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Raman Scattering and Photoluminescence of Pristine and Ion Implanted Langmuir-Blodgett Polydiacetylene Thin Films

Published online by Cambridge University Press:  26 February 2011

F. Kaneko ,
M. S. Dresselhaus ,
G. Braunstein ,
T. Kouno ,
Y. Liu ,
M. Shibata ,
K. SAito  and
S. Kobayashi
F. Kaneko
Affiliation:
Massachusetts Institute of Technology, Cambridge, MA 02139, USA NIIGATA Univ., Niigata, JAPAN
M. S. Dresselhaus
Affiliation:
Massachusetts Institute of Technology, Cambridge, MA 02139, USA
G. Braunstein
Affiliation:
Massachusetts Institute of Technology, Cambridge, MA 02139, USA
T. Kouno
Affiliation:
Massachusetts Institute of Technology, Cambridge, MA 02139, USA
Y. Liu
Affiliation:
Massachusetts Institute of Technology, Cambridge, MA 02139, USA
M. Shibata
Affiliation:
NIIGATA Univ., Niigata, JAPAN
K. SAito
Affiliation:
NIIGATA Univ., Niigata, JAPAN
S. Kobayashi
Affiliation:
NIIGATA Univ., Niigata, JAPAN
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Abstract

Fundamental optical properties of Langmuir-Blodgett polydiacetylene (LB PDA) ultra thin films are investigated. The LB films exhibit a strong absorption peak at about 16000 cm-1 and a weak and broad peak at about 17500 cm-1; the color of the film is blue. After annealing at 90°C, a blue shift of the absorption peaks is observed; that is, the color of the LB films changes from blue to red. The phase transition corresponding to the color change is studied using Raman spectroscopy as a function of annealing temperature. For annealing temperatures between 50 and 60°C, the results show significant change in the ratio of Raman line intensities due to C≡C and C=C stretch modes. Such a transition is also observed for laser annealed LB PDA films. Furthermore, the photoluminescence (PL) properties of pristine (blue), annealed (red) and ion implanted (red) LB PDA films are investigated. The photoluminescence of both pristine and annealed LB PDA films show sharp peaks at about 15500 cm-1. The annealed LB PDA films have an additional small peak or shoulder at about 18000 cm-1. The photoluminescence peaks of red films implanted with 200keV As+ ions are observed at about 16000 cm-1 and become broad with increasing ion implantation dose in the range 1012–1015 cm-2.

Type
Articles
Information
MRS Online Proceedings Library (OPL) , Volume 79: Symposium F – Scattering, Deformation and Fracture in Polymers , 1986 , 197
Copyright
Copyright © Materials Research Society 1987

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References

1 Polydiacetylene, edited by Bloor, D. and Chance, R.R. (Martinus Nijihoff Publishers, Boston, MA 1985).Google Scholar
2 Electronic Properties of Polymers and Related Compounds, edited by Mehring, H. and Roth, S. (Springer-Verlag, Berlin Heidelberg 1985), pp. 234–262.Google Scholar
3 Sandman, D.J., Tripathy, S.K., Elman, B.S. and Samuelson, L.A., Synthetic Metals 15, 229 (1986).CrossRefGoogle Scholar
4 Chollet, P.A., Kajzar, F. and Messier, J., Thin Solid Films 132, 1 (1985).Google Scholar
5 Chen, Y.J., Carter, G.M. and Tripathy, S.K., Solid State Commun. 54, 19 (1985).Google Scholar