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Recent advances in heterogeneous catalysis of solar-driven carbon dioxide conversion

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Journal of Environmental Sciences 2024年第6期140卷 165-182页

作者： Jun Xu Farzaneh Arabpour Roghabadi Ying Luo Vahid Ahmadi Qian Wang Zheng Wang Hong He State Key Joint Laboratory of Environment Simulation and Pollution Control Research Center for Eco-Environmental SciencesChinese Academy of SciencesBeijing 100085China College of Chemistry and Chemical Engineering Henan Polytechnic UniversityJiaozuoHenan 454000China Department of Process Engineering Faculty of Chemical EngineeringTarbiat Modares UniversityTehranIran Optoelectronics and nanophotonics Research group Faculty of Electrical and Computer EngineeringTarbiat Modares UniversityTehranIran Graduate School of Engineering Nagoya UniversityFuro-choChikusa-kuNagoya 464-8603Japan

Solar-driven carbon dioxide(CO_(2))conversion including photocatalytic(PC),photoelectrochemical(PEC),photovoltaic plus electrochemical(PV/EC)systems,offers a renewable and scalable way to produce fuels and high-value chemicals for environment and energy *** review summarizes the basic fundament and the recent advances in the field of solar-driven CO_(2)*** the visible-light absorption is an important strategy to improve solar energy conversion *** separation and migration of photogenerated charges carriers to surface sites and the surface catalytic processes also determine the photocatalytic *** engineering including co-catalyst loading,defect engineering,morphology control,surface modification,surface phase junction,and Z-scheme photocatalytic system construction,have become fundamental strategies to obtain high-efficiency *** to photocatalysis,these strategies have been applied to improve the conversion efficiency and Faradaic efficiency of typical PEC *** PV/EC systems,the electrode surface structure and morphology,electrolyte effects,and mass transport conditions affect the activity and selectivity of electrochemical CO_(2)***,the challenges and prospects are addressed for the development of solar-driven CO_(2)conversion system with high energy conversion efficiency,high product selectivity and stability.

关键词： Solar-driven CO_(2)reduction Photocatalytic system Photoelectrochemical system Photovoltaic plus electrochemical system Surface/interface engineering

Single crystal growth and characterization of 166-type magnetic kagome metals

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Chinese Physics B 2024年第9期33卷 145-150页

作者： Huangyu Wu Jinjin Liu Yongkai Li Peng Zhu Liu Yang Fuhong Chen Deng Hu Zhiwei Wang Centre for Quantum Physics Key Laboratory of Advanced Optoelectronic Quantum Architecture and Measurement(MOE)School of PhysicsBeijing Institute of TechnologyBeijing 100081China Beijing Key Laboratory of nanophotonics and Ultrafine Optoelectronic Systems Beijing Institute of TechnologyBeijing 100081China Beijing Institute of Technology Zhuhai 519000China Material Science Center Yangtze Delta Region Academy of Beijing Institute of TechnologyJiaxing 314011China

Kagome magnets were predicted to be a good platform to investigate correlated topology band structure,Chern quantum phase,and geometrical frustration due to their unique lattice *** we reported single crystal growth of 166-type kagome magnetic materials,including HfMn_(6)Sn_(6),ZrMn_(6)Sn_(6),GdMn_(6)Sn_(6)and GdV_(6)Sn_(6),by using the flux method with Sn as the *** them,HfMn_(6)Sn_(6)and ZrMn_(6)Sn_(6)single crystals were grown for the first time.X-ray diffraction measurements reveal that all four samples crystallize in HfFe6Ge6-type hexagonal structure with space group P6/*** samples show metallic behavior from temperature dependence of resistivity measurements,and the dominant carrier is hole,except for GdV6Sn6 which is electron *** samples have magnetic order with different transition temperatures,HfMn_(6)Sn_(6),ZrMn_(6)Sn_(6)and GdV_(6)Sn_(6)are antiferromagnetic with TN of 541 K,466 K and 4 K respectively,while GdMn_(6)Sn_(6)is ferrimagnetic with the critical temperature of about 470 *** study will enrich the research platform of magnetic kagome materials and help explore the novel quantum phenomena in these interesting *** dataset of specific crystal structure parameters for HfMn_(6)Sn_(6)are available in Science Data Bank,with the link.

关键词： kagome metal single crystal growth crystal structure physical property

Compact multi-mode silicon-nitride micro-ring resonator with low loss

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Advanced Photonics 2023年第5期5卷 5-6页

作者： Kaixuan Ye David Marpaung University of Twente Nonlinear Nanophotonics GroupEnschedeThe Netherlands

Silicon nitride(Si_(3)N_(4))waveguides,recognized for their large transparency window and low propagation loss,have been widely applied in microwave photonics,integrated lasers,and optical *** towards even lower loss in the Si_(3)N_(4)platform would enable large-scale photonic integrated circuits and reduce the overall size,weight,power,and cost(SWaP-C).Current strategies to reduce the loss of silicon nitride waveguides include thermal annealing,multipass lithography,or using deuterated silane as the *** effective,these approaches are either incompatible with the CMOS process or currently not available from the foundry.

