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General strategy for evaluating the d-band center shift and ethanol oxidation reaction pathway towards Pt-based electrocatalysts

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Science China Chemistry 2023年第1期66卷 279-288页

作者： Jin-Hong Zheng Guang Li Jun-Ming Zhang Ningyan Cheng Li-Fei Ji Jian Yang Jialin Zhang Bin-Wei Zhang Yan-Xia Jiang Shi-Gang Sun State Key Laboratory of Physical Chemistry of Solid Surfaces Department of ChemistryCollege of Chemistry and Chemical EngineeringXiamen UniversityXiamen 361005China School of Chemistry and Chemical Engineering Chongqing UniversityChongqing 401331China Center of Advanced Energy Technology and Electrochemistry Institute of Advanced Interdisciplinary StudiesChongqing UniversityChongqing 400044China Key Laboratory of Magnetic Molecules&Magnetic Information Materials Ministry of Education School of Chemical and Material ScienceShanxi Normal UniversityTaiyuan 030031China Information Materials and Intelligent Sensing Laboratory of Anhui Province Key Laboratory of Structure and Functional Regulation of Hybrid Materials of Ministry of EducationInstitutes of Physical Science and Information TechnologyAnhui UniversityHefei 230039China

The catalytic performance of Pt-based catalysts depends sensitively on their d-band ***,there are still huge challenges to evaluate their d-band centers from experimental technologies,and modulate them to analyze their selectivity in ethanol oxidation reaction(EOR).Here,Pt1Au1alloy supported on the commercial carbon material(Pt_(1)Au_(1)/C)is employed as a typical example to investigate its d-band center shift of surface Pt,and as electrocatalysts to study its selectivity towards ***,a highly reliable in situ Fourier-transform infrared spectroscopy CO-probe strategy is developed to characterize the d-band center shift of surface *** modified electronic effect and site effect of Pt_(1)Au_(1)/C dictated the adsorption configuration of intermediate species and the OH species coverage,thereby influencing its *** importantly,we developed a universal cyclic voltammetry peak differentiation fitting method as an electrochemical analysis technique to investigate CO_(2)selectivity,which is potentially extendable to other Pt-based electrocatalysts.

关键词： PtAu in situ FTIRS d-band center ethanol oxidation reaction CV peak differentiation fitting method

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Metal-Organic Framework-Derived Metallic Carbon with Record High Radon Gas Capture Performance

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CCS Chemistry 2024年第7期6卷 1789-1797页

作者： Shicheng Gong Yi Tao Lixi Chen Qiuting Xu Junhao Lu Fuyin Ma Xia Wang Guodong Li Jun Wan Guoxun Ji Linfeng He Xiaohui Yu Duo Zhang Xuhui Sun Zhifang Chai Shuao Wang State Key Laboratory of Radiation Medicine and Protection School for Radiological and Interdisciplinary Sciences(RAD-X)and Collaborative Innovation Center of Radiation Medicine of Jiangsu Higher Education InstitutionsSoochow UniversitySuzhou 215123 Institute of Functional Nano&Soft Materials Laboratory(FUNSOM) Jiangsu Key Laboratory for Carbon-Based Functional Materials and DevicesJiangsu Key Laboratory of Advanced Negative Carbon TechnologiesSoochow UniversitySuzhou 215123 School of Environment and Material Engineering Yantai UniversityYantai 264005 Xi’an Research Institute of Hi-Technology Hong Qing TownXi’an 710025 Shanghai Institute of Measurement and Testing Technology Shanghai 201203 Engineering Institute of Advanced Manufacturing and Modern Equipment Technology Jiangsu UniversityZhenjiang 212013

Developing efficient adsorbents for radon(Rn)capture from the ambient environment is of paramount importance for public ***,it poses a great challenge due to the chemical inertness and extremely low molar concentration of Rn in ***,we report a zeolite imidazolate frameworkderived metallic carbon adsorbent(Zn@NPC)with record high Rn removal performance under ambient *** one-step pyrolysis,the prepared Zn@NPC possesses pores with a preference for Rn and atomically dispersed Zn sites,achieving a high Rn removal efficiency that doubles in adsorption coefficient(9.47 L·g^(−1))and triples in adsorption kinetic coefficient(20.25 mL·g^(−1)·min^(−1))over the benchmark Rn adsorbent coconut activated *** functional theory calculations elucidate the important role of the metal polarization effect,which cooperates with the pore size confinement effect to boost the overall Rn adsorption *** work launches a promising alternative for practical Rn capture.

