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Journal of Bionic Engineering 2017年第3期14卷 468-475页

作者： Guilhem Godeau Marek dovcik Frederic Guittard Thierry darmanin universite cote d'azur NICE Lab 1MREDD Pare Valrose 061 O0 Nice France

Numerous exceptional properties can be observed in nature. Among these properties, parahydrophobic feature is of in- terest. This property describes material with high adhesion with water such as rose petals or gecko foot. Such kind of surface presents a real potential for applications in the field of water harvesting systems. In this work, we report a new synthetic strategy to mimic this property. Here, we combine three strategies in one, First, a monomer is electropolymerized in order to form the starting structured surface. Then, nanoparticles are grafted on the surface to increase the structuration and consequently to create the reactive surface. Finally, the grafted surface is post-functionalized （Huisgen reaction） with various aryl alkynes to control the surface chemistry and energy. This strategy allows to reach surfaces with both very high hydrophobic properties （0= 140~） and high water adhesion. This work also includes the surface wettability, roughness and morphology investigation in order to study the impact of the starting monomer structure and post-functionalization on the surface properties.

关键词： conductive polymers nanostructures click chemistry superhydrophobic adhesion

New insights into the control of symbiotic nitrogen fixation by carbon supply

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Molecular Plant 2023年第11期16卷 1724-1726页

作者： Marc Lepetit Renaud Brouquisse Institut Sophia Agrobiotech INRAEUniversite Cote d'AzurCNRS06903 Sophia-AntipolisFrance

The interaction between legumes and rhizobium-type bacteria allows symbiotic nitrogen fixation(SNF).Symbiosis takes place in a new root organ,the nodule,in which the plant host fuels the bacteria differentiated into bacteroids with dicarboxylic acids,enabling their active carbon and energy metabolisms(Figure 1).In addition,the plant maintains the bacteroids in microoxic conditions allowing the nitrogenase to reduce atmospheric nitrogen(N_(2))to ammonia(NH_(3)).Ammonia is not assimilated in the bacteroids but is subsequently transferred into the surrounding plant cells,where it combines with carbon(C)skeletons through the glutamine synthetase/glutamate synthase *** amino acids and/or ureides are finally distributed from the root to the to the whole plant.

关键词： Figure insight skeleton

Overcoming the limitations of 3d sensors with wide field of view metasurface-enhanced scanning lidar

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Advanced Photonics 2023年第4期5卷 51-65页

作者： Emil Marinov Renato Juliano Martins Mohamed Aziz Ben Youssef Christina Kyrou Pierre-Marie Coulon Patrice Genevet universite cote d’azur CNRSCRHEAValbonneFrance

Lidar, a technology at the heart of autonomous driving and robotic mobility, performs 3d imaging ofa complex scene by measuring the time of flight of returning light pulses. Many technological challenges,including enhancement of the observation field of view (FoV), acceleration of the imaging frame rate,improvement of the ambiguity range, reduction of fabrication cost, and component size, must besimultaneously addressed so that lidar technology reaches the performance needed to strongly impact theglobal market. We propose an innovative solution to address the problem of wide FoV and extendedunambiguous range using an acousto-optic modulator that rapidly scans a large-area metasurface *** further exploit a multiplexing illumination technique traditionally deployed in the context of telecommu-nication theory to extend the ambiguity range and to drastically improve the signal-to-noise ratio of themeasured signal. Compacting our metasurface-scanning lidar system to chip-scale dimension would opennew and exciting perspectives, eventually relevant to the autonomous vehicles and robotic industries.

关键词： light detection and ranging metasurfaces beam steering code division multiple access

Rodent models of fatty liver diseases

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Liver Research 2018年第1期2卷 3-13页

作者： Adeline Bertola universite cote d'azur INSERMCentre Mediterraneen de Medecine MoleculaireNiceFrance

Fatty liver diseases including alcoholic liver disease(ALd)and non-alcoholic fatty liver disease(NAFLd)are leading causes of chronic liver diseases *** and NAFLd encompass a broad spectrum of liver disorders ranging from simple steatosis to steatohepatitis,fibrosis,cirrhosis and superimposed hepatocellular *** considerable advances in our understanding of the pathogenesis of fatty liver diseases over the past 40 years,effective diagnostic,prognostic,and therapeutic tools are still *** use of animal models is crucial to investigate the cellular and molecular mechanisms underlying the development and progression of fatty liver diseases and develop novel therapeutic *** no animal model to date can faithfully replicate all the clinical and histological features of ALd or NAFLd,existing models can mimic specific aspects of human *** review provides an overview of the most commonly used and recently developed rodent models of ALd and NAFLd and discusses their major strengths and shortcomings.

