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Atomic density disturbance rejection in atomic gyroscopes via faraday polarimetric decoupling
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作者 Zehua Liu Yifan Yan +5 位作者 Haoying Pang Xinhui Liu Jixi Lu Xusheng Lei Zhuo Wang Wei Quan 《Defence Technology(防务技术)》 2026年第1期1-10,共10页
Atomic spin gyroscopes are promising candidates for next-generation inertial navigation due to extremely high theoretical precision,relatively small size among atomic gyroscopes,and promising potential for miniaturiza... Atomic spin gyroscopes are promising candidates for next-generation inertial navigation due to extremely high theoretical precision,relatively small size among atomic gyroscopes,and promising potential for miniaturization.In particular,the spin-exchange relaxation-free(SERF)atomic gyroscope relies on optical pumping to polarize atoms,enabling rotation sensing through the Faraday optical rotation angle(FORA).However,fluctuations in atomic density introduce systematic errors in FORA measurements,limiting long-term stability.We present a data-driven decoupling method that isolates atomic density fluctuations from the FORA signal by modeling spatially resolved light absorption in the vapor cell.The model accounts for the spatial distribution of spin polarization in the pump-light interaction volume,density-dependent relaxation rates,wall-induced relaxation,and polarization diffusion,and is implemented within a finite-element framework.Compared to the conventional Lambert-Beer law,which assumes one-dimensional homogeneity,our approach captures the full threedimensional density and polarization distribution,significantly improving the accuracy of light absorption modeling.The resulting absorption-density maps are used to train a feedforward neural network,yielding a high-precision estimator for atomic density fluctuations.This estimator enables the construction of a decoupling equation that separates the density contribution from the FORA signal.Experimental validation shows that this method improves the bias instability atσ(100 s)of the gyroscope was improved by 73.1%compared to traditional platinum-resistance-based stabilization.The proposed framework is general and can be extended to other optical pumping-based sensors,such as optically pumped magnetometers. 展开更多
关键词 atomic gyroscope SERF gyroscope atomic density Optically pumped sensors
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A Survey of Empirical Atomic Potentials for Inorganic Perovskites
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作者 Zi-Hao Xu Chuan-Xin Cui Jin-Wu Jiang 《Acta Mechanica Solida Sinica》 2026年第2期121-132,共12页
Inorganic perovskites,a class of materials with the general formula ABX3,exhibit a wide range of electronic,dielectric,and structural properties,making them pivotal in energy,electronics,and catalysis applications.Acc... Inorganic perovskites,a class of materials with the general formula ABX3,exhibit a wide range of electronic,dielectric,and structural properties,making them pivotal in energy,electronics,and catalysis applications.Accurate atomistic simulations of these materials require accurate interatomic potentials that capture both short-range and long-range interactions.While first-principles methods are of high accuracy,empirical and machine learning potentials remain essential for large-scale simulations.This survey categorizes and reviews the atomic potentials used in inorganic perovskite modeling based on how they treat electrostatic interactions:potentials without charges,potentials with constant charges,and potentials with variable charges.Given the ionic nature of perovskites,we emphasize the importance of charge treatment,and each class of potentials is discussed in detail with representative examples,functional forms,and application scenarios.For comparison,we perform molecular dynamics simulations to calculate the critical temperature for the phase transition of the perovskite CsPbI_(3) with available empirical potentials,highlighting their strengths and limitations in capturing structural evolution.Finally,we outline future directions for developing more accurate and transferable atomic potentials for inorganic perovskites.We hope that this review can serve as a guiding resource for researchers who are starting to perform simulations for inorganic perovskites. 展开更多
关键词 Inorganic perovskites atomic potentials Molecular dynamics
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Atomically Dispersed Pt-Ru Dual-Atom Catalysts for Efficient Low-Temperature CO Oxidation Reaction
