简介：ZnOnanowiresdepositedonSisubstrateswerepreparedbythermalevaporationofamixtureofZnOandcarbonpowder.Agionswithanenergyof63keVandadoseof5×1015ions/cm-2wereimplantedintotheas-preparedZnOnanowires.Afterionimplantation,theAg-implantedZnOnanowireswereannealedinairatdifferenttemperaturesfrom600℃to1000℃.Effectsofionimplantationandthermalannealingonthestructuralandphotoluminescent(PL)propertiesoftheZnOnanowireswereinvestigatedbytransmissionelectronmicroscopy(TEM),selectedareaenergydispersiveX-rayspectroscopy(SAEDX),X-raydiffraction(XRD),andfluorescencespectrophotometry.TEM,HR-TEM,andSAEDXanalysesdemonstratedthatefficientdopingofAgwasachievedbyionimplantationandthesubsequentannealingprocess.XRDpatternsrevealedthatthehexagonalwurtzitestructureofZnOnanowireswasmaintainedafterionimplantation.PhotoluminescentemissionsofZnOnanowiresweredecreasedsignificantlybyAgimplantationbutcouldberecoveredbythermalannealing.ThemechanismoftheinfluenceofionimplantationandannealingonthePLintensitywasassessed.

简介：Inthiswork,thelaserinducedplasmaplumecharacteristicsandsurfacemorphologyofPt-andAg-iondepositedsiliconwerestudied.Thedepositedsiliconwasexposedtocumulativelaserpulses.Theplasmaplumeimagesproducedbyeachlasershotwerecapturedthroughacomputercontrolledimagecapturingsystemandanalyzedwithimage-Jsoftware.Theintegratedopticalemissionintensityofbothsamplesshowedanincreasingtrendwithincreasingpulses.Ag-iondepositedsiliconshowedhigheropticalemissionintensityascomparedtoPt-iondepositedsilicon,suggestingthatmoredamageoccurredtothesiliconbyAgions,whichwasconfirmedbySRIM/TRIMsimulations.Thesurfacemorphologiesofbothsampleswereexaminedbyopticalmicroscopeshowingthermal,exfoliationalandhydrodynamicalsputteringprocessesalongwiththere-depositionofthematerial,debrisandheataffectedzones’formation.ThecraterofPt-iondepositedsiliconwasdeeperbuthadlesslateraldamagethanAgiondepositedsilicon.Thenovelresultsclearlyindicatedthattheiondepositedsiliconsurfaceproducedincubationcenters,whichledtomoreabsorptionofincidentlightresultingintoahigheremissionintensityfromtheplasmaplumeanddeepercraterformationascomparedtopuresilicon.Theapproachcanbeeffectivelyutilizedinthelaserinducedbreakdownspectroscopytechnique,whichendurespoorlimitsofdetection.

简介：Thecomplexnatureoflaser-materialinteractioncausesnon-stoichiometricablationofalloysamples.Thisisattributedtomatrixeffect,whichreducesanalyzingcapability.Toaddressthisissue,theanalyticalperformanceofthreedifferentnormalizationmethods,namelynormalizationwithbackground,internalnormalizationandthreepointsmoothingtechniquesatdifferentparametersettingsisstudiedforquantificationofAgandZnbyLaserinducedbreakdownspectroscopy(LIBS).TheLIBSspectraoffiveknownconcentrationofsilverzincbinarycompositeshavebeeninvestigatedatvariouslaserirradiances(LIs).CalibrationcurvesforbothAg(I)line(4d^105s^2S1/2→4d^105p^2P1/2at338.28nm)andZn(I)line(4s5s^3S1→4s4p^3P2at481.053nm)havebeendeterminedatLIof5.86×10^10Wcm^-2.SlopesofthesecalibrationcurvesprovidethevaluationofmatrixeffectintheAg–Zncomposites.Withcarefulsamplepreparationandnormalizationaftersmoothingatoptimumparametersetting(OPS),theminimizationofsamplematrixeffecthasbeensuccessfullyachieved.AgoodlinearityhasbeenobtainedinAgandZncalibrationcurveatOPSwhennormalizedthewholeareaofspectrumaftersmoothingandtheobtainedcoefficientsofdeterminationvalueswereR^2=0.995and0.998closerto1.Theresultsofmatrixeffecthavebeenfurtherverifiedbyanalysisofplasmaparameters.BothplasmaparametersshowednochangewithvaryingconcentrationatOPS.However,athighconcentrationofAg,theobservedsignificantchangesinbothplasmaparametersatcommonparametersettingPS-1andPS-2werethegestureofmatrixeffect.Inourcase,thebetteranalyticalresultswereobtainedatsmoothingfunctionwithoptimizedparametersettingthatindicatesitismoreefficientthannormalizationwithbackgroundandinternalnormalizationmethod.