关键词： Alcoholic liver disease(ALd) Non-alcoholic fatty liver disease(NAFLd) Animal models Fatty liver Inflammation and injury Fibrosis

Formation of Nanotubular Structures with Petal Effect by Soft-Template Electropolymerization of Benzotrithiophene with Hydrophilic Carboxyl Group

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Journal of Bionic Engineering 2022年第4期19卷 1054-1063页

作者： Maroua Khodja Imen Bousrih Mejda El Kateb Mohammed Beji Frederic Guittard Thierry darmanin Laboratory of Structural Organic Chemistry Faculty of Sciences of Tunis University of Tunis El Manar2092 TunisTunisia NICE Lab Universite Cote d’Azur06100 NiceFrance

The bioinspiration is one of the best ways to make a breakthrough in a field,and particularly in the wetting *** by natural species,such as rose petals and gecko foot,and previous researches,nanotubular structures are prepared here by soft-template electropolymerization in organic solvent and using an original benzotrithiophene with a hydrophilic carboxyl group,as the *** best results are obtained by cyclic voltammetry because of a much higher amount of gas bubbles released with this deposition *** nanoparticles and nanotubes are observed while the water content has an influence on the number of *** if the monomer has hydrophilic carboxyl group,the best films have both high hydrophobicity(apparent water contact angle up to 130.7°)and strong water adhesion(petal effect).These surfaces could be used in future in applications such as water harvesting systems.

关键词： Bioinspired Electropolymerization Hydrophobicity Nanostructures Nanotubes Wettability

Observation of supersymmetric pseudo-Landau levels in strained microwave graphene

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Light(Science & Applications) 2020年第1期9卷 611-617页

作者： Matthieu Bellec Charles Poli Ulrich Kuhl Fabrice Mortessagne Henning Schomerus Institut de Physique de Nice(INPHYNI) Universite Cote d’AzurCNRS06108 NiceFrance department of Physics Lancaster UniversityLancaster LA14YBUK

Using an array of coupled microwave resonators arranged in a deformed honeycomb lattice,we experimentally observe the formation of pseudo-Landau levels in the whole crossover from vanishing to large pseudomagnetic field *** result is achieved by utilising an adaptable setup in a geometry that is compatible with the pseudo-Landau levels at all field *** adopted approach enables us to observe the fully formed flat-band pseudo-Landau levels spectrally as sharp peaks in the photonic density of states and image the associated wavefunctions spatially,where we provide clear evidence for a characteristic nodal structure reflecting the previously elusive supersymmetry in the underlying low-energy *** particular,we resolve the full sublattice polarisation of the anomalous 0th pseudo-Landau level,which reveals a deep connection to zigzag edge states in the unstrained case.

关键词： microwave strained Landau

Surface Nanostructure Control with Poly(ethylene glycol)(PEG)Spacer by Templateless Electropolymerization

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Journal of Bionic Engineering 2021年第1期18卷 65-76页

作者： Imen Bousrih Mejda El Kateb Mohammed Beji Fréderic Guittard Thierry darmanin University of Tunis El Manar Laboratory of Structural Organic ChemistryFaculty of Sciences of TunisTunis 2092Tunisia universite cote d'azur NICE LabParc Valrose Nice 06100France

Controlling the shape of surface nanostructures is fundamental for various potential applications for cxamples,in water harvesting systems,liquid transportation or oil/water separation *** this paper,the creation of porous surface structures is made by a process called templateless electropolymerization,in which water(H_(2)0)is oxidizedreduced to form gas(O_(2)/H_(2))bubbles onto the surfaces and acting as soft template for the polymer *** the monomer(thieno[3,4-b]lhiophene)and the substituent(pyrene)constant,we demonstrate how a flexible PEG spacer can affect the structure *** the PEG spacer increases,the structures change frorm nanotubes(1d growth)to nanoribbons(2d)and after to hollow nanospheres(3d),which also affeets the wettig propertics.

