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Adenosine triphosphate-responsive carbon dots nanoreactors for T_(1)-weighted magnetic resonance imaging-guided tumor chemodynamic therapy

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science China Materials 2024年第11期67卷 3742-3752页

作者： Fuchun Nan Xiaokuang Xue Jian Li Ke Liang Jian Wang William WYu Jiechao Ge Pengfei Wang School of Chemistry and Chemical Engineering Ministry of Education Key Laboratory of Special Functional Aggregated MaterialsShandong Key Laboratory of Advanced Organosilicon Materials and TechnologiesShandong UniversityJinan 250100China Shandong Provincial Key Laboratory for Science of Material Creation and Energy Conversion Science Center for Material Creation and Energy ConversionShandong UniversityQingdao 266237China Key Laboratory of Photochemical Conversion and Optoelectronic Materials and CityU-CAS Joint Laboratory of Functional Materials and Devices Technical Institute of Physics and ChemistryChinese Academy of SciencesBeijing 100190China School of Future Technology University of Chinese Academy of SciencesBeijing 100049China

There are various strategies to conduct tumor microenvironment(TME)stimulus-responsive(e.g.,acid,H_(2)O_(2)or glutathione)nanoreactors for increasing the efficiency of chemodynamic therapy(CDT).Among these,the exploitation of adenosine triphosphate(ATP,another overexpressed biomarker in TME)-responsive nanoreactors for tumor CDT is still ***,the ATP-responsive iron-doped CDs(FeCDs)were firstly prepared and then coassembled with glucose oxidase(GOx)to obtain FeCDs/GOx liposomes as ATP-responsive *** TME conditions,the nanoreactors initially released FeCDs and ***,with the existence of ATP,iron ions were rapidly released from the FeCDs to trigger Fenton/Fenton-like reactions for generating·***,the T_(1)-weighted magnetic resonance imaging(MRI)was achieved due to the released iron ***,the GOx converted endogenous glucose in tumor to gluconic acid and H_(2)O_(2)to satisfy the requirement of·OH *** vitro as well as in vivo experiments illustrated that the obtained ATP-responsive CD nanoreactors could be used as a versatile nanotheranostics for simultaneously T_(1)-weighted MRI-guided tumor *** work presents a new ATP-responsive nanoreactor with selfsupplied H_(2)O_(2)for multifunctional nanotheranostic applications.

关键词： carbon dots adenosine triphosphate self-supplied H_(2)O_(2) glucose oxidase chemodynamic therapy

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Solvents adjusted pure phase CoCO_(3) as anodes for high cycle stability

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Journal of advanced Ceramics 2021年第3期10卷 509-519页

作者： Liming LIU Xiaoxiao HUANG Zengyan WEI Xiaoming DUAN Bo ZHONG Long XIA Tao ZHANG Huatao WANG Dechang JIA Yu ZHOU Rui ZHANG Department of Materials Science School of Material Science and EngineeringHarbin Institute of TechnologyHarbin 150001China Key Laboratory of Advanced Structural Functional Integration Materials&Green Manufacturing Technology Harbin Institute of TechnologyHarbin 150001China School of Materials Science and Engineering Harbin Institute of Technology at WeihaiWeihai 264009China College of Materials Science and Engineering Hunan UniversityChangsha 410082China

CoCO_(3) with high theoretical capacity has been considered as a candidate anode for the next generation of lithium-ion batteries(LIBs).However,the electrochemical performance of CoCO_(3) itself,especially the cyclic stability at high current density,hinders its ***,pure phase CoCO_(3) particles with different particle and pore sizes were prepared by adjusting the solvents(diethylene glycol,ethylene glycol,and deionized water).Among them,CoCO_(3) synthesized with diethylene glycol(DG-CC)as the solvent shows the best electrochemical performance owing to the smaller particle size and abundant mesoporous structure to maintain robust structural stability.A high specific capacity of 690.7 mAh/g after 1000 cycles was achieved,and an excellent capacity retention was *** capacity was contributed by diverse electrochemical reactions and the impedance of DG-CC under different cycles was further *** results provide an important reference for the structural design and stable cycle performance of pure CoCO_(3).

