Trifonova Yordanka, Stoilova Ani, Dimov Deyan, Mateev Georgi, Ivanova Vladislava, Mitov Iliyan, Surleva Olya
Department of Physics, University of Chemical Technology and Metallurgy, 8 Kl. Ohridski Blvd., 1756 Sofia, Bulgaria.
Institute of Optical Materials and Technologies, Bulgarian Academy of Sciences, Acad. Georgi Bonchev Bl. 109, 1113 Sofia, Bulgaria.
Materials (Basel). 2025 Aug 15;18(16):3837. doi: 10.3390/ma18163837.
Bulk chalcogenides from the system (GeTe)In, where x = 0; 5 and 10 mol%, were synthesized by a two-step melt quenching technique. New layered composite materials based on them and the azo polymer [1-4-(3-carboxy-4-hydrophenylazo) benzensulfonamido]-1,2-ethanediyl, sodium salt] has been prepared through spin coating, electrospray deposition and via vacuum-thermal evaporation of the chalcogenide and spin coating of the azo polymer onto it. Using the latter technology, a material consisting of one chalcogenide and one azo polymer film and three chalcogenide and three azo polymer films has been fabricated. The carried-out SEM analysis shows that in the materials, initially prepared as a bilayer and multilayer structure, diffusion at the chalcogenide/polymer interface occurs leading to the formation of a homogenous composite environment. Birefringence was induced at 444 nm in all the fabricated thin film materials. The highest value of the maximal induced birefringence has been measured for the material fabricated as a stack, Δn = 0.118. For the material prepared as a bilayer structure and the composite material obtained through electrospray deposition, the maximal induced birefringence takes values of Δn = 0.101 and Δn = 0.095, respectively. The sample prepared via spin coating of the chalcogenide/PAZO dispersion has the lowest value of the maximal induced birefringence (Δn = 0.066) in comparison to the pure PAZO polymer film (Δn = 0.083).
通过两步熔体淬火技术合成了体系（GeTe）In中x = 0、5和10摩尔％的块状硫族化物。基于它们以及偶氮聚合物[1-4-（3-羧基-4-氢苯基偶氮）苯磺酰胺基]-1,2-乙二基钠盐制备了新型层状复合材料，方法是通过旋涂、电喷雾沉积以及硫族化物的真空热蒸发并将偶氮聚合物旋涂在其上。使用后一种技术，制备了由一层硫族化物和一层偶氮聚合物薄膜以及三层硫族化物和三层偶氮聚合物薄膜组成的材料。进行的扫描电子显微镜分析表明，在最初制备为双层和多层结构的材料中，硫族化物/聚合物界面处发生扩散，导致形成均匀的复合环境。在所有制备的薄膜材料中，在444 nm处都诱导出了双折射。对于堆叠制备的材料，测得的最大诱导双折射的最高值为Δn = 0.118。对于双层结构制备的材料和通过电喷雾沉积获得的复合材料，最大诱导双折射的值分别为Δn = 0.101和Δn = 0.095。与纯PAZO聚合物薄膜（Δn = 0.083）相比，通过硫族化物/ PAZO分散体旋涂制备的样品的最大诱导双折射值最低（Δn = 0.066）。