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作者 Yanan Qi Hongqiu Chen +12 位作者 Feng Hong Xiangbin Cai Zhehan Ying Jiangyong Diao Zhimin Jia Jiawei Chen Ning Wang Shengling Xiang Xiaowen Chen Guodong Wen Bo Sun Geng Sun Hongyang Liu 《Nano-Micro Letters》 2026年第5期816-830,共15页
Single-atom catalysts(SACs)have demonstrated excellent performance in heterogeneous catalytic reactions owing to their maximized atomic efficiency,distinctive geometric,and electronic configurations.However,the effica... Single-atom catalysts(SACs)have demonstrated excellent performance in heterogeneous catalytic reactions owing to their maximized atomic efficiency,distinctive geometric,and electronic configurations.However,the efficacy of SACs remains limited for certain reactions requiring simultaneous activation of multiple reactants over metallic active sites.Herein,we report an atomically dispersed Pt1Ru1 dual-atom pair site anchored on nanodiamond@graphene(ND@G)for CO oxidation.The Pt1Ru1 dual-atom catalyst shows an exceptional turnover frequency(TOF)of 17.6.10^(-2)s^(-1)at significantly lower temperature(30℃),achieving a tenfold increase in TOF compared to singleatom Pt1/ND@G catalyst(1.5.10^(-2)s^(-1))and surpassing to previously reported Pt-based catalysts under similar conditions.Moreover,the catalyst demonstrates excellent stability,maintaining its activity for 40 h at 80℃without significant deactivation.The superior catalytic performance of Pt-Ru dual-atom catalysts is attributed to the synergistic effect between Pt and Ru atoms with enhanced metallicity for improving simultaneous adsorption and activation of CO and O_(2),and the tuning of conventional competitive reactant adsorption into a non-competitive pathway over dual-atom pair sites.The present work manifests the advantages of dual-atom pair sites in heterogeneous catalysis and paves the way for precise design of catalysts at the atomic scale. 展开更多
关键词 CO oxidation atomically dispersed Dual-atom catalysts Pt-Ru Synergistic effect
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Enhanced atomic localization and precision control in a four-level atomic medium via transmission spectrum
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作者 Muhammad Idrees Fatima Ghulam Kakepoto Zareen A Khan 《Communications in Theoretical Physics》 2026年第1期51-60,共10页
In this article,we introduce a new theoretical approach to improve the accuracy of twodimensional(2D)atomic localization within a tripod-type,four-level atomic system by analyzing its transmission spectrum.In this met... In this article,we introduce a new theoretical approach to improve the accuracy of twodimensional(2D)atomic localization within a tripod-type,four-level atomic system by analyzing its transmission spectrum.In this method,the atom interacts with two orthogonal standing-wave fields and a weak probe field.By examining how the weak probe field passes through the system,we can determine the atom position.Our analysis reveals the presence of both double and sharply defined single localized peaks in the transmission spectrum,which correspond to specific positions of the atom.Importantly,we achieve ultra-high-resolution atomic localization with accuracy confined to a region smaller thanλ/32×λ/32.This level of precision is a significant improvement compared to earlier methods,which had lower localization accuracy.The increased precision is due to the complex interaction between the atom and the carefully controlled standing-wave and probe fields,which allows for precise control over the atom's position.The implications of this work are significant,especially for applications like nano-lithography,where precise atomic placement is essential,and for laser cooling technologies,where better atomic localization could lead to more effective cooling processes and improved manipulation of atomic states. 展开更多
关键词 atomic localization transmission spectrum standing-wave fields ultra-high resolution nano-lithography
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Atomic ensemble-assisted ground-state cooling of a rotating mirror in a triple Laguerre-Gaussian cavity
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作者 Xiaoxuan Li Junfei Chen Qingxia Mu 《Chinese Physics B》 2026年第1期482-490,共9页