关键词： radon removal metal-organic frameworks microporous carbon synergistic effect dynamic adsorption

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A tactfully designed photothermal agent collaborating with ascorbic acid for boosting maxillofacial wound healing

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National Science Review 2025年第2期12卷 244-258页

作者： Yuxin Qian Yiting Gao Dong Wang Shixuan Zhang Qiuxia Luo Guogang Shan Mengmeng Lu Dingyuan Yan Ben Zhong Tang Ming Zhang Department of Oral Implantology The Affiliated Stomatological Hospital of Nanjing Medical University.State Key Laboratory Cultivation Base of Research Prevention and Treatment for Oral Diseases.Jiangsu Province Engineering Research Center of Stomatological Translational Medicine Nanjing Medical University Institute of Functional Material Chemistry and National&Local United Engineering Lab for Power Battery Faculty of ChemistryNortheast Normal University Center for AIE Research Guangdong Provincial Key Laboratory of New Energy Materials Service Safety College of Materials Science and EngineeringShenzhen University School of Science and Engineering Shenzhen Institute of Aggregate Science and Technology The Chinese University of Hong Kong Shenzhen(CUHK-Shenzhen)

Maxillofacial injuries that may cause severe functional and aesthetic damage require effective and immediate management due to continuous exposure to diverse microbial populations. Moreover, drug resistance,biofilm formation, and oxidative stress significantly impede timely bacterial removal and immune function,making the exploration of advanced materials for maxillofacial wound healing an appealing yet highly challenging task. Herein, a near-infrared photothermal sterilization agent was designed, encapsulated with liposomes and coated with ascorbic acid known for its antioxidant and immune-regulatory functions. The resulting nanoparticles, 4TPE-C6T-TD@AA, effectively neutralize reactive oxygen species generated by lipopolysaccharides, facilitate the conversion of pro-inflammatory M1 macrophages to anti-inflammatory M2 macrophages, and eliminate >90% of Staphylococcus aureus and Escherichia coli by disrupting bacterial physiological functions upon exposure to 808 nm laser irradiation. In vivo experiments demonstrate that 4TPE-C6T-TD@AA rapidly eliminates bacteria from infected wounds in the maxillofacial region of rats,and significantly promotes healing in S. aureus-infected wounds by enhancing collagen formation and modulating the inflammatory microenvironment. In conclusion, this study presents a promising therapeutic strategy for effectively combating bacterial infections and excessive inflammation in treating maxillofacial injuries.

关键词： maxillofacial wound healing photothermal sterilization anti-inflammation

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Flat Band and Z_(2)Topology of Kagome Metal CsTi_(3)Bi_(5)

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Chinese Physics Letters 2023年第3期40卷 31-35页

作者：王渊刘以轩郝占阳程文静邓竣泽王郁欣顾雨豪马小明戎洪涛张发远郭抒张成成江志诚杨逸尘刘万领姜琦刘正太叶茂沈大伟刘毅崔胜涛王乐刘才林君浩刘影蔡永青朱金龙陈朝宇梅佳伟 Shenzhen Institute for Quantum Science and Engineering(SIQSE)and Department of Physics Southern University of Science and Technology(SUSTech)Shenzhen 518055China Beijing National Laboratory for Condensed Matter Physics and Institute of PhysicsChinese Academy of SciencesBeijing 100190China State Key Laboratory of Functional Materials for Informatics and Center for Excellence in Superconducting Electronics Shanghai Institute of Microsystem and Information TechnologyChinese Academy of SciencesShanghai 200050China National Synchrotron Radiation Laboratory University of Science and Technology of ChinaHefei 230029China

