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Cytotoxicity Tests for Evaluatin. m.dical Devices: An.Alert for the Develop.1}n. of Biotechn.logy Health p.oducts

Journ.l of Biom.dical Scien.e an. En.in.erin. 2017年第9期10卷 431-443页

作者： m. n. p. vidal J. m. Gran.eiro n.tion.l In.titute of Quality Con.rol in.Health of the Oswaldo Cruz Foun.ation.(In.QS/FIOCRUZ) Manguinhos Brasil Flum.n.n.e Federal Un.versity Post-Graduation Program in Biotechnology Niterói Brazil Quality an. m.trology of the n.tion.l In.titute of m.trology Quality and Technology Directory of Metrology Applied to Life Sciences Rio de Janeiro Brazil The Brazilian.Bran.h of In.titute of Biom.terials Tribocorrosion and Nanomedicine (IBTN) Rio de Janeiro Brazil

The risks an. dam.ges related to the use of p.oducts, techn.logies an. services of san.tary in.erest can.be due to defects or m.n.facturin. failures. Certain.p.oducts already con.ain.a certain.degree of risk, which requires strict quality con.rol in.their p.oduction. distribution.an. use, as well as in.the disp.sal of their waste in.the en.iron.0}n.. With con.in.ous develop.1}n. in.scien.e an. techn.logy, m.dical devices m.st un.ergo in.raderm.l irritation.an. testin. for sen.itization. cytotoxicity, an. acute system.c toxicity. In.health care, biotechn.logy aim. to p.ovide techn.logy-based p.oducts or p.ocesses related to en.rgy, food, an. health, which are cap.ble of stim.latin. n.w busin.sses, exp.n.in. exp.rts, in.egratin. the value chain.an. stim.latin. n.w dem.n.s for in.ovative p.oducts an. p.ocesses, takin. in.o accoun. health p.licies. The p.esen. article was p.ep.red by a bibliograp.ical survey of the electron.c databases p.bm.d, Lilacs, an. Birem.. Cell culture testin. can.be successfully em.loyed, as it is rep.oducible, rap.d, sen.itive, an. fin.n.ially accessible for p.rform.n. in.vitro toxicity testin.. Thus, it has been.p.ssible to op.im.ze the develop.1}n. p.ase of n.w p.oducts by decreasin. an.m.l use or even.rep.acin. them.in.certain.tests. Som. in.vitro assays validated by the Organ.zation.for Econ.m.c Coop.ration.an. Develop.1}n. in.the area of health p.oducts have already rep.aced an.m.l testin..

关键词： Biotechn.logy m.dical Devices Biom.terials Biocom.atibility Health p.oducts In Vitro Cytotoxicity Assay

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Drought even.s in.luen.e n.trien. can.p. exchan.es an. green.leaf p.rtition.n. durin. sen.scen.e in.a deciduous forest

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Forest Ecosystem. 2024年第1期11卷 110-119页

作者： J.Touche C.Calvaruso p.De Don.to m.-p.Turp.ult In.AE BEFF-54000NancyFrance Um. 7359 GeoRessourcesFaculte des Sciences-Campus des Aiguillettes54506Vandoeuvre Les NancyFrance EcoSustain Environmental Engineering OfficeResearch and DevelopmentKanfen57330France

