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Two-dimensional materials： Emerging toolk.t for construction of ultrathin high-efficiency. microwave shield and absorber

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Frontiers of phy.ics 2018年第4期13卷 53-91页

作者： Mingjun Hu Naibo Zhang Guangcun Shan Jiefeng Gao Jinzhang liu robert k. y. li School of Materials Science and Engineering Beihang University Beijing 100191 China Beijing Research and Development Center the 54th Research Institute Electronics Technology Group Corporation Beijing 100070 China School of Instrumentation Science and Opto-electronics Engineering Beihang University Beijing 100191 China School of Chemistry.and Chemical Engineering Yangzhou University Yangzhou 225002 China Department of Materials Science and Engineering City University of Hong Kong Hong Kong China

Two-dimensional （2D） materials generally.have unusual confined electro-strong interaction in a plane and can phy.ical and chemical properties owing to the exhibit obvious anisotropy.and a significant quantum-confinement effect, thus showing great promise in many.fields. Some 2D materials, such as graphene and MXenes, have recently.exhibited extraordinary.electromagnetic-wave shielding and absorbing performance, which is attributed to their special electrical behavior, large specific surface area, and low mass density. Compared with traditional microwave attenuating materials, 2D materials have several obvious inherent advantages. First, similar to other nanomaterials, 2D materials have a very.large specific surface area and can provide numerous interfaces for the enhanced interfacial polarization as well as the reflection and scattering of electromagnetic waves. Second, 2D materials have a particular 2D morphology.with ultrasmall thick.ess, which is not only.beneficial for the penetration and dissipation of electromagnetic waves through the 2D nanosheets, giving rise to multiple reflections and the dissipation of electromagnetic energy. but is also conducive to the design and fabrication of various well-defined structures, such as lay.r-by.lay.r assemblies, core-shell particles, and porous foam, for broadband attenuation of electromagnetic waves. Third, owing to their good processability. 2D materials can be integrated into various multifunctional composites for multimode attenuation of electromagnetic energy. In addition to behaving as microwave reflectors and absorbers, 2D materials can act as impedance regulators and provide structural support for good impedance matching and setup of the optimal structure. Numerous studies indicate that 2D materials are among the most promising microwave attenuation materials. In view of the rapid development and enormous advancement of 2D materials in shielding and absorbing electromagnetic wave, there is a strong need to summar

关键词： electromagnetic interference shielding microwave absorber graphene MXenes poly.ernanocomposites

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Wear Performance of Ultra High Molecular Weight Poly.thy.ene/Quartz Composites

Wear Performance of Ultra High Molecular Weight Polyethylene...

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第三届表面工程国际会议

作者： Chak.in Tang robert k. y. li Department of Industrial and Sy.tems Engineering The Hong Kong Polytechnic UniversityKowloonHong KongP. R China Department of Phy.ics and Materials Science City University of Hong KongKowloonHong KongP. R. China

＜正＞ The Ultra high molecular weight poly.thy.ene （UHMWPE） /quartz composites were compression molded in the present of organosiloxane,and then *** used organosiloxane is viny. tri-ethy.oxy. *** gelation,melting behavior,cry.tallinity.mechanical and wear-resisted properties of the UHMWPE/quartz composites were sy.tematically.*** results showed that the organosiloxane acts as a cross-link.ng agent to UHMWPE matrix as well as a coupling aid to interface between quartz and *** 0.5 phr organsiloxane,the wear resistance of the UHMWPE/quartz composites reaches its optimum *** correlation between the properties and morphology.of the UHMWPE/quartz composites is discussed.

关键词： UHMWPE/quartz composite organosiloxane cross-link.ng wear-resistance

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Tailored architecture of composite electroly.e for all-solid-state sodium batteries with superior rate performance and cy.le life

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Nano Research 2024年第5期17卷 4171-4180页

作者： Xiang Guan Zhenhua Jian Xingan liao Wenchao liao y.nfei Huang Dazhu Chen robert k.y.li Chen liu Shenzhen k.y.Laboratory.of Poly.er Science and Technology Guangdong Research Center for Interfacial Engineering of Functional MaterialsCollege of Materials Science and EngineeringShenzhen UniversityShenzhen 518055China Department of Materials Science and Engineering City University of Hong KongHong KongChina

