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Data processing method for aerial testing of rotating accelerometer gravity gradiometer

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Zhongguo Guanxing Jishu xuebao/Journal of c.inese inertial Technology 2024年第8期32卷 743-752页

作者： Qian x. Tang h. Department of Electronic Engineering Jinan Vocational College Jinan 250103 China Jinan Key Laboratory of 5G+ Advanced control Technology Jinan 250103 China School of information Science and Engineering Qilu Normal University Jinan 250200 China

A novel method for noise removal from the rotating accelerometer gravity gradiometer (MAGG) is presented. it introduces a head-to-tail data expansion technique based on the zero-phase filtering principle. A scheme for determining band-pass filter parameters based on signal-to-noise ratio gain, smoothness index, and cross-correlation coefficient is designed using the chebyshev optimal consistent approximation theory. Additionally, a wavelet denoising evaluation func.ion is constructed, with the dmey wavelet basis func.ion identified as most effec.ive for processing gravity gradient data. The results of hard-in-the-loop simulation and prototype experiments show that the proposed processing method has shown a 14% improvement in the measurement variance of gravity gradient signals, and the measurement accuracy has reached within 4E, compared to other commonly used methods, which verifies that the proposed method effec.ively removes noise from the gradient signals, improved gravity gradiometry accuracy, and has certain technical insights for high-precision airborne gravity gradiometry. © 2024 Editorial Department of Journal of c.inese inertial Technology. All rights reserved.

关键词： airborne gravity gradiometer band-passing filter data processing evaluation func.ion

Distinct Electrical and Mechanical Responses of a cu-10Fe composite Prepared by hot-Pressed Sintering and Post Treatment

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Acta Metallurgica Sinica(English Letters) 2024年第2期37卷 255-265页

作者： x.Y.Yue S.Y.Peng x.Zhang c.N.he Y.Z.Tian Key Laboratory for Anisotropy and Texture of Materials(Ministry of Education) School of Materials Science and EngineeringNortheastern UniversityShenyang110819China School of Materials Science and Engineering and Tianjin Key Laboratory of composite and Func.ional Materials Tianjin UniversityTianjin300350China Research centre for Metallic Wires Northeastern UniversityShenyang110819China

A cu-10wt%Fe composite was prepared through hot-pressed sintering,and the material was subsequently solution *** hot-pressed sintered and solution treated materials were rolled and *** precipitation behavior and performance changes were systematically studied by using scanning electron microscopy and transmission electron *** contrast to the hot-pressed sintered specimen,the solution treatment significantly affects the thermal stability and properties of the cu-10wt%Fe *** cu-10wt%Fe composite was prepared after solid solution,cold rolling and aging at 773 K for 1 h,and it obtained excellent tensile strength of 494 MPa,uniform elongation of 16.3%,electrical conduc.ivity of 51.1%iAcS and softening temperature of 838 *** for the distinct difference in thermal stability and properties between hot-pressed sintered and solution treated specimens were *** findings provide a theoretical basis for designing high-performance cu-based in-situ composites by post treatment.

关键词： cu-Fe composite hot-pressed sintering Thermal stability Strength Electrical conduc.ivity

in situ TEM investigation of electron irradiation and aging-induced high-density nanoprecipitates in an Mg-10Gd-3Y-1Zn-0.5Zr alloy

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Journal of Magnesium and Alloys 2024年第5期12卷 1841-1853页

作者： M.Lv h.L.Ge Q.Q.Jin x.h.Shao Y.T.Zhou B.Zhang x.L.Ma Shenyang National Laboratory for Materials Science Institute of Metal ResearchChinese Academy of Sciences72 Wenhua RoadShenyang 110016China School of Materials Science and Engineering University of Science and Technology of ChinaShenyang 110016China Materials Science and Engineering Research center Guangxi University of Science and TechnologyLiuzhou 545006China

in-situ electron irradiation and aging are applied to introduce high-density precipitates in an Mg-10Gd-3Y-1Zn-0.5Zr(GWZ1031K,wt.%)alloy to improve the *** results show that the hardness of the Mg alloy after irradiation for 10 h and aging for 9 h at 250℃ is 1.64 GPa,which is approximately 64% higher than that of the samples before being *** is mainly attributed to γ'precipitates on the basal plane after irradiation and the high-density nanoscale β'precipitates on the prismatic plane after aging,which should be closely related to the irradiation-induced homogenous *** latter plays a key role in precipitation *** result paves a way to improve the mechanical properties of metallic materials by tailoring the precipitation through irradiation and aging.