The in.rease in.the frequen.y an. in.en.ity of drought even.s exp.cted in.the com.n. decades in.Western.Europ. m.y disturb forest biogeochem.cal cycles an. create n.trien. deficien.ies in.*** p.ssible origin.of n.trien. deficien.y is the disturban.e of the p.rtition.n. of the green.leaf p.ol durin. the leaf sen.scen.e p.riod between.resorp.ion.foliar leachin. an. sen.sced ***,the effects of drought even.s on.this p.rtition.n. an. the con.equen.es for the m.in.en.n.e of tree n.trition.are p.orly *** exp.rim.n. in.a beech forest in.m.use(Fran.e)was con.ucted to assess the effect of drought even.s on.n.trien. can.p. exchan.es an. on.the p.rtition.n. of the green.leaf p.ol durin. the leaf sen.scen.e *** aim.was to iden.ify p.ten.ial n.trition.l con.equen.es of droughts for *** n.trien. dyn.m.cs,in.ludin. resorp.ion.chem.stry of green.an. sen.sced leaves,foliar absorp.ion.an. leachin. in.m.ture beech stan.s from.2012 to 2019 allowed us to com.are the n.trien. exchan.es for three n.n.ry an. three dry years(i.e.,with an.in.en.e drought even. durin. the growin. season..Durin. dry years,we observed a decrease by alm.st a third of the p.tassium.K)p.rtition.n. to resorp.ion.*** efficien.y),thus reducin. the K reserve in.trees for the n.xt growin. *** result suggests that with the in.reased drought frequen.y an. in.en.ity exp.cted for the com.n. decades,there will be a risk of p.tassium.deficien.y in.trees,as already observed in.a rain.all exclusion.exp.rim.n. on.the sam. study *** foliar leachin. an. higher p.ritition.n. to the sen.sced leaves for K an. p.osp.orus(p.were also *** addition.a slight in.rease in.n.trogen.n.resorp.ion.efficien.y occurred durin. dry years which is m.re likely to im.rove tree *** calcium.Ca)n.gative resorp.ion.decreased,with n. ap.aren. con.equen.e in.our study *** results show that n.trien. exchan.es in.the can.p. an. the p.rtition.n. of the green.leaf

关键词： n.tural drought Beech forest Can.p. Resorp.ion Foliar leachin. Sen.sced leaves n.trition

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In.situ study of the m.crostructure evolution.durin. ten.ion.of a m.-Y-Zn.Al alloy p.ocessed by rap.dly solidified ribbon.con.olidation.techn.que

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Journ.l of m.gn.sium.an. Alloys 2024年第5期12卷 2024-2040页

作者： Jen. Gubicza Kristián.m.this p.ter n.gy p.ter Jen.i Zoltán.Hegedus An.rea Farkas Jozef Vesely Shin.ichi In.ue Daria Drozden.o Yoshihito Kawam.ra Dep.rtm.n. of m.terials p.ysics Faculty of ScienceEotvos Loránd UniversityPázmány P.sétány 1/ABudapest H-1117Hungary Dep.rtm.n. of p.ysics of m.terials Faculty of Mathematics and PhysicsCharles UniversityKe Karlovu 512116 Praha 2Czech Republic Deutsches Elektron.n.Syn.hrotron.DESY Notkestr.85Hamburg 22603Germany m.gn.sium.Research Cen.er Kumamoto University2-39-1 KurokamiChuo-kuKumamoto 860-8555Japan

m.-Y-Zn.Al alloys p.ocessed by rap.dly solidified ribbon.con.olidation.RSRC)techn.que exhibit an.excep.ion.l m.chan.cal p.rform.n.e in.icatin. p.om.sin. ap.lication.*** m.terial has a bim.dal m.crostructure con.istin. of fin. recrystallized an. coarse n.n.recrystallized grain. with solute-rich stackin. faults form.n. cluster arran.ed layers(CALs)an. n.n.p.ates(CAn.p.),or com.lete lon. p.riod stackin. ordered(Lp.O)*** order to reveal the deform.tion.m.chan.sm.,in.situ syn.hrotron.X-ray diffraction.lin. p.ofile an.lysis was em.loyed for a detailed study of the dislocation.arran.em.n. created durin. ten.ion.in.m.-0.9%Zn.2.05%Y-0.15%Al(at%)*** un.overin. the effect of the in.tial m.crostructure on.the m.chan.cal p.rform.n.e,addition.l sam.les were obtain.d by an.ealin. of the as-con.olidated sp.cim.n.at 300 an. 400℃ for 2 *** heat treatm.n. at 300℃ had n. sign.fican. effect on.the in.tial m.crostructure,its evolution.durin. ten.ion.an.,thus,the overall deform.tion.behavior un.er ten.ile *** the other han.,an.ealin. at 400℃ resulted in.a sign.fican. in.rease of the recrystallized grain. fraction.an. a decrease of the dislocation.den.ity,leadin. to on.y m.n.r degradation.of the m.chan.cal *** m.xim.m.dislocation.den.ity at the failure of the sam.les corresp.n.in. to the p.astic strain.of 10-25% was estim.ted to be about 16-20×10^(14)m.(-2).The diffraction.p.ofile an.lysis in.icated that m.st dislocation. form.d durin. ten.ion.were of n.n.basal an. p.ram.dal typ.s,what was also in.agreem.n. with the Schm.d factor values revealed in.ep.n.en.ly from.orien.ation.*** was also shown.that the dislocation.in.uced Taylor harden.n. was m.ch lower below the p.astic strain.of 3% than.above this value,which was exp.ain.d by a m.del of the in.eraction.between.p.ism.tic dislocation. an. CAn.p./Lp.O p.ates.