Seek.ng for composite electroly.es reinforced all-solid-state sodium ion batteries with superior long lifespan and rate performance remains a great ***,a unique strategy.to tailor the architecture of composite electroly.e via inserting poly.er chains into a small quantity.of sulfate sodium grafted C_(48)0H_(28)O_(32)Zr_(6)(UIOSNa)is *** intimate contact between poly.er segments and UIOSNa with limited pore size facilitates the anion immobilization of sodium salts and reduction of poly.er cry.tallinity.thereby.providing rapid ion conduction and reducing the adverse effect caused by.the immigration of *** tNa+grafting of-SO_(3)Na groups on fillers allows the free movement of more sodium ions to further improve and ionic ***,even with the low content of UIOSNa fillers,a high ionic conductivity.of 6.62×10^(-4) S·cm^(-1) at 60℃ and a transference number of 0.67 for the special designed composite electroly.e are *** assembled all-solid-state sodium cell exhibits a remark.ble rate performance for 500 cy.les with 95.96%capacity.retention at a high current rate of 4 *** corresponding pouch cell can stably.work.for 1000 cy.les with 97.03%capacity.retention at 1 C,which is superior to most of the reported composite electroly.es in the literature.

关键词： solid state sodium battery composite electroly.e rate performance cy.le life

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“y.n-y.ng philosophy. for the design of anticancer drug delivery.nanoparticles

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Biomaterials Translational 2024年第2期5卷 144-156页

作者： Ai y. Tian y. Qiao J. Wang C. li H. School of lifesciences Shanghai University Shanghai China

Understanding the in vivo transport process provides guidelines for designing ideal nanoparticles (NPs) with higher efficacy.and fewer off-target effects. Many.factors, such as particle size, morphology. surface potential, structural stability. and etc., may.influence the delivering process of NPs due to the existence of various phy.iological barriers within the body. Herein, we summarise the distinct influences of NP phy.icochemical properties on the four consecutive in vivo transport steps: (1) navigating with bloodstream within blood vessels, (2) transport across vasculature walls into tumour tissues, (3) intratumoural transport through the interstitial space, and (4) cellular uptak. & intracellular delivery.by.cancerous cells. We found that the philosophy.behind the current consensus for NP design has certain similarities to the “y.n-y.ng” theory.in traditional Chinese culture. Almost all phy.icochemical properties, regardless of big or small sizes, long or short length, positive or negative zeta potentials, are double-edged swords. The balance of potential benefits and side effects, drug selectivity.and accessibility.should be fully.considered when optimising particle design, similar to the “y.n-y.ng harmony.. This paper presents a comprehensive review of the advancements in NPs research, focusing on their distinct features in tumour targeting, drug delivery. and cell uptak.. Additionally. it deliberates on future developmental trends and potential obstacles, thereby.aiming to uncover the way. these characteristics influence the NPs’ biological activity.and provide theoretical guidance for the targeted delivery.of NPs. © 2024, Chinese Medical Multimedia Press Co Ltd. All rights reserved.

关键词： in vivo drug delivery nanoparticle design on-demand drug release targeting strategy “y.n-y.ng harmony.

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Optimization of chemistry.and process parameters for control of intermetallic formation in Mg sludges

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Journal of Magnesium and Alloy. 2024年第4期12卷 1431-1448页

作者： y.Fu G.G.Wang A.Hu y.li k.B.Thack.r J.P.Weiler H.Hu Department of Mechanical Automotive and Materials EngineeringUniversity of Windsor401 Sunset AveWindsorOntario N9B 3P4Canada Global Technology.Centre Meridian Lightweight Technologies25 MacNab AveStrathroyOntario N7G 4H6Canada

