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Development of series SQUID array with on-chip filter for TES detector

Chinese Physics B 2022年第2期31卷 665-670页

作者： Wentao Wu Zhirong Lin Zhi Ni Peizhan Li Tiantian Liang Guofeng Zhang Yongliang Wang Liliang Ying Wei Peng Wen Zhang Shengcai Shi Lixing You Zhen Wang State Key Laboratory of Functional Materials for Informatics Shanghai Institute of Microsystem and Information Technology(SIMIT)Chinese Academy of Sciences(CAS)Shanghai 200050China CAS Center for Excellence in Superconducting Electronics(CENSE) Shanghai 200050China University of Chinese Academy of Sciences Beijing 100049China Purple Mountain Observatory Chinese Academy of SciencesNanjing 210023China University of Science and Technology of China Hefei 230026China

A cold preamplifier based on superconducting quantum interference devices(SQUIDs)is currently the preferred readout technology for the low-noise transition edge sensor(TES).In this work,we have designed and fabricated a series SQUID array(SSA)amplifier for the TES detector readout *** this SSA amplifier,each SQUID cell is composed of a first-order gradiometer formed using two equally large square washers,and an on-chip low pass filter(LPF)as a radiofrequency(RF)choke has been developed to reduce the Josephson oscillation interference between individual SQUID *** addition,a highly symmetric layout has been designed carefully to provide a fully consistent embedded electromagnetic environment and achieve coherent flux *** measured results show smooth V-Φcharacteristics and a swing voltage that increases linearly with increasing SQUID cell number N.A white flux noise level as low as 0.28μφ;/Hz;is achieved at 0.1 K,corresponding to a low current noise level of 7 pA/Hz;.We analyze the measured noise contribution at mK-scale temperatures and find that the dominant noise derives from a combination of the SSA intrinsic noise and the equivalent current noise of the room temperature electronics.

关键词： SSA amplifier TES detectors on-chip low pass filter(LPF) noise contribution

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Engineering the axial coordination of cobalt single atom catalysts for efficient photocatalytic hydrogen evolution

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Nano Research 2024年第6期17卷 5114-5121页

作者： Ning Kang Lingwen Liao Xue Zhang Zhen He Binlu Yu Jiahong Wang Yongquan Qu Paul KChu Seeram Ramakrishna Xue-Feng Yu Xin Wang Licheng Bai Materials Interfaces Center Shenzhen Institute of Advanced TechnologyChinese Academy of Sciences(CAS)Shenzhen 518055China Key Laboratory of Materials Physics Anhui Key Laboratory of Nanomaterials and NanotechnologyCAS Center for Excellence in NanoscienceInstitute of Solid State PhysicsChinese Academy of SciencesHefei 230031China Department of Chemistry City University of Hong KongKowloonHong Kong 999077China Hong Kong Branch of National Precious Metals Material Engineering Research Center(NPMM) City University of Hong KongKowloonHong Kong 999077China Key Laboratory of Special Functional and Smart Polymer Materials of Ministry of Industry and Information Technology School of Chemistry and Chemical EngineeringNorthwestern Polytechnical UniversityXi’an 710072China Department of Physics and Department of Materials Science and Engineering City University of Hong KongKowloonHong Kong 999077China National University of Singapore(NUS)Centre for Nanofibers and Nanotechnology Department of Mechanical EngineeringNational University of SingaporeSingapore 117542Singapore