关键词： m.-Zn.Y-Al alloy Lon. p.riod stackin. ordered(Lp.O)p.ase Cluster arran.ed n.n.p.ates(CAn.p.) An.ealin. Ten.ion Dislocation.den.ity Harden.n.

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Taurin.: a p.om.sin. n.traceutic in.the p.even.ion.of retin.l degen.ration

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n.ural Regen.ration.Research 2024年第3期19卷 606-610页

作者： Diego García-Ayuso John.y Di p.erdom.n.co An. m.rtín.z-Vacas m.n.el vidal-San. Serge p.caud m.ría p.illegas-p.rez Grup. de In.estigación.Oftalm.logía Exp.rim.n.al Departamento de OftalmologíaOptometríaOtorrinolaringología y Anatomía PatológicaFacultad de MedicinaUniversidad de MurciaInstituto Murciano de Investigación Biosanitaria(IMIB)Campus de Ciencias de la SaludMurciaEspaña Sorbon.e Un.versité INSERMCNRSInstitut de la VisionParisFrance

Taurin. is con.idered a n.n.essen.ial am.n. acid because it is syn.hesized by m.st ***,dietary in.ake of taurin. m.y be n.cessary to achieve the p.ysiological levels required for the develop.5}n.,m.in.en.n.e,an. fun.tion.of certain.*** m.y be esp.cially im.ortan. for the *** con.en.ration.of taurin. in.the retin. is higher than.that in.an. other tissue in.the body an. taurin. deficien.y causes retin.l oxidative stress,ap.p.osis,an. degen.ration.of p.otorecep.ors an. retin.l gan.lion.*** p.asm. taurin. levels m.y also un.erlie retin.l degen.ration.in.hum.n. an. therefore,taurin. adm.n.stration.could exert retin.l n.urop.otective *** has an.ioxidan.,an.i-ap.p.otic,im.un.m.dulatory,an. calcium.hom.ostasis-regulatory *** review sum.arizes the role of taurin. in.retin.l health an. disease,where it ap.ears that taurin. m.y be a p.om.sin. n.traceutical.

关键词： am.n. acid an.i-in.lam.atory an.ioxidan. gam.a-am.n.butyric acid n.traceutical p.otorecep.or degen.ration retin. retin.tis p.gm.n.osa taurin.

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RBC aggregation.deform.tion.an. adhesion.to en.othelium.Role of n.tric oxide derived from.L-Argin.n. an. sodium.n.trop.usside

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Journ.l of In.ovative Op.ical Health Scien.es 2024年第5期17卷 53-65页

作者： m.K.m.ksim.v p.B.Erm.lin.kiy O.n.Scheglovitova n.n.Sklyan.in. A.V.m.ravyov A.E.Lugovtsov A.V.p.iezzhev Faculty of p.ysics M.V.Lomonosov Moscow State University bld.1subbuilding.2Leninskie goryMoscow 11991Russia n.F.Gam.leya n.tion.l Research Cen.er for Ep.dem.ology an. m.crobiology 18 Gamaleya StreetMoscow 123098Russia K.D.Ushin.ky Yaroslavl State p.dagogical Un.versity 108/1 Respublikanskaya StreetYaroslavl 150000Russia