关键词： lithium ion battery(LIB) cobalt carbonate solvothermal method morphological control solvent pure phase

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Effect of GNPs on microstructures and mechanical properties of GNPs/Al-Cu composites with different heat treatment status

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Journal of Materials science & technology 2021年第33期92卷 1-10页

作者： Tielong Han Fucheng Wang Jiajun Li Chunnian He Naiqin Zhao School of Materials Science and Engineering and Tianjin Key Laboratory of Composites and Functional Materials Tianjin UniversityTianjin 300072China Faculty of Materials and Manufacturing Key Laboratory of Advanced Functional MaterialsMinistry of Education of ChinaBeijing University of TechnologyBeijing 100124China Joint School of National University of Singapore and Tianjin University International Campus of Tianjin UniversityFuzhou 350207China Collaborative Innovation Center of Chemical Science and Engineering Tianjin 300072China Key Laboratory of Advanced Ceramics and Machining Technology Ministry of EducationTianjin UniversityTianjin 300072China

Microstructural and mechanical behavior of heat treatable Al-4.6Cu binary alloy reinforced with graphene nanoplates(GNPs) in different heat treatment status were investigated in this *** addition of GNPs significantly enhanced the yield strength and tensile strength of Al-Cu alloy regardless of the heattreatment *** was also found that GNPs accelerated the formation of precipitates,leading to a greatly shortened aging time for GNPs/Al-4.6Cu composite to reach the peak ***,aging treatment enhanced the strength of GNPs/Al-Cu composite very little,which could be explained by the interaction between GNPs,precipitates and *** work inspires us that the heat treatment process of aluminum alloy matrix composites should be designed independently with the matrix in quest of an optimum performance.

关键词： Metal matrix composites Al-Cu alloy Graphene nanoplates Heat treatment

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Scaling MoS2 transistors to 1 nm node

Scaling MoS2 transistors to 1 nm node

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2024 IEEE International Electron Devices Meeting, IEDM 2024

作者： Li, Weisheng Du, Mingyi Zhao, Chunsong Xiong, Guangkai Gan, Weizhuo Liu, Lei Li, Taotao Gao, Yuan Hou, Fuchen Lin, Junhao Fan, Dongxu Qiu, Hao Yu, Zhihao Xu, Jeffrey Shi, Yi Wang, Xinran School of Integrated Circuits Nanjing University China School of Electronic Science and Engineering Nanjing University China Nanjing University China Suzhou Laboratory Suzhou China Huawei Technologies Co. LTD. Shenzhen China Department of Physics Shenzhen Key Laboratory of Advanced Quantum Functional Materials and Devices Southern University of Science and Technology Shenzhen China Shenzhen China School of Integrated Circuit Science and Engineering Nanjing University of Posts and Telecommunications Nanjing China

ISBN: (纸本)9798350365429

We report on the first monolayer MoS2 FETs scaled to 40 nm contacted gate pitch (CGP), corresponding to 1 nm node as defined by IRDS. The FETs deliver drive current of 0.79 mA/µm under 0.6 V drain bias with on/off ratio >107 and SS = 62 mV/dec. We achieve this by developing a new Sb deposition technology which reduces Rc to below 100 Ω.μm at deep Lc scaling regime (Lc = 20 nm). TCAD simulations predict that quad-stacked MoS2 nanosheet FET employing the new Sb contact reduces the gate delay by 46.6% compared to Si CMOS at 1 nm node and demonstrates superior scaling potential to the end of roadmap. © 2024 IEEE.

关键词： Nanosheets

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s±-Wave Pairing and the Destructive Role of Apical-Oxygen Deficiencies in La3Ni2O7 under Pressure

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Physical Review Letters 2023年第23期131卷 236002-236002页

作者： Yu-Bo Liu Jia-Wei Mei Fei Ye Wei-Qiang Chen Fan Yang School of Physics Beijing Institute of Technology Beijing 100081 China Department of Physics Southern University of Science and Technology Shenzhen 518055 China Shenzhen Key Laboratory of Advanced Quantum Functional Materials and Devices Southern University of Science and Technology Shenzhen 518055 China

Recently, the bilayer perovskite nickelate La3Ni2O7 has been reported to show evidence of high-temperature superconductivity (SC) under a moderate pressure of about 14 GPa. To investigate the superconducting mechanism, pairing symmetry, and the role of apical-oxygen deficiencies in this material, we perform a random-phase approximation based study on a bilayer model consisting of the dx2−y2 and d3z2−r2 orbitals of Ni atoms in both the pristine crystal and the crystal with apical-oxygen deficiencies. Our analysis reveals an s±-wave pairing symmetry driven by spin fluctuations. The crucial role of pressure lies in that it induces the emergence of the γ pocket, which is involved in the strongest Fermi-surface nesting. We further found the emergence of local moments in the vicinity of apical-oxygen deficiencies, which significantly suppresses the Tc. Therefore, it is possible to significantly enhance the Tc by eliminating oxygen deficiencies during the synthesis of the samples.

