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Synergistic effect of binary ligands on nucleation and growth/size effect of nanocrystals: Studies on reusability of the solvent

  • Chandan H.R. (a1), Saravanan V. (a1), Ranjith Krishna Pai (a1) and R. Geetha Balakrishna (a1)

Abstract

An attempt to reduce the effect of major toxic components namely phosphine ligands and unsaturated solvents as being used in conventional nanocrystal synthesis, has been made with a new binary ligand, and a reusable solvent N-octadecane for a smokeless and clean synthesis procedure. The optimized effects of the two ligands oleic acid and octadecyl amine on the nucleation rate and growth of CdSe nanocrystals (NCs) are reported and substantiated by AFM analysis. Oleic acid accelerates particle ripening and nuclei growth, but inhibits nucleation whereas octadecyl amine catalyses nucleation and very gradually improves growth to obtain small stable NCs. Another important feature of the present study is the replacement of 1-octadecene by a competitive N-octadecane as a solvent in such ligand mediated nanocrystal synthesis. The GCMS analysis reports a recovery of 95% of solvent after reuse, thus opening a scope for environmental friendly processes.

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a) Address all correspondence to this author. e-mail: br.geetha@jainuniversity.ac.in

References

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1. Peng, Z-A. and Peng, X.: Formation of high-quality CdTe, CdSe, and CdS nanocrystals using CdO as precursor. J. Am. Chem. Soc. 123, 183 (2001).
2. Qu, L., Peng, Z-A., and Peng, X.: Alternative routes toward high quality CdSe nanocrystals. Nano Lett. 1(6), 333 (2001).
3. Reiss, P., Bleuse, J., and Pron, A.: Highly luminescent CdSe/ZnSe core/shell nanocrystals of low size dispersion. Nano Lett. 2(7), 781 (2002).
4. Yu, K., Singh, S., Patrito, N., and Chu, V.: Effect of reaction media on the growth and photoluminescence of colloidal CdSe. Langmuir 20, 11161 (2004).
5. Li, W., Wang, M., Xie, F., Zhu, S., and Zhao, Y.: Synthesis of nanocrystalline CdS quantum dots via paraffin liquid as solvent and oleic acid as the reacting media. Int. J. Nanosci. 11(6), 1240038 (2010).
6. Liu, X., Jiang, Y., Wang, C., Li, S., Ln, X., Chen, Y., and Zhong, H.: Synthesis and spectrum stability of high quality CdTe quantum dots capped with state group in N-oleylmorpholine solvent. J. Cryst. Growth 312, 2656 (2010).
7. Yu, W-W. and Peng, X.: Formation of high-quality CdS and other II–VI semiconductor nanocrystals in noncoordinating solvents: Tunable reactivity of monomer. Angew. Chem., Int. Ed. 41(13), 2368 (2002).
8. Embden, J-V. and Mulvaney, P.: Nucleation and growth of CdSe nano crystals in binary ligand system. Langmuir 21, 10226 (2005).
9. Al-Salim, N., Young, A-G., Tilley, R-D., James McQuilan, A., and Xia, J.: Synthesis of CdSeS nanocrystals in coordinating and noncoordinating solvents: Solvents role in evolution of the optical and structural properties. Chem. Mater. 19, 5185 (2007).
10. Sapra, S., Andrey Rogach, L., and Feldmann, J.: Phosphine-free synthesis of monodisperse CdSe nanocrystals in olive oil. J. Mater. Chem. 16, 3391 (2006).
11. Washington, A.L. II and Strouse, G.F.: Microwave synthesis of CdSe and CdTe nanocrystals in nonabsorbing alkanes. J. Am. Chem. Soc. 130, 8916 (2008).
12. Yu, W-W., Qu, L., Guo, W., and Peng, X.: Experimental determination of the extinction coefficient of CdTe, CdSe and CdS nanocrystals. Chem. Mater. 15, 2354 (2003).