The simple kagome-lattice band structure possesses Dirac cones,flat band,and saddle point with van Hove singularities in the electronic density of states,facilitating the emergence of various electronic *** we report a titanium-based kagome metal CsTi_(3)Bi_(5)where titanium atoms form a kagome network,resembling its isostructural compound CsV_3Sb_*** properties including the magnetization,resistance,and heat capacity reveal the conventional Fermi liquid behavior in the kagome metal CsTi_(3)Bi_(5)and no signature of superconducting or charge density wave(CDW)transition anomaly down to 85 m *** angle-resolved photoemission spectroscopy measurements reveal multiple bands crossing the Fermi level,consistent with the first-principles *** flat band formed by the destructive interference of hopping in the kagome lattice is observed *** to Cs V_(3)Sb_(5),the van Hove singularities are pushed far away above the Fermi level in CsTi_(3)Bi_(5),in line with the absence of ***,the first-principles calculations identify the nontrivial Z_(2)topological properties for those bands crossing the Fermi level,accompanied by several local band *** results suppose CsTi_(3)Bi_(5)as a complementary platform to explore the superconductivity and nontrivial band topology.

关键词： Fermi nontrivial titanium

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Elemental composition x-ray fluorescence analysis with a TES-based high-resolution x-ray spectrometer

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Chinese Physics B 2023年第9期32卷 67-73页

作者：吴秉骏夏经铠张硕傅强章辉谢晓明刘志 State Key Laboratory of Functional Materials for Informatics Shanghai Institute of Microsystem and Information TechnologyChinese Academy of SciencesShanghai 200050China Center for Transformative Science ShanghaiTech UniversityShanghai 201210China School of Physical Science and Technology ShanghaiTech UniversityShanghai 201210China Center for Excellence in Superconducting Electronics Chinese Academy of SciencesShanghai 200050China University of Chinese Academy of Sciences Beijing 100049China

The accurate analysis of the elemental composition plays a crucial role in the research of functional *** emitting characteristic x-ray fluorescence(XRF)photons can be used for precisely discriminating the specified *** detection accuracy of conventional XRF methodology using semiconductor detector is limited by the energy resolution,thus posing a challenge in accurately scaling the actual energy of each XRF *** adopt a novel high-resolution x-ray spectrometer based on the superconducting transition-edge sensor(TES)for the XRF spectroscopy measurement of different *** including high energy resolution,high detection efficiency and precise linearity of the new spectrometer will bring significant benefits in analyzing elemental composition via *** this paper,we study the Ledge emission line profiles of three adjacent rare earth elements with the evenly mixed sample of their oxide components:terbium,dysprosium and *** orders of magnitude better energy resolution are obtained compared to a commercial silicon drift *** this TES-based spectrometer,the spectral lines overlapped or interfered by background can be clearly distinguished,thus making the chemical component analysis more accurate and quantitative.A database of coefficient values for the line strength of the spectrum can then be constructed *** with the novel XRF spectrometer and an established coefficient database,a direct analysis of the composition proportion of a certain element in an unknown sample can be achieved with high accuracy.

关键词： x-ray emission spectra and fluorescence superconducting transition-edge sensor rare earth elements chemical composition analysis

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Titanium carbide nanosheets with defect structure for photothermal-enhanced sonodynamic therapy

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Bioactive materials 2022年第2期7卷 409-419页

作者： Guangqiang Li Xiaoyan Zhong Xianwen Wang Fei Gong Huali Lei Yangkai Zhou Chengfei Li Zhidong Xiao Guoxi Ren Liang Zhang Zhiqiang Dong Zhuang Liu Liang Cheng College of Science State Key Laboratory of Agricultural MicrobiologyHuazhong Agricultural UniversityWuhan430070China Institute of Functional Nano&Soft Materials(FUNSOM) Jiangsu Key Laboratory for Carbon-Based Functional Materials&DevicesSoochow UniversitySuzhou215123China Department of Toxicology School of Public HealthMedical College of Soochow UniversitySuzhou215123China State Key Laboratory of Functional Materials for Informatics Shanghai Institute of Microsystem and Information TechnologyChinese Academy of SciencesShanghai200050China College of Biomedicine and Health College of Life Science and TechnologyHuazhong Agricultural UniversityWuhanHubei430070China