关键词： Multiband superconductivity Pairing mechanisms Superconducting order parameter Superconductivity Superconductors

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Ultra-compact on-chip camera based on optoelectronic compound eyes with nonuniform ommatidia

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International Journal of Extreme Manufacturing 2025年第1期7卷 543-553页

作者： Lin Zhu Yu-Qing Liu Jia-Yi Wan Zhi-Juan Sun Dong-Dong Han Qi-Dai Chen Yong-Lai Zhang State Key Laboratory of Integrated Optoelectronics College of Electronic Science and EngineeringJilin UniversityChangchunPeople’s Republic of China Zhejiang Laboratory HangzhouPeople’s Republic of China Center for Advanced Optoelectronic Functional Materials Research and Key Laboratory for UV Emitting Materials and Technology of Ministry of EducationNational Demonstration Center for Experimental Physics EducationNortheast Normal UniversityChangchunPeople’s Republic of China

Compound eyes(CEs)that feature ultra-compact structures and extraordinary versatility have revealed great potential for cutting-edge ***,the optoelectronic integration of CEs with available photodetectors is still challenging because the planar charge-coupled device(CCD)/complementary metal oxide semiconductor(CMOS)detector cannot match the spatially distributed images formed by CE *** reach this end,we report here the optoelectronic integration of CEs by manufacturing 3D nonuniform ommatidia for developing an ultra-compact on-chip *** a proof-of-concept,we fabricated microscale CEs with uniform and nonuniform ommatidia through femtosecond laser two-photon photopolymerization,and compared their focusing/imaging performance both theoretically and *** engineering the surface profiles of the ommatidia at different positions of the CE,the images formed by all the ommatidia can be tuned on a *** this way,the nonuniform CE can be directly integrated with a commercial CMOS photodetector,forming an ultra-compact CE ***,we further combine the CE camera with a microfluidic chip,which can further serve as an on-chip microscopic monitoring *** anticipate that such an ultra-compact CE camera may find broad applications in microfluidics,robotics,and micro-optics.

关键词： artificial compound eyes two-photon photopolymerization optical electronic integration

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Engineering Defect-Rich Anorthite Via Co2 Weathering Decalcification for Enhanced Fluoride Removal

SSRN

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SSRN 2024年

作者： Liu, Wanchen Liu, Peng Yang, Yunfei Wu, Junshu Wang, Jinshu Xu, Meng Zhou, Wenyuan Li, Yongli Li, Hongyi Key Laboratory of Advanced Functional Materials Ministry of Education College of Materials Science & Engineering Beijing University of Technology Beijing100022 China Faculty of Materials and Manufacturing

Surface hydroxyl group exchange has been identified as a primary factor in the fluoride adsorption process. However, the construction of surface oxygen defects for producing more surface hydroxyl -OH has been involved in high-temperature procedures or strong corrosive effect, thus necessitating the development of effective methods for the practical applications. In this work, anorthite(CaAl2Si2O8, abbr. An) with abundant surface oxygen vacancies (Ov) is facilely synthesized through CO2 weathering decalcification chemistry. The resultant calcium-deficient anorthite (de-Ca An) adsorbent shows better adsorption performance towards fluoride in the solution phase. Typically, the removal efficiency reaches 99.5% (60 mg de-Ca An) after adsorption equilibrium with the fluoride concentration of 20 mg/L (60 mL, pH = 3), and the saturated adsorption capacity is 82.5 mg/g. More Ov appearing on de-Ca An increases surface -OH content and thus promotes adsorption performance, which is verified by first-principles calculations and abundant spectrum analyses. In addition, the effects of pH, surface potential, fluoride concentration, and co-existing anions are also discussed extensively to understand how to prefer adsorption conditions for optimum defluoridation performance. The judicious chemical composition and defect engineering co-promote the efficient fluoride removal of the de-Ca An adsorbent, thus exhibiting significant potential for cleaning fluoride-containing water. © 2024, The Authors. All rights reserved.

关键词： Adsorption

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空间选择性缺陷管理制备高性能碳基CsPbI_(3)钙钛矿太阳能电池

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science Bulletin 2024年第8期69卷 1050-1060页

作者：王海亮张啟先林则东刘慧丛魏晓震宋永发律春宇李卫平朱立群王科翔崔振华王兰林常青殷鹏刚宋廷鲁白阳陈棋杨世和陈海宁 School of Materials Science and Engineering Beihang UniversityBeijing 100191China Guangdong Provincial Key Lab of Nano-Micro Materials Research School of Advanced MaterialsShenzhen Graduate SchoolPeking UniversityShenzhen 518055China Institute of Biomedical Engineering Shenzhen Bay LaboratoryShenzhen 518107China School of Chemistry Beihang UniversityBeijing 100191China Beijing Key Laboratory of Construction Tailorable Advanced Functional Materials and Green Applications MIIT Key Laboratory for Low-Dimensional Quantum Structure and DevicesExperimental Center of Advanced MaterialsSchool of Materials Science&EngineeringBeijing Institute of TechnologyBeijing 100081China School of Internet of Things Engineering Jiangnan UniversityWuxi 214122China School of Physical Science and Technology Guangxi UniversityNanning 530004China Experimental Center of Advanced Materials School of Materials Science&EngineeringBeijing Institute of TechnologyBeijing 100081China