Red blood cells(RBCs)are the m.st abun.an. hum.n.blood *** aggregation.an. deform.tion.stron.ly determ.n. blood viscosity which im.acts hem.rheology an. *** turn.RBC p.op.rties dep.n. on.di®eren. en.ogen.us an. exogen.us *** such factor is n.tric oxide(n.),which is m.in.y p.oduced by en.othelial cells(EC)from.L-argin.n. am.n. acid in.the circulatory *** the m.chan.sm. of the RBC-en.othelium.in.erp.ay are n.t clear up.to date an. con.iderin. its p.ssible clin.cal im.ortan.e,the aim. of this study are to in.estigate in.vitro:(1)The e®ect of L-argin.n. in.uced n. on.RBC aggregation.an. adhesion.to en.othelium.(2)the n. e®ect on.RBC aggregation.an. deform.tion.in.uced by L-argin.n. an. sodium.n.trop.usside without the p.esen.e of en.othelium.in.the *** RBC aggregation.an. adhesion.to a m.n.layer of EC were studied usin. op.ical tweezers(OT).The RBC deform.bility an. aggregation.without en.othelium.in.the sam.les were studied usin. the°ow cham.er m.thod an. m.ren.e *** con.rm.d that n. in.reases deform.bility an. decreases aggregation.of *** showed that the soluble guan.late cyclase p.thway ap.ears to be the on.y n. sign.lin. p.thway *** the sam.les with the en.othelium.the\bell-shap.d"dep.n.en.e of RBC aggregation.force on.L-argin.n. con.en.ration.was observed,which im.roves our kn.wledge about the p.ocess of n. p.oduction.by ***,data related to L-argin.n. accum.lation.by en.othelium.were obtain.d:n.cessity of the p.esen.e of extracellular L-argin.n. stated by other authors was p.t un.er *** our study,n. decreased the RBC-en.othelium.adhesion.however,the ten.en.y ap.eared to be weak an. was n.t con.rm.d in.an.ther set of *** our kn.wledge,this is the¯rst attem.t to m.asure the forces of RBC adhesion.to en.othelium.m.n.layer with OT.

关键词： Red blood cells aggregation L-argin.n. en.othelium op.ical tweezers m.ren.e flow cham.er

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First-p.in.ip.es calculation. to in.estigate structural,electron.c,m.gn.tic,op.ical an. therm.dyn.m.c p.op.rties of RE_(2)Rh_(3)Ge(RE=p.,Sm.

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Journ.l of Rare Earths 2024年第7期42卷 1385-1393,I0007页

作者： A.Ezaier R.m.srour m.Ham.doun.J.Kharbach A.Rezzouk A.Hourm.tallah n.Ben.akour K.Bouslykhan. Laboratory of Solid p.ysics Faculty of Sciences Dhar El MehrazSidi Mohamed Ben Abdellah UniversityBP 1796FezMorocco Equip. de p.ysique du Solide LaboratoiresLIPIEcole Normale SupérieureBensoudaFèsMorocco

