以两性齐聚物(聚马米酸十六醇酯,PMAH)为修饰剂,利用相转移的方法将油溶性的CdSe/ZnS量子点转移至水中,制备出高量子产率、高稳定性的水溶性CdSe/ZnS荧光量子点.随后将PMAH修饰的水溶性量子点分散到聚丙烯酸(PAA)乳液中,采用旋转涂膜的方法制备了透明的聚合物-CdSe/ZnS量子点复合薄膜,在紫外灯的照射下薄膜发出明亮的红色光.利用XPS对复合薄膜的表面结构进行了表征.随后对膜的光致发光性能和薄膜在黑暗的环境中对紫外光的耐受性进行了系统的研究,发现复合薄膜的荧光强度随着薄膜厚度和薄膜中纳米品浓度的增加而线件增强,薄膜在紫外光照射800 h后仍然保持了很高的荧光强度,量子产率仅仅损失了5%.
参考文献
| [1] | Bruchez M,Moronne M,Gin P,et al.Semiconductor nanocrystals as fluorescent biological labels.Science,1998,281(5385):2013-2016. |
| [2] | Chan W C,Nie S.Quantum dot bioconjugntes for ultrasonsitive nonisotopic detection.Science,1998,281(5385):2016-2018. |
| [3] | Algar W R,Krull U J.Luminescence and stability of aqueous thioalkyl acid capped CdSe/ZnS quantum dots correlated tofigand ionization.Chem.Phys.Chem.,2007,8(4):561-568. |
| [4] | Han M,Gao X,Su J Z,et al.Quantum-dot-tagged microbeads for multiplexed optical coding of biomolecales.Nat.Biotechnol.,2001,19(7):631-635. |
| [5] | Michalet X,Pinaud F E,Bentolila L A,et al.Quantum dots for live cells,in vivo imaging,and diagnostics.Science,2005,307(5709):538-544. |
| [6] | Medintz I L,Uyeda H T,Goldman E R,et al.Quantum dot bioconjugates for imaging,labelling and sensing.Nat.Mater.,2005,4(6):435-446. |
| [7] | Decher G.Fuzzy Nanoassemblies:toward layered polymeric multicomposites.Science,1997,277(5330):1232-1237. |
| [8] | Clark S L,Hammond P T.Engineering the microfabrication of layer-by-layer thin films.Adv.Mater.,1998,10(18):1515-1519. |
| [9] | Sun J,Hao E,San Y,et al.Multilayer assemblies of colloidal ZnS doped with silver and polyeletrolytes based on electrostatic interaction.Thin solid films,1998,327-329:528-531. |
| [10] | Kotov N A,Dekany I,Fendler J H.Layer-by-layer self-assembly of polyelectrolyte-semiconductor nanoparticle composite films.J.Phys.Chem.,1995,99(35):13065-13069. |
| [11] | 刘明贤,孙颖,甘礼华,等(LIU Ming-Xian,et al.静电自组装制备CdTe量子点薄膜.无机材料学报(Journal of Inorganic Materials),2008,23(3):557-561. |
| [12] | 凌剑,丛日敏(LING Jian,et al).以CdS.ZnS核一壳量子点,聚酰胺一胺(PAMAM)树形分子纳米复合材料自组装制备发光超薄膜.化学学报(Acta Chim.Sinica),2008,66(18):2070-2074. |
| [13] | Wang J Y,Chen W,Liu A H et al.Controlled fabrication of cross-linked nanoparticles/polymer composite thin films through the combined use of surface-initiated atom transfer radical polymerization and gas/solid reaction.J.Am.Chem.Soc.,2002,124(45):13358-13359. |
| [14] | Zhang H,Cui Z C,Wang Y,et al.From water-soluble CdTe nanoerystals to fluorescent nanocrystal-polymer transparent composites using polymerizable surfactants.Adv.Mater.,2003,15(10):777-780. |
| [15] | Shen H B,Wang H Z,Tang Z J,et al.High quality synthesis of monodisperse zinc-blende CdSe and CdSe/Zns nanocrystals with a phosphine-free method.Cryst.Eng.Comm.,2009(11):1733-1738. |
| [16] | 李林松,周长华,申怀彬,等.一种水溶性纳米晶的制备方法.中国专利,发明专利,200810049951.2008.12.10. |
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