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Proceedings Paper

The effects of gamma-ray irradiation on organic materials of different conjugation lengths
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Paper Abstract

The radiation resistance of organic electro-optic and optoelectronic materials of different conjugation lengths for space applications is receiving increased attention. Earlier investigation reported that guest-host (G-H) poled polymer EO modulator devices composed of a phenyltetraene bridge-type chromophore in amorphous polycarbonate (CLD/APC) did not exhibit a decrease in EO response (i.e., an increase in modulation-switching voltage- Vπ) following irradiation by low dose [10-160 krad(Si)] 60Co gamma-rays. In this work, the post-irradiation responses of 60Co gamma-rays on CLD1/APC thin films are examined by various chemical and spectroscopic methods including: a solubility test, thin-layer chromatography, proton nuclear magnetic resonance spectroscopy, UV-vis absorption, and infra-red absorption. The results indicate that CLD1 and APC did not decompose under gamma-ray irradiation at dose levels ranging from 66-274 krad(Si) and from 61-154 krad(Si), respectively which support the previously reported data. A comparison with an in situ proton irradiated DRI/PMMA material is also presented.

Paper Details

Date Published: 9 September 2009
PDF: 8 pages
Proc. SPIE 7467, Nanophotonics and Macrophotonics for Space Environments III, 746707 (9 September 2009); doi: 10.1117/12.827288
Show Author Affiliations
Cheng Zhang, Norfolk State Univ. (United States)
Edward W. Taylor, International Photonics Consultants, Inc. (United States)


Published in SPIE Proceedings Vol. 7467:
Nanophotonics and Macrophotonics for Space Environments III
Edward W. Taylor; David A. Cardimona, Editor(s)

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