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Effect of chemical composition on luminescence of thiol-stabilized CdTe nanocrystals


Judicious selection of the amount of surfactant during synthesis enables a drastic increase in the photoluminescence efficiency of aqueous CdTe nanocrystals (NCs) stabilized by thioglycolic acid (TGA). Elemental determination of the NCs was undertaken to identify the origin of this effect. The molar ratio of (Te + S) to Cd approached unity when the optimum amount of TGA was used during synthesis, whereas the number of S atoms originating from TGA molecules in one NC (2.6 nm of diameter) remained unchanged at 90 ± 3. This indicates that the core lattice composition at the beginning of synthesis, rather than the surface conditions, affects the photoluminescence efficiency of the NCs even after prolonged refluxing.



  1. A.L. Rogach, L. Katsikas, A. Kornowski, D. Su, A. Eychmu¨ler, H. Weller, B. Bunsen-Ges, Phys. Chem. 100, 1772 (1996)

    Google Scholar 

  2. Dabbousi BO, Rodriguez-Viejo J, Mikulec FV, Heine JR, Mattoussi H, Ober R, Jensen KF, Bawendi MG: J. Phys. Chem. B. 1997, 101: 9463. COI number [1:CAS:528:DyaK2sXmvVamtr0%3D] 10.1021/jp971091y

    Article  Google Scholar 

  3. Li CL, Murase N: Chem. Lett.. 2005, 34: 92. COI number [1:CAS:528:DC%2BD2MXmtlCnsA%3D%3D] 10.1246/cl.2005.92

    Article  Google Scholar 

  4. Guo J, Yang W, Wang C: J. Phys. Chem. B. 2005, 109: 17467. COI number [1:CAS:528:DC%2BD2MXptVCms7c%3D] 10.1021/jp044770z

    Article  Google Scholar 

  5. Murase N, Gao MY: Mater. Lett.. 2004, 58: 3898. COI number [1:CAS:528:DC%2BD2cXptFOmsb8%3D] 10.1016/j.matlet.2004.03.055

    Article  Google Scholar 

  6. Shavel A, Gaponik N, Eychmüller A: J. P. Chem. B. 2006, 110: 19280. COI number [1:CAS:528:DC%2BD28Xptleksb8%3D] 10.1021/jp063351u

    Article  Google Scholar 

  7. Kasuya A, Sivamohan R, Barnakov YA, Dmitruk IM, Nirasawa T, Romanyuk VR, Kumar V, Mamykin SV, Tohji K, Jeyadevan B, Shinoda K, Kudo T, Terasaki O, Liu Z, Belosludov R V, Sundararajan V, Kawazoe Y: Nat. Mater.. 2004, 3: 99. ; COI number [1:CAS:528:DC%2BD2cXoslWqtg%3D%3D]; Bibcode number [2004NatMa...3...99K] 10.1038/nmat1056

    Article  Google Scholar 

  8. Jose R, Zhanpeisov. NU, Fukumura H, Baba Y, Ishikawa M: J. Am. Chem. Soc.. 2005, 128: 629. COI number [1:CAS:528:DC%2BD2MXhtlant7zF] 10.1021/ja0565018

    Article  Google Scholar 

  9. Talapin DV, Rogach AL, Haase M, Weller H: J. Phys Chem. B. 2001, 105: 12278. COI number [1:CAS:528:DC%2BD3MXot1yksr8%3D] 10.1021/jp012229m

    Article  Google Scholar 

  10. Talapin DV, Rogach AL, Shevchenko EV, Kornowski A, Haase M, Weller H: J. Am. Chem. Soc. 2002, 124: 5782. COI number [1:CAS:528:DC%2BD38XjtF2hurc%3D] 10.1021/ja0123599

    Article  Google Scholar 

  11. H. Zhang, Z. Zhou, B. Yang, M. Gao, J. Phys. Chem. B 107, 8 (2003)

    Article  Google Scholar 

  12. S.K. Poznyak, N.P. Osipovich, A. Shavel, D.V. Talapin, M. Gao, A. Eychmu¨ller, N. Gaponik, J. Phys. Chem. B 109, 1094 (2005)

    Article  Google Scholar 

  13. Gong Y, Gao M, Wang D, Möhwald H: Chem. Mater.. 2005, 17: 2648. COI number [1:CAS:528:DC%2BD2MXjsFahs7o%3D] 10.1021/cm047932c

    Article  Google Scholar 

  14. Dong C, Qian H, Fang N, Ren J: J. Phys. Chem. B. 2006, 110: 11069. COI number [1:CAS:528:DC%2BD28XkvVWhsLg%3D] 10.1021/jp060279r

    Article  Google Scholar 

  15. Li CL, Ando M, Murase N: J. Non Cryst. Solids. 2004, 342: 32. COI number [1:CAS:528:DC%2BD2cXnsFSms74%3D] 10.1016/j.jnoncrysol.2004.06.019

    Article  Google Scholar 

  16. Gaponik NP, Talapin DV, Rogach AL, Hoppe K, Shevchenko EV, Kornowski A, Eychmüller A, Weller H: J. Phys. Chem. B. 2002, 106: 7177. COI number [1:CAS:528:DC%2BD38Xks1egsrg%3D] 10.1021/jp025541k

    Article  Google Scholar 

  17. Rogach AL: Mater. Sci. Eng. B. 2000, 69: 435. 10.1016/S0921-5107(99)00231-7

    Article  Google Scholar 

  18. Tang Z, Kotov NA, Giersig M: Science. 2002, 297: 237. ; COI number [1:CAS:528:DC%2BD38XlsVCns7g%3D]; Bibcode number [2002Sci...297..237T] 10.1126/science.1072086

    Article  Google Scholar 

  19. Tang Z, Ozturk B, Wang Y, Kotov NA: J. Phys. Chem. B. 2004, 108: 6927. COI number [1:CAS:528:DC%2BD2cXjs1SjsbY%3D] 10.1021/jp049038e

    Article  Google Scholar 

  20. Yu WW, Qu L, Guo W, Peng X: Chem. Mater.. 2003, 15: 2854. COI number [1:CAS:528:DC%2BD3sXks12msrw%3D] 10.1021/cm034081k

    Article  Google Scholar 

  21. Talapin DV, Haubold S, Rogach AL, Kornowski A, Haase M, Weller H: J. Phys. Chem.. 2001, 105: 2260.

    Article  Google Scholar 

  22. Nakashima T, Kawai T: Chem. Commun. 2005, 12: 1643. COI number [1:CAS:528:DC%2BD2MXjsVaqsLY%3D] 10.1039/b418001a

    Article  Google Scholar 

  23. The 15% value is evaluated from the fact, that the average C/S ratio in NCs revealed by the elemental analysis is about 1.7 (Table 1) and not 2 as expected for the undecomposed TGA

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We are grateful to Dr. Frank Meyberg and Ms. Torborg Krugmann for the elemental analysis and Dr. Stephen Hickey for helpful discussion. We also thank Sandra Hirzberger and Alexey Shavel for assisting with the powder XRD measurements and chemical syntheses respectively. NM appreciates the financial support provided by German Academic Exchange Service and Japan Society for the Promotion of Science.

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Correspondence to Norio Murase.

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Murase, N., Gaponik, N. & Weller, H. Effect of chemical composition on luminescence of thiol-stabilized CdTe nanocrystals. Nanoscale Res Lett 2, 230 (2007).

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  • CdTe
  • Nanocrystal
  • Surfactant
  • Thioglycolic acid
  • Photoluminescence
  • Efficiency
  • Elemental determination