期刊文献+

ZnS:Co^(2+)半导体纳米晶的制备及性能研究

Preparation and Characterization of ZnS∶Co^(2+) Semiconductor Nanocrystals
下载PDF
导出
摘要 ZnS∶Co2+ nanocrystals were prepared in aqueous solution by both one-step and two-step methods.The surface of the prepared ZnS∶Co2+ nanocrystals was modified by mercaptoacetic acid(TGA).The UV-vis absorption spectroscopy was employed as a direct probe to detect the location of Co2+ dopant in ZnS∶Co nanocrystals.The transition of Co2+4T1g(F)→4T1g(P)was observed from the ZnS∶Co2+ nanocrystals derived by the one-step sample,and the Co2+ 4A2(F)→4T1(P)transition was detected from the ZnS∶Co2+ nanocrystals derived by the two-step sample.The results indicate that Co2+ existed on the surface instead of in the lattice of ZnS nanocrystals derived by the one-step method.And for those ZnS∶Co2+ nanocrystals by using the two-step method,Co2+ were co-precipitated in the lattice of ZnS nanocrystals.And additionally,the band gap of the lattice co-precipitated doped ZnS∶Co2+ nanocrystals was narrower than the pure ZnS samples. ZnS∶Co2+ nanocrystals were prepared in aqueous solution by both one-step and two-step methods.The surface of the prepared ZnS∶Co2+ nanocrystals was modified by mercaptoacetic acid(TGA).The UV-vis absorption spectroscopy was employed as a direct probe to detect the location of Co2+ dopant in ZnS∶Co nanocrystals.The transition of Co2+4T1g(F)→4T1g(P)was observed from the ZnS∶Co2+ nanocrystals derived by the one-step sample,and the Co2+ 4A2(F)→4T1(P)transition was detected from the ZnS∶Co2+ nanocrystals derived by the two-step sample.The results indicate that Co2+ existed on the surface instead of in the lattice of ZnS nanocrystals derived by the one-step method.And for those ZnS∶Co2+ nanocrystals by using the two-step method,Co2+ were co-precipitated in the lattice of ZnS nanocrystals.And additionally,the band gap of the lattice co-precipitated doped ZnS∶Co2+ nanocrystals was narrower than the pure ZnS samples.
出处 《化学研究与应用》 CAS CSCD 北大核心 2010年第5期605-608,共4页 Chemical Research and Application
基金 国家自然科学基金委员会(No.u0837605) 教育部"新世纪优秀人才支持计划"(No.NCET-07-0590) 四川省应用基础研究(No.2008JY0039)资助
关键词 ZnS:Co2+ 巯基乙酸 紫外-可见吸收光谱 ZnS∶Co2+ mercaptoacetic acid UV-vis absorption spectroscopy
  • 相关文献

参考文献12

  • 1Ding S Y,Jones M,Tucker M P,et al.Quantum dot molecules assembled with genetically engineered proteins[J].Nano Letters,2003,3(11):1581-1585.
  • 2王占国.半导体量子点激光器研究进展[J].物理,2000,29(11):643-648. 被引量:14
  • 3Colvin V L,Schlamp M C,Alivisatos A P.Light emitting diodes cadmium selenide nanocrystals and a semiconducting polymer[J].Nature,1994,370(6488):354-357.
  • 4Bhargava R N,Gallagher D,Hong X,et al.Optical properties of manganese-doped nanocrystals of ZnS[J].Physical Reviews Letters,1994,72(3):416-419.
  • 5Murase N,Jagannathan R,Kanematsu Y,et al.Fluorescence and EPR characteristics of Mn2+-doped ZnS nanocrystals prepared by aqueous colloidal method[J].The Journal of Physical Chemistry B,1999,103(5):754-760.
  • 6Yang P,Lü M,Xü D,et al.The effect of Co2+ and Co3+ on photoluminescence characteristics of ZnS nanocrystallines[J].Journal of Physics and Chemistry of Solids,2001,62(6):1181-1184.
  • 7Karar N,Singh F,Mehta B R Structure and photoluminescence studies on ZnS:Mn nanoparticles[J].Journal of Applied Physics,2004,95(2):656-660.
  • 8Yang H,Holloway P H,Cunningham G,et al.CdS:Mn nanocrystals passivated by ZnS:Synthesis and luminescent properties[J].The Journal of Chemical Physics,2004,121(20):10233-10240.
  • 9Nick S,Norberg,Gregory L,et al.Giant excitonic zeeman splittings in colloidal Co2+-doped ZnSe quantum dots[J].Journal of the Ameican Chemical Society,2006,128(40):13195-13203.
  • 10Ghosh P K,Jana S,Nandy S,et al.Size-dependent optical and dielectric properties of nanocrystalline ZnS thin films synthesized via rf-magnetron sputtering technique[J].Materials Research Bulletin,2007,42(3):505-514.

二级参考文献11

  • 1王占国.第四届全国MBE会议文集[M].江苏无锡,1997,9..
  • 2Liu G T,Electron Lett,1999年,35卷,1163页
  • 3Wang Z G,Hosted by TMS,1998年,2097页
  • 4王占国,第四届全国MBE会议文集,1997年
  • 5Alvarez G, Mayr M, Dagotto E. Phase Diagram of a Model for Diluted Magnetic Semiconductors Beyond Mean- Field Approximations [ J ]. Phys Rev Lett. ,2002,89 ( 1 - 4) : 277202.
  • 6Eric Yang S R, Jairo Sinova, Jungwirth T, et al. Non - Drude Optical Conductivity of (Ⅲ,Mn) V Ferromagnetic Semiconductors [ J ]. Phys Rev B, 2003,67 : ( 1 - 7 ) : 045205.
  • 7Maca F, Masek J. Electronic States in Ga1-x Mnx As :Substitutional Versus Interstitial Position of Mn [ J ]. Phys Rev B, 2002,65 ( 1 - 6) : 235209.
  • 8Kresse G, Furthmuller J. Efficient hemtive Schemes for ab Initio Total - energy Calculations Using a Plane - wave Basis Set[J]. Phys Rev B,1996,54(16):11 169-11 186.
  • 9McMurdie H F,Morris M C, Evans EH, et al. Standard X -ray Diffraction Powder Patterns From the JCPDS Research Associateship [ J ]. Powder Diffraction, 1986, 4 ( 1 ) :334 -345,341.
  • 10Yeh C Y, Lu Z W, Froyen S, et al. The Zincblende - wurtzite Polytypism in Semiconductors [ J ]. Phys Rev B, 1992,46 : 10 086 - 10 097.

共引文献16

相关作者

内容加载中请稍等...

相关机构

内容加载中请稍等...

相关主题

内容加载中请稍等...

浏览历史

内容加载中请稍等...
;
使用帮助 返回顶部