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Nano Research 2025年第1期18卷 10-20页

作者： Zongsheng Chen Yahui Wang Yi Liu Zhigang Li Xiangyin Lv Liping Liu Yajing Chang Jiaming Shi Xiao Zhang state Key Laboratory of Pulsed Power Laser Technology School of Electronic EngineeringNational University of Defense TechnologyHefei 230037China Anhui Provincial Laboratory of Advanced Laser Technology School of Electronic EngineeringNational University of Defense TechnologyHefei 230037China Centre for Environmental and Energy Nanomaterials Anhui Key Laboratory of Nanomaterials and NanotechnologyCAS Centre for Excellence in NanoscienceInstitute of Solid State PhysicsHefei Institutes of Physical ScienceChinese Academy of SciencesHefei 230031China

Hierarchical hollow structure has demonstrated potential for enhancing electromagnetic(EM)attenuation and improving impedance matching,garnering significant attention for ***,we have successfully implemented compositional and structural engineering to fabricate hollow Mo2C/C microspheres with controllable composition by coupling interaction between dopamine hydrochloride and ammonium *** the synergistic effect of composition and hollow structure,the strongest reflection loss intensity and broadest effective absorption of the optimized sample reach-70.2 dB and 6.2 GHz,*** formation of hollow heterogeneous structures not only favors impedance matching feature,but also generates considerable contribution to EM attenuation ***,radar cross-section simulation data indicate that hollow Mo2C/C microspheres with compositional optimization and heterogeneous structures have broad prospects for practical applications.

关键词： electromagnetic absorption Mo2C/C microwave absorption hollow structure

Size-Dependent Melting Behaviour of Nanometre-Sized Pb Particles Studied by Dynamic Mechanical Analysis

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Chinese physics Letters 2006年第6期23卷 1548-1550页

作者：陈晓明费广涛崔平 Key Laboratory of Materials physics Institute of Solid State Physics Hefei Institutes of Physical Science Chinese Academy of Sciences PO Box 1129 Hefei 230031

Nanometre-sized （hereafter nano-） Pb particles embedded in an Al matrix are prepared by ball milling. It is found that the size of nano-Pb particles was decreased with increasing milling time. The melting behaviour of nano-Pb particles embedded in the Al matrix is studied by means of dynamic mechanical analysis, and a single internal friction peak in the vicinity of Pb melting temperature is observed. The onset temperature of the peak moves to lower temperature with the decrease of particles size and the internal friction peak height is increased, which indicates a size-dependent melting behaviour of nano-Pb particles. It is suggested that the size-dependent melting behaviour is associated with surface melting.

关键词： INTERNAL-FRICTION AL MATRIX NANOPARTICLES NANOCRYSTALS ALUMINUM SN BI

Tunable structural color of anodic tantalum oxide films

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Chinese physics B 2012年第8期21卷 527-531页

作者：盛翠翠蔡云雨代恩梅梁长浩 Key Laboratory of Materials physics and Anhui Key Laboratory of Nanomaterials and Nanotechnology Institute of Solid State PhysicsHefei Institutes of Physical ScienceChinese Academy of Sciences Information Center Hefei Institutes of Physical ScienceChinese Academy of Sciences

Tantalum （Ta） oxide flhns with tunable structural color were fabricated easily using anodic oxidation. The structure, components, and surface valence states of the oxide films were investigated by using gazing incidence X-ray diffractometry, X-ray photoelectron microscopy, and surface analytical techniques. Their thickness and optical properties were studied by using spectroscopic ellipsometry and total reflectance spectrum. Color was accurately defined using L＊a＊b＊ scale. The thickness of compact Ta2O5 films was linearly dependent on anodizing voltage. The film color was tunable by adjusting the anodic voltage. The difference in color appearance resulted from the interference behavior between the interfaces of air-oxide and oxide metal.

