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1、Carbon95(2015)910e918ContentslistsavailableatScienceDirectCarbonjournalhomepage:www.elsevier.com/locate/carbonStructureandelectromagneticpropertiesofbothregularanddefectiveonion-likecarbonnanoparticlesaa,*aabbLinwenJiang,ZhenhuaWang,DianyuGeng,YangmingLin,YuWang,JingAn,baaaJunHe,DaLi,
2、WeiLiu,ZhidongZhangaShenyangNationalLaboratoryforMaterialsScience,InstituteofMetalResearchandInternationalCenterforMaterialsPhysics,ChineseAcademyofSciences,Shenyang110016,PRChinabDivisionofFunctionalMaterialResearch,CentralIron&SteelResearchInstitute,Beijing100081,PRChinaarticleinfoa
3、bstractArticlehistory:Bothregularanddefectiveonion-likecarbon(OLC)nanoparticleswerepreparedbythearc-dischargeReceived23July2015processusinghexane(C6H14)andethanol(C2H5OH)ascarbonsources.TheformationofdefectiveReceivedinrevisedformsitesinOLCnanoparticlesisascribedtotheintroductionofoxy
4、genofethanol.Itisshownthathigh31August2015vacuumorusingrawmaterialswithoutoxygenisfavorabletoformregularonion-likemicrostructure.Accepted4September2015FordefectiveOLC/paraffincomposites,thevaluablemicrowave-absorptionareas(<10dB)increasewithAvailableonline9September2015theweightfracti
5、onincreasingfrom20%to50%.Thefurtherincreasingofconcentration(60%)willdecreasegreatlythemicrowaveabsorptionduetothestrongreflectionofincidentmicrowaveinducedbythehighconductivityofsystem.Thereflectionloss(RL)exceeding10dBcanbeobtainedfor50%defectiveOLC/paraffincompositesinthethicknessran
6、geof1.4e3.4mm.Thelargeamountsofdefectivesitesareresponsiblefortheexcellentmicrowave-absorptionperformancesofdefectiveOLC/paraffincomposites.©2015ElsevierLtd.Allrightsreserved.1.Introductionnanocapsules,thecontributorsformicrowaveabsorptionmayincludeouterCshell,innermetalcoreandtheshell
7、ecoreinterface.Inrecentyears,withtheincreasedneedformicrowaveab-Amongthese,theCshellwasbelievedtobeasignificantfactorforsorbersandradar-absorbingmaterialsinapplications(reductionofmicrowaveabsorption[9,11].Zhangetal.reportedthedefectsitesradarsignatureofobjects,reductionofelectromagnet
8、icint
