preparation of graphene oxide （GO） decorated Fe2（MoO4）3 （FMO） microflower composite （FMO/GO）, in which the FMO is constructed by numerous nanosheets. The resulting FMO/GO exhibits excellent electrochemical performances in both LIBs and SIBs. As the anode material for LIBs, the FMO/GO delivers a high capacity of 1,220 mAh·g^-1 at 200 mA·g^-1 after 50 cycles and a capacity of 685 mAh·g^-1 at a high current density of 10 A·g^-1. As the anode material for SIBs, the FMO/GO shows an initial discharge capacity of 571 mAh·g^-1 at 100 mA·g^-1, maintaining a discharge capacity of 307 mAh·g^-1 after 100 cycles. The promising performance is attributed to the good electrical transport from the intimate contact between FMO and graphene oxide. This work indicates that the FMO/GO composite is a promising anode for high-performance lithium and sodium storage.

关键词： Fe2(MoO4)3 microflowers anode lithium and sodium storage

SCALING PROPERTIES OF NUCLEAR MULTIFRAGMENTATION

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Chinese Science Bulletin 1991年第14期36卷 1162-1166页

作者：郑玉明 H. NG■ C. NG■ S. LERAY institute of Atomic Energy P.O.Box 275 18 Beijing 102413 PRC Division de physique Théorique Institut de Physique Nucléaire 91406 Orsay France Laboratoire National Saturne 91191 Gif sur Yvette Cedex France

Under given conditions, for instance, by heavy-ion collisions at intermediate and high energies, nuclei can break into several pieces. This new reaction mechanism is called nuclear multifragmentation. In analogy with a macroscopic system where a critical phenomenon takes place, nuclear multifragmentation also shows .the scaling properties. However, these properties can only be described partly by the restructured aggregation

关键词： nuclear multifragmentation the scaling property the critical exponent.

“Polymer-in-ceramic” based poly(ε-caprolactone)/ceramic composite electrolyte for all-solid-state batteries

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Journal of Energy Chemistry 2021年第1期30卷 318-325,I0010页

作者： Bohao Zhang Yulong Liu Jia Liu Liqun Sun Lina Cong Fang Fu Alain Mauger Christian M.Julien Haiming Xie Xiumei Pan National&Local United Engineering Laboratory for Power Battery Department of ChemistryNortheast Normal UniversityChangchun 130024JilinChina institut de Minéralogie de Physique des Matériaux et de Cosmochimie(IMPMC)Sorbonne UniversitéCNRS UMR 75904 Place Jussieu75005 ParisFrance

Inspired by the concept of "polymer-in-ceramic",a composite poly(ε-caprolactone)(PCL)/ceramic containing LiTFSI is prepared and investigated as a solid electrolyte for all-solid-state *** composite with the optimum concentration of 45 wt% LiTFSI and 75 wt% Li1.5Al0.5Ge1.5(PO4)3(LAGP,NASICON-type structure) exhibits a high ionic conductivity(σi=0.17 mS cm-1) at 30℃,a transference number of 0.30,and is stable up to 5.0 *** composite electrolyte is a flexible and self-standing ***-state LiFePO4//Li batteries with this composite electrolyte demonstrate excellent cycling stability with high discharge capacity of 157 mA h g-1,high capacity retention of 96% and coulombic efficiency of 98.5% after 130 cycles at 30℃ and 0.1 C *** electrochemical properties are better than other PCL-based allsolid-lithium batteries,and validate the concept of "polymer-in-ceramic" by avoiding the drawback of lower conductivity in prior "polymer-in-ceramic" electrolyte at high concentration of the ceramic.

关键词： All-solid-state electrolyte Polymer-in-ceramic Poly(ε-caprolactone)/LAGP composite High fluorinated SEI layer

Flocculation and magnetically-assisted sedimentation of size-sorted beidellite platelets mixed with maghemite nanoparticles

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Nano Research 2020年第11期13卷 3001-3011页

作者： Sofia Housni Sébastien Abramson Jean-Michel Guigner Pierre Levitz Laurent Michot Laboratoire de PHysico-chimie des Electrolytes et Nanosystèmes InterfaciauX(PHENIX UMR 8234 Sorbonne Université-CNRS)Sorbonne UniversitéParis75252France institut de Minéralogie de Physique des Matériaux et de Cosmochimie(IMPMC UMR 7590Sorbonne Université-IRD-CNRS-MNHN)Sorbonne UniversitéParis75252France

In this study,the flocculation and the subsequent decantation step of mixed suspensions of 10 nm-sizedγ-Fe_(2)O_(3) magnetic nanoparticles and 500 nm-sized beidellite clay platelets was *** work may find application in the field of water treatment,specifically the flocculation processes with magnetically assisted *** a short description of the preparation and characterization of the raw materials(nanoparticles and clays),the influence of several parameters(pH,concentrations of nanoparticles and clays etc.)on the amount of flocculated materials was examined,which gave information on the concentration ranges allowing a complete flocculation,together with a better understanding on the interactions between nanoparticles and clays responsible for *** optimal conditions for magnetically assisted settling were then determined by comparing for each sample sedimentation velocities under gravity and in the presence of a Nd-Fe-B ***,the complex multiscale structure of the flocs in water was explored,through the measurement of several bulk properties(zeta-potential and volume measurements,laser granulometry),while the organization of the materials at a microscopic scale was investigated by cryo-transmission electron microscopy(cryo-TEM)and small-angle X-ray scattering(SAXS).

关键词： magnetic separation nanoparticles clay flocculation decantation characterization

Measurement of iron characteristics under ramp compression

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Chinese Physics B 2017年第11期26卷 360-364页

作者：魏会冈 E Brambrink N Amadou A Benuzzi-Mounaix A Ravasio G Morard F Guyot T de Rességuier N Ozaki K Miyanishi 赵刚 M Koenig Key Laboratory of Optical Astronomy National Astronomical Observatories Chinese Academy of Sciences LULI-CNRS Ecole Polytechnique CEA Université Paris-Saclay Sorbonne Universités UPMC Univ Paris 06 CNRS laboratoire d'utilisation des lasers intenses (LULI) Département de physique Université Abdou Moumouni de Niamey institut de Minéralogie de Physique des Matériaux et de Cosmochimie (IMPMC) Sorbonne Universités-UPMC UMR CNRS 7590Muséum National d'Histoire Naturelle institut Pprime CNRS ENSMA Univ.Poitiers Graduate School of Engineering Osaka University

Laser-driven ramp compression was used to investigate iron characteristics along the isentropic path. The iterative Lagrangian analysis method was employed to analyze the free surface velocity profiles in iron stepped target measured with two VISARs. The onset stress for the α to ε phase transformation was determined from the sudden change in the sound velocity and was found over-pressurized compared to the static and shock results. The derived stress（26 GPa） and strain rate（up to 10-8 s^-1） are consistent with our previous experimental results. The stress-density relations were compared with those from previous ramp experiments and good agreements were found, which experimentally confirms the simulations,showing that iterative Lagrangian analysis can be applied to the ramp-compression data with weak shock.

关键词： isentropic compression iron phase transformation