We propose a novel cooling protocol within a triple-Laguerre-Gaussian cavity optomechanical system,which is designed to suppress the thermal vibrations of a rotating mirror to reach its quantum ground state.The system... We propose a novel cooling protocol within a triple-Laguerre-Gaussian cavity optomechanical system,which is designed to suppress the thermal vibrations of a rotating mirror to reach its quantum ground state.The system incorporates two auxiliary cavities and an atomic ensemble coupled to a Laguerre-Gaussian rotational cavity.By carefully selecting system parameters,the cooling process of the rotating mirror is significantly enhanced,while the heating process is effectively suppressed,enabling efficient ground-state cooling even in the unresolved sideband regime.Compared to previous works,our scheme reduces the stringent restrictions on auxiliary systems,making it more experimentally feasible under broader parameter conditions.These findings provide a robust approach for achieving ground-state cooling in mechanical resonators. 展开更多
关键词 triple Laguerre-Gaussian cavity rotating mirror ground-state cooling atomic ensemble rotational dynamics
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Constructing Atomically Dispersed Bimetallic Electrocatalyst by a Topologically Confined Pre-Anchoring Strategy for Enhanced Oxygen Reduction Reaction and Zn-Air Battery
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作者 Yawei Zhang Xia Li Ziqian Xue 《Energy & Environmental Materials》 2026年第1期257-262,共6页
The development of atomically dispersed multi-metallic catalysts is imperative for tailoring catalytic performance and elucidating structure-activity relationships.However,synthesizing such precisely engineered archit... The development of atomically dispersed multi-metallic catalysts is imperative for tailoring catalytic performance and elucidating structure-activity relationships.However,synthesizing such precisely engineered architectures while maintaining atomic dispersion of distinct metal centers remains a formidable challenge due to thermodynamic instability and synthetic complexity.We herein propose a topological confinement pre-anchoring strategy via pre-anchoring spatially resolved Zn/Fe dual-metal sources in a structurally engineered metal-organic framework precursor to synthesize atomically dispersed ZnFe bimetallic single-atom catalysts.Extended X-ray absorption fine structure measurements and X-ray absorption near-edge structure reveal that the atomically dispersed Zn/Fe metal sites and electronic redistribution in ZnFe bimetallic single-atom catalysts.The ultrahigh surface area,hierarchical pore,and synergistic effect between Zn/Fe can greatly favor the exposure of the active site,mass transport,and improvement of intrinsic activity.Consequently,the ZnFe bimetallic single-atom catalyst demonstrates superior oxygen reduction reaction performance,achieving a half-wave potential of 0.86 V and delivering a kinetic current density of 10.1 mA cm^(-2)at 0.85 V versus RHE in 0.1 m KOH electrolyte.These metrics not only surpass those of commercial Pt/C,but also rival the highest-performing catalysts reported to date.The Zn-air battery built with ZnFe bimetallic single-atom catalyst exhibits high power density(278.5 mW cm^(-2))and specific discharging capacities(657 mAh g^(-1)).This work provides a new design pathway for constructing atomically dispersed multi-metal electrocatalysts for high-performance energy-related applications. 展开更多
关键词 bimetallic single atom catalyst metal-organic frameworks oxygen reduction reaction Zn-air battery
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Co-optimization of linear gain and dynamic range for atomic superheterodyne receivers based on homodyne readout
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作者 Chuan Qu Dongqin Guo Jian Zhang 《Chinese Physics B》 2026年第1期416-423,共8页
Rydberg-atom-based superheterodyne receivers integrate self-calibration,high sensitivity,a wide operational frequency range,and phase/frequency resolved detection capabilities,demonstrating broad application prospects... Rydberg-atom-based superheterodyne receivers integrate self-calibration,high sensitivity,a wide operational frequency range,and phase/frequency resolved detection capabilities,demonstrating broad application prospects as nextgeneration microwave receivers.Linear gain and linear dynamic range(LDR)are critical metrics for assessing receiver sensitivity and demodulation fidelity,respectively.We numerically solve the four-level master equation and then employ particle swarm optimization(PSO)algorithm to co-optimize linear gain and LDR in atomic superheterodyne receivers based on balanced homodyne detection.Further,we systematically account for dominant dephasing mechanisms in the simulation,encompassing spontaneous decay,transit dephasing,collision dephasing,laser linewidth dephasing,and Doppler averaging.Homodyne readout utilizes both the real and imaginary parts of polarizability for sensing.In the case of the photon shot noise limit,its signal-to-noise ratio(SNR)expression resembles that of direct optical-intensity readout.However,the inherent coherent subtraction operation in