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首页> 外文会议>Optical Materials in Defence Systems Technology III; Proceedings of SPIE-The International Society for Optical Engineering; vol.6401 >Optical properties of Deoxyribonucleic Acid (DNA) polymer host
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Optical properties of Deoxyribonucleic Acid (DNA) polymer host

机译：脱氧核糖核酸（DNA）聚合物主体的光学性质

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摘要

DNA is emerging as a novel exciting photonic polymer material due to its unique double-helix structure and the ability to act as a host capable to be aligned itself and capable of inducing orientation of nonlinear optical (NLO) chromophores. Physical and optical properties of DNA are remarkably modified with the alteration of the nucleic acid counter-ions. We determined optical properties of salmon-derived DNA and DNA complexed with cetyltrimethyl-ammonium (CTMA) surfactant in solutions and films. Absorption coefficients derived for an average nucleotide formula weight indicated DNA of high purity. Prism coupling measurements showed a large birefringence in refractive indices in the direction parallel and perpendicular to the surface plane of the films indicating anisotropic alignment of DNA molecules. Almost isotropic refractive indices were measured in DNA-CTMA films indicating disorder in orientation of DNA-CTMA molecules in the films. Doping with about 5 wt% Disperse Red 1 (DR1) essentially did not change this very weak birefringence in the DNA-CTMA films. Optical properties of DNA films were sensitive to environmental humidity while the DNA-CTMA films were less susceptible to it. The Z-scan technique using femtosecond pulsed laser system was employed to determine the NLO properties of DNA in solutions in the 530-1300 nm wavelength range.
机译：DNA凭借其独特的双螺旋结构以及充当能够自我对齐并能够诱导非线性光学（NLO）发色团取向的宿主的能力，正成为一种新型的令人兴奋的光子聚合物材料。 DNA的物理和光学性质会随着核酸抗衡离子的改变而显着改变。我们确定了鲑鱼来源的DNA和与十六烷基三甲基铵（CTMA）表面活性剂复合的DNA在溶液和薄膜中的光学性质。从平均核苷酸式量得出的吸收系数表明DNA具有高纯度。棱镜耦合测量结果显示，在平行于膜表面和垂直于膜表面的方向上，折射率有很大的双折射，表明DNA分子各向异性取向。在DNA-CTMA膜中测得几乎各向同性的折射率，表明膜中DNA-CTMA分子的取向无序。掺杂约5 wt％的分散红1（DR1）基本上不会改变DNA-CTMA膜中这种非常弱的双折射。 DNA薄膜的光学特性对环境湿度敏感，而DNA-CTMA薄膜则较不敏感。使用飞秒脉冲激光系统的Z扫描技术用于确定530-1300 nm波长范围内溶液中DNA的NLO性质。

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