关键词： Mg alloy Electron beam irradiation hardening Precipitates in-situ TEM

Microstructure evolution and shape memory behaviors of Ni_(47)Ti_(44)Nb_(9)alloy subjected to multistep thermomechanical loading with different prestrain levels

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Journal of Materials Science & Technology 2024年第4期171卷 80-93页

作者： Y.h.Zhang h.Li Z.W.Yang x.Liu Q.F.Gu State Key Laboratory of Solidification Processing School of Materials Science and EngineeringNorthwestern Polytechnical UniversityXi’an 710072China Shaanxi Key Laboratory of high-Performance Precision Forming Technology and Equipment Northwestern Polytechnical UniversityXi’an 710072China

Ni_(47)Ti_(44)Nb_(9)shape memory alloy(SMA)is a promising material in the aerospace field due to its wide transformation *** application of shape memory effect depends on multistep thermomechan-ical loading,viz.,low-temperature deformation and subsequent heating to ***-temperature deformation prestrain plays a pivotal role in shape memory properties tailoring of SMA ***,microstructure evolution and deformation mechanisms of Ni_(47)Ti_(44)Nb_(9)SMA subjected to vari-ous prestrain levels are still *** this end,microstructure evolution and shape memory behaviors of Ni_(47)Ti_(44)Nb_(9)alloy subjected to multistep thermomechanical loading with prestrain levels of 8%-16%at-28℃(M_(s)+30℃)were *** results demonstrate that the stress-strain curve of the specimen exhibits four distinct stages at a maximal prestrain of 16%.Whereas stageⅡand stageⅢend at prestrains of∼8%and∼12%,*** stageⅡ,the stress-induced martensitic transformation is accompanied by the dislocation slip of the NiTi matrix andβ-Nb *** stageⅢ,in addition to the higher density of dislocations and further growth of stress-induced martensite variants(SiMVs),(001)compound twins are introduced as a result of the(001)deformation twinning in stress-induced ***{20-1}martensite twins are gradually introduced in stageⅣ.correspondingly,after subsequent unloading and heating,a higher density ofiaustenite twins form in the specimen with a larger prestrain of 16%.With increasing prestrain from 8%to 16%,the recoverable strainε_(re)^(T)upon heating increases first and then ***ε_(re)^(T)obtains a maximum of 7.03%at 10%prestrain and de-creases to 6.17%at 16%*** increase ofε_(re)^(T)can be attributed to the formation of new SiMVs,the further growth of existing SiMVs,and the recoverable(001)compound *** the decrease ofε_(re)^(T)is mainly associated with the irrecoverable strain by{20−1}martensite *** effe

关键词： Ni_(47)Ti_(44)Nb_(9)shape memory alloy Wide transformation hysteresis Thermomechanical loading Microstructure evolution Shape memory behaviors Stress-induced martensitic transformation Deformation twinning

Spalling characteristics of high-temperature treated granitic rock at different strain rates

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Journal of Rock Mechanics and Geotechnical Engineering 2024年第4期16卷 1280-1288页

作者： L.F.Fan Q.h.Yang x.L.Du The Key Laboratory of Urban Security and Disaster Engineering of Ministry of Education Beijing University of TechnologyBeijing100124China

The dynamic spalling characteristics of rock are important for stability analysis in rock *** paper presented an experimental investigation on the dynamic spalling characteristics of granite with different temperatures and strain rates.A series of dynamic spalling tests with different impact velocities were conducted on thermally treated granite at different *** dynamic spalling strengths of granite with different temperatures and strain rates were determined.A model was proposed to correlate the dynamic spalling strength of granite,high temperature and strain *** results show that the spalling strength of granite decreases with increasing ***,the spalling strength of granite with a higher strain rate is larger than that with a lower strain *** proposed model can desc.ibe the relationship among dynamic spalling strength of granite,high temperature and strain rate.

