Mihai Laura, Caruntu Gabriel, Rotaru Aurelian, Caruntu Daniela, Mykhailovych Vasyl, Ciomaga Cristina Elena, Horchidan Nadejda, Stancalie Andrei, Marcu Aurelian
Center for Advanced Laser Technology, National Institute for Laser Plasma and Radiation Physics, 409 Atomistilor St., 077125 Magurele, Romania.
Department of Chemistry and Biochemistry, Central Michigan University, 1200 S. Franklin St., Mount Pleasant, MI 48859, USA.
Materials (Basel). 2023 Feb 2;16(3):1292. doi: 10.3390/ma16031292.
BaTiO (BTO) nanoparticles produced by wet chemistry methods were embedded in several types of flexible materials in order to fabricate flexible electronic devices. Starting from the produced nanoparticle dielectric properties, flexible material dielectric properties were tested for high electromagnetic frequencies (30 GHz-2 THz) using time domain spectroscopy. Dielectric performances of the different materials obtained with variable nanoparticle concentrations up to 40 wt.%, embedded in, gelatin, epoxy, and styrene-butadiene were compared at several working temperatures between 0 °C and 120 °C. Beside the general trend of ε' decrease with temperature and loses increase with the operating frequency, we were able to identify few matrix dependent optimal nanoparticle concentrations. The best composite performances were achieved by the BTO-SBS matrix, with filler concentration of 2 wt.%, where the losses have been of 1.5%, followed by BTO-gelatin matrix, with filler concentration of 40 wt.%, with higher losses percent of almost 10% for THz frequencies.
通过湿化学方法制备的钛酸钡（BTO）纳米颗粒被嵌入几种类型的柔性材料中，以制造柔性电子器件。从所制备的纳米颗粒的介电性能出发，利用时域光谱法对柔性材料在高电磁频率（30 GHz - 2 THz）下的介电性能进行了测试。在0°C至120°C的几个工作温度下，比较了嵌入明胶、环氧树脂和丁苯橡胶中、纳米颗粒浓度高达40 wt.% 时不同材料的介电性能。除了ε' 随温度降低和损耗随工作频率增加的总体趋势外，我们还能够确定一些与基体相关的最佳纳米颗粒浓度。BTO - SBS基体在填料浓度为2 wt.% 时实现了最佳的复合性能，其损耗为1.5%，其次是BTO - 明胶基体，填料浓度为40 wt.%，在太赫兹频率下损耗百分比高达近10%。