homodyne detection significantly suppresses common-mode noise,while appropriately increasing the reference beam power enhances the gain in practical experiments.Indeed,this co-optimization problem,characterized by a high-dimensional variable space,two objectives,and non-convexity,is well-suited for solution by PSO.In addition,probe and coupling detuning contribute equivalently to polarizability and compensate for each other owing to Doppler averaging,thereby reducing the optimization variable space by one.By adopting a product form of linear gain and LDR as the fitness function,the PSO achieves rapid convergence.Here,the effectiveness of the PSO results is verified via the total harmonic distortion(THD).The relative error-based LDR calculation method we proposed efficiently measures receiver response linearity with consuming fewer computational resources.This research is expected to offer valuable insights into enhancing the performance of Rydberg-atom-based superheterodyne receivers. 展开更多
关键词 atomic superheterodyne receivers linear gain linear dynamic range balanced homodyne readout
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Oxide Semiconductor for Advanced Memory Architectures:Atomic Layer Deposition,Key Requirement and Challenges
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作者 Chi‑Hoon Lee Seong‑Hwan Ryu +3 位作者 Taewon Hwang Sang‑Hyun Kim Yoon‑Seo Kim Jin‑Seong Park 《Nano-Micro Letters》 2026年第6期80-124,共45页
Oxide semiconductors(OSs),introduced by the Hosono group in the early 2000s,have evolved from display backplane materials to promising candidates for advanced memory and logic devices.The exceptionally low leakage cur... Oxide semiconductors(OSs),introduced by the Hosono group in the early 2000s,have evolved from display backplane materials to promising candidates for advanced memory and logic devices.The exceptionally low leakage current of OSs and compatibility with three-dimensional(3D)architectures have recently sparked renewed interest in their use in semiconductor applications.This review begins by exploring the unique material properties of OSs,which fundamentally originate from their distinct electronic band structure.Subsequently,we focus on atomic layer deposition(ALD),a core technique for growing excellent OS films,covering both basic and advanced processes compatible with 3D scaling.The basic surface reaction mechanisms—adsorption and reaction—and their roles in film growth are introduced.Furthermore,material design strategies,such as cation selection,crystallinity control,anion doping,and heterostructure engineering,are discussed.We also highlight challenges in memory applications,including contact resistance,hydrogen instability,and lack of p-type materials,and discuss the feasibility of ALD-grown OSs as potential solutions.Lastly,we provide an outlook on the role of ALD-grown OSs in memory technologies.This review bridges material fundamentals and device-level requirements,offering a comprehensive perspective on the potential of ALD-driven OSs for next-generation semiconductor memory devices. 展开更多
关键词 Oxide semiconductor(OS) atomic layer deposition(ALD) Memory applications
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In-situ post-doping plasma process during atomic layer deposition of Al-doped TiO_(2) for sub-nanometer lattice ordering and defect annihilation
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作者 Gyuha Lee Youngmin Sunwoo +5 位作者 Hyong June Kim Geongu Han Jeongmin Oh Sangwon Lee Byungjo Kim Jihwan An 《International Journal of Extreme Manufacturing》 2026年第1期654-668,共15页
Atomic layer deposition(ALD)is extensively used to fabricate doped dielectrics due to its ability to deposit conformal films with atomic-scale thickness control.Al-doped TiO_(2)(ATO)is a promising high-k dielectric fo... Atomic layer deposition(ALD)is extensively used to fabricate doped dielectrics due to its ability to deposit conformal films with atomic-scale thickness control.Al-doped TiO_(2)(ATO)is a promising high-k dielectric for dynamic random access memory(DRAM)applications,offering a high dielectric constant with a remarkable leakage-lowering effect by Al acceptor doping.However,ATO fabrication via conventional supercycle-based ALD suffers from severe crystallinity loss during the growth of TiO_(2) upon Al doping owing to the dopant-induced lattice disorder.In addition,Al doping cannot reduce any inherent O vacancies(V_(O))of TiO_(2),although the original purpose of doping was to address the n-type nature caused by V_(O).To resolve these limitations,we propose a single-step,in-situ Ar/O_(2) post-doping plasma(PDP)process immediately after the Al dopant incorporation.Using the