关键词： nanostructures wettability hydrophobicity electrochemistry bioinspiration

Wetting Transition from Hydrophilic to Superhydrophobic over dendrite Copper Leaves Grown on Steel Meshes

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Journal of Bionic Engineering 2019年第4期16卷 719-729页

作者： Raziyeh Akbari Guilhem Godeau Mohammadreza Mohammadizadeh Frederic Guittard Thierry darmanin Supermaterials Research Lab(SRL) Department of PhysicsUniversity of TehranNorth KargarAv.14395-547TehranIran universite cote d'azur NICE LabParc Valrose 06100 NiceFrance

With the development of water purification technologies,the usage of superhydrophobic meshes is increased but the fabrication of durable and cost effective superhydrophobic meshes is still ***,the formation of hierarchical copper fractals on stainless steel meshes and their superhydrophobicity without any physical or chemical modification were *** addition,the improvement of superhydrophobicity of surfaces during storing in a glass bottle for a long time(>one year)is *** structures were prepared using electrodeposition method applying cyclic voltammetry and square pulse deposition approaches on stainless steel meshes with 50μm,100μm and 200μm pore *** prepared layers are a composition of copper with varying amounts of cuprite(Cu20)depending on deposition method and mesh pore ***-prepared cyclic voltammetry layer on 100μm mesh showed the parahydrophobicity with the contact angle of 154°but a large sliding *** one-year stored samples in the glass bottle showed superhydrophobicity with the contact angles larger than 150°and sliding angles in the range of 4°-20°.The observed improvement of superhydrophobicity is a great success in the realm of industrial water purification,while most other proposed samples by the others have problems related to the durability of superhydrophobicity.

关键词： superhydrophobic mesh dendrite nanostructure copper electrodeposition

Intermediate Common Model—The Solution to Separate Concerns and Responsiveness in dynamic Context-Aware System

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Journal of Computer and Communications 2017年第4期5卷 44-59页

作者： Gaetan Rey The Can do Jean-Yves Tigli Stéphane Lavirotte Nhan Le Thanh universite cote d'azur NiceFrance

Nowadays, many works are interested in adapting to the context without taking into account neither the responsiveness to adapt their solution, nor the ability of designers to model all the relevant concerns. Our paper provides a new architecture for context management that tries to solve both problems. This approach is also based on the analysis and synthesis of context-aware frameworks proposed in literature. Our solution is focus on a separation of contextual concerns at the design phase and preserves it as much as possible at runtime. For this, we introduce the notion of independent views that allow designers to focus on their domain of expertise. At runtime, the architecture is splitted in 2 independent levels of adaptation. The highest is in charge of current context identification and manages each view independently. The lowest handles the adaptation of the application according to the rules granted by the previous level.

关键词： Middleware Ubiquitous Computing Context-Aware System Software Composition Software Architecture

PM_(2.5) source apportionment in a French urban coastal site under steelworks emission influences using constrained non-negative matrix factorization receptor model

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Journal of Environmental Sciences 2016年第2期28卷 114-128页

作者： Adib Kfoury Frederic Ledoux Cloe Roche Gilles delmaire Gilles Roussel dominique Courcot Unite de Chimie Environnementale et Interactions sur le Vivant (UCEIV) EA4492 Universite du Littoral Cote d'Opale F-59140 Dunkerque France Laboratoire d'Informatique Signal et Image de la cote d'Opale (LISIC) EA4491 Universite du Littoral Cote d'Opale F-52228 Calais France

The constrained weighted-non-negative matrix factorization（CW-NMF） hybrid receptor model was applied to study the influence of steelmaking activities on PM_（2.5）（particulate matter with equivalent aerodynamic diameter less than 2.5 μm） composition in dunkerque,Northern France. Semi-diurnal PM_（2.5）samples were collected using a high volume sampler in winter 2010 and spring 2011 and were analyzed for trace metals, water-soluble ions, and total carbon using inductively coupled plasma – atomic emission spectrometry（ICP-AES）,ICP- mass spectrometry（ICP-MS）, ionic chromatography and micro elemental carbon analyzer. The elemental composition shows that NO_3^-, SO_4^（2-）, NH_4~＋and total carbon are the main PM_（2.5）constituents. Trace metals data were interpreted using concentration roses and both influences of integrated steelworks and electric steel plant were evidenced. The distinction between the two sources is made possible by the use Zn/Fe and Zn/Mn diagnostic ratios. Moreover Rb/Cr, Pb/Cr and Cu/Cd combination ratio are proposed to distinguish the ISW-sintering stack from the ISW-fugitive emissions. The a priori knowledge on the influencing source was introduced in the CW-NMF to guide the calculation. Eleven source profiles with various contributions were identified： 8 are characteristics of coastal urban background site profiles and 3 are related to the steelmaking activities. Between them,secondary nitrates, secondary sulfates and combustion profiles give the highest contributions and account for 93% of the PM_（2.5）concentration. The steelwork facilities contribute in about 2%of the total PM_（2.5）concentration and appear to be the main source of Cr, Cu, Fe, Mn, Zn.

关键词： PM_(2.5) Receptor modeling Non-negative matrix factorization Source apportionment Steelworks