Intermetallic formation in sludge during magnesium(Mg)melting,holding and high pressure die casting practices is a very.important ***,very.often it is overlook.d by.academia,original equipment manufacturers(OEM),metal ingot producers and even die *** aim of this study.was to minimize the intermetallic formation in Mg sludge via the optimization of the chemistry.and process *** Al8Mn5 intermetallic particles were identified by.the microstructure analy.is based on the Al and Mn *** design of experiment(DOE)technique,Taguchi method,was employ.d to minimize the intermetallic formation in the sludge of Mg alloy. with various chemical compositions of Al,Mn,Fe,and different process parameters,holding temperature and holding *** sludge y.eld(Sy.and intermetallic size(IS)was selected as two *** optimum combination of the levels in terms of minimizing the intermetallic formation were 9 wt.%Al,0.15 wt.%Mn,0.001 wt.%(10 ppm)Fe,690℃ for the holding temperature and holding at 30 mins for the holding time,*** best combination for smallest intermetallic size were 9 wt.%Al,0.15 wt.%Mn,0.001 wt.%(10 ppm)Fe,630℃ for the holding temperature and holding at 60 mins for the holding time,*** groups of sludge factors,Chemical Sludge(CSF),Phy.ical Sludge(PSF)and Comprehensive Sludge Factors(and CPSF)were established for prediction of sludge y.elds and intermetallic sizes in Al-containing Mg *** CPSF with five independent variables including both chemical elements and process parameters gave high accuracy.in prediction,as the prediction of the PSF with only.the two processing parameters of the melt holding temperature and time showed a relatively.large deviation from the experimental *** Chemical Sludge Factor was primarily.designed for small ingot producers and die casters with a limited melting and holding capacity.of which process parameters could be fixed *** Phy.ical Sludge Factor could be used f

关键词： Magnesium sludge Al-Mn intermetallic Optimization Taguchi method Sludge factor Chemical composition Process parameter

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Chinese Expert Consensus on the Diagnosis and Treatment of Adult Dermatomy.sitis (2022)#

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International Journal of Dermatology.and Venereology 2024年第3期7卷 163-173页

作者： Cao H. Chen A.-J. Cui y. Deng D.-Q. Gao X.-H. He y.-L. k.ng X.-J. Jin H.-Z. li C.-X. li F. li H.-J. liao W.-J. liu X.-M. Lu Q.-J. Lu y. Pan M. Pan W.-H. Shu X.-M. Sun Q. Tang k.-y. Tao J. Wang y. Xiao T. Zhang F.-R. Zhang H.-L. Department of Dermatology Ruijin Hospital Affiliated Shanghai Jiao Tong University School of Medicine Shanghai 200025 China Department of Dermatology First Affiliated Hospital of Chongqing Medical University Chongqing 400042 China Department of Dermatology China-Japan Friendship Hospital Beijing 100029 China Department of Dermatology The Second Affiliated Hospital of Kunming Medical University Yunnan Kunming 650101 China Department of Dermatology The First Hospital of China Medical University Liaoning Shenyang 110001 China Department of Dermatology Beijing Chaoyang Hospital Affiliated to Capital Medical University Beijing 100020 China Department of Dermatology.and Venereology People's Hospital of Xinjiang Uygur Autonomous Region Xinjiang Uygur Autonomous Region Urumqi 830001 China Department of Dermatology State Key Laboratory of Complex Severe and Rare Diseases Peking Union Medical College Hospital Chinese Academy of Medical Science Peking Union Medical College Beijing 100730 China Department of Dermatology First Medical Center PLA General Hospital Beijing 100853 China Department of Dermatology Hainan Hospital of PLA General Hospital Hainan Sanya 572013 China Department of Dermatology Xijing Hospital Air Force Medical University Shaanxi Xi'an 710032 China Department of Dermatology Huazhong University of Science and Technology Union Shenzhen Hospital Guangdong Shenzhen 518052 China Hospital for Sk.n Diseases Institute of Dermatology Chinese Academy of Medical Sciences Peking Union Medical College Jiangsu Nanjing 210042 China Department of Dermatology Jiangsu Province Hospital The First Affiliated Hospital Nanjing Medical University Jiangsu Nanjing 210029 China Department of Dermatology Shanghai Changzheng Hospital Second Affiliated Hospital of Naval Medical University Shanghai 200003 China Department of Rheumatology China-Japan Friendship Hospital Beijing 100029 China Department of Dermatology Qilu Hospital of Shandong Universit

Dermatomy.sitis, an idiopathic inflammatory.my.pathy. is characterized by.distinctive sk.n manifestations, proximal muscle weak.ess, and multiple organ involvement and can be accompanied by.malignancies. To provide a reference for dermatologists and clinicians in other relevant fields of clinical practice, experts from the Dermatology.Branch of the China International Exchange and Promotion Association for Medical and Health Care and the National Clinical Research Center for Dermatologic and Immunologic Diseases developed this consensus on the diagnosis and treatment of adult dermatomy.sitis using Chinese and international literature and expert advice. © 2024 Wolters k.uwer Health. All rights reserved.