PDP process,simultaneous atomic-scale dopant migration-mediated crystallization and V_(O) annihilation were successfully initiated.Thus,the surface concentration of the dopant decreased,reducing the dopant-induced lattice distortion,while promoting the highly crystallized seed layer-like surface.Consequently,strong rutile-phase recovery was accompanied by enhanced lattice-matched growth.In addition,the PDP process significantly lowers the V_(O)-to-lattice oxygen ratio by facilitating the recombination between reactive O species and V_(O),increasing the corresponding 0.4 e V of conduction band offset(CBO).Despite the common trade-off between the dielectric constant and leakage,the Pt/PDP-ATO/Ru capacitor exhibited a simultaneous 30%increase in dielectric constant and up to a 1.6-order reduction in leakage current density. 展开更多
关键词 atomic layer deposition(ALD) Al-doped TiO_(2)(ATO) post-doping plasma(PDP)process dielectric constant crystallization
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Chlorinated antibiotics electrocatalytic dechlorination by construction of Co_(3)O_(4)/g-C_(3)N_(4) heterojunctions for stable atomic hydrogen production
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作者 Ge Song Huizhong Wu +5 位作者 Chaohui Zhang Xuechun Wang Shuaishuai Li Jiangli Sun Xiuwu Zhang Minghua Zhou 《Chinese Chemical Letters》 2026年第2期713-720,共8页
Chlorinated antibiotics pose great challenges in efficient removal,while for the first time,this work greatly enhanced their electrocatalytic dechlorination performance by construction of non-noble metal Co_(3)O_(4)/g... Chlorinated antibiotics pose great challenges in efficient removal,while for the first time,this work greatly enhanced their electrocatalytic dechlorination performance by construction of non-noble metal Co_(3)O_(4)/g-C_(3)N_(4) heterojunctions to improve process cost-effectiveness.The Co_(3)O_(4)/g-C_(3)N_(4) heterojunction demonstrated an effective removal of 93.6%thiamphenicol(TAP)within 45 min,with the rate constant(0.0584 min^(-1))that was 2.4 and 2.8 times that of Co_(3)O_(4) and g-C_(3)N_(4) alone,respectively.The formation of heterojunctions facilitated electron transfer,enriched the electron density on Co_(3)O_(4),and enhanced the adsorption of pollutants as well as the desorption of degradation intermediates.The enhanced production of atomic hydrogen(H*)of Co_(3)O_(4)/g-C_(3)N_(4),which increased by 13.6-28.2 times,contributed more to pollutant removal(64.0%),much higher than that of Co_(3)O_(4)(37.3%)and g-C_(3)N_(4)(6.1%).The energy barrier for H_(2) formation on Co_(3)O_(4)/g-C_(3)N_(4)(0.75 eV)was higher than that on Co_(3)O_(4)(-1.84 eV),supporting that it could stabilize H*and inhibit the formation of H_(2).The Co_(3)O_(4)/g-C_(3)N_(4) heterojunction exhibited stable performance with less impact by pH and co-existing ions,and posed effectiveness for the dechlorination of typical chlorinated antibiotics.This study offers an efficient and sustainable strategy for constructing heterojunctions to enhance the performance of non-noble metal catalysts in electrocatalytic dechlorination. 展开更多
关键词 Electrocatalytic dechlorination CO_(3)O_(4)/g-C_(3)N_(4) HETEROJUNCTIONS atomic hydrogen Chlorinated antibiotics
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Atomic-scale investigation on the evolution of T_(1) precipitates in an aged Al-Cu-Li-Mg-Ag alloy 被引量:1
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作者 Xinyue Zhao Juan Ding +2 位作者 Daihong Xiao Lanping Huang Wensheng Liu 《Journal of Materials Science & Technology》 2025年第6期139-148,共10页
The T_(1)(Al_(2) CuLi)phase is one of the most effective strengthening nanoscale-precipitate in Al-Cu alloys with Li.However,its formation and evolution still need to be further clarified during aging due to the compl... The T_(1)(Al_(2) CuLi)phase is one of the most effective strengthening nanoscale-precipitate in Al-Cu alloys with Li.However,its formation and evolution still need to be further clarified during aging due to the complex precipitation sequences.Here,a detailed investigation has been carried out on the atomic struc-tural evolution of T_(1) precipitate in an aged Al-Cu-Li-Mg-Ag alloy using state-of-the-art Cs-corrected high-angle annular dark field(HAADF)-coupled with integrated differential phase contrast(iDPC)-scanning transmission electron microscopy(STEM)and energy-dispersive X-ray spectroscopy(EDXS)techniques.An intermediate T_(1)’phase between T_(1p) and T_(1) phase,with a crystal structure and orientation rela-tionship consistent with T_(1),but exhibiting different atomic occupancy and chemical composition was found.We observed the atomic structural transformation from T_(1p) to T_(1)’phase(fcc→hcp),involving only 1/12<112>Al shear component.DFT calculation results validated our proposed structural models and the precipitation sequence.Besides,the distributions of minor solute elements(Ag,Mg,and Zn)in the pre-cipitates exhibited significant differences.These findings may contribute to a further understanding of the nucleation mechanism of T_(1) precipitate. 展开更多