Improving the catalytic activity of non-noble metal single atom catalysts(SACs)has attracted considerable attention in materials *** optimizing the local electronic structure of single atom can greatly improve their catalytic activity,it often involves in-plane modulation and requires high ***,we report a novel strategy to manipulate the local electronic structure of SACs via the modulation of axial Co-S bond anchored onto graphitic carbon nitride(C_(3)N_(4))at room temperature(RT).Each Co atom is bonded to four N atoms and one S atom(Co-(N,S)/C_(3)N_(4)).Owing to the greater electronegativity of S in the Co-S bond,the local electronic structure of the Co atoms is available to be controlled at a relatively moderate ***,when employed for the photocatalytic hydrogen evolution reaction,the adsorption energy of intermediate hydrogen(H*)on the Co atoms is remarkably *** the presence of the Co-(N,S)/C_(3)N_(4)SACs,the hydrogen evolution rates reach up to 10 mmol/(g·h),which is nearly 10 and 2.5 times greater than the rates in the presence of previously reported transition metal/C_(3)N_(4)and noble platinum nanoparticles(PtNPs)/C_(3)N_(4)catalysts,*** to the tailorable axial Co-S bond in the SAC,the local electronic structure of the Co atoms can be further optimized for other photocatalytic *** axial coordination engineering strategy is universal in catalyst designing and can be used for a variety of photocatalytic applications.

关键词： transition metal single-atom local electronic structure photocatalytic hydrogen evolution graphitic carbon nitride axial coordination environment

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Efficient heterogeneous integration of InP/Si and GaSb/Si templates with ultra-smooth surfaces

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Science China(Information Sciences) 2022年第8期65卷 238-246页

作者： Tingting JIN Jiajie LIN Tiangui YOU Xiaolei ZHANG Hao LIANG Yifan ZHU Jialiang SUN Hangning SHI Chaodan CHI Min ZHOU Robert KUDRAWIEC Shumin WANG Xin OU State Key Laboratory of Functional Materials for Informatics Shanghai Institute of Microsystem and Information TechnologyChinese Academy of Sciences Center of Materials Science and Optoelectronics Engineering University of Chinese Academy of Sciences College of Information Science and Engineering Jiaxing University School of Information Science and Technology Shanghai Tech University Department of Semiconductor Materials Engineering Wroclaw University of Science and Technology Department of Microtechnology and Nanoscience Chalmers University of Technology

Heterogeneous integration of InP and GaS b on Si substrates holds a huge potential interest in near-infrared and mid-infrared optoelectronic devices. In this study, 2-inch 180-nm-thick InP and 185-nmthick GaS b thin layers were successfully transferred onto the Si substrates to form high-quality and ultrasmooth InP/Si and GaS b/Si templates using molecular beam epitaxy(MBE) and the ion-slicing technique together with selective chemical etching. The relocation of the implantation-introduced damage in the sacrificial layer enables the transfer of relatively defect-free InP and GaS b thin films. The sacrificial layers were completely etched off by selective chemical etching, leaving ultra-smooth epitaxial surfaces with a roughness of 0.2 nm for the InP/Si template and 0.9 nm for the GaS b/Si template, respectively. Thus, the chemical mechanical polishing(CMP) process was not required to smooth the surface which usually introduces particles and chemical contaminations on the transferred templates. Furthermore, the donor substrate is not consumed and can be recycled to reduce the cost, which provides a paradigm for the sustainable and economic development of the Si integration platform.

关键词： heterogeneous integration InP/Si GaSb/Si MBE ion-slicing technique selective chemical etching

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A passive temperature regulator

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National Science Open 2024年第6期3卷 12-25页

作者： Jinlei Li Tengyao Jiang Yan Song Yi Jiang Peiru Shi Ning Xu Zhenhui Lin Bin Zhu Gang Tan Jia Zhu National Laboratory of Solid State Microstructures College of Engineering and Applied SciencesJiangsu Key Laboratory of Artificial Functional MaterialsFrontiers Science Center for Critical Earth Material CyclingCollaborative Innovation Center of Advanced MicrostructuresNanjing UniversityNanjing 210093China School of Environmental Science and Engineering Nanjing Tech UniversityNanjing 211816China College of Civil Engineering and Architecture Zhejiang UniversityHangzhou 310058China School of Sustainable Energy and Resources Nanjing UniversitySuzhou 215163China

