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Journal of Rare Earths 2018年第1期36卷 1-41页

作者： jean-claude g.bünzli Ka-Leung Wong Institute of Chemical Sciences and Engineering Swiss Federal Institute of Technology Lausanne (EPFL) CH-1015 Lausanne Switzerland Department of Chemistry Hong Kong Baptist University Kowloon Tong Hong Kong China

Mechanoluminescence （ML） is the emission of light consecutive to a mechanical force or stress imposed to a crystalline material. Many inorganic and organic compounds present this phenomenon that is known for over 400 years. Lanthanide and uranyl salts were among the first substances investigated for this property. Mechanoluminescence, also referred to as triboluminescence, is often considered as being a badly understood phenomenon. In fact it is because of two main reasons. Firstly, a variety of different mechanical stresses, from simple rubbing, to applied pressure, crushing, impact of a weight, ultrasound, laser-generated shock wave, crystallization, dissolution of crystals, or even wind can trigger it. Secondly, ML is very sensitive to the purity and morphology of the sample： in inorganic compounds, generation of traps by doping ＂impurities＂（e.g. lanthanide ions） is responsible for light emission so that the exact composition of the sample has to be known to a very detailed level; for chelates, the crystallization conditions are crucial since they often generate extended networks of weak interactions that are instrumental in triggering ML when they are broken. In fact mechanisms of ML are relatively well known and theories and models often reproduce very well the experiments. Additionally, practical applications are at hand, for example stress, crack, and impact sensors based on SrAI204：Eu11 or Et3NH[Eu（dbm）4] are used to test structures and materials as diverse as road bridges, reinforced concrete elements, pressur- ized containers or airplane wings and to image the propagation of cracks or stress distribution. Military and security applications involve detecting the passage of vehicle or soldiers and producing counter- feiting inks while more joyful applications are luminous balls, wrapping papers and adhesive tapes. Not only bulk materials, but micro- and nanoparticles feature mechanoluminescent properties and single particle manipulation under an AFM allows

关键词： MechanoluminescenceRare earthsStress sensorsPressure sensorsImpact sensors

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Preface to the Special Issue of Rare Earth Luminescent Materials

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Journal of Rare Earths 2020年第5期38卷 I0006-I0006页

作者： jean-claude g.bünzli Xiaojun Wang Xueyuan Chen Institute of Chemical Sciences and Engineering Swiss Federal Institute of TechnologyLausanne(EPFL) Department of Physics Georgia Southern UniversityStatesboroGA 30460USA CAS Key Laboratory of Design and Assembly of Functional Nanostructures and Fujian Key Laboratory of NanomaterialsFujian Institute of Research on the Structure of MatterChinese Academy of SciencesFuzhou350002China

Lanthanide photonics,and more particularly lanthanide luminescence,is at the heart of applications as diverse as lighting devices,displays,lasers,optical fibers and associated telecommunication networks,security marki... 详细信息

关键词： lighting fibers networks

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Lanthanide-doped nanoscintillators

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Light(Science & Applications) 2022年第10期11卷 2264-2266页

作者： jean-claude georges bünzli institute of Chemical Sciences and Engineering Swiss Federal Institute of TechnologyLausanne(EPFL)LausanneSwitzerland Department of biomedical Engineering Southern University of Science and Technology(SUSTech)ShenzhenChina

Lanthanide-doped nanoscintillators are taking the lead in several important fields including radiation detection,biomedicine,both at the level of diagnosis and therapy,and information encoding.

关键词： diagnosis Lanthanide ill

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Lanthanide NIR luminescence for telecommunications, bioanalyses and solar energy conversion

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Journal of Rare Earths 2010年第6期28卷 824-842页

作者： jean-claude g. bünzli Svetlana V. Eliseeva cole Polytechnique Fédérale de Lausanne Institute of Chemical Sciences and Engineering WCU Professor Korea University Center for Next Generation Photovoltaic Systems Katholieke Universiteit Leuven Department of Chemistry Laboratory of Coordination Chemistry

