Surface studies of polyimide thin films via surface-enhanced Raman scattering and second harmonic generation

Jason J. Ge; Gi Xue; Fuming Li; Kevin W. McCreight; Shy Yeu Wang; Frank W. Harris; Stephen Z.D. Cheng; Xiaowei Zhuang; Seok Choel Hong; Y. R. Shen

doi:10.1002/(sici)1521-3927(19981201)19:12<619::aid-marc619>3.3.co;2-q

Surface studies of polyimide thin films via surface-enhanced Raman scattering and second harmonic generation

Jason J. Ge, Gi Xue, Fuming Li, Kevin W. McCreight, Shy Yeu Wang, Frank W. Harris, Stephen Z.D. Cheng, Xiaowei Zhuang, Seok Choel Hong, Y. R. Shen

Research output: Contribution to journal › Article › peer-review

37 Citations (Scopus)

Abstract

Two polyimides having the same backbone chemical structure and different pendant side groups at the 2- and 2′-positions of the diamine, the six methylene units capped with 4-cyanobiphenyl end groups and trifluoromethyl, were synthesized (6FDA-6CBO and 6FDA-PFMB). Surface-enhanced Raman scattering and surface optical second harmonic generation measurements show that after rubbing the major change in 6FDA-PFMB surface appears in the orientation of the dianhydride, which was originally planar, but becomes tilted with respect to the surface plane. In the case of 6FDA-6CBO, rubbing also causes the originally planar 4-cyanobiphenyls to tilt away from the surface and assume an azimuthally anisotropic distribution.

Original language	English
Pages (from-to)	619-623
Number of pages	5
Journal	Macromolecular Rapid Communications
Volume	19
Issue number	12
DOIs	https://doi.org/10.1002/(sici)1521-3927(19981201)19:12<619::aid-marc619>3.3.co;2-q
Publication status	Published - 1998 Dec
Externally published	Yes

ASJC Scopus subject areas

Organic Chemistry
Polymers and Plastics
Materials Chemistry

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10.1002/(sici)1521-3927(19981201)19:12<619::aid-marc619>3.3.co;2-q

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Ge, J. J., Xue, G., Li, F., McCreight, K. W., Wang, S. Y., Harris, F. W., Cheng, S. Z. D., Zhuang, X., Hong, S. C., & Shen, Y. R. (1998). Surface studies of polyimide thin films via surface-enhanced Raman scattering and second harmonic generation. Macromolecular Rapid Communications, 19(12), 619-623. https://doi.org/10.1002/(sici)1521-3927(19981201)19:12<619::aid-marc619>3.3.co;2-q

Ge, JJ, Xue, G, Li, F, McCreight, KW, Wang, SY, Harris, FW, Cheng, SZD, Zhuang, X, Hong, SC & Shen, YR 1998, 'Surface studies of polyimide thin films via surface-enhanced Raman scattering and second harmonic generation', Macromolecular Rapid Communications, vol. 19, no. 12, pp. 619-623. https://doi.org/10.1002/(sici)1521-3927(19981201)19:12<619::aid-marc619>3.3.co;2-q

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title = "Surface studies of polyimide thin films via surface-enhanced Raman scattering and second harmonic generation",

abstract = "Two polyimides having the same backbone chemical structure and different pendant side groups at the 2- and 2′-positions of the diamine, the six methylene units capped with 4-cyanobiphenyl end groups and trifluoromethyl, were synthesized (6FDA-6CBO and 6FDA-PFMB). Surface-enhanced Raman scattering and surface optical second harmonic generation measurements show that after rubbing the major change in 6FDA-PFMB surface appears in the orientation of the dianhydride, which was originally planar, but becomes tilted with respect to the surface plane. In the case of 6FDA-6CBO, rubbing also causes the originally planar 4-cyanobiphenyls to tilt away from the surface and assume an azimuthally anisotropic distribution.",

author = "Ge, {Jason J.} and Gi Xue and Fuming Li and McCreight, {Kevin W.} and Wang, {Shy Yeu} and Harris, {Frank W.} and Cheng, {Stephen Z.D.} and Xiaowei Zhuang and Hong, {Seok Choel} and Shen, {Y. R.}",

year = "1998",

month = dec,

doi = "10.1002/(sici)1521-3927(19981201)19:12<619::aid-marc619>3.3.co;2-q",

language = "English",

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T1 - Surface studies of polyimide thin films via surface-enhanced Raman scattering and second harmonic generation

AU - Ge, Jason J.

AU - Xue, Gi

AU - Li, Fuming

AU - McCreight, Kevin W.

AU - Wang, Shy Yeu

AU - Harris, Frank W.

AU - Cheng, Stephen Z.D.

AU - Zhuang, Xiaowei

AU - Hong, Seok Choel

AU - Shen, Y. R.

PY - 1998/12

Y1 - 1998/12

N2 - Two polyimides having the same backbone chemical structure and different pendant side groups at the 2- and 2′-positions of the diamine, the six methylene units capped with 4-cyanobiphenyl end groups and trifluoromethyl, were synthesized (6FDA-6CBO and 6FDA-PFMB). Surface-enhanced Raman scattering and surface optical second harmonic generation measurements show that after rubbing the major change in 6FDA-PFMB surface appears in the orientation of the dianhydride, which was originally planar, but becomes tilted with respect to the surface plane. In the case of 6FDA-6CBO, rubbing also causes the originally planar 4-cyanobiphenyls to tilt away from the surface and assume an azimuthally anisotropic distribution.

AB - Two polyimides having the same backbone chemical structure and different pendant side groups at the 2- and 2′-positions of the diamine, the six methylene units capped with 4-cyanobiphenyl end groups and trifluoromethyl, were synthesized (6FDA-6CBO and 6FDA-PFMB). Surface-enhanced Raman scattering and surface optical second harmonic generation measurements show that after rubbing the major change in 6FDA-PFMB surface appears in the orientation of the dianhydride, which was originally planar, but becomes tilted with respect to the surface plane. In the case of 6FDA-6CBO, rubbing also causes the originally planar 4-cyanobiphenyls to tilt away from the surface and assume an azimuthally anisotropic distribution.

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Surface studies of polyimide thin films via surface-enhanced Raman scattering and second harmonic generation

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