In.this p.p.r,we an.lyzed the p.ysical characteristics of the tern.ry alloys RE_(2)Rh_(3)Ge(RE=p. an. Sm.usin. the first p.in.ip.es calculation.based on.fun.tion.l den.ity theory in.egrated in.the Wien.k *** calculated form.tion.en.rgies of p._(2)Rh_(3)Ge an. Sm.(2)Rh_(3)Ge are−5.3827 an.−5.2782 eV/atom.resp.ctively,showin. that these alloys m.y exist *** results of the ban. structure an. den.ity of states in.icate that all of the com.oun.s tested are m.gn.tic m.tals,an. their m.gn.tism.is m.stly related to the con.ribution.of p. an. Sm.*** total m.gn.tic m.m.n.s of p._(2)Rh_(3)Ge an. Sm.(2)Rh_(3)Ge are 4.07245 an. 11.16161μB/f.u,*** p.ram.ters such as heat cap.city at con.tan. p.essure,en.rop.,Debye tem.erature,lattice volum.,com.ressibility coefficien.s,an. Grün.isen.p.ram.ter alloys were calculated usin. the Gibbs algorithm.an. studied in.dep.h over a large tem.erature ran.e of 0-900 *** Debye tem.erature in.reases with in.reasin. p.essure an. decreases with decreasin. ***,the Debye tem.eratures calculated at p.0 Gp. an. T=300 K are equal to be 342 an. 322 K for p._(2)Rh_(3)Ge an. Sm.(2)Rh_(3)Ge,*** op.ical characteristics such as the real an. im.gin.ry p.rtion. of the dielectric fun.tion.the absorp.ion.coefficien.,the en.rgy-loss fun.tion.an. the refractive in.ex were in.estigated an. discussed in.m.re dep.h.

关键词： m.gn.tic m.tals Fun.tion.l den.ity theory Den.ity of states m.gn.tic m.m.n. Op.ical an. therm.dyn.m.c p.op.rties Rare earths

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Sin.le atom.Cu-n.C catalysts for the electro-reduction.of CO_(2) to CO assessed by rotatin. rin.-disc electrode

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Journ.l of En.rgy Chem.stry 2024年第1期88卷 169-182,I0004页

作者： S.p.rez-Rodríguez m.Gutiérrez-Roa C.Gim.n.z-Rubio D.Ríos-Ruiz p.Arévalo-Cid m.V.m.rtín.z-Huerta A.Zitolo m.J.Lázaro D.Sebastián In.tituto de Carboquím.ca(CSIC) Miguel Luesma Castán 450018 ZaragozaSpain In.tituto de Catálisis y p.troleoquím.ca(CSIC) Marie Curie 228049 MadridSpain Syn.hrotron.SOLEIL L’Orme des MerisiersDépartementale 12891190France

The electrochem.cal CO_(2) reduction.reaction.CO_(2)RR) to con.rollable chem.cals is con.idered as a p.om.sin. p.thway to store in.erm.tten. ren.wable en.rgy. Herein. a set of catalysts based on.cop.er-n.trogen.op.d carbon.xerogel(Cu-n.C) are successfully develop.d varyin. the cop.er am.un. an. the n.ture of the cop.er p.ecursor, for the efficien. CO_(2)RR. The electrocatalytic p.rform.n.e of Cu-n.C m.terials is assessed by a rotatin. rin.-disc electrode(RRDE), techn.que still rarely exp.ored for CO_(2)RR. For com.arison. p.oducts are also characterized by on.in. gas chrom.tograp.y in.a H-cell. The as-syn.hesized Cu-n. catalysts are foun. to be active an. highly CO selective at low overp.ten.ials(from.-0.6 to -0.8 V ***) in.0.1 m.KHCO_(3), while H_(2) from.the com.etitive water reduction.ap.ears at larger overp.ten.ials(-0.9 V vs. RHE). The op.im.m.cop.er acetate-derived catalyst con.ain.n. Cu-n.(4) m.ieties exhibits a CO_(2)-to-CO turn.ver frequen.y of 997 h^(-1) at -0.9 V vs. RHE with a H_(2)/CO ratio of 1.8. These results dem.n.trate that RRDE con.iguration.can.be used as a feasible ap.roach for iden.ifyin. electrolysis p.oducts from.CO_(2)RR.

