简介:采用溶肢-凝肢法提拉镀膜制备Sn掺杂ZnO薄膜,研究了空气退火、高真空退火(10-2Pa)、低真空退火(1Pa)和循环退火四种条件下Sn掺杂浓度对SZO薄膜光电性能的影响.结果表明:四种退火条件下不同Sn掺杂浓度时制备的SZO薄膜均为纤锌矿结构且具有C轴择优取向生长特性,当Sn掺杂浓度为5at.%时SZO薄膜的结晶生长最好.高真空退火条件下Sn掺杂浓度为3at.%时,电学性能最优,其电阻率可达到5.4×10^-2Ω·cm.当Sn掺杂浓度小于3at.%时,薄膜的可见光区平均透过率均大于85%,当掺杂浓度高于3at.%时,薄膜的透过率随着掺杂浓度的增大而降低.
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简介:因为他们联合了木头和无机的混合物的优点,混合木头材料吸引了可观的注意。这个工作调查了微结构形态学,热稳定性,紫外(紫外)用wood/ZnO混血儿材料做通过的composites的稳定性,和抗菌剂性质一灵巧在原处化学合成方法。X光检查衍射(XRD)和thermogravimetric分析(TGA)结果显示综合ZnO粒子有大约10.8nm的一种平均谷物尺寸。扫描电子显微镜学(SEM)观察证明与nanosheets自我装配的ZnOnanoflowers在木头房间腔被介绍并且与增加Zn2+集中增加了。ZnOnanoparticles也在木头房间墙中被产生,它被精力散的光谱学(版本)的结果证实。TGA测试也显示wood/ZnO混血儿材料的热稳定性在ZnO无机的粒子的形成以后被改进。最后,抗菌剂功效测试的结果和紫外抵抗测试表明ZnOnanoparticles对Escherichiacoli作为抗菌剂代理人显示出有希望的未来(E。coli)并且为木头保护的紫外抵抗代理人。
简介:Theroleofreducedgrapheneoxide(rGO)intheenhancementofphoto-conversionefficiencyofZnOfilmsforphotoelectrochemical(PEC)water-splittingapplicationswasanalyzed.ZnOandrGO-hybridizedZnO(rGO/ZnO)filmswerepreparedviaatwo-stepelectrochemicaldepositionmethodfollowedbyannealingat300°Cunderargongasflow.Thephysical,opticalandelectrochemicalpropertiesofthefilmswerecharacterizedtoidentifytheeffectofrGO-hybridizationontheappliedbiasphoton-to-currentefficiency(ABPE)ofZnO.ScanningelectronmicroscopyandX-raydiffractionindicatedtheformationofverticallyaligned,wurtzite-phaseZnOnanorods.Diffuse-reflectanceUV–visiblespectroscopyindicatedthatrGO-hybridizationwasabletoincreasethelightabsorptionrangeoftherGO/ZnOfilm.UPSanalysisshowedthathybridizationwithrGOincreasedthebandgapofZnO(3.56eV)to3.63eVforrGO/ZnOsample,whichmaybeattributedtotheBurstein–Mosseffect.Photoluminescence(PL)spectradisclosedthatrGOhybridizationsuppressedelectron-holerecombinationduetocrystaldefects.Linearsweepvoltammetryofthepreparedthinfilmsshowedphotocurrentdensityof1.0and1.8mA/cm~2forZnOandrGO/ZnOat+0.7V,whichcorrespondedtoanABPEof0.55%and0.95%,respectively.Thus,thisreporthighlightedthemulti-facetedroleofrGO-hybridizationintheenhancementofZnOphoto-conversionefficiency.
简介:有在水里推迟的10,50,100,和200nm的四条不同粒子直径的ZnOnanospheres的散布性质被调查理论并且试验性地在里面光谱全部可见范围的范围和在红外线附近的区域的部分。在水里推迟的ZnOnanospheres的散布性质被采用三个主要参数描述:散布紧张的尖分发我,散布扑灭系数敲打声,和散布的生气的节敲打声。结果在某个波长显示那(i),因为当粒子直径从10~200nm增加时,一个显然前面繁殖的特征,和前面散布的紧张逐渐地是主导的,散布紧张的尖分发出现,并且(ii)散布扑灭系数和生气的节能被使用一件纯水样品和一件给定的ZnO样品的测量发射度变化决定;他们都被显示依赖于粒子尺寸和事件波长。四件不同散布样品的试验性的结果在给定的波长范围以内与理论预言同意很好。
简介:Poroussiliconpillararray(PSPA)sampleswhichareidealsubstantialmaterialswithdominantelectronicandluminescencepropertieswerepreparedbysurfaceetchingmethod.ZnOnanorodswithorwithoutMndopinggrownuniformlyandalignedontoPSPAregardlessoflatticematchingshowvariousphotoluminescence(PL)properties.ThedopedMnionsinZnOnanorodsweredirectlyobservedbyX-rayphotoelectronspectroscopy(XPS),andZnOstructuresweredetectedbyX-raydiffraction(XRD).Asthedopingconcentrationincreases,XRDpeaksofZnOnanorodsshifttolowangle.TheinfluencesofdopingMnionsonluminescencepropertiesofZnOnanorodswereinvestigated.Exceptfortheultraviolet(UV)PLband,thebroadPLbandisobservedatvisibleregion.Thebandcouldbedividedintothreeseparatebands(orange,greenandred)byLorentziandeconvolution.TheintensityoforangePLbandfirstlyincreasesthendecreases,andthengetsthemaximumatthedopingMn-to-Znmolarratioof2.0:100.0whichisthemosteffectivedopingconcentration.ThegreenPLbandisattributedtozincvacancyofZnO,theorangePLbandtoMnionsrecombinationofitself,andtheredPLbandtooxygenvacancyofZnO,respectively.AstheMn-dopedZnOnanorodscouldemityellowgreenluminescenceexcitedbyUVradiation,anddopedMnionscouldimprovethecolorrenderingindexoftheluminescence,thenanorodscouldbeusedaspromisingwhite-lightemittersinthefuture.
简介:摘要目的观察甲状腺手术后使用水胶体薄膜对伤口愈合及对疤痕形成的干预临床效果。方法选择甲状腺手术患者60例,分为对照组30例和治疗组(A、B二组)30例,治疗组(A组)采用水胶体薄膜进行换药,将10cm×10cm水胶体薄膜对折后剪开,直接粘贴在伤口上,2—3天更换.对照组(B组)采用常规无菌纱布换药方法。结果治疗A组在使用水胶体薄膜伤口愈合时平均创口愈合天数、疼痛改善例数、疤痕愈合范围、均优于对照组,两者比较有统计学意义(P<0.01)。对照B组在伤口愈合和病人舒适程度上均低于对照组,两者比较有统计学意义(P<0.05)结论水胶体薄膜对促进甲状腺手术后伤口愈合及减少疤痕形成的临床效果显著。