关键词： anodic tantalum oxide structural color spectroscopic ellipsometry optical interference

Facile Synthesis of 3D Porous Flower-like ZnO Micro/nanostructure Films and Their Photocatalytic Performance

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Chinese Journal of Chemical physics 2012年第3期25卷 339-344,374页

作者： Jin-ling Yang Guang Tao Fei Hui Li Hao-miao Ouyang Key Laboratory of Materials physics and Anhui Key Laboratory of Nanomaterials and Nanotechnology Institute of Solid State Physics Hefei Institutes of Physical Science Chinese Academy of SciencesHefei 230031 China

3D porous flower-like ZnO micro/nanostructure films grown on Ti substrates are synthesized via a very facile electrodeposition technique followed by heat treatment process. The ZnO architecture is assembled with ultra thin sheets, which consist of numbers of nanoparticles and pores, and the size of the nanoparticles can be controlled by adjusting the electrodepo- sition time or calcination temperature. It is worth noting that this synthetic method can provide an effective route for other porous metal oxide nanostructure films. Moreover, the photocatalytic performance shows the porous ZnO is an ideal photocatalyst.

关键词： Zinc oxide porous film Photocatalyst Micro/nanostructure Electrodeposition

Highly efficient and stable perovskite solar cells with strong hydrophobic barrier via introducing poly(vinylidene fluoride)additive

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Journal of Energy Chemistry 2021年第6期30卷 593-600,I0014页

作者： Haiying Zheng Guozhen Liu Weiwei Wu Huifen Xu Xu Pan institutes of physical science and Information Technology Anhui UniversityHefei 230601AnhuiChina Key Laboratory of Photovoltaic and Energy Conservation Materials Institute of Solid State PhysicsHefei Institutes of Physical ScienceChinese Academy of SciencesHefei 230031AnhuiChina

Perovskite solar cells(PSCs)have become the promising next-generation photovoltaic devices due to their excellent photoelectric performances,and the power conversion efficiencies(PCEs)have experienced unprecedented rapid increase in recent ***,to realize the practical application of PSCs,high performance and long-term stability are required and the preparation of high-quality perovskite film is the ***,we adopt a simple and effective method to prepare high-quality perovskite films by introducing the poly(vinylidene fluoride)(PVDF)polymer additive with abundant hydrophobic *** the growth template,the PVDF promotes the growth of perovskite crystal,improves the crystallinity and film morphology,thus reducing defect density and inhibiting carrier *** results show that the photovoltaic performances of the perovskite device with PVDF are meaningfully improved,and a high PCE of 21.42%is achieved with an improvement of 10.87%,More importantly,the PVDF-based perovskites display greatly enhanced humidity and heat stability due to the protection of strong hydrophobic barrier from F and PVDF long *** at 45%±5%relative humidity(RH)for 2400 h and 850 C for300 h,respectively,the unsealed PVDF devices can maintain over 90%of the initial *** indicates that suitable polymer additives can improve the film quality to acquire high-performance and stable PSCs and lay a foundation to design new perovskite light absorption layer with different polymers for the further development of PSCs.

关键词： Perovskite solar cells Poly(vinylidene fluoride) Polymer additive Hydrophobic barrier Long-term stability

physical Origin of Color Changes in Lutetium Hydride under Pressure

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Chinese physics Letters 2023年第11期40卷 120-125页

作者：吕润涂文倩邵定夫孙玉平鲁文建 Key Laboratory of Materials physics Institute of Solid State PhysicsHefei Institutes of Physical ScienceChinese Academy of SciencesHefei 230031China science Island Branch of Graduate School University of Science and Technology of ChinaHefei 230026China High Magnetic Field Laboratory Institute of Solid State PhysicsHefei Institutes of Physical ScienceChinese Academy of SciencesHefei 230031China Collaborative Innovation Center of Microstructures Nanjing UniversityNanjing 210093China

