Journal of Chemical Sciences

, Volume 112, Issue 2, pp 109–118 | Cite as

Synthesis of cadmium sulphide in pure and mixed Langmuir-Blodgett films ofn-octadecylsuccinic acid

  • G. Hemakanthi
  • Balachandran Unni Nair
  • Aruna Dhathathreyan


Cadmium sulphide (CdS) nanoparticles were grown by the reaction of sodium sulphide (Na2S) with Langmuir-Blodgett (LB) films of cadmium salts ofn-octadecylsuccinic acid (ODSU) and with LB films of ODSU in mixtures of octadecylamine and octadecyl alcohol. The results indicate that heterogeneous nucleation and aggregation in the pure ODSU LB films due to processes like Ostwald ripening are destabilized by the presence of the long-chain amine and alcohol in mixed systems. CdS nanoparticles in the LB films were monitored by UV-visible absorption spectra, which allow an estimation of the size of the particles. The morphology, size and nature of the nanocrystallites formed depend on whether the sulphidation was done on the pure film or in the mixed films. It is seen that particles of size around 1.6 nm were formed in ODSU/octadecylalcohol and ODSU/ octadecylamine mixed LB films while in pure ODSU films the size was about 2.7 nm. These films showed typical needle-shaped structures, as observed by the optical microscopic technique. Mean size and morphology were confirmed by transmission and scanning electron microscopy, while selective area electron diffraction patterns showed six-fold symmetry and indicated that the CdS crystals grow epitaxially with respect to the monolayer. Further, the crystallisation enhanced in the mixed LB films showed a characteristic zinc oxide (Wurtzite) structure compared with the pure ODSU matrix.


CdS LB films octadecylsuccinic acid epitaxy 


Unable to display preview. Download preview PDF.

Unable to display preview. Download preview PDF.


  1. 1.
    Fendler J H 1994Membrane mimetic approach to advanced materials (Berlin: Springer Verlag)Google Scholar
  2. 2.
    Yang J, Meldrum F C and Fendler J H 1995J. Phys. Chem. 99 5500CrossRefGoogle Scholar
  3. 3.
    Yang J and Fendler J H 1995J. Phys. Chem. 99 5505CrossRefGoogle Scholar
  4. 4.
    Heywood B R and Mann S 1994Adv. Mater. 6 9CrossRefGoogle Scholar
  5. 5.
    Mann S 1993J. Chem. Soc, Dalton Trans. 1Google Scholar
  6. 6.
    Majewski J, Margulis L, Jacqemain D, Leveiller F, Bohm C, Arad T, Talmon Y, Lahav M and Leiserowitz L 1993Science 261 899CrossRefGoogle Scholar
  7. 7.
    Landau E M, Wolf S G, Levanon M, Leiserowitz L, Lahav M and Sagiv J 1989J. Am. Chem. Soc. 111 1436CrossRefGoogle Scholar
  8. 8.
    Majewski J, Popovitz-Biro R, Kjaer K, Als-Nielsen J, Lahav M and Leiserowitz L 1994J. Phys. Chem. 98 4987CrossRefGoogle Scholar
  9. 9.
    Landau E M, Popovitz-Biro R, Levanon M, Leiserowitz L and Sagiv J 1986J. Mol. Cryst. Liq. Cryst. 134 323CrossRefGoogle Scholar
  10. 10.
    Nabok A V, Richardson T, Davis F and Stirling C J M 1997Langmuir 13 3198CrossRefGoogle Scholar
  11. 11.
    Guo S, Popovitz-Biro R, Weissbuch I, Cohen H, Hodes G and Lahav M 1998Adv. Mater. 10 121CrossRefGoogle Scholar
  12. 12.
    Dekany L, Nagy L, Turi L, Kiraly Z, Kotov N A and Fendler J H 1996Langmuir 12 3709CrossRefGoogle Scholar
  13. 13.
    Gao M, Yang Y, Yang B, Bcan F and Shen J 1994J. Chem. Soc., Chem. Commun. 2777Google Scholar
  14. 14.
    Kang Y S, Risbud S, Rabolt J and Stroeve P 1996Langmuir 12 4345CrossRefGoogle Scholar
  15. 15.
    Ogava S, Fan F R F and Bard A J 1995J. Phys. Chem. 99 11182CrossRefGoogle Scholar
  16. 16.
    Hemakanthi G and Dhathathreyan A 1999Langmuir 15 3317CrossRefGoogle Scholar
  17. 17.
    Facci P, Erokhim V, Carrara S and Nicolini C P 1996Proc. Natl. Acad. Sci. USA 93 10556CrossRefGoogle Scholar
  18. 18.
    Collins S J, Dhathathreyan A and Ramasami T 1998J. Coll. Interf. Sci. 179 357Google Scholar
  19. 19.
    Kulish N R, Kunetz U P and Lisitsa M P 1990Ukr. Fiz. Zh. (Russian edn)35 1817Google Scholar
  20. 20.
    Narayanan K L, Vijayakumar K P, Nair K G M and Thampi N S 1997Physica B240 8Google Scholar
  21. 21.
    Kang Y S, Risbud S, Rabolt J and Stroeve P 1996Langmuir 12 4345CrossRefGoogle Scholar
  22. 22.
    Dhathathreyan A and Ramasami T 1997Philos. Mag. Lett. 76 99CrossRefGoogle Scholar

Copyright information

© Indian Academy of Sciences 2000

Authors and Affiliations

  • G. Hemakanthi
    • 1
  • Balachandran Unni Nair
    • 1
  • Aruna Dhathathreyan
    • 1
  1. 1.Chemical LaboratoryCentral Leather Research InstituteAdyar, ChennaiIndia

Personalised recommendations