简介:运用转移矩阵的技巧,本文给出了戴帽B27N27硼-氮zlgzag纳米管的克库勒结构数的计算公式.在实际计算中,根据管的对称性,转移矩阵的阶得到了显著地降低.
简介:Inthepresentwork,theLEDchipwasirradiatedbyusing59.6MeVNionsinaterminalchamberoftheSector-focusedcyclotron(SFC)intheNationalLabortaryofHeavy-ionAcceleratorsinLanzhou.The63MeVNionspenetratedthroughagoldfoilandscatteredinalargearea.Theenergyofionwasreducedto59.6MeVafterscatteringofthegoldfoil.TheLEDwasprovidedbytheSemiconductorLightingCenterinInstituteofSemiconductorinBeijing.TheluminencesoftheLEDbefore/afterirradiationweretestedthroughaintegratingsphereinSemiconductorLightingCenterinInstituteofSemiconductorinBeijing.Theluminancewastestedunderacurrentof350mA.Fig.1showstherelationshipbetweentheluminencesandtheirradiationfluences.Theirradiationledto
简介:Solidstatenanoporesornanochannelspreparedinpolymer[1;2]andsemiconductorfilms[3]haveshowninterestingtransportphenomena,becauseoftheirdiametersatthenanoscaleandpositiveornegativechargesontheirwalls.Grapheneisanidealmaterialfordevelopingsolidstatenanoporesnotonlyduetoitsatomicscalethickness,highmechanicalstrengthandchemicalstabilitiesbutalsobecauseoftheimpermeabilityofthepristinesinglelayergraphenetoallatomsandmoleculesexceptprotons[4].AsthesingleGraphene/PET(G/PET)nanoporeistheelementarybuildingblockfornanoporousmembrane,theunderstandingandcontrolofitsindividualionictransportpropertiesarealsocrucialinproteinseparation,waterdesalination,andbio-moleculedetectionusingarraysofidenticalnanopores.Here,thesingleG/PETnanoporewassuccessfullypreparedbyusingionirradiationtechnologyandasymmetricetchingmethod[5]andthecorrespondingionictransportpropertieswereinvestigatedindetail.
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简介:AngulardistributionsoffragmentsB,C,N,O,F,Ne,Na,MgandAlinducedbythecollisionof^19F+^27Alat114MeVhavebeenmeasured.Angulardispersionparametersareextractedfromtheexperimentaldataandcomparedwiththetheoreticalones.ThedynamicdispersionsfordissipativeproductsdependstronglyonthechargenumberZofthefragments.
简介:TheinteractionprocessofionsandplasmasisanimportanttopicinIon-Beam-DrivenHighEnergyDensityPhysicsandInertialConfinementFusionresearch.Duetothestrongnon-lineareffectsandthespecialimportanceinICFresearch,moreandmoreemphasishasbeengiventotheinvestigationsforionbeaminlowenergyrangeand/orforplasmawithhighintensity[1;2].Here,weaddressthenewlymeasuredresultsoftheenergylossbyslowionspenetratingthefullyionizedhydrogenplasmatarget.
简介:Inthepaper,thenonlinearmagnetoelasticpropertiesofcompositionTb0.27Dy0.73Fe1.95<110>orientedpolycrystallinealloysareinvestigatedundercoupledloadsofhighmagneticfieldandcompressivestress.Themagnetizationandmagnetostrictionaremeasuredsimultaneouslyunderappliedmagneticfieldfrom800to800kA/mandcompressivestressfrom0to25MPaatroomtemperature.Thestraincoefcientandrelativepermeabilityareobtainedbydiferentialcalculationfromtheexperimentalcurves.Theresultsshowthatthevaluesofsaturationmagnetization(Ms)underdiferentcompressivestressesremaininvariablyconstantintheregionofthehighmagneticfield.Thesaturationmagnetostriction(λs)increaseswithincreasingcompressivestressandreaches1680×106under25MPa.Accordingtotheincreaseofthecompressivestress,thehystereticloopareaofmagnetizationandmagnetostrictionincreases,whilethemaximumrelativepermeabilityandstraincoefcientdecrease.Additionally,theinfluenceofthebiasmagneticfieldonthemechanicalpropertyistakenintoaccount.Thestress-strainrelationshipisnonlinearandsensitivetotheappliedexternalmagneticfieldsalongtheaxisofrod.Theresultsobtainedareausefulcomplementtotheexistingexperimentsfortheoreticalapproachesandengineeringapplications.