Present-day advanced technologies heavily rely on the exciting magnetic and spectroscopic properties of lanthanide ions. In particular, their ability to generate well-characterized and intense near-infrared (NIR) luminescence is exploited in any modern fiber-optic telecommunication network. In this feature article, we first summarize the whereabouts underlying the design of highly luminescent NIR molecular edifices and materials. We then focus on describing the main trends in three applications related to this spectral range: telecommunications, biosciences, and solar energy conversion. In telecommunications, efforts concentrate presently on getting easily processable polymer-based waveguide amplifiers. Upconversion nanophosphors emitting in the visible after NIR excitation are now ubiquitous in many bioanalyses while their application to bio-imaging is still in its early stages; however, highly sensitive NIR-NIR systems start to be at hand for both in vitro and in vivo imaging, as well as dual probes combining magnetic resonance and optical imaging. Finally, both silicon-based and dye-sensitized solar cells benefit from the downconversion and upconversion capabilities of lanthanide ions to harvest UV and NIR solar light and to boost the overall quantum efficiency of these next-generation devices.

关键词： lanthanide luminescence near-infrared luminescence telecommunications bioanalysis solar energy conversion solar cell upconversion downconversion

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New Opportunities for Lanthanide Luminescence

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Journal of Rare Earths 2007年第3期25卷 257-274页

作者： jean-claude g. bünzli Steve Comby Anne-Sophie Chauvin Caroline D. b. Vandevyver Laboratory of Lanthanide Supramolecular Chemistry Ecole Polytechnique Fédérale de Lausanne BCH 1402 CH-1015 Lausanne Switzerland

Trivalent lanthanide ions display fascinating optical properties. The discovery of the corresponding elements and their first industrial uses were intimately linked to their optical properties. This relationship has been kept alive until today when many high-technology applications of lanthanide-containing materials such as energy-saving lighting devices, displays, optical fibers and amplifiers, lasers, responsive luminescent stains for biomedical analyses and in cellulo sensing and imaging, heavily rely on the brilliant and pure-color emission of lanthanide ions. In this review we first outlined the basics of lanthanide luminescence with emphasis on f-f transitions, the sensitization mechanisms, and the assessment of the luminescence efficiency of lanthanide-containing emissive molecular edifices. Emphasis was then put on two fast developing aspects of lanthanide luminescence： materials for telecommunications and light emitting diodes, and biomedical imaging and sensing. Recent advances in NIR-emitting materials for plastic amplifiers and waveguides were described, together with the main solutions brought by researchers to minimize non-radiative deactivation of excited states. The demonstration in 1999 that erbium tris（8-hydroxyquinolinate） displayed a bright green emission suitable for organic light emitting diodes （OLEDs） was followed by realizing that in OLEDs, 25% of the excitation energy leads to singlet states and 75% to triplet states. Since lanthanide ions are good triplet quenchers, they now also play a key role in the development of these lighting devices. Luminescence analyses of biological molecules are among the most sensitive analytical techniques known. The long lifetime of the lanthanide excited states allows time-resolved spectroscopy to be used, suppressing the sample autofluorescence and reaching very low detection limits. Not only visible lanthanide sensors are now ubiquitously provided in medical diagnosis and in cell imaging, but the feasibili

关键词： lanthanide luminescence sensitization near infrared telecommunications organic light emitting diode (OLED) time-resolved luminescence in cellulo sensing cell imaging rare earths

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The synergy between the payloads on the ASO-S mission

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Research in Astronomy and Astrophysics 2019年第11期19卷 115-126页

作者： jean-claude Vial Institut d’Astrophysique Spatiale University Paris-Sud

This paper addresses the improved science resulting from joint observations performed by the different instruments onboard the Advanced Space-based Solar Observatory(ASO-S)mission along with ancillary instruments on missions flying at the same *** first describes the three major instruments along with their stated *** it presents some basic science issues concerning jointly observed flares,coronal mass ejections(CMEs)and eruptive prominences(EPs).Each physical candidate(magnetic reconnection,instability,hard X-ray emission and magnetic coronal field topology)is discussed in terms of its signature and identification with ASO-S *** importance of Lyαdetection and non-LTE modeling is *** instrumental and science challenges are briefly discussed.