Maintaining stable temperatures is crucial for civilization,but it typically requires substantial energy consumption,contributing to significant carbon *** advancements in passive heating/cooling technologies,achieving purely passive temperature regulation in volatile environments remains a challenge due to the temporal mismatch between heating/cooling demand and passive power ***,we demonstrate a passive temperature regulator that balances the power demand and supply through a tailored sandwich structure,integrating the functionalities of harvesting,storage,and release of passive solar heat and space *** experiments demonstrate that the regulator maintains a target temperature for 96%(71%)of the testing period in winter(summer).Compared to conventional solar absorbers(radiative coolers),the regulator saves 56%(30%)of energy across 31 cities worldwide in achieving stable *** regulator represents an important advancement in passive temperature regulation with minimized carbon footprint and shows attractive prospects both on Earth and in outer space.

关键词： energy-saving technology passive temperature stabilization solar thermal conversion radiative cooling

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Bubble-templated Construction of Three-dimensional Ceramic Network for Enhanced Thermal Conductivity of Silicone Rubber Composites

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Chinese Journal of Polymer Science 2021年第7期39卷 789-795页

作者： Shou-Jun Li Jing-Chao Li Pei-ZhiJi Wen-Feng Zhang Yong-Lai Lu Li-Qun Zhang State Key Laboratory of Organic-Inorganic Composites Beijing University of Chemical TechnologyBeijing 100029China Beijing Key Laboratory of Wood Science and Engineering&MOE Key Laboratory of Wooden Material Science and Application Beijing Forestry UniversityBeijing W0083China Key Laboratory of Carbon Fiber and Functional Polymers Ministry of EducationBeijing University of Chemical TechnologyBeijing 100029China Engineering Research Center of Elastomer Materials Energy Conservation and Resources Ministry of EducationBeijing University of Chemical TechnologyBeijing 100029China

With the continuous development of the electronics industry,the energy density of modern electronic devices increases constantly,thus releasing a lot of heat during *** electronic devices take higher and higher request to the thermal interface *** high thermal conductivity needs to establish an interconnecting thermal conductivity network in the *** this purpose,the suspension of Al203 and curdlan was first foamed to construct a bubble-templated continuous ceramic *** to the rapid gelation property of curdlan,we can easily remove moisture by hot air ***,the high thermally conductive composites are prepared by vacuum impregnation of silicone *** result showed that composites prepared by our method have higher thermal conductivity than the samples obtained by traditional *** thermal conductivity of the prepared composite material reached 1.253 W·m^(-1)·K·^-(1)when the alumina content was 69.6 wt%.This facile method is expected to be applied to the preparation of high-performance thermal interface materials.

关键词： Thermally conductive network Alumina Curdlan Thermal conductivity

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Recent Developments in APXPS at the Shanghai Synchrotron Radiation Facility

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Synchrotron Radiation News 2022年第3期35卷 26-30页

作者： Zhang, Hui Li, Xiaobao Yu, Yi Liu, Zhi State Key Laboratory of Functional Materials for Informatics Shanghai Institute of Microsystem and Information Technology Chinese Academy of Sciences Shanghai China Center for Transformative Science ShanghaiTech University Shanghai China School of Physical Science and Technology ShanghaiTech University Shanghai China

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Vesicle-Shaped Co-Ni-S Designed by First Principles Screening and D-Band Center Control for Active Hydrogen Evolution

SSRN

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SSRN 2024年

作者： Zheng, Youbin Li, Ze Guo, Hao Liu, Cunyin Chen, Yuefeng Han, Xiumei Dong, Liang Zang, Jianbing Key Laboratory of Dielectric and Electrolyte Functional Material Hebei Province School of Resources and Materials Northeastern University at Qinhuangdao Qinhuangdao066004 China State Key Laboratory of Metastable Materials Science and Technology College of Materials Science and Engineering Yanshan University Qinhuangdao066004 China

