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采用生长掺杂方式制备出了Cu掺杂ZnSe高效量子点,探索了不同Zn、Se前驱体配比对ZnSe晶核以及ZnSe:Cu量子点质量的影响,并研究了Cu离子掺杂过程中的光谱特征.研究表明,进一步通过在表面掺杂的ZnSe:Cu量子点上同质包覆ZnSe壳层,能够实现其发光效率和稳定性的有效提高;采用配体交换能够实现ZnSe:Cu量子点由油溶性到水溶性的转变.这种新型的掺杂量子点有望替代传统含Cd量子点应用于环境友好型固体发光器件和生物标记.

参考文献

[1] Acharya S,Pradhan N.Insertion/ejection of dopant ions in composition tunable semiconductor nanocrystals.J.Phys.Chem.C,2011,115(40):19513-19519.
[2] Erwin S C,Zu L,Haftel M I,et al.Doping semiconductor nanocrystals.Nature,2005,436 (7047):91-94.
[3] Nag A,Chakraborty S,Sarma D.To dope Mn2+ in a semiconducting nanocrystal.J.Am.Chem.Soc,2008,130(32):10605-10611.
[4] Norris D,Yao N,harnock F,et al.High-quality manganese-doped ZnSe nanocrystals.Nano Lett.,2001,1(1):3-7.
[5] Zheng J J,Yuan X Y,Ikezawa M Y,et al.Efficient photoluminescence of Mn2+ ions in MnS/ZnS Core/Shell quantum dots.J.Phys.Chem.C,2009,113(39):16969-16974.
[6] Zheng J,Ji W,Wang X.et al.Improved photoluminescence of MnS / ZnS core / shell nanocrystals by controlling diffusion of Mn ions into the ZnS shell.J.Phys.Chem.C,2010,114(36):15331-15336.
[7] Xie R G,Peng X G,Synthesis of Cu-doped InP nanocrystals (d-dots) with ZnSe diffusion barrier as efficient and color-tunable NIR emitters.J.Am.Chem.Soc.,2009,131(30):10645-10651.
[8] Pradhan N,Battaglia D M,Liu Y,et al.Efficient,stable,small,and water-soluble doped ZnSe nanocrystal emitters as non-cadmium biomedical labels.Nano Lett.,2007,7(2):312-317.
[9] Sarkar S,Bose R,Jana S,et al.Doped semiconductor nanocrystals and organic dyes:an efficient and greener FRET system.J.Phys.Chem.Lett.,2010,1(3):636-640.
[10] Chen J,Zheng A,Gao Y,et al.Functionalized CdS quantum dots-based luminescence probe for detection of heavy and transition metal ions in aqueous solution.Spectrochim Acta Part A:Mol.Biomol.Spectrosc.,2008,69(3):1044-1052.
[11] Pradhan N,Goorskey D,Thessing J,et al.An alternative of CdSe nanocrystal emitters:pure and tunable impurity enissions in ZnSe nanocrystals.J.Am.Chem.Soc.,2005,127(50):17586-17587.
[12] See Y L,Ming Z H,Huang S W,et al.Local structures around Mn luminescent centers in Mn-doped nanocrystals of ZnS.Phys.Rev.B,1994,50(11):7602-7607.
[13] Nag A,Supra S,Nagarnani C,et al.A study of Mn2+ doping in CdS nanocrystals.Chem.Mater.,2007,19(13):3252-3259.
[14] Pradhaa N,Peng X.Efficient and color-tunable Mn-doped ZnSe nanocrystal emitters:control of optical performance via greener synthetic chemistry.J.Am.Chem.Soc.,2007,129(11):3339-3347.
[15] Chang W L,Wei L,Zhen S M,et al.Posterior rotating rod reduction strategy for h-reducible atlantoaxial subluxations with congenital odontoid aplasia.Spine,2010,35(23):2064-2070.
[16] Li Dan,Liu Junye,Meng Jiwu,et al.The PL decay of Cu2+ doped ZnS nanoparficle.Chin.J.Lumin.1998,19(1):85-88.
[17] Srivastava B B,Jana S,Pradhan N.Doping Cu in semiconductor nanocrystals:some old and some new physical insights.J.Am.Chem.Soc.,2011,133(4):1007-1015.
[18] Quan Z W,Yang D M,Li C X,et al.Multicolor tuning of manganesedoped ZnS colloidal nanocrystals.Langmuir,2009,25(17):1025-1026.
[19] Cue L X,Zhang J H,Ren S L,et al.Luminescence enhancement of core-shell ZnS:Mn/ZnS nanoparticles.Appl.Phys.Lett.,2002,80(23):4300-4302.
[20] Karar N,Chander H,Shivaprasad S M.Enhancement of luminescent properties of ZnS:Mn nanophosphors by controlled ZnO capping.Appl.Phys.Lett.,2004,85(21):5058-5060.
[21] Yang H,Holloway P H.Efficient and photostable ZnS-passivated CdS:Mn luminescent nanocrystals.Adv.Funct.Mater.,2004,14(2):152-156.
[22] Jana S,Srivastava B B,Acharya S,et al.Prevention of photooxidation in blue-green emitting Cu doped ZnSe nanocrystals.Chem.Comm.,2010,46(16):2853-2855.
[23] Lippens P E,Lannoo M.Calculation of the band gap for small CdS and ZnS crystalfites.Phys.Rev.B.,1989,39(15):10935-10942.
[24] Suyver J,Beek,T,Wuister S.et al.Luminescence of nanocrystalline ZnSe:Cu.Appl.Phys.Lett.,2001,79(25):4222-4224.
[25] Bruchez M,Moronne M,Gin,P,et al.Semiconductor nanocrystals as fluorescent biological labels.Science,1998,281(5385):2013-2016.
[26] Zheng J,Gao F,Wei G.et al.Enhanced photoluminescence of watersoluble Mn-doped ZnS quantum dots by thiol ligand exchange.Chem.Phys.Lett.,2012,5(5191520):73-77.
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