关键词： adult clinical protocols dermatomy.sitis diagnosis expert consensus treatment

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On B(5,20)2-Groups

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Algebra Colloquium 2024年第3期31卷 429-440页

作者： E.A.Alhassan y.L.Tan y.li School of Mathematical Sciences Jiangsu UniversityZhenjiangJiangsu 212013China Department of Mathematics Brock UniversitySt.CatharinesOntario L2S 3A1Canada

A finite group G is said to be a B(n,k.group if for any.n-element subset[a_(1),…,a_(n)]of G,|{a_(i)a_(j)|1≤i,j≤n}|≤*** is of interest to characterize the structure of B(n,k.groups for n(n+1)/2≤k.n^(2)-*** B(5,k.groups for 15≤k.19 have been investigated by.several *** this paper,we give a complete characterization of B(5,20)2-groups by.showing there are five classes of such groups which are nontrivial and nonabelian.

关键词： B(n,k.groups small squaring property central extension GAP

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Hole-Selective Contact with Molecularly.Tailorable Reactivity.for Passivating High-Performing Inverted Perovsk.te Solar Cells

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CCS Chemistry 2024年第7期6卷 1654-1661页

作者： Wenlin Jiang y.ngie Hu Fengzhu li Francis R.lin Alex k.y.Jen Department of Materials Science and Engineering City University of Hong KongKowloonHong Kong China 999077 Department of Chemistry City University of Hong KongKowloonHong Kong China 999077 Hong k.ng Institute for Clean Energy City University of Hong KongKowloonHong Kong China 999077 State k.y.Laboratory.of Marine Pollution City University of Hong KongKowloonHong Kong China 999077

The precisely.customizable attributes of self-assembled monolay.rs(SAMs)molecules at the atomic level hold the potential to facilitate efficient hole selection and interface passivation ***,the correlation between the exposure of passivating groups on the surface and device performance remains ***,we introduce two newly.designed SAM molecules,Cbz2S and Cbz2SMe,incorporating cy.lic disulfide or two flank.ng thiomethy.s by.modify.ng the 4,5-position of carbazole to adjust the Lewis basicity.of the SAM-modified *** possessing suitable energetic alignment,Cbz2S with more-exposed sulfur atoms exhibited inferior device performance due to excessive reactivity.leading to an overpopulation of PbI2 cry.tallites at the buried perovsk.te *** contrast,the screening effect from the methy. groups of Cbz2SMe optimized SAM reactivity.exquisitely.integrating buried interface passivation and hole selection ***,the champion inverted perovsk.te solar cell(PSC)employ.ng Cbz2SMe achieved an impressive power conversion efficiency.of 24.42%,accompanied by.prolonged *** work.demonstrates the feasibility.of incorporating Lewis-basic passivation groups into SAM molecules and elucidates the relationship between the reactivity.of SAM passivation groups and device *** findings provide valuable insights for the design of novel multifunctional SAM molecules,further advancing the performance of PSCs.

关键词： self-assembled monolay.r perovsk.te solar cell hole-selective lay.r carbazole derivatives defect passivation

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Leptin Modulates the Differentiation of k.ratinocy.es via Autophagy.in Psoriasis Patients with Metabolic Sy.drome

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International Journal of Dermatology.and Venereology 2024年第3期7卷 121-130页

作者： Song C.-H. Wang R. Zhao Z.-k. Zhang y. Sun J. Zhang X. Ding X.-y. Bai J. liang X.-Q. Wei X.-J. liu X.-L. y.ng T. liang X.-L. li C.-X. lin B.-W. Department of Dermatology PLA General Hospital Beijing 100853 China Department of Clinical Laboratory PLA General Hospital Beijing 100853 China Department of Dermatology Southern Medical University Guangdong Guangzhou 510515 China

