15 October 2012 Biopolymer-based dielectric materials for space environments
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The potential of bio-dielectrics for space applications was explored using deoxyribonucleic acid (DNA)-based biopolymers. Un-doped DNA, as well as titanium dioxide (TiO2) nanoparticle (rutile form)-doped DNA were processed and evaluated. Characterized parameters were temperature stability, resistivity, dielectric constant, dielectric loss and radiation tolerance. The dielectric constant and dielectric loss of un-doped DNA and TiO2-doped DNA were measured for both pre- and post- exposure to approximately100 krad Gamma-ray radiation. There was little change in the dielectric constant and dielectric loss of the un-doped DNA sample with exposure to radiation. However, there was a significant reduction in the dielectric constant of the TiO2-doped DNA sample.
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Fahima Ouchen, Fahima Ouchen, Donna M. Joyce, Donna M. Joyce, Narayanan Venkat, Narayanan Venkat, Steven R. Smith, Steven R. Smith, Guru Subramanyam, Guru Subramanyam, Edward Taylor, Edward Taylor, James G. Grote, James G. Grote, "Biopolymer-based dielectric materials for space environments", Proc. SPIE 8519, Nanophotonics and Macrophotonics for Space Environments VI, 85190L (15 October 2012); doi: 10.1117/12.942153; https://doi.org/10.1117/12.942153

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