One-step preparation of copper nanorods with rectangular cross sections.pdf

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1、SolidStateCommunications139(2006)412–414www.elsevier.com/locate/sscOne-steppreparationofcoppernanorodswithrectangularcrosssectionsXiaojunZhang,DongenZhang,XiaominNi,HuaguiZheng∗DepartmentofChemistry,UniversityofScienceandTechnologyofChina,Hefei,Anhui230026,People’sRepublicofChinaReceived

2、22February2006;receivedinrevisedform22June2006;accepted29June2006byV.PellegriniAvailableonline18July2006AbstractCoppernanorodswithrectangularcrosssectionshavebeensuccessfullypreparedinhighyieldviaahydrothermalreductionprocessatalowtemperature.Ascorbicacidactsasboththecomplexingagentandre

3、ducer,soitplaysanimportantroleforthegrowthofnanorods.Thehighlycrystallinefilamentsexhibittheface-centeredcubicstructure,growingmainlyalongthe[110¯]directions.Aninterestingred-shiftwasobservedintheopticalabsorptionmeasurementduetothenanorodswithrectangularcrosssections.XRD,SEM,TEM,electron

4、diffraction,andUV–visiblespectroscopywereusedtocharacterizethesecoppernanorods.c2006ElsevierLtd.Allrightsreserved.PACS:80.07.-b;81.16.Be;68.65.-K;65.80.+nKeywords:B.Chemicalsynthesis;D.Opticalproperties;A.Nanostructures1.IntroductionHerewereportanewmethodofthesynthesisandcharacterization

5、ofsingle-crystalline,well-facetedcopperOne-dimensional(1D)nanostructuresofmetalsareexpectednanorodswithrectangularcrosssections.Thesynthesiswastoplayanimportantroleinfabricatingnanoscaleelectronic,performedusingahydrothermalreductionprocessatalowoptoelectronic,andmagneticdevices[1–3],and

6、theyalsotemperature.provideanidealmodelsystemtoexperimentallyinvestigatephysicalphenomenasuchasquantizedconductanceandsize2.Experimenteffects[4,5].Amongallofthemetals,copper,whichhasAllofthechemicalreagentsusedwereofanalyticalgrade.Inahighelectricalconductivity,hasbeenusedinawideatypical

7、synthesisprocess,0.24gCu(NO3)2and0.2gascorbicvarietyofcommercialapplicationsanditspropertiescanbeacidweremixedwith40mldistilledwater.Afterstirringforenhancedbyprocessingitintovariousnanostructureswith5min,0.5gpoly(vinylpyrrolidone)(PVP)wasaddedintowell-controlleddimension