Recently,near-ambient superconductivity was claimed in nitrogen-doped lutetium hydride(LuH_(3-δ)N_(ε)).Unfortunately,all follow-up research still cannot find superconductivity signs in successfully synthesized lutetium dihydride(LuH_(2)) and N-doped LuH_(2±x)N_(y).However,a similar intriguing observation was the pressure-induced color changes(from blue to pink and subsequent red).The physical understanding of its origin and the correlation between the color,crystal structure,and chemical composition of Lu–H–N is still *** this work,we systematically investigated the optical properties of LuH_(2) and LuH_(3),and the effects of hydrogen vacancies and nitrogen doping using the first-principles calculations by considering both interband and intraband *** results demonstrate that the evolution of reflectivity peaks near blue and red light,which is driven by changes in the band gap and Fermi velocity of free electrons,resulting in the blue-to-red color change under *** contrast,LuH_(3) exhibits gray and no color change up to 50 ***,we investigated the effects of hydrogen vacancies and nitrogen doping on its optical *** vacancies can significantly decrease the pressure of blue-to-red color change in LuH_(2) but do not have a noticeable effect on the color of LuH_(3).The N-doped LuH_(2) with the substitution of a hydrogen atom at the tetrahedral position maintains the color change when the N-doping concentration is *** the doping level increases,this trend becomes less obvious,while other N-doped structures do not show a blue-to-red color *** results can clarify the origin of the experimental observed blue-to-red color change in lutetium hydride and also provide a further understanding of the potential N-doped lutetium dihydride.

关键词： hydride doping Origin

Microstructural evolution and thermal fatigue damage mechanism of second-phase dispersion strengthened tungsten composites under repetitive thermal loads

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Journal of Materials science & Technology 2023年第9期140卷 221-232页

作者： Hui Wang Zhuoming Xie Xiang Cheng Ke Jing Linchao Zhang Junfeng Yang Rui Liu Le Han Lei Cao Xianping Wang Qianfeng Fang Changsong Liu Xuebang Wu Key Laboratory of Materials physics Institute of Solid State PhysicsHFIPSChinese Academy of SciencesHefei 230031China University of science and Technology of China Hefei 230026China institute of Plasma physics Hefei Institutes of Physical ScienceChinese Academy of SciencesHefei 230031China

In a fusion reactor,plasma-facing tungsten(W)materials inevitably suffer severe thermal shock,and the performance of W materials under repetitive high heat loads is one of the key concerns for long-term stable operation of the *** this work,the microstructural evolution and thermal fatigue resistance of two representative W-0.5 wt.%ZrC(WZC)and W-1.0 wt.% Y_(2)O_(3)(WYO)composites were investigated under cyclic heat *** to the intrinsic properties of ZrC and Y_(2)O_(3)particles such as coefficients of thermal expansion,particle size and distributions in W grains,the WZC composite exhibited a better thermal shock resistance than *** thermal loads with the absorbed power density(APD)≥22 MW/m^(2),WYO showed obvious grain growth,Y_(2)O_(3)particles shedding and degradation of mechanical ***,in the case of WZC,these damage behaviors only occurred when APD≥25 MW/m^(2).Furthermore,an interesting crack mechanism in W composites was revealed due to interface debonding and progressive shedding of second-phase particles from the W *** microstructures and tensile properties of the thermally loaded WZC and WYO specimens were also investigated and the correlations between the microstructure evolution and performance degradation are *** results are useful for evaluating the thermal fatigue resistance of oxide/carbide dispersion strengthened W composites and their application in future fusion reactors.

关键词： Tungsten Thermal loads Microstructure Particle shedding Mechanical properties

Magneto-Orientated Graphite Double-Layer Homo-Structure with Broadband Microwave Absorption

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Chinese physics Letters 2023年第11期40卷 149-154页

作者：王俊松丁伟张成宏邱康高佑琳陈棉科 Muhammad Adnan Aslam Mahmoud AKhalifa 罗家亮方军盛志高 High Magnetic Field Laboratory Hefei Institutes of Physical ScienceChinese Academy of SciencesHefei 230031China University of science and Technology of China Hefei 230026China institutes of physical science and Information Technology Anhui UniversityHefei 230601China institute of solid state physics Chinese Academy of SciencesHefei 230031China

We utilized magnetic fields as an efficient tool to manipulate the orientation and electromagnetic properties of graphite micro-flakes(GMFs).As a result,we successfully developed a GMF double-layer homo-structure,which shows excellent electromagnetic absorption *** tuning the direction of a small magnetic field(850 G),vertical and horizontal aligned GMFs are *** electromagnetic parameters are effectively tailored by this magneto-orientation effect,and the vertical and horizontal aligned GMFs achieve good results in terms of impedance matching and microwave *** the combination of these two magneto-orientated layers,vertically oriented as the surficial impedance matching layer and horizontally oriented as the inner loss layer,we design a GMF-based double-layer *** thickness optimization,-38.2 d B minimum reflection loss and 6.4 GHz(11.6–18.0 GHz)absorption bandwidth are *** findings further emphasize the importance of material orientation freedom and provide a magneto-strategy to design multiple-layer structures and to produce high-performance microwave devices.