13. Hubschmann, H-J.: Handbook of GC/MS: Fundamentals and Applications (John Wiley & Sons, Hoboken, NJ, 2009).
14. Dyer, J-R.: Applications of Absorption Spectroscopy of Organic Compounds (Prentice-Hall, Englewood Cliffs, NJ, 1965).
15. Pavia, D-L., Lampman, G-M., Kriz, G-S., Sierra, P., and Shcherbyna, L.: Introduction to Spectroscopy (Cengage Learning, Brooks/Cole, Belmont, 2008).
16. Al-Mamun, M.A.: Study of binary systems of long chain alcohols and acids. J. Am. Oil Chem. Soc. 51, 229 (1974).
17. Sun, M. and Yang, X.: Phosphine free synthesis of high quality CdSe nano crystals in non coordination solvents: “Activating agent” and “nucleating agent” controlled nucleation and growth. J. Phys. Chem. C 113, 8701 (2009).
18. Mohamed, M.B., Tonti, D., Al-Salman, A., Chemseddine, A., and Chergui, M.: Synthesis of high quality zinc blend CdSe nanocrystals. J. Phys. Chem. B 140, 10533 (2005).
19. Murray, C-B., Kagan, C-R., and Bawendi, M-G.: Synthesis and characterization of monodisperse nanocrystals and close-packed nanocrystal assemblies. Annu. Rev. Mater. Sci. 30, 545 (2000).
20. Babentsov, V., Riegler, J., Schneider, J., Ehlert, O., Nann, T., and Fiederle, M.: Deep level defect luminescence in cadmium selenide nanocrystals film. J. Cryst. Growth 280, 508 (2005).
21. Vega Macotela, L-G., Torchynska, T-V., and Douda, J.: Radiative interface state study in CdSe/ZnS quantum dots covered by polymer. J. Mater. Sci. Eng. B 176, 1349 (2011).
22. Jasieniak, J., Bullen, C., and Embden, J-V.: Phosphine free synthesis of CdSe nanocrystals. J. Phys. Chem. B 109, 20665 (2005).
23. Madelung, O., Rössler, U., and Schulz, M.: II-VI and I-VII compounds; Semimagnetic compounds semiconductors. Landolt-Börnstein Group III Condensed Matter: Numerical Data and Functional Relationships in Science and Technology, Vol. 41 (Springer, Berlin, 1999).
24. Yusuf, H., Kim, W-G., Hoon Lee, D., Guo, Y., and Moffitt, M.G.: Size control of mesoscale aqueous assemblies of quantum dots and block copolymers. Langmuir 23, 868 (2007).
25. Merz, J-L., Lee, S., and Furdyna, J-K.: Self organised growth, ripening and optical properties of wide bad gap II-VI quantum dots. J. Cryst. Growth 184185, 228 (1998).
26. Peng, X., Wickham, J., and Alivisatos, A-P.: Kinetics of II-VI and III-V colloidal semiconductor nanocrystal growth: “Focusing” of size distributions. J. Am. Chem. Soc. 120, 5343 (1998).
27. Chandan, H-R. and Geetha Balakrishna, R.: Study on precipitation efficiency of solvents in post preparative treatment of nanocrystals. J. Mater. Res. 28, 3003 (2013).
28. Pillai, S. and Krishna Pai, R.: Controlled growth and formation of SAMs investigated by atomic force microscopy. Ultramicroscopy 109, 161166 (2009).
29. Pillai, S. and Krishna Pai, R.: Effect of lateral morphology formation of polymer blend toward patterning silane-based SAMs using selective dissolution method. Ultramicroscopy 108, 458464 (2008).
30. Lu, W., Wang, B., Zeng, J., Wang, X., Zhang, S., and Hou, J-G.: Synthesis of core/shell nanoparticles of Au/CdSe via Au−Cd bialloy precursor. Langmuir 21, 3684 (2005).

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Synergistic effect of binary ligands on nucleation and growth/size effect of nanocrystals: Studies on reusability of the solvent

  • Chandan H.R. (a1), Saravanan V. (a1), Ranjith Krishna Pai (a1) and R. Geetha Balakrishna (a1)

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