关键词 PRECIPITATE Chemical composition atomic structure Aluminium alloy STEM
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Atomically dispersed Ru on flower-like In_(2)O_(3) to boost CO_(2) hydrogenation to methanol 被引量:1
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作者 Mengyao Xu Fei Liu +4 位作者 Shike Liu Jun Ma Mengqin Yao Xiaodan Wang Jianxin Cao 《Journal of Materials Science & Technology》 2025年第18期289-301,共13页
Metal-based catalysts are prevalent in the CO_(2) hydrogenation to methanol owing to their remarkable catalytic activity.Herein,Ru/In_(2)O_(3) catalysts with different morphologies obtained by doping Ru into In_(2)O_(... Metal-based catalysts are prevalent in the CO_(2) hydrogenation to methanol owing to their remarkable catalytic activity.Herein,Ru/In_(2)O_(3) catalysts with different morphologies obtained by doping Ru into In_(2)O_(3) with irregular,rod-like,and flower-like morphologies are used for catalytic CO_(2) hydrogenation to methanol.Results indicate that the flower-like Ru/In_(2)O_(3)(Ru/In_(2)O_(3)-F)exhibits higher catalytic performance than Ru/In_(2)O_(3) with other morphologies,achieving a 12.9%CO_(2) conversion,74.02%methanol selectivity,and 671.36 mg_(MeOH) h^(−1) g_(cat)^(−1) methanol spatiotemporal yield.Furthermore,Ru/In_(2)O_(3)-F maintains its catalytic stability over 200 h at 5 MPa and 290℃.The promotional effect mainly stems from the fact that electronic structure of Ru can be effectively adjusted by modulating the morphology of In_(2)O_(3).The strong interaction between atomically dispersed Ru and In_(2)O_(3)-F enhances the structural stability of Ru,inhibiting the agglomeration of the catalyst during the reaction process.Furthermore,density-functional theory calculations reveal that highly dispersed Ru atoms not only perform efficient and rapid electronic gain and loss processes,facilitating the catalytic activation of H_(2) into H intermediates.It also enables the generated reactive H to rapidly overflow to the surrounding In sites to participate in CO_(2) reduction.These findings provide a theoretical basis for the development of high-performance catalysts for CO_(2) hydrogenation. 展开更多
关键词 CO_(2)hydrogenation METHANOL Morphology atomic dispersion RUTHENIUM
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Atomic surface of diamond induced by novel green photocatalytic chemical mechanical polishing with high material removal rate 被引量:1
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作者 Zhibin Yu Zhenyu Zhang +6 位作者 Zinuo Zeng Cheng Fan Yang Gu Chunjing Shi Hongxiu Zhou Fanning Meng Junyuan Feng 《International Journal of Extreme Manufacturing》 2025年第2期661-676,共16页
Atomic surfaces are strictly required by high-performance devices of diamond.Nevertheless,diamond is the hardest material in nature,leading to the low material removal rate(MRR)and high surface roughness during machin... Atomic surfaces are strictly required by high-performance devices of diamond.Nevertheless,diamond is the hardest material in nature,leading to the low material removal rate(MRR)and high surface roughness during machining.Noxious slurries are widely used in conventional chemical mechanical polishing(CMP),resulting in the possible pollution to the environment.Moreover,the traditional slurries normally contain more than four ingredients,causing difficulties to control the process and quality of CMP.To solve these challenges,a novel green CMP for single crystal diamond was developed,consisting of only hydrogen peroxide,diamond abrasive and Prussian blue(PB)/titania catalyst.After CMP,atomic surface is achieved with surface roughness Sa of 0.079 nm,and the MRR is 1168 nm·h^(-1).Thickness of damaged layer is merely 0.66 nm confirmed by transmission electron microscopy(TEM).X-ray photoelectron spectroscopy,electron paramagnetic resonance and TEM reveal that·OH radicals form under ultraviolet irradiation on PB/titania catalyst.The·OH radicals oxidize diamond,transforming it from monocrystalline to amorphous atomic structure,generating a soft amorphous layer.This contributes the high MRR and formation of atomic surface on diamond.The developed novel green CMP offers new insights to achieve atomic surface of diamond for potential use in their high-performance devices. 展开更多