关键词： microwave matching absorption

Single thiolate replacement of metal nanoclusters

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science China Chemistry 2024年第2期67卷 523-528页

作者： Ambreen Ambreen Yue Zhou Wanmiao Gu Qing You Liang Fang Guoqing Bian Nan Yan Nan Xia Zhikun Wu Key Laboratory of Materials physics Anhui Key Laboratory of Nanomaterials and NanotechnologyInstitute of Solid State PhysicsHefei Institutes of Physical Science(HFIPS)Chinese Academy of SciencesHefei230031China University of science and Technology of China Hefei230601China institute of physical science and Information Technology Anhui UniversityHefei230601China

Surface thiolates play important roles in evincing the structures and properties of thiolated metal nanoclusters—one type of recently emerging inorganic-organic hybrids,and thus the thiolate substitution,especially single thiolate substitution,is highly desirable for subtly tailoring the structures and properties of metal ***,such a single-thiolate substituting is challenging,and its influence on the metal-metal and metal-sulfur bonds remains mysterious due to the absence of the singlethiolate-substituted ***,we developed a combined method,concurrently synthesized the single-thiolate-substituted nanocluster and its parent nanocluster,and successfully resolved their structures by single crystal X-ray crystallography,which reveals that the single thiolate substitute has an obvious influence on the metal-metal and metal-sulfur bond lengths although it has no effect on the absorption ***,the metal-metal and metal-sulfur bonds show various thermal extensibility and even the negative thermal expansion phenomena of the Au–S bond were observed in the single-thiolate-substituted *** bond length-related stability was also ***,this study highlights a novel synthesis method and offers novel structural insights and an in-depth structure-property correlation of thiolated metal nanoclusters.

关键词： metal nanoclusters single thiolate replacement thermal expansion stability intercluster interaction

'Ship-in-a-Bottle' Approach to Synthesize Ag@hm-SiO2 Yolk/Shell Nanospheres

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Chinese Journal of Chemical physics 2015年第5期28卷 -页

作者： Wei-qiang Li Guo-zhong Wang Guang-hai Li Yun-xia Zhang Key Laboratory of Materials physics Centre for Environmental and Energy Nanomaterials and Anhui Key Laboratory of Nanomaterials and Nanotechnology Institute of Solid State Physics Hefei Institutes of Physical Science Chinese Academy of Sciences Hefei 230031 China Key Laboratory of Materials physics Centre for Environmental and Energy Nanomaterials and Anhui Key Laboratory of Nanomaterials and Nanotechnology Institute of Solid State Physics Hefei Institutes of Physical Science Chinese Academy of Sciences Hefei 230031 ChinaSchool of Chemistry and Materials Science University of Science and Technology of China Hefei 230026 China

An effective protocol is presented for the synthesis of Ag@hm-SiO2 yolk/shell nanostructures (YSNs) via a facile “ship-in-a-bottle” method. TEM observations show that the as-obtained Ag@hm-SiO2 YSNs have a single silver core in the interior of hollow mesoporous silica (hm-SiO2) nanospheres, in which the thickness of hm-SiO2 outer shell is about 14 nm and the silver core has an average size of about 43 nm. And the content of silver in Ag@hm-SiO2 YSNs is about 10.29% based on the inductively coupled plasma measurement. The as-synthesized Ag@hm-SiO2 YSNs exhibited significantly enhanced catalytic performance compared with the pure Ag nanoparticles toward the reduction of 4-nitrophenol to 4-aminophenol in the presence of NaBH4.

关键词： Ag@hm-SiO2 Yolk/shell Ship-in-a-bottle Nanoreactor