Skip to main content Accessibility help
×
Home

Structural and optical properties of CdSe, CdTe and CdSeTe nanoparticles dispersed in SiO2 films

  • P. Babu Dayal (a1), N. V. Rama Rao (a1), B. R. Mehta (a1), S. M. Shivaprasad (a2) and P. D. Paulson (a3)...

Abstract

CdSexTe1-x nanoparticles (with different stoichiometry ratio x) dispersed in silicon dioxide films have been grown by magnetron sputtering technique followed by thermal annealing. Effect of thermal annealing conditions on the structural, compositional, optical and electronic properties of nanoparticles has been studied using GAXRD, XPS, TEM, and spectroscopic ellipsometry techniques. A structural transformation in the nanoparticle core mediated purely by surface layer effects in the case of CdTe and a spontaneous self-organization of nanoparticles into nanorods in the case of CdSe via fractal growth has been observed. Preliminary observations from the ellipsometry measurements carried out on some of these nanoparticle films shows a blue shift of absorption edge.

Copyright

References

Hide All
1. Ijima, S. I., Nature (London) 354, 56 (1991).
2. Tang, Z., Kotov, N. A., Giergig, M., Science 297, 237 (2002).
3. Gao, X., Chan, W. C. W. and Nie, S., J. Bio-med. Optics 7, 532 (2002).
4. Huynh, W. H., Ditlmer, J. J. and Alivisatos, A. P., Science 295, 2425 (2002)
5. Nirmal, M., Norris, D., Kuno, M., Bawendi, M.G., Efros, Al. l. and Rosen, M., Phys. Rev. Lett. 75, 3728 (1995).
6. Mohamed, M. B., Burda, C. and Sayeed, M. A.El., Nano. Lett. 1, 589 (2001).
7. Link, S. and Sayeed, M.A.El., J. Appl. Phys. 92, 6799 (2002).
8. Li, L. S., Hu, J., Yang, N. and Alivisatos, A. P., Nano. Lett. 1, 349 (2001).
9. Wang, X-Y., Zhang, J-Y., Wazzal, A., Darragh, M. and Xino, M., Appl. Phys. Lett. 81 (2002) 4829.
10. Simmons, J. H., J. Non-cryst. Solids 239, 1 (1998) [Morey Award Paper]
11. Resifeld, R., J. Alloys. Comp. 341, 56 (2002)
12. Meldrum, Al., Haglund, R. F. Jr, Boatner, L. A. and White, C. W., Adv. Mater. 13, 1431 (2001).
13. Bondar, I. V. et al, Semiconductors 36, 298 (2002)
14. Caseri, W., Macromol. Rapid. Commun. 21, 705 (2000)
15. Efros, Al. L. and Rosen, M., Annu. Rev. Mater. Sci. 30, 475 (2000)
16. Woggon, U. in Optical properties of semiconductor quantum dots (Springer, Heidelberg, p-16, 1997)
17. Tsunetomo, K., Nasu, H., Katiyama, H., Kawabuchi, A, Osaka, Y., Jpn. J. Appl. Phys. 28, 1928 (1989)
18. Joint Committee on Powder Diffraction Standards data cards, Cubic CdTe-150770, Hexagonal CdTe-800088 and Monoclinic CdTeO3-491757.
20. Babu Dayal, P., Mehta, B. R., Shivaprasad, S. M. and Aparna, Y., Appl. Phys. Lett. 81, 4254 (2002)
21. Babu Dayal, P., Mehta, B. R. and Paulson, P. D.. (Communicated to Appl. Phys. Lett)
22. Simmons, J. H., J. Non-cryst. Solids 239, 1 (1998) [Morey Award Paper]
23. Roth, L. M. and Lax, B., Phys, Rev. Lett. 3, 217 (1959)
24. Joint Committee on Powder Diffraction Standards data cards, Cubic CdSe:16–191, Hexagonal CdSe:77–2307 and CdSeO3-491757.
25. Tang, Z., Kotov, N. A., Giergig, M., Science 297, 237 (2002).
26. Peng, Q., Dong, Y., Deng, Z. and Li, Y., In-org. Chem. 41, 5249 (2002)
27. EL-Nahass, M. M., Farag, A.A. M. and El-Sayed, H.E.A., Appl. Phys. A 77, 819 (2003)
28. Rlide, David in Handbook of Chemistry and Physics (CRC Press, 82 nd edition, 20012002)

Metrics

Full text views

Total number of HTML views: 0
Total number of PDF views: 0 *
Loading metrics...

Abstract views

Total abstract views: 0 *
Loading metrics...

* Views captured on Cambridge Core between <date>. This data will be updated every 24 hours.

Usage data cannot currently be displayed