关键词： resonator lithography mode

Metal to insulator transition for conducting polymers in plasmonic nanogaps

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Light(Science & Applications) 2024年第1期13卷 23-32页

作者： Yuling Xiong Rohit Chikkaraddy Charlie Readman Shu Hu Kunli Xiong Jialong Peng Qianqi Lin Jeremy J.Baumberg nanophotonics Centre Cavendish LaboratoryDepartment of PhysicsUniversity of CambridgeCambridgeCB30HEUK School of Physics&Astronomy University of BirminghamEdgbastonBirminghamUK College of Advanced Interdisciplinary Studies and Hunan Provincial Key Laboratory of Novel Nano-Optoelectronic Information Materials and Devices National University of Defense TechnologyChangshaChina Hybrid Materials for Opto-Electronics group Department of Molecules and MaterialsMESA+Institute for NanotechnologyMolecules Center and Center for Brain-Inspired Nano SystemsFaculty of Science and TechnologyUniversity of TwenteEnschedeNetherlands

Conjugated polymers are promising material candidates for many future applications in flexible displays, organic circuits, and sensors. Their performance is strongly affected by their structural conformation including both electrical and optical anisotropy. Particularly for thin layers or close to crucial interfaces, there are few methods to track their organization and functional behaviors. Here we present a platform based on plasmonic nanogaps that can assess the chemical structure and orientation of conjugated polymers down to sub-10 nm thickness using light. We focus on a representative conjugated polymer, poly(3,4-ethylenedioxythiophene) (PEDOT), of varying thickness (2-20 nm) while it undergoes redox in situ. This allows dynamic switching of the plasmonic gap spacer through a metal-insulator transition. Both dark-field (DF) and surface-enhanced Raman scattering (SERS) spectra track the optical anisotropy and orientation of polymer chains close to a metallic interface. Moreover, we demonstrate how this influences both optical and redox switching for nanothick PEDOT devices.

关键词： transition insulator conjugated

Cubosome nanoparticles for enhanced delivery of mitochondria anticancer drug elesclomol and therapeutic monitoring via sub-cellular NAD(P) H multi-photon fluorescence lifetime imaging

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Nano Research 2019年第5期12卷 991-998页

作者： Ana R.Faria Oscar F.Silvestre Christian Maibohm Ricardo M.R.Adao Bruno F.B.Silva Jana B.Nieder Department of nanophotonics Ultrafast Bio- and Nanophotonics GroupINL - International Iberian Nanotechnology LaboratoryAv.Mestre Jose Veiga s/n4715-330 BragaPortugal Department of Life Sciences INL-International Iberian Nanotechnology LaboratoryAv.Mestre Jose Veiga s/n4715-330 BragaPortugal

Elesclomol (ELC) is an anticancer drug inducing mitochondria cytotoxicity through reactive oxygen ***,for the first time,we encapsulate the poorly water soluble ELC in monoolein-based cubosomes stabilized with Pluronic *** uptake and nanocarrier accumulation close to the mitochondria with sub-micrometer distance is identified via three-dimensional (3D) confocal microscopy and edge-to-edge compartment *** monitor the therapeutic effect of the ELC nanocarrier,we apply for the first time,label-free time-lapse multi-photon fluorescence lifetime imaging microscopy (MP-FLIM) to track NAD(P)H cofactors with sub-cellular resolution on live cells exposed to an anticancer *** in vitro cytotoxicity is verified when loading the pre-complexed ELC with copper (ELC-Cu).Importantly,for equivalent copper concentration,cubosomes loaded with ELC-Cu show higher cytotoxicity compared to the free *** novel nanocarrier shows promising features for systemic ELC-Cu administration,and furthermore we establish the MP-FLIM technique for the assessment of anticancer drug delivery systems.

