Nonlinear laser intensity dependence of the formation of carboxylic acid groups at the surface of polymer films: The effect of coupling of radical intermediates

Langmuir

Volumn 13, Issue 10, 1997, Pages 2603-2605

  Ichinose, Nobuyuki ^a   Tamai, Toshiyuki ^b   Kawanishi, Shunichi ^a   Hashida, Isao ^b   Mizuno, Kazuhiko ^c  

^a JAPAN ATOMIC ENERGY AGENCY   (Japan)

^b OSAKA MUNICIPAL TECHNICAL RESEARCH INSTITUTE   (Japan)

^c Osaka Prefecture University   (Japan)

Author keywords

[No Author keywords available]

Indexed keywords

EID: 0005432724     PISSN: 07437463     EISSN: None     Source Type: Journal    
DOI: 10.1021/la960949s     Document Type: Article

References (17)

1. Srinivasan, R.; Mayne-banton, V. Appl. Phys. Lett. 1982, 41, 576.
2. Srinivasan, R. J. Vac. Sci. Technol. 1983, B1, 923.
3. Srinivasan, R.; Braren, B. Chem. Rev. 1989, 89, 1303.
4. (a) Lazare, S.; Srinivasan, R. J. Phys. Chem. 1986, 90, 2124. Hiraoka, H.; Lazare, S. Appl. Surf. Sci. 1990, 46, 264.
5. (a) Lazare, S.; Srinivasan, R. J. Phys. Chem. 1986, 90, 2124. Hiraoka, H.; Lazare, S. Appl. Surf. Sci. 1990, 46, 264.
6. (b) Niino, H.; Yabe, A. Appl. Phys. Lett. 1992, 60, 2697.
7. (c) Uchida, T.; Sugimura, H.; Kemnitz, K.; Shimo, N.; Masuhara, H. Appl. Phys. Lett. 1991, 59, 3189. Uchida, T.; Shimo, N.; Sugimura, H.; Kemnitz, K.; Masuhara, H. J. Appl. Phys. 1994, 76, 4872.
8. (c) Uchida, T.; Sugimura, H.; Kemnitz, K.; Shimo, N.; Masuhara, H. Appl. Phys. Lett. 1991, 59, 3189. Uchida, T.; Shimo, N.; Sugimura, H.; Kemnitz, K.; Masuhara, H. J. Appl. Phys. 1994, 76, 4872.
9. Tamai, T.; Ichinose, N.; Kawanishi, S.; Hashida, I.; Inoue, H.; Mizuno, K. Polymer 1996, 37, 5525.
10. 2).
11. (a) Nakanishi, K. Ph.D. thesis, University of Osaka Prefecture, 1993.
12. b) Mizuno, K.; Kobata, T.; Maeda, R.; Otsuji, Y. Chem. Lett. 1990, 1821.
13. Anionic or acidic dyes such as sulforhodamine were not adsorbed onto the irradiated surface. See also ref 4c.
14. In the strict sense, this adsorption must be in a Langmuir-type equilibrium and take place in a ratio of less than 1:1 to the carboxylic acid groups. However, adsorbed Rh6G was not removed by washing with water indicating that the reaction proceeded almost irreversibly. A quantitative fluorometric analysis by the similar labeling of carboxylic groups with cationic dyes on polymer surfaces has been reported very recently: Ivanov, V. B.; Behnish, J.; Holländer, A.; Mehdorn, F.; Zimmerman, H. Surf. Interface Anal. 1996, 24, 257.
15. 5 The oxygenated layer was removed by the treatment with the ethanol-benzene mixture. The profile of the positive image of the mask was obtained by atomic force microscopy and the depth was estimated from its cross section.
16. Contributions of other two-photonic processes in the present power dependence such as singlet-singlet (S-S) or triplet-triplet (T-T) anihilation or two-photonic absorption can be ruled out because these processes produce at least one excited state of the chromophore to lead to the radical formation. The linear relationship observed for P4MS also supprots the absence of these processes.
17. -1, whereas PTMSMS film became insoluble with 10 pulses of the same intensity. This also rules out the incorporation of an excited benzylic radical as a mechanism for the two-photon cross-linking process.