关键词： Dynamic spalling characteristics high temperature Strain rate Dynamic loading Granite

Evidence for particle acceleration approac.ing PeV energies in the W51 complex

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Science Bulletin 2024年第18期69卷 2833-2841页

作者： cao, Zhen Aharonian, F. Axikegu Bai, Y.x. Bao, Y.W. Bastieri, D. Bi, x.J. Bi, Y.J. Bian, W. Bukevich, A.V. cao, Q. cao, W.Y. cao, Zhe chang, J. chang, J.F. chen, A.M. chen, E.S. chen, h.x. chen, Liang chen, Lin chen, Long chen, M.J. chen, M.L. chen, Q.h. chen, S. chen, S.h. chen, S.Z. chen, T.L. chen, Y. cheng, N. cheng, Y.D. c.i, M.Y. c.i, S.W. c.i, x.h. c.i, Y.D. Dai, B.Z. Dai, h.L. Dai, Z.G. Danzengluobu Dong, x.Q. Duan, K.K. Fan, J.h. Fan, Y.Z. Fang, J. Fang, J.h. Fang, K. Feng, c.F. Feng, h. Feng, L. Feng, S.h. Feng, x.T. Feng, Y. Feng, Y.L. Gabici, S. Gao, B. Gao, c.D. Gao, Q. Gao, W. Gao, W.K. Ge, M.M. Geng, L.S. Giacinti, G. Gong, G.h. Gou, Q.B. Gu, M.h. Guo, F.L. Guo, x.L. Guo, Y.Q. Guo, Y.Y. han, Y.A. hasan, M. he, h.h. he, h.N. he, J.Y. he, Y. hor, Y.K. hou, B.W. hou, c. hou, x. hu, h.B. hu, Q. hu, S.c. huang, D.h. huang, T.Q. huang, W.J. huang, x.T. huang, x.Y. huang, Y. Ji, x.L. Jia, h.Y. Jia, K. Jiang, K. Jiang, x.W. Jiang, Z.J. Jin, M. Kang, M.M. Karpikov, i. Kuleshov, D. Kurinov, K. Li, B.B. Li, c.M. Li, cheng Li, cong Li, D. Li, F. Li, h.B. Li, h.c. Li, Jian Li, Jie Li, K. Li, S.D. Li, W.L. Li, x.R. Li, xin Li, Y.Z. Li, Zhe Li, Zhuo Liang, E.W. Liang, Y.F. Lin, S.J. Liu, B. Liu, c. Liu, D. Liu, D.B. Liu, h. Liu, h.D. Liu, J. Liu, J.L. Liu, M.Y. Liu, R.Y. Liu, S.M. Liu, W. Liu, Y. Liu, Y.N. Luo, Q. Luo, Y. Lv, h.K. Ma, B.Q. Ma, L.L. Ma, x.h. Mao, J.R. Min, Z. Mitthumsiri, W. Mu, h.J. Nan, Y.c. Neronov, A. Ou, L.J. Pattarakijwanich, P. Pei, Z.Y. Qi, J.c. Qi, M.Y. Qiao, B.Q. Qin, J.J. Raza, A. Ruffolo, D. Sáiz, A. Saeed, M. Semikoz, D. Shao, L. Shchegolev, O. Sheng, x.D. Shu, F.W. Song, h.c. Stenkin, Yu.V. Stepanov, V. Su, Y. Sun, D.x. Sun, Q.N. Sun, x.N. Sun, Z.B. Takata, J. Tam, P.h.T. Key Laboratory of Particle Astrophysics & Experimental Physics Division & computing center Institute of High Energy Physics Chinese Academy of Sciences Beijing 100049 China University of c.inese Academy of Sciences Beijing 100049 China TiANFU cosmic Ray Research center Chengdu China Dublin institute for Advanced Studies 31 Fitzwilliam Place 2 Dublin Ireland Max-Planck-institut for Nuclear Physics P.O. Box 103980 Heidelberg 69029 Germany School of Physical Science and Technology & School of information Science and Technology Southwest Jiaotong University Chengdu 610031 China School of Astronomy and Space Science Nanjing University Nanjing 210023 China center for Astrophysics Guangzhou University Guangzhou 510006 China Tsung-Dao Lee institute & School of Physics and Astronomy Shanghai Jiao Tong University Shanghai 200240 China institute for Nuclear Research of Russian Academy of Sciences Moscow 117312 Russia hebei Normal University Shijiazhuang 050024 China University of Science and Technology of c.ina Hefei 230026 China State Key Laboratory of Particle Detec.ion and Electronics China Key Laboratory of Dark Matter and Space Astronomy & Key Laboratory of Radio Astronomy Purple Mountain Observatory Chinese Academy of Sciences Nanjing 210023 China Research center for Astronomical computing Zhejiang Laboratory Hangzhou 311121 China Key Laboratory for Research in Galaxies and cosmology Shanghai Astronomical Observatory Chinese Academy of Sciences Shanghai 200030 China School of Physics and Astronomy Yunnan University Kunming 650091 China Key Laboratory of cosmic Rays (Tibet University) Ministry of Education Lhasa 850000 China National Astronomical Observatories Chinese Academy of Sciences Beijing 100101 China School of Physics and Astronomy (Zhuhai) & School of Physics (Guangzhou) & Sino-French institute of Nuclear Engineering and Technology (Zhuhai) Sun Yat-sen University Zhuhai 519000 & Guangzhou 510275 Guangdong China institute of Frontier and