关键词 photocatalytic chemical mechanical polishing DIAMOND photocatalytic Fenton reaction material removal rate atomic diamond surface
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Magnetic Field of Atomic Nuclei
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作者 ZHAO Yumin WANG Hengyi YIN Xin 《原子核物理评论》 北大核心 2025年第4期607-609,共3页
In this paper we evaluate typical values of magnetic energy and electromagnetic angular momentum of atomic nuclei with very simple scenarios,for the first time.We point out possible situations in which magnetic energy... In this paper we evaluate typical values of magnetic energy and electromagnetic angular momentum of atomic nuclei with very simple scenarios,for the first time.We point out possible situations in which magnetic energy and angular momentum might play essential roles in nuclear physics. 展开更多
关键词 atomic nucleus magnetic energy electromagnetic angular momentum
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VARIATION OF THE INNER ELECTRONIC CLOUD IN A TWO-ELECTRON ATOMIC SYSTEM
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作者 鲍诚光 《Science China Mathematics》 SCIE 1992年第1期91-99,共9页
The variation of the inner electronic cloud of a two-electron system when the outer elec-tron is moving far away or coming close is investigated in this paper mainly by analyzingthe shape-density. The geometric charac... The variation of the inner electronic cloud of a two-electron system when the outer elec-tron is moving far away or coming close is investigated in this paper mainly by analyzingthe shape-density. The geometric character and features of internal motion of the ~1S^e heliumstates having different K--numbers have been shown, the mechanism for energy transfer andthe details of radial-radial correlation have been inspected. The motion of the inner electroniccloud as a whole is found to be strongly correlated with the motion of the outer electron. 展开更多
关键词 INNER ELECTRON CLOUD two-electron atomic system.
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Rare Earth Oxide Surface Modification of Porous SiO_(2) Film Prepared by Atomic Layer Deposition
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作者 JIN Jianfei LÜLin +3 位作者 LI Ying YAN Lu CAO Yunzhen LI Wei 《无机材料学报》 北大核心 2025年第9期1029-1036,I0003,共9页
Broadband transparent films play a pivotal role in various applications such as lenses and solar cells,particularly porous structured transparent films exhibit significant potential.This study investigates a porous Si... Broadband transparent films play a pivotal role in various applications such as lenses and solar cells,particularly porous structured transparent films exhibit significant potential.This study investigates a porous SiO_(2) refractive index gradient anti-reflective film prepared by atomic layer deposition(ALD).A porous SiO_(2) film with gradual porosity was obtained by phosphoric acid etching of Al_(2)O_(3)/SiO_(2) multilayers with gradient Al2O3 ratios,achieving a gradual decrease in refractive index from the substrate to the surface.The film exhibited an average transmittance as high as 97.8%within the wavelength range from 320 nm to 1200 nm.The environmental adaptability was further enhanced by surface modification using rare earth oxide(REO)La_(2)O_(3),resulting in formation of a lotus leaf-like structure and achieving a water contact angle of 100.0°.These data proved that the modification significantly improved hydrophobic self-cleaning capability while maintaining exceptional transparency of the film.The surface structure of the modified film remained undamaged even after undergoing wipe testing,demonstrating its excellent surface durability. 展开更多
关键词 porous SiO_(2) rare earth oxide atomic layer deposition anti-reflective SELF-CLEANING
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Theoretical Insights into the Atomic and Electronic Structures of Polyperyleneimide:On the Origin of Photocatalytic Oxygen Evolution Activity
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作者 Yi-Qing Wang Zhi Lin +1 位作者 Ming-Tao Li Shao-Hua Shen 《电化学(中英文)》 北大核心 2025年第5期28-36,共9页
