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1、ARTICLEINPRESSJournalofCrystalGrowth299(2007)158–164www.elsevier.com/locate/jcrysgroAfaciletemplateless,surfactantlesshydrothermalroutetoultralongcoppersubmicronwiresWeiWang,GuicunLi,ZhikunZhangKeyLaboratoryofNanostructuredMaterials,QingdaoUniversityofScien
2、ce&Technology,Qingdao266042,People’sRepublicofChinaReceived29July2006;receivedinrevisedform26November2006;accepted27November2006CommunicatedbyK.NakajimaAvailableonline23January2007AbstractUltralongcoppersubmicronwireshasbeenfabricatedbyafacilehydrothermalrou
3、teundertemplatelessandsurfactantlessconditions.VitaminCservedasboththereductantandcappingagentthatcandirectthegrowthofcoppersubmicronwires.Thecrystallinity,purity,morphology,andstructurefeaturesofcoppersubmicronwireswereinvestigatedbypowderX-raydiffraction(X
4、RD),scanningelectronmicroscopy(SEM),transmissionelectronmicroscopyandselectedareaelectrondiffraction(TEM/SAED).Thegrowthmechanismofthecoppersubmicronwireswasstudiedindetail.r2007PublishedbyElsevierB.V.Keywords:A1.Low-dimensionalstructures;A1.Nanostructures;A
5、2.Hydrothermalcrystalgrowth;B1.Metals;B1.Nanomaterials1.Introductionface-centeredcubic(fcc)Cunanorodsandnanowiresaremainlyfabricatedbythetemplate-directedmethods[5–10]One-dimensional(1D)nanomaterials(rods/belts/wires/yetthenecessaryremovaloftemplateisoftendi
6、f?cultandcables)havebeenasubjectofintensiveresearchinrecentmaycausedamagetothenanowireproduct[11,12].Moreyearsowingtotheiruniquemagnetic,optical,electricalandrecently,severalgroupshavesuccessfullyachievedCucatalyticproperties[1,2].Theyareexpectedtoplayannano
7、wiresbysolution-phaseroutes,whereasmostofthemimportantroleasbothinterconnectsandfunctionalunitsaresofttemplateorsurfactant-basedmethodsthatinfabricatingelectronic,optoelectronic,electrochemicaltypicallyrelyonusinglow-dimensionalDNAorpolymerandelectromechanic
8、aldeviceswithnanoscaledimensions.templates[13]orvarioussurfactants[14,15].However,Theabilitytoobtain1Dnanomaterialsmeansmuchtosomeofthetemplateorsurfactantusedforthegrowthofmodernscienceandtechn