Defects formed at the surface,buried interface and grain boundaries(GB)of CsPbI_(3)perovskite films considerably limit photovoltaic *** defects could be passivated effectively by the most prevalent post modification strategy without compromising the photoelectric properties of perovskite films,but it is still a great challenge to make this strategy comprehensive to different defects spatially distributed throughout the ***,a spatially selective defect management(SSDM)strategy is developed to roundly passivate various defects at different locations within the perovskite film by a facile one-step treatment procedure using a piperazine-1,4-diium tetrafluoroborate(PZD(BF_(4))_(2))*** small-size PZD^(2+)cations could penetrate into the film interior and even make it all the way to the buried interface of CsPbI_(3)perovskite films,while the BF_(4)^(-)anions,with largely different properties from I^(-)anions,mainly anchor on the film ***,virtually all the defects at the surface,buried interface and grain boundaries of CsPbI_(3)perovskite films are effectively healed,leading to significantly improved film quality,enhanced phase stability,optimized energy level alignment and promoted carrier *** these films,the fabricated CsPbI_(3)PSCs based on carbon electrode(C-PSCs)achieve an efficiency of18.27%,which is among the highest-reported values for inorganic C-PSCs,and stability of 500 h at 85℃with 65%efficiency maintenance.

关键词： CsPbI_(3) Defects Spatially selective defect management Carbon electrode

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Entropy-Driven Preordering Assists Nucleation in Polyethylene

arXiv

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arXiv 2024年

作者： Cao, Renkuan Peng, Fan Zhang, Yunhan Sun, Hao Liu, Ziwei Xu, Tingyu Li, Liangbin National Synchrotron Radiation Laboratory Anhui Provincial Engineering Laboratory of Advanced Functional Polymer Film CAS Key Laboratory of Soft Matter Chemistry University of Science and Technology of China Hefei230026 China

Non-classical two-step nucleation including preordering and crystal nucleation has been widely proposed to challenge the one-step nucleation framework in diverse materials, while what drives preordering has not been explicitly resolved yet. With molecular dynamics simulation, we find that two-step nucleation occurs in polyethylene, during which preordering precedes through the coupling between intrachain conformation and interchain orientation orders. Unexpectedly, preordering is driven by entropy rather than enthalpy, during which the interchain translational entropy gain compensates for the intrachain conformation entropy loss. This entropy-driven mechanism resolves the longstanding puzzle why flexible polymers with high entropy penalty still show high nucleation rate and opens a new perspective for understanding nucleation of synthetic and bio-polymers with conformation and orientation orders. Copyright © 2024, The Authors. All rights reserved.

关键词： Conformations

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The Comprehensive Understanding of Intrinsic Contribution of Nickel Foam as a Conductive Substrate in Water Splitting

SSRN

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SSRN 2024年

作者： Rashid, Umair Zhu, Youqi Cao, Chuanbao Research Center of Materials Science Beijing Key Laboratory of Construction Tailorable Advanced Functional Materials and Green Applications Beijing Institute of Technology Beijing100081 China

Using nickel foam as a substrate for electrocatalyst to report overpotential in a manuscript is a popular method in electrochemical testing or water-splitting i.e., the oxygen evolution reaction (OER) and the hydrogen evolution reaction (HER). However, use of coated Nickel foam as substrate methodology is, in essence, not reasonable for studying the intrinsic chemistry difference of electrocatalysts. To assess water-splitting devices, Ni-foam is a valid substrate if nanoparticles are grown uniformly;however, when drop-casted ink methodology is used or there is inhomogeneous growth of nanoparticles, it becomes difficult to determine whether a particular electrocatalyst is intrinsically active or not. In order to gain a rational understanding of the electrochemical activity and overpotential findings of a specific catalyst, it is essential to recognize the limitations of Ni-foam on reflecting its intrinsic role in electrocatalytic activity. Ni-foam is therefore should not be preferred as a conductive substrate during electrochemical testing (ET). On the contrary, use of other neutral substrates like carbon fiber paper (CFP) and glassy carbon electrode (GCE) should be employed. © 2024, The Authors. All rights reserved.

关键词： Electrocatalysts

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