关键词： cubosomes mitoch on dria reactive oxyge n species elesclomol NAD(P)H fluoresce nee lifetime anticancer therapy

Slow light bimodal interferometry in onedimensional photonic crystal waveguides

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Light(Science & Applications) 2021年第2期10卷 154-165页

作者： Luis Torrijos-Morán Amadeu Griol Jaime García-Rupérez nanophotonics Technology Center Universitat Politècnica de Valencia46022 ValenciaSpain

Strongly influenced by the advances in the semiconductor industry,the miniaturization and integration of optical circuits into smaller devices has stimulated considerable research efforts in recent *** other structures,integrated interferometers play a prominent role in the development of photonic devices for on-chip applications ranging from optical communication networks to point-of-care analysis ***,it has been a longstanding challenge to design extremely short interferometer schemes,as long interaction lengths are typically required for a complete modulation *** approaches,including novel materials or sophisticated configurations,have been proposed to overcome some of these size limitations but at the expense of increasing fabrication complexity and ***,we demonstrate for the first time slow light bimodal interferometric behaviour in an integrated single-channel one-dimensional photonic *** proposed structure supports two electromagnetic modes of the same polarization that exhibit a large group velocity ***,an over 20-fold reduction in the higher-order-mode group velocity is experimentally shown on a straightforward all-dielectric bimodal structure,leading to a remarkable optical path reduction compared to other conventional ***,we experimentally demonstrate the significant performance improvement provided by the proposed bimodal photonic crystal interferometer in the creation of an ultra-compact optical modulator and a highly sensitive photonic sensor.

关键词： interferometer polarization modulator

Organometal halide perovskite quantum dots:synthesis,optical properties,and display applications

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Chinese Chemical Letters 2016年第8期27卷 1124-1130,1464页

作者： Gao-Ling Yang Hai-Zheng Zhong Beijing Key Laboratory of nanophotonics and Ultrafine Optoelectronic Systems School of Materials Science & Engineering

In recent two years,organometal halide perovskites quantum dots are emerging as a new member of the nanocrystals *** the chemical point of view,these perovskites quantum dots can be synthesized either by classical hot-injection technique for inorganic semiconductor quantum dots or the reprecipitation synthesis at room temperature for organic *** a physical point of view,the observed large exciton binding energy,well self-passivated surface,as well as the enhanced nonlinear properties have been of great interest for fundamental *** the application point of view,these perovskites quantum dots exhibit high photoluminescence quantum yields,wide wavelength tunability and ultra-narrow band emissions,the combination of these superior optical properties and low cost fabrication makes them to be suitable candidates for display *** this short review,we introduce the synthesis,optical properties,the prototype light-emitting devices,and the current important research tasks of halide perovsktie quantum dots,with an emphasis on CH_3NH_3PbX_3（X= CI,Br,I） quantum dots that developed in our group.

关键词： Halide perovskite Quantum dots Photoluminescence Electroluminescence Display

Plasmonic tweezers: for nanoscale optical trapping and beyond

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Light(Science & Applications) 2021年第4期10卷 475-515页

作者： Yuquan Zhang Changjun Min Xiujie Dou Xianyou Wang Hendrik Paul Urbach Michael G.Somekh Xiaocong Yuan nanophotonics Research Center Shenzhen Key Laboratory of Micro-Scale Optical Information Technology&Institute of Microscale OptoelectronicsShenzhen UniversityShenzhen 518060China Optics Research group Delft University of TechnologyLorentzweg 12628G DelftThe Netherlands

Optical tweezers and associated manipulation tools in the far field have had a major impact on scientific and engineering research by offering precise manipulation of small *** recently,the possibility of performing manipulation with surface plasmons has opened opportunities not feasible with conventional far-field optical *** use of surface plasmon techniques enables excitation of hotspots much smaller than the free-space wavelength;with this confinement,the plasmonic field facilitates trapping of various nanostructures and materials with higher *** successful manipulation of small particles has fostered numerous and expanding *** this paper,we review the principles of and developments in plasmonic tweezers techniques,including both nanostructure-assisted platforms and structureless *** methods and evaluation criteria of the techniques are presented,aiming to provide a guide for the design and optimization of the *** most common novel applications of plasmonic tweezers,namely,sorting and transport,sensing and imaging,and especially those in a biological context,are critically ***,we consider the future of the development and new potential applications of this technique and discuss prospects for its impact on science.

关键词： trapping offering optical

Quantum-dot Semiconductor Optical Amplifiers in State Space Model

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计算物理 2013年第4期30卷 605-612页

作者： Hussein Taleb Kambiz Abedi Saeed Golmohammadi Department of Electrical Engineering Faculty of Electrical and Computer Engineering Shahid Beheshti University G. C. Evin ***Tehran Iran nanophotonics group School of Engineering-Emerging Technologies University of Tabriz Tabriz *** Iran

A state space model(SSM) is derived for quantum-dot semiconductor optical amplifiers(QD-SOAs).Rate equations of QD-SOA are formulated in the form of state update equations,where average occupation probabilities along QD-SOA cavity are considered as state variables of the *** show that SSM calculates QD-SOA′s static and dynamic characteristics with high accuracy.

关键词： quantum-dot rate equation model semiconductor optical amplifiers state space model