关键词： techniques imagery,polarimetry-Sun eruptions,flares,coronal mass ejections

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Emerging role of machine learning in light-matter interaction

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Light(Science & Applications) 2019年第1期8卷 445-451页

作者： Jiajia Zhou bolong Huang Zheng Yan jean-claude g.bunzli Faculty of Science Institute for Biomedical Materials and DevicesUniversity of TechnologySydneyNSW 2007Australia Department of Applied biology and Chemical Technology The Hong Kong Polytechnic UniversityHong HumKowloonHong Kong SARChina Faculty of Engineering and IT Centre for Artificial IntelligenceUniversity of TechnologySydneyNSW 2007Australia Swiss Federal Institute of Technology Lausanne(EPFL)ISICLausanneSwitzerland

Machine learning has provided a huge wave of innovation in multiple fields,including computer vision,medical diagnosis,life sciences,molecular design,and instrumental *** perspective focuses on the implementation of machine learning in dealing with light-matter interaction,which governs those fields involving materials discovery,optical characterizations,and photonics *** highlight the role of machine learning in accelerating technology development and boosting scientific innovation in the aforementioned *** provide future directions for advanced computing techniques via multidisciplinary efforts that can help to transform optical materials into imaging probes,information carriers and photonics devices.

关键词： learning interaction dealing

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g~n filling orbicular N-sided holes using periodic b-spline surfaces

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Science China(Information Sciences) 2011年第7期54卷 1383-1394页

作者： PAUL jean-claude School of Software Tsinghua University Key Laboratory for Information System Security Ministry of Education of China Tsinghua National Laboratory for Information Science and Technology Institute National de Recherche en Informatique et en Automatique

The orbicular N -sided hole filling problem is usually introduced by filleting an end-point of a part with large *** existing methods based on quadrilateral partition or constrained-optimization can rarely generate high-order continuous blending surfaces under these *** paper first reparameterizes the boundary of the specified orbicular N -sided hole to ensure the compatibility of neig.boring cross-boundary derivatives on the connecting points,preserving their g n *** we compute the control points of the periodic b-spline surface using the sufficient g n continuity condition on the pole and the algorithm of extending parametric *** method generates single blending surface,which can be converted into standard bspline surface by adding knots without introducing *** only elevates the degree of the boundary by *** construction method is simple and efficient,without iteration nor large-scale matrix *** achieves g n continuity under compatible *** blending examples underline its feasibility and practicability.

关键词： CAD periodic b-spline surface polar coordinates N -sided hole filling g n continuity

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Regulation of Sulfate Uptake and Assimilation——the Same or Not the Same？

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Molecular Plant 2010年第2期3卷 314-325页

作者： jean-claude Davidian Stanislav Kopriva Unite mixte de recherche Biochimie et Physiologie Molculaire des Plantes Montpellier SupAgro/CNRS/INRA/UM2 2 place Pierre Viala 34060 MontpellierCedex 2 France Department of Metabolic biology John Innes Centre Norwich NR4 7UH UK

Plant take up the essential nutrient sulfur as sulfate from the soil, reduce it, and assimilate into bioorganic compounds, with cysteine being the first product. both sulfate uptake and assimilation are highly regulated by the demand for the reduced sulfur, by availability of nutrients, and by environmental conditions. In the last decade, great prog- ress has been achieved in dissecting the regulation of sulfur metabolism. Sulfate uptake and reduction of activated sulfate, adenosine 5＇-phosphosulfate （APS）, to sulfite by APS reductase appear to be the key regulatory steps. Here, we review the current knowledge on regulation of these processes, with special attention given to similarities and differences.

关键词： Metabolic regulation nutrient and metal transport nutrition primary metabolism sulfate uptake sulfur metabolism.

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ON MAXWELL EQUATIONS WITH THE TRANSPARENT bOUNDARY CONDITION

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Journal of Computational Mathematics 2008年第3期26卷 284-296页

作者： Zhiming Chen jean-claude Nédélec LSEC ICMSEC Academy of Mathematics and Systems Science Chinese Academy of Sciences Beijing 100080 China Centre de Mathématiques Appliquées Ecole Polytechnique 91228 Palaiseau Cedex France

In this paper we show the well-posedness and stability of the Maxwell scattering problem with the transparent boundary condition. The proof depends on the well-posedness of the time-harmonic Maxwell scattering problem... 详细信息

关键词： Electromagnetic scattering Well-posedness Stability

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