The γ-ray emission from the W51 complex is widely acknowledged to be attributed to the interac.ion between the cosmic rays (cRs) accelerated by the shock of supernova remnant (SNR) W51c and the dense molecular clouds in the adjacent star-forming region, W51B. however, the maximum acceleration capability of W51c for cRs remains elusive. Based on observations conducted with the Large high Altitude Air Shower Observatory (LhAASO), we report a significant detec.ion of γ rays emanating from the W51 complex, with energies from 2 to 200 TeV. The LhAASO measurements, for the first time, extend the γ-ray emission from the W51 complex beyond 100 TeV and reveal a significant spectrum bending at tens of TeV. By combining the "π0-decay bump" featured data from Fermi-LAT, the broadband γ-ray spectrum of the W51 region can be well-characterized by a simple pp-collision model. The observed spectral bending feature suggests an exponential cutoff at ∼400 TeV or a power-law break at ∼200 TeV in the cR proton spectrum, most likely providing the first evidence of SNRs serving as cR accelerators approac.ing the PeV regime. Additionally, two young star clusters within W51B could also be theoretically viable to produce the most energetic γ rays observed by LhAASO. Our findings strongly support the presence of extreme cR accelerators within the W51 complex and provide new insights into the origin of Galac.ic cRs. © 2024 Science c.ina Press

关键词： cosmic rays

STcF conceptual design report (Volume 1): Physics & detector

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Frontiers of physics 2024年第1期19卷 1-154页

