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简介：Thisresearchreportsthepreparationandcharacterizationofcoppernanoparticlesmodifiedbydidecylbenzenesulfonate(DBS),TheCunanoparticles'sizewasdeterminedtobe40nmbytransmissionelectronmicroscope(TEM).TheX-rayphotoelectronspectrometry(XPS)resultsshowthatthereareinteractionsbetweenthecoppernanoparticlesandDBSfunctiongroup.Thenonlinearopticalpropertieswerestudiedbythefour-wavemixingmethod.Thevalueofx^(3)/α0wasfoundtobe6.9×10^-11esucm.

简介：Noveltetranuclearcoppercomplexes,Cu4(OH)2(ClO4)3(HA).H2O(1)andCu4(ClO4)5(H3B).3H2O(2),weresynthesizedbyreacting1,5-bis(1'-phenyl-3'-methyl-5'-pyrazolone-4')-1,5--pentanedionewith1,3-propanediamineand2-hydroxyl-1,3-propanediamineinthepresenceofatemplatereagentcopperion,New[2+2]typeopencyclicmultidentateligandsarealsoobtainedfromthereaction(H4A)andH6Bstandfornewcompoundsfrom1,3-propanediamineand2-hydroxyl-1,3-propanediamine,respectively),TheyeachcontainfiveC=O,threeC=NandoneNH2group[s,Thecomplexeswerecharacterizedbyelementalanalyses,conductivity,FR-i.r.electronicspectraandextendedX-rayabsorptionfinestructure(EXAFS),Copperionsin(1)arebasicallyfourcoordinatewithtetragonalgeometry.TheaveragecoordinationbonddistancesofCu-NandCu-Oare1.91Aand2.05A.In(2).copperionsareprimarilyfivecoordinatewithsquare-basedpyramidalgeometry.TheaveragecoordinationbonddistancesofCu-NandCu-Oare1.93Aand2.08A.Fourcopperatomsinmoleculesmaybearrangedtetragonally.Boththeligandfieldandthecoordinationbondsincomplex(1)arestrongerthanthosein(2).Investigationsonvariabletemperaturesusceptibilitiesshowthatsomeantiferromagneticexchangeinteractionexistinthecomplexes,Theplotsofx-1versusTobeytheCurie-Weisslawonlyatlowtemperature.Preliminaryresultsofabioassayindicatethatthetwocomplexeshavesomeantitumouractivityinvitro.

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简介：AsinteredTi_(13)Cu_(87)targetwassputteredbyreactivedirectcurrent(DC)magnetronsputteringwithagasmixtureofargon/nitrogenfordifferentsputteringpowers.Titanium-copper-nitrogenthinfilmsweredepositedonSi(111),glassslideandpotassiumbromide(KBr)substrates.Phaseanalysisandstructuralpropertiesoftitanium-copper-nitrogenthinfilmswerestudiedbyX-raydiffraction(XRD).ThechemicalbondingwascharacterizedbyFouriertransforminfrared(FTIR)spectroscopy.TheresultsfromXRDshowthattheobservedphasesarenano-crystallitecubicantirheniumoxide(antiReO_3)structuresoftitaniumdopedCu_3N(Ti:Cu_3N)andnanocrystallitefacecenteredcubic(fcc)structuresofcopper.ScanningelectronmicroscopyandenergydispersiveX-rayspectroscopy(SEM/EDX)wereusedtodeterminethefilmmorphologyandatomictitanium/copperratio,respectively.Thefilmspossesscontinuousandagglomeratedstructurewithanatomictitanium/copperratio(～0.07)belowthatoftheoriginaltarget(～0.15).Thetransmittancespectraofthecompositefilmsweremeasuredintherangeof360nmto1100nm.Filmthickness,refractiveindexandextinctioncoefficientwereextractedfromthemeasuredtransmittanceusingareverseengineeringmethod.Inthevisiblerange,thehigherabsorptioncoefficientofthefilmspreparedatlowersputteringpowerindicatesmorenitrificationincomparisontothosepreparedathighersputteringpower.ThisisconsistentwiththeformationoflargerTi:Cu_3Ncrystallitesatlowersputteringpower.Thedepositionratevs.sputteringpowershowsanabrupttransitionfrommetallicmodetopoisonedmode.Acomplicatedbehaviorofthefilms'resistivityuponsputteringpowerisshown.