Polymeric perylene diimide(PDI)has been evidenced as a good candidate for photocatalytic water oxidation,yet the origin of the photocatalytic oxygen evolution activity remains unclear and needs further exploration.Her... Polymeric perylene diimide(PDI)has been evidenced as a good candidate for photocatalytic water oxidation,yet the origin of the photocatalytic oxygen evolution activity remains unclear and needs further exploration.Herein,with crystal and atomic structures of the self-assembled PDI revealed from the X-ray diffraction pattern,the electronic structure is theoretically illustrated by the first-principles density functional theory calculations,suggesting the suitable band structure and the direct electronic transition for efficient photocatalytic oxygen evolution over PDI.It is confirmed that the carbonyl O atoms on the conjugation structure serve as the active sites for oxygen evolution reaction by the crystal orbital Hamiltonian group analysis.The calculations of reaction free energy changes indicate that the oxygen evolution reaction should follow the reaction pathway of H_(2)O→^(*)OH→^(*)O→^(*)OOH→^(*)O_(2)with an overpotential of 0.81 V.Through an in-depth theoretical computational analysis in the atomic and electronic structures,the origin of photocatalytic oxygen evolution activity for PDI is well illustrated,which would help the rational design and modification of polymeric photocatalysts for efficient oxygen evolution. 展开更多
关键词 Photocatalytic oxygen evolution Polymeric perylene diimide atomic structure Electronic structure Reaction pathway
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Atomic Catalysts Unlocked by Vintage Theory
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《Bulletin of the Chinese Academy of Sciences》 2025年第2期80-80,共1页
Single-atom catalysts(SACs),in which isolated metal atoms such as palladium(Pd)are anchored on solid supports,promise breakthroughs in energy conversion and catalysis.However,balancing their activity(reaction speed)an... Single-atom catalysts(SACs),in which isolated metal atoms such as palladium(Pd)are anchored on solid supports,promise breakthroughs in energy conversion and catalysis.However,balancing their activity(reaction speed)and stability(longevity)remains challenging,as the interplay between metal atoms,supports,and reactants is poorly understood. 展开更多
关键词 single atom catalysts solid supports metal atomssupportsand SACs PALLADIUM energy conversion atomic catalysts metal atoms
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Phase‑gradient metasurface enables atomic spin chirality detection for elliptically polarized laser‑pumped atomic magnetometer
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作者 Jiahao Zhang Shuo Sun +3 位作者 Huanyu Zhou Rongtong Zhu Ruofan Li Jin Li 《PhotoniX》 2025年第1期480-494,共15页
The powerful light field manipulation capability of metasurfaces offers a novel development perspective for the quantum precision measurement.By applying the phasegradient metasurface(PGM)to atomic magnetometers(AMs),... The powerful light field manipulation capability of metasurfaces offers a novel development perspective for the quantum precision measurement.By applying the phasegradient metasurface(PGM)to atomic magnetometers(AMs),we have proposed and experimentally demonstrated a new type of compact single-beam elliptically polarized atomic magnetometers(EPAMs).Employing the fabricated chiral beam splitter PGM with high cross-polarization transmittance,a new atomic spin chirality detection method was devised,enabling the ultra-high sensitivity for extremely weak magnetic field measurement and achieving a high sensitivity of 2.67 pT/Hz^(1/2)under an external magnetic field of approximately 10,000 nT.The new AMs combine the pumping and probing polarized light,achieving a compact design.The fabricated PGM has a size of only 3 mm×3 mm×0.7 mm,which is beneficial for the miniaturization and integration of AMs.This work effectively expands the application of metasurfaces in the field of quantum precision measurement,and also provides a new viewpoint for the design and development of high-sensitivity and miniaturized AMs. 展开更多
关键词 Phase-gradient metasurface atomic magnetometer atomic spin detection Elliptically polarized laser-pumped Quantum sensing Chip-scale
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Researchers Achieve Atomic-Scale Control of Quantum Interference
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《Bulletin of the Chinese Academy of Sciences》 2025年第4期256-256,共1页
A research team led by Prof.YANG Kai at the Institute of Physics(IOP),Chinese Academy of Sciences,in collaboration with Prof.FERNÁNDEZ-ROSSIER Joaquín from International Iberian Nanotechnology Laboratory,has... A research team led by Prof.YANG Kai at the Institute of Physics(IOP),Chinese Academy of Sciences,in collaboration with Prof.FERNÁNDEZ-ROSSIER Joaquín from International Iberian Nanotechnology Laboratory,has demonstrated all-electrical control of quantum interference in individual atomic spins on a surface,opening new possibilities for fast and robust quantum-state manipulation at the atomic scale. 展开更多
关键词 quantum state manipulation atomic scale all electrical control atomic spins quantum interference
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