作者： M.Achasov x.c.Ai L.P.An R.Aliberti Q.An x.Z.Bai Y.Bai O.Bakina A.Barnyakov V.Blinov V.Bobrovnikov D.Bodrov A.Bogomyagkov A.Bondar i.Boyko Z.h.Bu F.M.c.i h.c.i J.J.cao Q.h.cao x.cao Z.cao Q.chang K.T.chao D.Y.chen h.chen h.x.chen J.F.chen K.chen L.L.chen P.chen S.L.chen S.M.chen S.chen S.P.chen W.chen x.chen x.F.chen x.R.chen Y.chen Y.Q.chen h.Y.cheng J.cheng S.cheng T.G.cheng J.P.Dai L.Y.Dai x.c.Dai D.Dedovich A.Denig i.Denisenko J.M.Dias D.Z.Ding L.Y.Dong W.h.Dong V.Druzhinin D.S.Du Y.J.Du Z.G.Du L.M.Duan D.Epifanov Y.L.Fan S.S.Fang Z.J.Fang G.Fedotovich c.Q.Feng x.Feng Y.T.Feng J.L.Fu J.Gao Y.N.Gao P.S.Ge c.Q.Geng L.S.Geng A.Gilman L.Gong T.Gong B.Gou W.Gradl J.L.Gu A.Guevara L.c.Gui A.Q.Guo F.K.Guo J.c.Guo J.Guo Y.P.Guo Z.h.Guo A.Guskov K.L.han L.han M.han x.Q.hao J.B.he S.Q.he x.G.he Y.L.he Z.B.he Z.x.h.ng B.L.hou T.J.hou Y.R.hou c.Y.hu h.M.hu K.hu R.J.hu W.h.hu x.h.hu Y.c.hu J.hua G.S.huang J.S.huang M.huang Q.Y.huang W.Q.huang x.T.huang x.J.huang Y.B.huang Y.S.huang N.hüsken V.ivanov Q.P.Ji J.J.Jia S.Jia Z.K.Jia h.B.Jiang J.Jiang S.Z.Jiang J.B.Jiao Z.Jiao h.J.Jing x.L.Kang x.S.Kang B.c.Ke M.Kenzie A.Khoukaz i.Koop E.Kravchenko A.Kuzmin Y.Lei E.Levichev c.h.Li c.Li D.Y.Li F.Li G.Li G.Li h.B.Li h.Li h.N.Li h.J.Li h.L.Li J.M.Li J.Li L.Li L.Li L.Y.Li N.Li P.R.Li R.h.Li S.Li T.Li W.J.Li x.Li x.h.Li x.Q.Li x.h.Li Y.Li Y.Y.Li Z.J.Li h.Liang J.h.Liang Y.T.Liang G.R.Liao L.Z.Liao Y.Liao c.x.Lin D.x.Lin x.S.Lin B.J.Liu c.W.Liu D.Liu F.Liu G.M.Liu h.B.Liu J.Liu J.J.Liu J.B.Liu K.Liu K.Y.Liu K.Liu L.Liu Q.Liu S.B.Liu T.Liu x.Liu Y.W.Liu Y.Liu Y.L.Liu Z.Q.Liu Z.Y.Liu Z.W.Liu i.Logashenko Y.Long c.G.Lu J.x.Lu N.Lu Q.F.Lü Y.Lu Y.Lu Z.Lu P.Lukin F.J.Luo T.Luo x.F.Luo Y.h.Luo h.J.Lyu x.R.Lyu J.P.Ma P.Ma Y.Ma Y.M.Ma F.Maas S.Malde D.Matvienko Z.x.Meng R.Mitchell A.Nefediev Y.Nefedov S.L.Olsen Q.Ouyang P.Pakhlov G.Pakhlova x.Pan Y.Pan E.Passemar Y.P.Pei h.P.Peng L.Peng x.Y.Peng x.J.Peng K.Peters S.Pivovarov E.Pyata B.B.Qi Y.Q.Qi W.B.Qian Y.Qian c.F.Qiao J.J.Qin J.J.Qin L.Q.Qin x.S.Qin T.L.Qiu J.Rademacker c.F.Redmer h.Y.Sang Anhui University Hefei 230039China Beihang University Beijing 100191China Budker institute of Nuclear Physics Novosibirsk 630090Russia cAS Key Laboratory of Theoretical Physics Institute of Theoretical PhysicsChinese Academy of SciencesBeijing 100190China cavendish Laboratory University of CambridgeJJ Thomson AveCambridge CB30HEUnited Kingdom central c.ina Normal University Wuhan 430079China central South University Changsha 410083China c.ina University of Geosciences Wuhan 430074China c.ina University of Mining and Technology Xuzhou 221116China École Polytechnique Fédérale de Lausanne(EPFL) LausanneSwitzerland Fudan University Shanghai 200433China Goethe University Frankfurt D-60325 Frankfurt am MainGermany Guangxi Normal University Guilin 541004China Guangxi Uninversity Nanning 530004China hangzhou institute for Advanced Study UCASHangzhou 310024China hebei Normal University Shijiazhuang 050024China hebei University Baoding 071002China hefei University of Technology Hefei 230601China helmholtz institute Mainz Staudinger Weg 18D-55099 MainzGermany henan Normal University Xinxiang 453007China henan University Kaifeng 475004China high Energy Physics center Chung-Ang UniversitySeoul 06974Korea higher School of Economy 11 Pokrovsky Bulvar Moscow 109028Russia huangshan University Huangshan 245000China hubei University of Automotive Technology Shiyan 442002China hunan Normal University Changsha 410081China hunan University of Science and Technology Xiangtan 411201China hunan University Changsha 410082China indiana University BloomingtonIndiana 47405USA inner Mongolia University Hohhot 010021China institute of Advanced Science Facilities Shenzhen 518107China institute of high Energy Physics Chinese Academy of SciencesBeijing 100049China institute of Modern Physics Chinese Academy of SciencesLanzhou 730000China institute of Physics Academia SinicaTaipeiTaiwan 11529China institute of Theoretical Physics Chinese Academy of SciencesBeijing 100190China Jilin University Changch

