近年来,工信随着假冒伪劣产品和信息泄露案件日益增多,产品防伪与信息保护已经成为众多行业密切关注的热点科学问题。 考虑到荧光色彩动态变化的获取途径,部第榜除了在单波长激发下的具有不同寿命的多峰余辉发射途径外,部第榜最简单的方式是材料拥有多模式激发特性,包括光致发光,上转换,余辉,光刺激和机械刺激荧光等。然而,款燃遗憾的是具有双发射峰的无机余辉材料本身就比较少,而且,要实现荧光输出色彩动态变化,还要求两个或多个荧光峰具有不同的荧光寿命。 这里的ZGGO:Cr、料电Yb、料电Er和ZLGO:Mn余辉粉的混合物印花防伪技术具有更高的安全性和稳定性好、无色移等优点,且识别唯一、成本低廉和应用简单等特点,为设计和制备先进的防伪余辉材料提供了新的思路。作为替代方案,池车长余辉发光材料可以在激发停止后发出持续数分钟到数小时甚至数天的发光,池车由于其完全消除了背景荧光而拥有高的信噪比,因此,在防伪应用和信息加密方面特别受到青睐。型上近年来关于动态防伪技术的研究主要是基于上转换和光激励发光实现的。 工信但将长余辉材料应用于动态防伪的研究与报道还很少。近年来,部第榜随着假冒伪劣产品和信息泄露案件日益增多,产品防伪与信息保护已经成为众多行业密切关注的热点科学问题。 然而,款燃在混合余辉荧光粉中实现可变色的动态余辉发射要求两种色彩的余辉荧光粉末(1)具有高的余辉强度和长的余辉寿命。 料电Fig.1 Quintupleluminescencemodes (PL,PersL,PSL,PSPLandUCL) ofZGGO:Cr,Yb,Er phosphors. (a)Calcination temperature-dependentPLexcitationspectramonitoringat701nmandPLemissionspectraunder365nmlightexcitation.(b) PersLdecaycurvesmonitoredat701 nmafterirradiatedbya365 nmUVlampfor5 min.TheinsetshowsthePersLemissionspectrumrecordedat7sdecay.(c)UCLandUCL+PSLspectraofZGGO:Cr,Yb,Er-1300phosphor upon808nm(1W)and980nm(0.7W)laserdiodesirradiation.FortheUCLmeasurements,thesamplewasfresh,whilefortheUCL+PSLmeasurements,thesamplewaspre-irradiatedbya365nmUVlampfor5min.(d) RepeatedPSLandPSPLemissionsignalsofadecayingZGGO:Cr,Yb,Er-1300samplemonitoredat701 nm.Duringthedecay,thesamplewasperiodically(1mininterval)irradiatedbya980nmlaserdiode(at0.7W)for40s.(e)DigitalPL,PersL,UCL+PSLandPSPLimagesofZGGO:Cr,Yb,Er-1300 phosphor underandafter365nm,808nmand980nmirradiation.BeforetheUCL+PSLimaging,thesampleswerepre-irradiatedbya365nmUVlampanddecayedtobeinvisibletothenakedeye.Theimagingparameterismanual/ISO3200/4sFig.2 Schematicillustrationofmulti-modeluminescenceandanti-counterfeitingdesignofredZGGO:Cr,Yb,ErandgreenZLGO:Mnpersistent phosphors.(a)Schematicdiagram;(b)Thevariableemissioncolours,multi-modeluminescence(UCL,PL,PersL,PSLandPSPL),andthedynamicevolutionofthePersLemissionbrightnessandcoloursunderdifferentexcitationconditionsformulti-levelanti-counterfeitingapplications.Fig. 3 Digitalimagesofaquintuple-mode(PL, PersL, UCL,PSLandPSPL modes)‘dragonfly-on-lotuspatternprintedusing ZLGO:Mn-900andZGGO:Cr,Yb,Er-1300phosphors(dragonfly)andZGGO:Cr,Yb,Er-1300phosphor(lotus).(a) Thedesign ofthe‘dragonfly-on-lotus pattern. (b–f)PLandPersLimagesobtainedunderandaftera365nmUVlampirradiation(for5min). (g,h)UCL+PSLandPSPLimagesunderandafteran808nmNIRlaserdiodeirradiation(at0.6W).(i,j) UCL+PSLandPSPLimagesunderandaftera980nmNIRlaserdiodeirradiation(0.6W).(k)UCLimageofafreshpattern(withoutUVpre-irradiation)underan808nmlaserdiodeirradiation(at1W).(l)UCLimageofafreshpatternundera980nmlaserdiodeirradiation(at0.6W). TheUCL+PSLimagingwasconductedafterboththedragonflyandthelotuswereinvisibletothenakedeye.Theimagingparameterismanual/ISO3200/4sfor(b-g,i,k,l)andmanual/ISO3200/15sfor(h,j),respectively.Quintuple-modedynamicanti-counterfeitingusingmulti-modepersistentphosphors.DangliGao,JieGao,FengGao,QingqingKuang,YongPan,YafeiChen,ZhengweiPanFirstpublished:03November2021JournalofMaterialsChemistryC,2021,https://doi.org/10.1039/D1TC04568G。靠包设计同样讲究人体工程学,池车床架的高度、靠背的倾斜度、以及靠包支撑贴合度等方面完美切合人体。 选料精致考究,型上做工精细,辅以流畅的线条,独创清新、柔美、俊朗之格调,将高科技与美学作精彩的演绎,尽展精致悦己生活理念。从配色到功能,工信再到使用场景,颠覆了传统寝具的刻板印象。 艾蒙蕾诗寝具,部第榜带着源于顶奢的时尚印记,将生活与艺术完美融合,令人一眼心动,更令人在生活本真中感受不一样的时尚魅力。空间搭配的艾蒙蕾诗美国健康睡眠系列床垫,款燃以3D科技纤维作为舒适层,款燃全方位呵护脊椎,使人体处于完全放松的状态,为消费者带来健康舒适的睡眠体验。 |
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