Hydrogen evolution reaction (HER) is considered as an effective pathway for hydrogen production. Herein, to obtain efficient HER catalyst, density functional theory is employed to figure out the optimal candidate for nickel sulfide. Guided by the mechanistic screening, the highly active HER electrocatalyst, Co-substituted Ni3S4, is synthesized by one-step hydrothermal method, resembling a vesicle composed of a broken spherical membrane and encapsulated clusters of nanospheres. Cracks on membrane provide a rational entry for reactant molecules to be enclosed in the vesicle. Additionally, the enhanced intrinsic activity also attributes to the upward shift of the d-band center. From the reaction energy diagrams, the decomposition of H2O* is confirmed as the rate-determining step (RDS) and the energy required for the RDS is efficiently lowered by the elevated d-band center, which made the catalyst achieves 185 mV overpotential at 100 mA·cm-2 and 38 mV at 20 mA·cm-2, lower than utmost Co-Ni-S relative electrocatalyst. © 2024, The Authors. All rights reserved.

关键词： Hydrothermal synthesis

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Preparation of Ag-Doped Srtio3 by Gel-Assisted Solid state Method: Microstructure Evolution and Photocatalytic Performance

SSRN

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SSRN 2023年

作者： Xie, Changxiang Ma, Yuan Guo, Zishuang Wang, Haiwang Zhao, Yihao Wu, Songyang Wang, Bingzhu Key Laboratory of Dielectric and Electrolyte Functional Material Hebei Province Northeastern University at Qinhuangdao Qinhuangdao066004 China State Key Laboratory of Structural Analysis for Industrial Equipment Dalian University of Technology Dalian116024 China

In order to improve the photocatalytic hydrogen production rate of SrTiO3, Ag ions doped SrTiO3 was prepared in this work using Gel-assisted Solid state Method. The effect of Ag ions doping on the micro-structure of SrTiO3 was investigated and the nucleation-growth mechanism of Ag/SrTiO3 was revealed. Finally, the effect of Ag ions doping on the photocatalytic hydrogen production was systematically analyzed. The photocatalytic hydrogen production rate was 48.62 μmol/g/h at 1 % Ag ions doping, which was 20.26 times of that of pure SrTiO3. This work provided a low-temperature green preparation technology of high-efficiency Ag/SrTiO3 photocatalytic materials. © 2023, The Authors. All rights reserved.

关键词： Crystal structure

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A 3D/0D cobalt-embedded nitrogen-doped porous carbon/supramolecular porphyrin magnetic-separation photocatalyst with highly efficient pollutant degradation and water oxidation performance

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Journal of materials Science & Technology 2022年第29期124卷 53-64页

作者： Lufang Ning Jing Xu Yang Lou Chengsi Pan Zhouping Wang Yongfa Zhu State Key Laboratory of Food Science and Technology Jiangnan UniversityWuxi 214122China School of Food Science and Technology Jiangnan UniversityWuxi 214122China International Joint Laboratory on Food Safety Jiangnan UniversityWuxi 214122China Collaborative Innovation Center of Food Safety and Quality Control in Jiangsu Province Jiangnan UniversityWuxi 214122China Key Laboratory of Synthetic and Biological Colloids Ministry of EducationSchool of Chemical and Material EngineeringJiangnan UniversityWuxi 214122China National Engineering Research Center for Functional Food Jiangnan UniversityWuxi 214122China Key Laboratory of Meat Processing of Sichuan Chengdu UniversityChengdu 610106China Department of Chemistry Tsinghua UniversityBeijing 100084China

