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Effect of vacancy charge state on positron annihilation in silicon

Chinese Physics B 2013年第10期22卷 394-396页

作者：刘建党成斌孔伟叶邦角 state Key Laboratory of Particle Detection and Electronics University of Science and Technology of China Department of Modern Physics University of Science and Technology of China

The charge-state-dependent lattice relaxation of mono-vacancy in silicon is studied using the first-principles pseu- dopotential plane-wave method. We observe that the structural relaxation for the first-neighbor atoms of the mono-vacancy is strongly dependent on its charge state. The difference in total electron density between with and without charge states in mono-vacancy and its relevant change due to the localized positron are also examined by means of first-principles simu- lation, demonstrating the strong interplay between positron and electron. Our calculations reveal that the positron lifetime decreases with absolute charge value increasing.

关键词： vacancy charge state positron annihilation

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Subdiffraction optical manipulation of the charge state of nitrogen vacancy center in diamond

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Light(Science & Applications) 2015年第1期4卷 554-561页

作者： Xiangdong Chen Changling Zou Zhaojun Gong Chunhua Dong Guangcan Guo Fangwen Sun Key Lab of Quantum Information University of Science and Technology of ChinaHefei 230026China Synergetic Innovation Center of Quantum Information and Quantum Physics University of Science and Technology of ChinaHefei 230026China

As a potential candidate for quantum computation and metrology,the nitrogen vacancy(NV)center in diamond presents both challenges and opportunities resulting from charge-state *** utilizing different lasers for the photon-induced charge-state conversion,we achieved subdiffraction charge-state *** charge-state depletion(CSD)microscopy resolution was improved to 4.1 nm by optimizing the laser pulse ***,the electron spin-state dynamics of adjacent NV centers were selectively detected via the *** experimental results demonstrated that the CSD can improve the spatial resolution of the measurement of NV centers for nanoscale sensing and quantum information.

关键词： charge state NV center photon ionization super-resolution microscopy

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Relationship between the Local Vibration Mode Characteristics and the charge state of Carbon Acceptor in GaAs

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Rare Metals 1992年第3期11卷 207-211页

作者：杨瑞霞李光平王琴何秀坤 Hebei Institute of Technology Tianjin 300130China Tianjin Electronic Materials Research Institute Tianjin 300192China

The local vibration mode(LVM)of carbon acceptor in GaAs is studied by measuring directly the change in LVM absorption with a NIC-170 SX FT-IR *** change in the charge state of carbon acceptor and the temperature dependence of the LVM absorption were investigated *** contents of the impurities other than carbon were estimated by secondary ion mass *** is observed that the frequency,the spectral form and the integrated absorption of the LVM are not affected by the change in charge state of car- bon acceptor.

关键词： Local vibration mode GaAs charge state Carbon acceptor Absorption

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Probing CO on a rutile TiO_(2)(110)surface using atomic force microscopy and Kelvin probe force microscopy

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Nano Research 2022年第3期15卷 1909-1915页

作者： Yuuki Adachi Yasuhiro Sugawara Yan Jun Li Department of Applied Physics Osaka University2-1 YamadaokaSuitaOsaka 565-0871Japan

Probing CO at a specific site on a metal oxide surface is essential for characterizing various applications such as CO oxidation,hydrogenation,and water–gas shift ***,we use atomic force microscopy and Kelvin probe force microscopy to probe the CO on a rutile TiO_(2)(110)*** results indicate that CO can be manipulated along the Ti row by the repulsive lateral force of“pushing”***,the joint combination of precise manipulation and the distance dependence of local contact potential difference allow us to resolve the interatomic dipole moment and charge state of CO at atomic ***,we found that the negatively charged CO with the dipole moment of negative pole down on the rutile TiO_(2)(110)*** results suppose that both the charge state as well as the on-surface dipole interaction are very effective for CO reaction on rutile TiO_(2)(110)surface.

关键词： CO rutile TiO_(2) dipole moment charge state atomic force microscopy Kelvin probe force microscopy

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A Two-Layer Fuzzy Control Strategy for the Participation of Energy Storage Battery Systems in Grid Frequency Regulation

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Energy Engineering 2023年第6期120卷 1445-1464页

作者： Wei Chen Na Sun Zhicheng Ma Wenfei Liu Haiying Dong School of New Energy and Power Engineering Lanzhou Jiaotong UniversityLanzhou730000China Electric Power Research Institute of state Grid Gansu Electric Power Company Lanzhou730070China

To address the frequency fluctuation problem caused by the power dynamic imbalance between the power system and the loadwhen a large number of newenergy sources are connected to the grid,a two-layer fuzzy control strategy is proposed for the participation of the energy storage battery system in ***,considering the coordination of FM units responding to automatic power generation control commands,a comprehensive allocation strategy of two signals under automatic power generation control commands is proposed to give full play to the advantages of two FM signals while enabling better coordination of two FM units responding to FM commands;secondly,based on the grid FM demand and battery FM capability,a double-layer fuzzy control strategy is proposed for FM units responding to automatic power generation control commands in a coordinated manner under dual-signal allocation mode to precisely allocate the power output depth of FM units,which can control the fluctuation of frequency deviation within a smaller range at a faster speed while maintaining the battery charge state;finally,the proposed Finally,the proposed control strategy is simulated and verified inMatlab/*** results show that the proposed control strategy can control the frequency deviation within a smaller range in a shorter time,better stabilize the fluctuation of the battery charge level,and improve the utilization of the FM unit.

关键词： Battery energy storage secondary FM signal distribution mode charge state two-layer fuzzy control

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Mechanism of the Ir/Pd catalyzed photocarboxylation of aryl halides

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Chinese Chemical Letters 2021年第4期32卷 1403-1406页

作者： Ying Lv Bing Wang Haizhu Yu Department of Chemistry and Centre for Atomic Engineering of Advanced Materials Anhui University.Hefei 230601China Department of Chemistry University of Science and Technology of ChinaHefei 230026China

The recent Ir/Pd co-catalyzed photo carboxylation of aromatic halides with CO_(2) has shown high efficiency and excellent functional group tolerance for preparing aromatic carboxylic acids and *** the aid of density functional theory(DFT)calculations,the carboxylation starts with two parallel steps,i.e.,oxidative addition of aromatic halides on Pd~0 and reductive quenching of the photocatalyst Ir(ppy)_(2)(dtbpy)~+with ***,a successive oxidation of Pd~Ⅱwith the amine radical(generated by the reaction of cationic radical amine and Cs_(2) CO_(3)and Ir~Ⅱspecies occurs to generate Pd~0,from which the carboxylation occurs easily via a coordination,Pd-C insertion *** release of the carboxylate product then regenerates the catalyst.

关键词： Carboxylation Pd-catalysis DFT charge state Mechanism

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