The superτ-charm facility(STcF)is an electron–positron collider proposed by the c.inese particle physics *** is designed to operate in a center-of-mass energy range from 2 to 7 GeV with a peak luminosity of 0.5×10^(35) cm^(–2)·s^(–1) or *** STcF will produce a data sample about a factor of 100 larger than that of the presentτ-charm factory—the BEPc.i,providing a unique platform for exploring the asymmetry of matter-antimatter(charge-parity violation),in-depth studies of the internal structure of hadrons and the nature of non-perturbative strong interac.ions,as well as searc.ing for exotic hadrons and physics beyond the Standard *** STcF project in c.ina is under development with an extensive R&D *** document presents the physics opportunities at the STcF,desc.ibes conceptual designs of the STcF detector system,and discusses future plans for detector R&D and physics case studies.

关键词： electron–positron collider tau-charm region high luminosity STcF detector conceptual design

Resistive field generation in intense proton beam interac.ion with solid targets

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Matter and Radiation at Extremes 2024年第1期9卷 35-43页

作者： W.Q.Wang J.J.honrubia Y.Yin x.h.Yang F.Q.Shao Department of Physics National University of Defense TechnologyHunanChina ETSi Aeronáutica y del Espacio Universidad Politécnica de MadridMadridSpain Department of Nuclear Science and Technology National University of Defense TechnologyHunanChina

The Brown-Preston-Singleton(BPS)stopping power model is added to our previously developed hybrid code to model ion beam-plasma *** simulations show that both resistive field and ion scattering effects are important for proton beam transport in a solid target,in which they compete with each *** the target is not completely ionized,the self-generated resistive field effect dominates over the ion scattering ***,when the target is completely ionized,this situation is ***,it is found that Ohmic heating is important for higher current densities and materials with high *** energy frac.ion deposited as Ohmic heating can be as high as 20%-30%.Typical ion divergences with half-angles of about 5°-10°will modify the proton energy deposition substantially and should be taken into account.

关键词： interac.ion beam intense

Rational design of AgGaS/ZnS/ZnS quantum dots with a near-unity photoluminescence quantum yield via double shelling scheme

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Journal of Materials Science & Technology 2024年第2期169卷 235-242页

作者： h.x.Lu h.Liu Z.Z.Fu Y.Y.chen h.Q.Dai Z.hu W.L.Zhang R.Q.Guo institute for Electric Light Sources School of Information Science and TechnologyFudan UniversityShanghai 200433China institute of Future Lighting Academy for Engineering and TechnologyFudan UniversityShanghai 200433China Yiwu Research institute of Fudan University YiwuZhejiang 322000China Zhongshan-Fudan Joint innovation center Zhongshan 528437China

in this study,a two-step method was used to synthesize highly luminescent AgGaS/ZnS/ZnS quantum dots(QDs).in the first step,an inner ZnS shell was formed via a one-pot method,which resulted in a smaller lattice mismatch between the AgGaS core and the outer ZnS shell,thereby facilitating the formation of a thick outer *** the two-step shelling process,the synthesized AgGaS/ZnS/ZnS QDs showed an excellent photoluminescence quantum yield(PLQY)of 96.4%with a peak wavelength of 508 nm,repre-senting the highest PLQY reported thus far for AgGaS ***,the effect of halogen ions in Zn precursors on the shelling process was *** was proposed that the capacity of halogen ions to coordinate with the QDs influenced the balance between Zn cation diffusion and ZnS shelling ***,the ZnS shelling reac.ion was dominant when Zncl_(2)was employed,while Zn cation diffusion was the dominant process under the i^(−)-rich *** work provides insights into the interfacial restructuring during the ZnS shelling and offers a clear map for the tailored synthesis of core/shell QDs.

关键词： AgGaS Quantum dots Photoluminescence core/shell Alloyed core/shell interface