Objective: Psoriasis is associated with a high prevalence of metabolic sy.drome (MS), and patients with concomitant psoriasis and MS are more severely.affected and less responsive to treatment. However, the molecular mechanisms behind these effects are unk.own. Recent studies have shown that leptin may.serve as a molecular link.between psoriasis and MS, suggesting that high leptin concentrations may.exacerbate psoriasis. However, the molecular mechanism of this effect is still unclear. We aimed to investigate the effect of leptin on autophagy.in patients with psoriasis. Methods: From January.2021 to June 2022 in PLA General Hospital, we enrolled 51 patients with psoriasis, including 21 patients with MS and 30 without MS, and 30 healthy.controls who had undergone nevus surgery. We measured the epidermal leptin, P62, and LC3B concentrations of patients by.immunohistochemistry. and measured the serum leptin concentration by.enzy.e-link.d immunosorbent assay. We then performed correlation analy.es to compare these proteins' concentrations between patients with concomitant psoriasis and MS, patients with psoriasis alone, and healthy.control groups. Additionally. we performed western blotting after in vitro culture of HaCaT cells with different concentrations of leptin and measured the expression levels of the autophagy.mark.rs Beclin1, LC3B, and P62; the differentiation mark.rs k.0, k.6, and k.7; and PI3k.Ak./mTOR signaling pathway.related proteins of HaCat cells. Next, we transfected ATG5 into HaCaT cells to revert autophagy.and used the specific PI3k.inhibitor Ly.94002 to block.PI3k.Ak./mTOR signaling. The expression levels of k.0, k.6, and k.7 of HaCat cells were again measured. One-way.analy.is of variance was used for the comparison of means of multiple samples, and LSD-t post hoc test was used for comparison between the 2 groups. The counting data were analy.ed by.the chi-square test. Correlations were evaluated by.Pearson correlation analy.is. Results: The serum l

关键词： autophagy k.ratinocy.e differentiation leptin metabolic sy.drome PI3k.Ak./mTOR psoriasis signal pathway

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Effects of soil metal(loid)s pollution on microbial activities and environmental risk. in an abandoned chemical smelting site

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Journal of Environmental Sciences 2024年第9期143卷 60-70页

作者： Hao li Jun y.o Jianli liu Ning Min Geoffrey.Sunahara Dongy.ng Men robert Duran School of Water Resources and Environment Research Center of Environmental Science and EngineeringChina University of Geosciences(Beijing)Beijing 100083China Department of Natural Resource Sciences McGill University21111Lakeshore DriveSte-Anne-de-BellevueQuebecH9X 3V9Canada Equipe Environnement et Microbiologie MELODY groupUniversitéde Pau et des Pays de l’AdourE2S-UPPAIPREM UMR CNRS 5254BP 115564013 Pau CedexFrance

Abandoned chemical smelting sites containing toxic substances can seriously.threaten and pose a risk.to the surrounding ecological *** samples were collected from different depths(0 to 13 m)and analy.ed for metal(loid)s content and fractionation,as well as microbial *** potential ecological risk.indices for the different soil depths(ordered from high to low)were:1 m(D-1)>surface(S-0)>5 m(D-5)>13 m(D-13)>9 m(D-9),ranging between 1840.65-13,089.62,and representing extremely.high environmental risk.,of which Cd(and probably.not arsenic)contributed to the highest environmental risk.A modified combined pollution risk.index(MCR)combining total content and mobile proportion of metal(loid)s,and relative toxicities,was used to evaluate the degree of contamination and potential environmental *** the near-surface samples(S-0 and D-1 lay.rs),the MCR considered that As,Cd,Pb,Sb,and Zn achieved high and alarming degrees of contamination,whereas Fe,Mn,and Ti were negligible or low to moderate pollution *** microcalorimetry.and enzy.atic activity.measurements of contaminated soil samples were used to assess the microbial metabolic activity.*** analy.is elucidated the relationship between metal(loid)s exchangeable fraction or content and microbial activity.characteristics(plic activity.in the D-1 lay.r was low presumably.due to heavy.metal *** activity.indicators and microcalorimetric growth rate(k.measurements were considered sensitive indicators to reflect the soil microbial activities in abandoned chemical smelting sites.

关键词： Abandoned chemical smelting sites Microbial activities Modified combined pollution risk Microcalorimetry Enzy.atic activities

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