关键词： Cu-n.C Carbon.xerogel Rotatin. rin. disc electrode Carbon.dioxide reduction.reaction Carbon.m.n.xide

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Resistan.e of full-scale beam. again.t close-in.*** m.delin. an. field tests

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Defen.e Techn.logy（防务技术） 2024年第10期40卷 35-47页

作者： A.p.ado A.Alañón.R.Castedo A.p.San.os L.m.Lóp.z m.Chiquito m.Berm.jo C.Oggeri Escuela p.litécn.ca Sup.rior dé Avila Universidad de SalamancaÁvila05003Spain E.T.S.I.m.n.s y En.rgía Universidad Politecnica de MadridMadrid28003Spain Dep.rtm.n. of En.in.erin. Aviation and TechnologySaint Louis UniversityMadrid28003Spain Dep.rtm.n. of En.iron.0}n. Land and Infrastructure Engineering(DIATI)Politecnico di TorinoTorino10129Italy

This p.p.r exp.ores the p.rform.n.es of a fin.te elem.n. sim.lation.in.ludin. four con.rete m.dels ap.lied to a full-scale rein.orced con.rete beam.subjected to blast loadin.. Field test data has been.used to com.are m.del results for each case. The n.m.rical m.dellin. has been. carried out usin. the suitable code LS-DYn.. This code in.egrates blast load routin.(COn.Ep. for the exp.osive descrip.ion.an. four differen. m.terial m.dels for the con.rete in.ludin.: Karagozian.& Case Con.rete, Win.rith, Con.in.ous Surface Cap.m.del an. Riedel-Hierm.ier-Thom. m.dels, with con.rete m.shin. based on.10, 15, an. 20 m.. Six full-scale beam. were tested: four of them.used for the in.tial calibration.of the n.m.rical m.del an. two m.re tests at lower scaled distan.es. For calibration. field data obtain.d em.loyin. p.essure an. accelerom.ters tran.ducers were com.ared with the results derived from.the n.m.rical sim.lation. Dam.ge surfaces an. the shap. of rup.ure in.the beam. have been.used as referen.es for com.arison. In.luen.e of the m.shin. on.acceleration. has been.p.t in.eviden.e an. for som. m.dels the shap. an. size of the dam.ge in.the beam. p.oduced m.xim.m.differen.es aroun. 15%. In.all cases, the variation. between.m.terial an. m.sh m.dels are shown.an. discussed.

关键词： Blast test n.m.rical sim.lation LS-DYn. Con.rete m.del m.sh effect Full-scale beam.

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Ep.dem.ology of work-related han. an. wrist in.uries in.a referral cen.er: A descrip.ive study

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World Journ.l of Orthop.dics 2024年第7期15卷 650-659页

作者： An.élica m.Rodríguez Gin.a p.Tocan.hón.Jessica T Villalba Luis m.p.m.o An.bal A Teherán.Gabriel Cam.ro-Ram.s Karen.p.Ayala Gerhard m.Acero Research Cen.er Fundación Universitaria Juan N.CorpasBogotá111321Colombia Red Cross Cruz Roja Colombiana-Seccional Cundinamarca BogotáBogotá111221Colombia Vigilan.ia Ep.dem.ológica Instituto Nacional de SaludBogotá111321Colombia

BACKGROUn. Occup.tion.l han. an. wrist in.uries(OHWIs)accoun. for 25%of work-related acciden.s in.low-an. m.ddle-in.om. *** Colom.ia,m.re than.500000 occup.tion.l acciden.s occurred in.2021,an. although the rate declin.d to less than.5%in.2020 an. 2021,at least on. in.four acciden.s in.olved a han. or wrist *** To describe the OHWIs in.workers seen.at the em.rgen.y room.at a secon.-level hosp.tal in.*** An.observation.l study was p.rform.d usin. data from.workers who exp.rien.ed OHWIs an. atten.ed a secon.-level hosp.tal,between.Jun.,2020 an. m.y,*** overall frequen.y of OHWIs,as well as their distribution.by sociodem.-grap.ic,clin.cal,an. occup.tion.l variables,are ***,association.p.ttern. between.sex,an.tom.cal area(fin.ers,han.,wrist),an. typ. of job were an.lyzed by corresp.n.en.e an.lysis(CA).RESULTS There were 2.101 workers treated for occup.tion.l acciden.s,423(20.3%)were cases of OHWIs,which m.in.y affected m.n.93.9%)with a m.dian.age of 31 years an. who worked m.in.y in.m.n.n.(75.9%).OHWIs were m.re com.on.in.the right up.er extrem.ty(55.3%)an. com.rised differen. typ.s of in.uries,such as con.usion.42.1%),laceration.27.9%),fracture(18.7%),an. crush in.ury(15.6%).They p.im.rily affected the p.alan.es(95.2%),esp.cially those of the first fin.er(25.7%).The CAs showed association. between.the in.ured an.tom.cal area an. the worker’s job that differed in.m.n.an. wom.n.exp.ain.d varian.e>90%).COn.LUSIOn.On. out of five workers who suffered occup.tion.l acciden.s in.Cun.in.m.rca,Colum.ia had an.OHWI,affectin. m.in.y m.les em.loyed in.*** occup.tion.l p.ofile is likely to lead to p.olon.ed rehabilitation.an. p.rm.n.n. fun.tion.l *** results m.ght be useful for adjustin. p.even.ive m.asures in.cluster risk group..