A 3D/0D cobalt-embedded nitrogen-doped porous carbon nanocubes(Co-N-C)/supramolecular tetra(4-carboxylphenyl)porphyrin nanocrystals(SA-TCPP)photocatalyst was successfully self-assembled viaπ–πinteraction,hydrogen bonding,and chemical ***-N-C/SA-TCPP heterostructure exhibited satisfactory visible photocatalytic oxidation performance on pollutant degradation and water *** degradation rates of Co-N-C/ST(30%)composite towards 2,4-dichlorophenol,ofloxacin,and ethylene were10.9,7.2,and 2.1 times faster than SA-TCPP,*** oxygen evolution efficiency was 1.9 times higher than *** remarkably improved oxidation activities of Co-N-C/SA-TCPP were mainly ascribed to the following reasons:(1)Co-N-C could enhance the light absorption ability of SA-TCPP to produce more photoinduced carriers.(2)The well-developed porosity of Co-N-C could optimize the dispersibility of SA-TCPP to provide more reactive sites and charge separation channels.(3)Theπ–πinteraction between SA-TCPP and Co-N-C was beneficial to interlayer charge mobility,while the embedded cobalt nanoparticles(Co NPs)and N-doped carbon matrix could serve as electron traps to accelerate interfacial electron ***,the ferromagnetic Co NPs endowed Co-N-C/SA-TCPP with magnetic-separation function to promote recyclability in practical application.

关键词： Visible-light photocatalysis Supramolecular porphyrin ZIF-67 derived co-catalyst 3D/0D heterostructure Magnetic-separation

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高温亲水性键合结合离子束剥离技术制备晶圆级β-Ga_(2)O_(3)/SiC异质集成材料

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Science China materials 2023年第2期66卷 756-763页

作者：沈正皓徐文慧陈阳林家杰谢玉环黄凯游天桂韩根全欧欣 State Key Laboratory of Functional Materials for Informatics Shanghai Institute of Microsystem and Information TechnologyChinese Academy of SciencesShanghai 200050China Center of Materials Science and Optoelectronics Engineering University of Chinese Academy of SciencesBeijing 100049China College of Information Science and Engineering Jiaxing UniversityJiaxing 314001China The State Key Discipline Laboratory of Wide Band Gap Semiconductor Technology School of MicroelectronicsXidian UniversityXi’an 710071China

将β-Ga_(2)O_(3)与高导热SiC衬底异质集成可以有效解决氧化镓高功率电子器件的散热问题.本文通过高温亲水性键合结合离子束剥离技术,将2英寸的高质量(201)β-Ga_(2)O_(3)单晶薄膜转移到了4H-SiC衬底上.为理解离子束剥离β-Ga_(2)O_(3)... 详细信息

将β-Ga_(2)O_(3)与高导热SiC衬底异质集成可以有效解决氧化镓高功率电子器件的散热问题.本文通过高温亲水性键合结合离子束剥离技术,将2英寸的高质量(201)β-Ga_(2)O_(3)单晶薄膜转移到了4H-SiC衬底上.为理解离子束剥离β-Ga_(2)O_(3)薄膜的物理机制,我们系统地研究了注氢β-Ga_(2)O_(3)表面起泡的演变过程及该过程中气泡内部的压力变化.采用有限元模拟预测合适的键合温度,通过将β-Ga_(2)O_(3)和4H-SiC晶圆在96℃的温度下进行高温亲水性键合,有效降低了离子束剥离过程中异质界面上的热应力,防止β-Ga_(2)O_(3)/4H-SiC键合对的解键合以实现薄膜的转移.X射线衍射结果表明,转移的β-Ga_(2)O_(3)薄膜具有窄的衍射峰半高宽,为79.2 arcsec.对薄膜进行化学机械抛光后,获得了极光滑的表面,均方根粗糙度仅0.1 nm.采用高温亲水性键合结合离子束剥离技术制备的β-Ga_(2)O_(3)/4H-SiC异质集成材料将成为开发高性能β-Ga_(2)O_(3)功率器件提供实用平台.

关键词：剥离技术功率电子器件化学机械抛光异质集成均方根粗糙度晶圆级氧化镓功率器件

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