Sonodynamic therapy(SDT)has attracted widespread interest in biomedicine,owing to its novel and noninvasive therapeutic method triggered by ultrasound(US).Herein,the Ti_(3)C_(2) MXene nanosheets(Ti_(3)C_(2) NSs)are developed as good sonosensitizers via a two-step method of chemical exfoliation and high-temperature *** the high-temperature treatment,the oxygen defect of Ti_(3)C_(2) MXene nanosheets(H-Ti_(3)C_(2) NSs)is greatly ***,the electron(e^(-))and hole(h^(+))generated by US can be separated faster due to the improved degree of oxidation,and then the recombination of e^(-)-h^(+)can be prevented with the abundant oxygen defect under US irradiation,which induced the sonodynamic efficiency greatly to improve around 3.7-fold compared with Ti_(3)C_(2) NSs without high-temperature *** PEGylation,the H-Ti_(3)C_(2)-PEG NSs show good stability and *** vitro studies exhibit that the inherent property of mild photothermal effect can promote the endocytosis of H-Ti_(3)C_(2)-PEG NSs,which can improve the SDT *** vivo studies further display that the increased blood supply by the mild photothermal effect can significantly relieve hypoxia in the tumor microenvironment,showing photothermal therapy(PTT)enhanced *** importantly,the H-Ti_(3)C_(2)-PEG NSs can be biodegraded and excreted out of the body,showing no significant long-term *** work develops the defective H-Ti_(3)C_(2) NSs as high-efficiency and safe sonosensitizers for photothermal-enhanced SDT of cancer,extending the biomedical application of MXene-based nanoplatforms.

关键词： Ti_(3)C_(2)MXenes Oxygen defect Sonosensitizers Sonodynamic therapy Biosafety

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Ultra-broadband and low loss Silicon Photonic Power Splitter with Enhanced Coupling of Subwavelength Waveguides 3

Ultra-broadband and low loss Silicon Photonic Power Splitter...

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3rd International Conference on Laser, Optics, and Optoelectronic Technology, LOPET 2023

作者： Wu, Longsheng Li, Hanyue Wu, Aimin State Key Laboratory of Functional Materials for Informatics Shanghai Institute of Microsystem and Information Technology Chinese Academy of Sciences Shanghai200050 China Center of Materials Science and Optoelectronics Engineering University of Chinese Academy of Sciences Beijing100049 China

ISBN: (纸本)9781510667624

An on-chip optical power splitter is a crucial component for optical signal processing, widely used to implement Mach-Zehnder Interferometer, 1×2 switches, and optical arrays for various photonic integrated circuit (PIC) applications. In this paper, we present a tapered silicon waveguide power splitter with assisted subwavelength gratings (SWGs) that enhances coupling between waveguides and relaxes the critical dimensions requirement of the devices, with a taper tip width of 100 nm. The three-dimensional Finite-Difference-Time-Domain (3D-FDTD) simulation results demonstrate that the splitter has a low loss of only 0.1 dB over an ultra-broad wavelength range from 1200 nm to 1700 nm. The dependence of the performance on geometry variations, including tip width, gap spacing, waveguide width, and thickness of the device layer, is also investigated to illustrate the fabrication tolerance. The power splitter is also proved to be temperature-insensitive. With the advantages of low loss, ultra-broadband, fabrication-tolerant, temperature-insensitive, and relaxed critical dimensions (≥100 nm), the proposed power splitter is a promising practical building block for large-scale PICs. © 2023 SPIE.

关键词： Silicon photonics

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Ultra-Large FSR Filter Based on Bragg Grating-Subwavelength Grating Slot Microring Resonator 3

Ultra-Large FSR Filter Based on Bragg Grating-Subwavelength ...

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3rd International Conference on Laser, Optics, and Optoelectronic Technology, LOPET 2023

作者： Li, Hanyue Wang, Ruxue Wu, Aimin State Key Laboratory of Functional Materials for Informatics Shanghai Institute of Microsystem and Information Technology Chinese Academy of Sciences Shanghai200050 China Center of Materials Science and Optoelectronics Engineering University of Chinese Academy of Sciences Beijing100049 China

ISBN: (纸本)9781510667624

Microring resonators (MRRs) are widely used in optical filters due to their compact size, high Q, and narrow linewidth. However, traditional MRR-based high sensitivity sensors suffer from narrow free spectral range (FSR), which limits the number of channels for detecting substances and causes interference with the identification of the center wavelength when the refractive index of analytes changes significantly. In this paper, we propose an ultra-large FSR and high sensitivity filter utilizing subwavelength grating slot microring resonator with inner silicon blocks with different widths, achieving FSR of 95.5 nm and refractive index sensitivity of 743 nm/RIU. And a lab-on-chip system comprised of eight channels-based filters is presented, promoting the development of silicon photonics in the detecting resolution of small refractive index changes of analytes to 3.60×10-4 RIU and multiple analytes simultaneously. © 2023 SPIE.