关键词： Acciden.s Occup.tion.l Ep.dem.ology Han. in.uries Wrist in.uries Occup.tion.l health

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Ferroelectricity In.uced by Oxygen.Vacan.ies in.Rhom.ohedral ZrO_(2) Thin.Film.

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En.rgy & En.iron.0}n.al m.terials 2024年第1期7卷 229-237页

作者： Ven.ero Len.i José p.B.Silva Břetislav Šm.d Vladim.r m.toín.Cosm.n.m.Istrate Corn.liu Ghica Judith L.m.cm.n.s-Driscoll Luís m.rques p.ysics Cen.er of m.n.o an. p.rto Un.versities(CF-Um.Up. University of MinhoCampus de Gualtar 4710-057Braga Portugal Laboratory of p.ysics for m.terials an. Em.rgen. Techn.logies LapMETUniversity of Minho4710-057Braga Portugal Dep.rtm.n. of Surface an. p.asm. Scien.e Faculty of Mathematics and PhysicsCharles UniversityV Holešovičkách 218000Prague 8 Czech Republic n.tion.l In.titute of m.terials p.ysics 105 bis Atomistilor 077125Magurele Romania Dep.rtm.n. of m.terials Scien.e an. m.tallurgy 27 Charles Babbage Rd.Cambridge CB3 OFSUK

Rhom.ohedral p.ase Hf_(x)Zr_(1.x)O_(2)(HZO,x from.0 to 1)film. are p.om.sin. for achievin. robust ferroelectric p.larization.without the n.ed for an.in.tial wake-up.p.e-cyclin.,as is n.rm.lly the case for the m.re com.on.y studied orthorhom.ic ***,a large sp.n.an.ous p.larization.observed in.rhom.ohedral film. is n.t fully un.erstood,an. there are also large discrep.n.ies between.exp.rim.n.al an. theoretical *** this work,in.rhom.ohedral ZrO_(2)thin.film.,we show that oxygen.vacan.ies are n.t on.y a key factor for stabilizin. the p.ase,but they are also a source of ferroelectric p.larization.in.the *** is shown.exp.rim.n.ally through the in.estigation.of the structural p.op.rties,chem.cal com.osition.an. the ferroelectric p.op.rties of the film. before an. after an.an.ealin. at m.derate tem.erature(400℃)in.an.oxygen.en.iron.0}n. to reduce the V_(o)con.en.ration.*** exp.rim.n.al work is sup.orted by den.ity fun.tion.l theory(DFT)calculation. which show that the rhom.ohedral p.ase is the m.st stable on. in.highly oxygen.defective ZrO_(2)*** DFT calculation. also show that V_(o)con.ribute to the ferroelectric *** fin.in.s reveal the im.ortan.e of V_(o)for stabilizin. rhom.ohedral ZrO_(2)thin.film. with sup.rior ferroelectric p.op.rties.

关键词： charged defects ferroelectric p.larization rhom.ohedral p.ase stability zircon.a

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