关键词： Silicon photonics

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Efficient coupling interface for hybrid integration of DFB lasers on 3μm SOI waveguide platform 3

Efficient coupling interface for hybrid integration of DFB l...

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3rd International Conference on Laser, Optics, and Optoelectronic Technology, LOPET 2023

作者： Lv, Dongsheng Liu, Chenyang Ding, Yanyue Wu, Aimin State Key Laboratory of Functional Materials for Informatics Shanghai Institute of Microsystem and Information Technology Chinese Academy of Sciences Shanghai200050 China Center of Materials Science and Optoelectronics Engineering University of Chinese Academy of Sciences Beijing100049 China

ISBN: (纸本)9781510667624

An optical coupling interface is a crucial component in Silicon Photonics (SiPh) technology for optical signal transmission. It is widely utilized to achieve on-chip light sources and optical input/output for SiPh chips. In this work, we report a coupling interface with a focusing structure based on the 3μm SOI waveguide platform to minimize mode profile mismatch, resulting in a high coupling efficiency and relatively large -1dB alignment tolerances across a wide bandwidth. Simulation results show that our design achieved a high transmission of greater than -0.85dB across the 1500-1600nm range, with a maximum of -0.847dB. When the laser is positioned 1.5μm away from the waveguide facet, the -1dB tolerances are ±0.62μm and ±0.45μm in the horizontal and vertical directions, respectively. Additionally, the interface is safe for lasers as it has a return loss (caused by reflection) of less than -30dB. © 2023 SPIE.

关键词： Silicon photonics

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Multiple surface states,nontrivial band topology,and antiferromagnetism in GdAuAl_(4)Ge_(2)

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Chinese Physics B 2023年第7期32卷 515-520页

作者：张成成王渊张发远戎洪涛蔡永青王乐马小明郭抒陈仲佳王亚南江志诚杨逸尘刘正太叶茂林君浩梅佳伟郝占阳谢子娟陈朝宇 Shenzhen Institute for Quantum Science and Engineering(SIQSE)and Department of Physics Southern University of Science and Technology(SUSTech)Shenzhen 518055China Songshan Lake Materials Laboratory Dongguan 523000China Beijing National Laboratory for Condensed Matter Physics and Institute of Physics Chinese Academy of SciencesBeijing 100190China State Key Laboratory of Functional Materials for Informatics and Center for Excellence in Superconducting Electronics Shanghai Institute of Microsystem and Information TechnologyChinese Academy of SciencesShanghai 200050China International School of Microelectronics Dongguan University of TechnologyDongguan 523000China

Magnetic topological states of matter provide a fertile playground for emerging topological physics and *** current main focus is on materials whose magnetism stems from 3d magnetic transition elements,e.g.,MnBi_(2)Te_(4),Fe_(3)Sn_(2),and Co_(3)Sn_(2)S_(2).In contrast,topological materials with the magnetism from rare earth elements remain largely *** we report rare earth antiferromagnet GdAuAl_(4)Ge_(2)as a candidate magnetic topological *** resolved photoemission spectroscopy(ARPES)and first-principles calculations have revealed multiple bulk bands crossing the Fermi level and pairs of low energy surface *** to the parity and Wannier charge center analyses,these bulk bands possess nontrivial Z2 topology,establishing a strong topological insulator state in the nonmagnetic ***,the surface band pairs exhibit strong termination dependence which provides insight into their *** results suggest GdAuAl_(4)Ge_(2)as a rare earth platform to explore the interplay between band topology,magnetism and f electron correlation,calling for further study targeting on its magnetic structure,magnetic topology state,transport behavior,and microscopic properties.

关键词： magnetic topological material surface state ARPES topological invariant

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